JP2013005555A - Electromagnetic rotary electric machine - Google Patents

Abstract

An object of the present invention is to improve torque in an electromagnet type rotating electrical machine.
A stator 12 includes a plurality of stator windings 20u and 20v wound around a tooth 18. The rotor 14 includes a rotor core, a plurality of rotor windings 28n and 28s wound around the plurality of main salient poles 26 of the rotor 14, and a plurality of main salient poles 26 by induced electromotive force generated in the rotor windings 28n and 28s. And a diode that is a magnetic characteristic adjusting unit that varies the magnetic characteristic generated in the circumferential direction. The cross-sectional width W1 in the circumferential direction on the tip side of the main body portion of each main salient pole 26 is made larger than the cross-sectional width W2 in the circumferential direction on the root side of each main salient pole 26.
[Selection] Figure 2

Description

  The present invention relates to an electromagnet type rotating electrical machine in which a stator and a rotor are arranged to face each other.

  Conventionally, as described in Patent Document 1, an electromagnetic rotating electrical machine in which a stator and a rotor are arranged to face each other, and salient poles provided at a plurality of locations in the circumferential direction of the rotor, and wound around each salient pole. 2. Description of the Related Art There is known an electromagnet type rotating electrical machine that includes mounted rotor windings and includes a rotor winding that is divided from each other and a diode that is connected to each rotor winding. Each diode rectifies the current flowing in each rotor winding so that the magnetization direction is reversed between salient poles adjacent in the circumferential direction of the rotor. The stator includes teeth provided at a plurality of locations in the circumferential direction of the stator core. A plurality of stator windings are wound around the stator teeth in a concentrated manner. A rotating magnetic field that rotates in the circumferential direction is generated in the stator by passing a plurality of phases of alternating current through the stator windings of the plurality of phases. Then, an induction current is generated in the rotor winding by spatial harmonics that are harmonic components generated in the magnetomotive force distribution generated in the stator, and N and S poles are alternately formed in the salient poles in the circumferential direction of the rotor, Torque is generated in the rotor. At this time, a current rectified by each diode flows through each rotor winding, whereby each salient pole is magnetized to generate a magnet with a fixed magnetic pole.

  In such an electromagnet type rotating electrical machine, the salient pole interacts with the rotating magnetic field of the stator, and torque acts on the rotor. Further, the torque acting on the rotor can be efficiently increased by utilizing the harmonic component of the magnetic field formed by the stator.

JP 2009-112091 A

  In the configuration in which the field is generated by the rotor winding, that is, the magnetic force of the electromagnet is generated as in the rotating electric machine described in Patent Document 1, most of the loss at low load on the rotor side is occupied by the copper loss. In this case, if the loss including the copper loss is increased, the efficiency of the rotating electrical machine is reduced, which causes a reduction in torque. On the other hand, in order to reduce the copper loss, simply reducing the copper loss by increasing the cross-sectional area in the cross section orthogonal to the winding direction of the rotor winding to reduce the copper loss. Space becomes larger. Therefore, in the salient pole of the rotor, the width in the circumferential direction of the rotor is reduced, the width of the tip of the salient pole in the circumferential direction of the rotor and the width of the teeth of the stator are reduced, and the gap portion between the rotor and the stator The magnetic resistance at is increased. Therefore, the torque of the rotating electrical machine may be reduced. For this reason, the rotating electrical machine described in Patent Document 1 has room for improvement in terms of torque improvement.

  An object of the present invention is to improve torque in an electromagnet type rotating electrical machine.

  The electromagnet type rotating electrical machine according to the present invention employs the following means in order to achieve the above object.

  An electromagnet type rotating electrical machine according to the present invention is an electromagnet type rotating electrical machine in which a stator and a rotor are arranged to face each other, and the stator includes a stator core, teeth disposed at a plurality of locations in the circumferential direction of the stator core, and at least the above A plurality of stator windings wound around the stator core or the teeth to generate a rotating magnetic field, and the rotor includes a rotor core, main salient poles arranged at a plurality of locations in the circumferential direction of the rotor core, and the main coils. A plurality of rotor windings wound around the salient poles, and a magnetic characteristic adjusting unit that alternately varies the magnetic characteristics generated in the plurality of main salient poles by the induced electromotive force generated in each rotor winding in the circumferential direction. An electromagnet type having a circumferential cross-sectional width on a distal end side of a main body portion of each main salient pole larger than a circumferential cross-sectional width on a root side of each main salient pole. It is a rolling electric. The "main salient pole body part" is the main salient pole, in the case where a circumferentially projecting flange for preventing the rotor winding from coming off is provided at the tip of the main salient pole, This refers to the portion excluding the collar (the same applies throughout the present specification and claims).

  According to the electromagnet type rotating electrical machine of the present invention, the circumferential cross-sectional width of the main body portion of each main salient pole of the rotor is larger than the circumferential cross-sectional width of the main salient pole on the base side. For this reason, in the gap part between the rotor and the stator, when the amount of magnetic flux passing therethrough is large in the part where the main salient pole of the rotor and the teeth of the stator are opposed in the radial direction, the magnetic resistance is substantially affected. The cross-sectional area of the part increases. Therefore, the magnetic resistance in the gap portion decreases, the amount of main magnetic flux acting on the rotor from the stator or from the stator to the rotor increases, and the torque of the rotating electrical machine can be improved. Moreover, since the cross-sectional width in the circumferential direction of the base side of each main salient pole of the rotor can be reduced, the cross-sectional area of the rotor winding wound around this base side can be increased, and copper loss can be reduced, so that further torque can be obtained. Can be improved.

  In the electromagnet-type rotating electrical machine according to the present invention, preferably, the plurality of rotor windings are wound around the front end side of each main salient pole to generate an induction current, and each main salient pole. And a common winding that is wound closer to the root side than the induction winding, is connected to the induction winding, and functions as an electromagnet.

  In the electromagnet-type rotating electrical machine according to the present invention, preferably, a cross-sectional width in a circumferential direction of a portion around each of the main salient poles around which the induction winding is wound is a circumference on a base side of each main salient pole. It is larger than the cross-sectional width in the direction.

  According to the above configuration, since the distance between the portion where the induction winding of the main salient pole is wound and the tip of the tooth is shortened, the magnetic resistance is reduced, and the induction winding acts from the stator to the induction winding. As a result, the induced magnetic flux, which is a magnetic flux linked to the magnetic flux, increases, and the torque can be further improved.

  Further, in the electromagnet type rotating electrical machine according to the present invention, preferably, a cross-sectional width in a circumferential direction of a portion around which the induction winding is wound among the main salient poles is the common among the main salient poles. The cross-sectional width in the circumferential direction of the portion where the winding is wound is larger.

  According to the said structure, the cross-sectional width of the circumferential direction of the part by which the common coil | winding was wound among the main salient poles can be made small. Also, the common winding has a greater influence of copper loss on the torque than the induction winding. For this reason, since the cross-sectional area of the common winding around the main salient pole can be increased, the copper loss can be reduced and the torque can be further improved.

  In the electromagnet-type rotating electrical machine according to the present invention, preferably, the rotor includes an auxiliary salient pole that protrudes from a circumferential side surface of each main salient pole and has magnetism, and the auxiliary salient pole out of the main salient poles. The cross-sectional width in the circumferential direction on the tip side from the portion where the salient pole is connected is larger than the cross-sectional width in the circumferential direction on the base side than the portion where the auxiliary salient pole is connected.

  According to the above configuration, since the auxiliary salient pole protruding from the circumferential side surface of each main salient pole and including magnetism is included, for example, by positioning the tip of the auxiliary salient pole radially outward from the root portion, The harmonic component included in the generated rotating magnetic field and interlinked with the rotor winding can be increased. For this reason, the change of the magnetic flux density of the magnetic flux linked to the rotor winding can be increased, and the induced current induced in the rotor winding can be increased. In addition, since the auxiliary salient pole is shortened, the magnetic resistance of the auxiliary salient pole is reduced, the induced magnetic flux induced from the auxiliary salient pole to the main salient pole is increased, and the induced current can be further increased. Further, the strength of the base portion of the auxiliary salient pole can be improved.

  In the electromagnet-type rotating electrical machine according to the present invention, preferably, each induction winding is connected to a rectifying element that is the magnetic characteristic adjusting unit, and the rectifying element is connected to each induction winding by generating an induced electromotive force. By rectifying the current flowing in the line, the phase of the current flowing in each induction winding adjacent in the circumferential direction is alternately changed between the A phase and the B phase.

  In the electromagnet-type rotating electrical machine according to the present invention, preferably, the rotor winding is the induction winding wound around the tip side of every other main salient pole in the circumferential direction among the plurality of main salient poles. A first induction winding that is a wire, and a second induction winding that is the induction winding wound on the tip side of another main salient pole adjacent to the main salient pole on which the first induction winding is wound. A wire, a first common winding that is the common winding wound around a base salient pole around which the first induction winding is wound, and a main wound around the second induction winding. A second common winding that is the common winding wound around the base of the salient pole, and the first induction winding and the second induction winding are opposite to each other in the magnetic characteristic adjusting unit. The first common winding and the second common winding are connected at a connection point via a rectifying element, and between the connection point and the first induction winding and the second induction winding. There common winding set is formed by being connected in series are connected.

  In the electromagnet-type rotating electrical machine according to the present invention, preferably, the width of each rotor winding in the circumferential direction of the rotor is shorter than a width corresponding to 180 ° in electrical angle.

  In the electromagnet-type rotating electrical machine according to the present invention, preferably, the width of each rotor winding in the circumferential direction of the rotor is equal to a width corresponding to an electrical angle of 90 °.

  According to the electromagnet type rotating electric machine of the present invention, torque can be improved.

In the electromagnet-type rotary electric machine of embodiment of this invention, it is a schematic sectional drawing which shows a circumferential direction part of a rotor and a stator. It is the A section enlarged view of FIG. In an embodiment of the present invention, it is a mimetic diagram showing signs that magnetic flux generated by induction current which flows into a rotor winding flows in a rotor, and is a mimetic diagram showing a diode connected to a rotor winding. In an embodiment of the invention, it is a figure showing an equivalent circuit of a connection circuit of two rotor windings wound around a main salient pole adjacent in the circumferential direction of a rotor. FIG. 4B is a diagram corresponding to FIG. 4A, showing another example in which the number of diodes connected to the rotor winding is reduced. It is a figure corresponding to Drawing 2 showing another example of a main salient pole. It is a figure which shows schematic structure of the rotary electric machine drive system which drives the electromagnet-type rotary electric machine of FIG. It is a schematic diagram for demonstrating the magnetic resistance in the gap part between the teeth of FIG. 2, and the main salient pole. In the electromagnet-type rotary electric machine of FIG. 1, it is a figure which shows the result of having calculated the amplitude of the linkage flux to a rotor winding, changing the width | variety (theta) of the rotor winding regarding the circumferential direction. It is a figure corresponding to FIG. 1 which shows the electromagnet-type rotary electric machine of a comparative example. In the electromagnet-type rotary electric machine of another embodiment of this invention, it is a figure corresponding to FIG. 2 which shows the 1st example of another example of an auxiliary salient pole. In the electromagnet-type rotary electric machine of another embodiment of this invention, it is a figure corresponding to the right side part of FIG. 2 which shows the 2nd example of another example of an auxiliary salient pole. In the electromagnet-type rotary electric machine of another embodiment of this invention, it is a figure corresponding to the right side part of FIG. 2 which shows the 3rd example of another example of an auxiliary salient pole. In the electromagnet-type rotary electric machine of another embodiment of this invention, it is a figure corresponding to the right side part of FIG. 2 which shows the 4th example of another example of an auxiliary salient pole. In the electromagnet-type rotary electric machine of another embodiment of this invention, it is a schematic sectional drawing which shows a circumferential direction part of a rotor and a stator. It is a figure corresponding to FIG. 14 which shows the electromagnet-type rotary electric machine of the 2nd example of a comparative example. In the electromagnet-type rotary electric machine of another embodiment of this invention, it is a schematic sectional drawing which shows a circumferential direction part of a rotor and a stator. It is the B section enlarged view of FIG. In the electromagnet-type rotary electric machine of another embodiment of this invention, it is a schematic sectional drawing which shows a circumferential direction part of a rotor and a stator. It is a figure corresponding to FIG. 3 which shows the electromagnet-type rotary electric machine of another embodiment of this invention.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 4A and 6 are diagrams showing an embodiment of the present invention. FIG. 1 is a schematic cross-sectional view showing a part of the rotor and the stator in the circumferential direction in the electromagnet-type rotating electrical machine of the present embodiment. FIG. 2 is an enlarged view of part A in FIG. FIG. 3 is a schematic diagram showing how the magnetic flux generated by the induced current flowing in the rotor winding flows in the rotor in the present embodiment, and is a schematic diagram showing a diode connected to the rotor winding. FIG. 4A is a diagram showing an equivalent circuit of a connection circuit of two rotor windings wound around main salient poles adjacent in the circumferential direction of the rotor in the present embodiment.

  As shown in FIG. 1, an electromagnet-type rotating electrical machine (hereinafter simply referred to as “rotating electrical machine”) 10 that functions as an electric motor or a generator includes a stator 12 fixed to a casing (not shown), a predetermined gap with the stator 12. And a rotor 14 that is opposed to the inner side in the radial direction and is rotatable with respect to the stator 12 (note that the “radial direction” simply refers to a radial direction perpendicular to the rotation center axis of the rotor). The same is true throughout and in the claims.)

  Further, the stator 12 includes a stator core 16 that is a stator yoke, teeth 18 that are disposed in the circumferential direction of the stator core 16, and a plurality of phases wound around each of the teeth 18, that is, more specifically, u. Stator windings 20u, 20v, and 20w of three phases (phase, v phase, and w phase). That is, a plurality of teeth 18 projecting radially inward (toward the rotor 14) are arranged on the inner peripheral surface of the stator core 16 at intervals from each other along the circumferential direction of the stator 12. A status lot 22 is formed between them. The stator core 16 and the plurality of teeth 18 are integrally provided with a magnetic material.

  The stator windings 20u, 20v, and 20w of each phase are wound around the teeth 18 through the status lot 22 in a concentrated manner with short nodes. As described above, the stator windings 20u, 20v, and 20w are wound around the teeth 18 to form a magnetic pole. Then, by passing a plurality of phases of alternating current through the plurality of stator windings 20u, 20v, and 20w, a plurality of teeth 18 arranged in the circumferential direction are magnetized, and a rotating magnetic field that rotates in the circumferential direction is generated in the stator 12. . That is, the stator windings 20u, 20v, and 20w having a plurality of phases generate a rotating magnetic field in the stator 12. Note that the stator winding is not limited to the configuration in which the stator winding is wound around the teeth 18 of the stator 12 as described above. It is also possible to generate a rotating magnetic field in the stator 12 by using a toroidal winding.

  The rotating magnetic field formed on the teeth 18 acts on the rotor 14 from the tip surface. In the example shown in FIG. 1, one pole pair is configured by three teeth 18 around which three-phase (u-phase, v-phase, and w-phase) stator windings 20u, 20v, and 20w are wound.

  On the other hand, the rotor 14 is a protrusion that is disposed to protrude radially outward (toward the stator 12) at a plurality of circumferentially equidistant locations on the outer surface of the rotor core 24 that is a cylindrical rotor yoke. A main salient pole 26 and a plurality of rotor windings 28n and 28s (referred to simply as “circumferential direction”, a direction along a circle drawn around the rotation center axis of the rotor). The same throughout the specification and claims). The rotor core 24 and the plurality of main salient poles 26 are integrally provided by a magnetic material such as a laminate in which a plurality of magnetic steel plates are laminated. More specifically, with respect to the circumferential direction of the rotor 14, every other main salient pole 26 is wound with a plurality of first rotor windings 28n by concentrated winding, and the first rotor winding 28n is wound around the main salient pole 26. A plurality of second rotor windings 28s are wound around the other main salient poles 26 adjacent to each other in the circumferential direction every other main salient pole 26 by concentrated winding.

  Further, as shown in FIGS. 1 to 3, each first rotor winding 28n includes a first induction winding 30 wound on the tip side (the upper end side in FIGS. 1 to 3) of the main salient pole 26, And a first common winding 32 connected to the first induction winding 30. The first common winding 32 is wound on the base side (the lower end side in FIGS. 1 to 3) of the first induction winding 30 at the main salient pole 26 around which the first induction winding 30 is wound. Each of the second rotor windings 28s has a second induction winding wound around the tip of another main salient pole 26 adjacent to the main salient pole 26 around which the first rotor winding 28n is wound in the circumferential direction. 34 and a second common winding 36 connected to the second induction winding 34. The second common winding 36 is wound closer to the root side than the second induction winding 34 in the main salient pole 26 around which the second induction winding 34 is wound. In the example shown in FIGS. 1 and 2, the induction windings 30 and 34 and the common windings 32 and 36 wound around each main salient pole 26 are respectively in the length direction around the main salient pole 26 ( Solenoids provided along the vertical direction in FIG. 1 are arranged in an aligned winding in which a plurality of layers are aligned in the circumferential direction of the main salient pole 26 (left-right direction in FIG. 2). In addition, the induction windings 30 and 34 wound around the front end side of each main salient pole 26 may be configured to be wound around the main salient pole 26 a plurality of times, that is, a plurality of turns in a spiral shape. 1 and 2, the induction windings 30 and 34 are indicated by black circles, and the common windings 32 and 36 are indicated by white circles (the same applies to FIGS. 9, 14 and 15 described later).

  As shown in FIG. 3, two main salient poles 26 adjacent to each other in the circumferential direction of the rotor 14 are taken as one set, and one end of a first induction winding 30 wound around one main salient pole 26 in each set, Then, one end of a second induction winding 34 wound around another main salient pole 26 is connected via two first diodes 38 and a second diode 40 which are two magnetic characteristic adjusting units and rectifiers. Yes. That is, FIG. 4A shows an equivalent circuit of a connection circuit of two rotor windings 28n and 28s wound around main salient poles 26 adjacent to each other in the circumferential direction of the rotor 14 (FIG. 4A) in the present embodiment. FIG. As shown in FIG. 4A, one end of the first induction winding 30 and the second induction winding 34 is connected at a connection point R via a first diode 38 and a second diode 40 whose forward directions are opposite to each other. ing.

  Also, as shown in FIGS. 3 and 4A, one end of the first common winding 32 wound around one main salient pole 26 in each set is a second common winding wound around another main salient pole 26. Connected to one end of line 36. The first common winding 32 and the second common winding 36 are connected in series to form a common winding set 42. Further, the other end of the first common winding 32 is connected to the connection point R, and the other end of the second common winding 36 is opposite to the connection point R of the first induction winding 30 and the second induction winding 34. Is connected to the other end. Further, the winding central axes of the induction windings 30 and 34 and the common windings 32 and 36 of the rotor windings 28n and 28s coincide with the radial direction of the rotor 14 (FIG. 1). The induction windings 30 and 34 and the common windings 32 and 36 are wound around the corresponding main salient poles 26 via an insulating insulator (not shown) made of resin or the like. You can also.

  In such a configuration, as will be described later, the rectified current flows through the first induction winding 30, the second induction winding 34, the first common winding 32, and the second common winding 36, thereby causing the main salient pole. 26 is magnetized and functions as a magnetic pole part. Returning to FIG. 1, the stator 12 generates a rotating magnetic field by passing an alternating current through the stator windings 20u, 20v, and 20w. This rotating magnetic field is not only a fundamental wave component but also a fundamental wave. It contains a higher order harmonic component magnetic field.

  More specifically, the distribution of the magnetomotive force that generates the rotating magnetic field in the stator 12 is caused by the arrangement of the stator windings 20u, 20v, 20w of each phase and the shape of the stator core 16 by the teeth 18 and the status lot 22 ( It does not have a sinusoidal distribution (of the fundamental wave only) and includes harmonic components. In particular, in the concentrated winding, the stator windings 20u, 20v, 20w of the respective phases do not overlap each other, so that the amplitude level of the harmonic component generated in the magnetomotive force distribution of the stator 12 increases. For example, when the stator windings 20u, 20v, and 20w are three-phase concentrated windings, the harmonic component is a temporal third-order component of the input electrical frequency, and the amplitude level of the spatial second-order component increases. The harmonic components generated in the magnetomotive force due to the arrangement of the stator windings 20u, 20v, 20w and the shape of the stator core 16 are called spatial harmonics.

  When a rotating magnetic field including this space-emphasized wave component acts on the rotor 14 from the stator 12, the fluctuation of the leakage magnetic flux leaking into the space between the main salient poles 26 of the rotor 14 is generated due to the fluctuation of the spatial harmonic magnetic flux. Thus, an induced electromotive force is generated in at least one of the induction windings 30 and 34 shown in FIG. In addition, the induction windings 30 and 34 on the front end side of the main salient pole 26 near the stator 12 mainly have a function of generating an induction current, and the common windings 32 and 36 far from the stator 12 are mainly used. The main salient pole 26 has a function of magnetizing, that is, functions as an electromagnet. Further, as understood from the equivalent circuit of FIG. 4A, the total current flowing through the induction windings 30 and 34 wound around the adjacent main salient poles 26 (FIGS. 1 to 3) is the common windings 32 and 36. The currents that flow through Further, since the adjacent common windings 32 and 36 are connected in series, the same effect can be obtained as when the number of turns is increased in both, and the magnetic flux flowing through each main salient pole 26 remains the same. The current flowing through each common winding 32, 36 can be reduced.

  When an induced electromotive force is generated in each induction winding 30, 34, diodes 38, 40 are connected to the first induction winding 30, the second induction winding 34, the first common winding 32, and the second common winding 36. A direct current corresponding to the commutation direction flows, and the main salient pole 26 around which the rotor windings 28n and 28s are wound is magnetized, so that the main salient pole 26 functions as a magnetic pole portion that is a magnet with a fixed magnetic pole. . The winding directions of the first rotor winding 28n and the second rotor winding 28s adjacent to each other in the circumferential direction shown in FIG. 3 are reversed, and the magnetization directions are reversed between the main salient poles 26 adjacent to each other in the circumferential direction. Become. In the illustrated example, an N pole is generated at the tip of the main salient pole 26 around which the first rotor winding 28n is wound, and an S pole is at the tip of the main salient pole 26 around which the second rotor winding 28s is wound. It is generated. For this reason, the N pole and the S pole are alternately arranged in the circumferential direction of the rotor 14. Each diode 38, 40 (FIG. 3) has a magnetic characteristic generated in the plurality of main salient poles 26 by the induced electromotive force generated in the plurality of rotor windings 28n, 28s wound around the main salient poles 26. The direction is changed alternately.

  The diodes 38 and 40 are connected to the corresponding induction windings 30 and 34, and the induction coils 30 and 34 are generated by the induction electromotive force generated by the rotating magnetic field including the spatial harmonics generated by the stator 12. By rectifying the current flowing through the rotor 14, the phases of the current flowing through the induction windings 30 and 34 adjacent to each other in the circumferential direction of the rotor 14 are alternately changed between the A phase and the B phase. The A phase generates an N pole on the tip side of the corresponding main salient pole 26, and the B phase generates an S pole on the tip side of the corresponding main salient pole 26.

  Further, as shown in FIG. 1, the width θ of each induction winding 30, 34 and each common winding 32, 36 in the circumferential direction of the rotor 14 is shorter than the width corresponding to 180 ° in terms of the electrical angle of the rotor 14. The induction windings 30 and 34 and the common windings 32 and 36 are wound around the main salient pole 26 with a short-pitch winding. More preferably, the width θ of each induction winding 30, 34 and each common winding 32, 36 in the circumferential direction of the rotor 14 is equal to or substantially equal to a width corresponding to 90 ° in electrical angle of the rotor 14. Yes. The width θ of each induction winding 30, 34 and each common winding 32, 36 here is determined in consideration of the cross-sectional area of each induction winding 30, 34 and each common winding 32, 36. It can be represented by the center width of the cross section of the lines 30 and 34 and the common windings 32 and 36. That is, the widths of the induction windings 30 and 34 and the common windings 32 and 36 are average values of the widths of the inner and outer peripheral surfaces of the induction windings 30 and 34 and the common windings 32 and 36. θ can be expressed. The electrical angle of the rotor 14 is represented by a value obtained by multiplying the mechanical angle of the rotor 14 by the number of pole pairs p of the rotor 14 (electrical angle = mechanical angle × p). Therefore, the width θ of each induction winding 30, 34 and each common winding 32, 36 in the circumferential direction is from the rotation center axis of the rotor 14 to each induction winding 30, 34 and each common winding 32, 36. When the distance is r, the following expression (1) is satisfied.

θ <π × r / p (1)
The reason why the width θ is regulated in this way will be described in detail later.

  In particular, in the present embodiment, the rotor 14 includes auxiliary salient poles 44 that project from both side surfaces in the circumferential direction of the main salient poles 26 arranged at a plurality of locations in the circumferential direction. The auxiliary salient poles 44 are provided on both side surfaces of the main salient pole 26 in the circumferential direction, between the first induction winding 30 and the first common winding 32, and between the second induction winding 34 and the second common winding 36. A plate-like magnetic body that protrudes in a direction inclined with respect to the circumferential direction over substantially the entire length of the main salient pole 26 in the axial direction (front and back directions in FIGS. 1 and 2). The auxiliary salient poles 44 adjacent in the circumferential direction in the rotor slots 46 (FIGS. 1 and 2) formed between the main salient poles 26 adjacent in the circumferential direction of the rotor 14 They are connected to each other by a connecting portion 78 and are integrally formed. The auxiliary salient pole 44 has magnetism including the coupling portion 78. That is, the auxiliary salient pole 44 is magnetically connected to the main salient pole 26. For example, in the illustrated example, the auxiliary salient poles 44 are coupled to the outer side in the radial direction (vertical direction in FIG. 2) on both sides in the circumferential direction of each main salient pole 26, and adjacent to the circumferential direction that is the tip. The protrusion protrudes in a direction inclined with respect to the circumferential direction so as to be radially outward of the rotor 14 toward the coupling portion 78 with respect to another auxiliary salient pole 44 that matches. For this reason, the coupling portion 78 of each auxiliary salient pole 44 with respect to another adjacent auxiliary salient pole 44 is located on the radially outer side of the rotor 14 with respect to the root of the auxiliary salient pole 44. Further, the width of each auxiliary salient pole 44 is made substantially the same, being larger at the root portion and smaller than the width of the root portion from the intermediate portion to the tip portion. In addition, the induction windings 30 and 34 are arranged in the radially outer space among the spaces partitioned by the auxiliary salient poles 44 in the corresponding rotor slot 46 to the radially outer side and the inner side. , 36 are arranged in the radially inner space among the spaces partitioned by the auxiliary salient poles 44 in the corresponding rotor slot 46 radially outward and inward.

  Further, in the rotor 14, the circumferential cross-sectional width on the distal end side of the main body portion of each main salient pole 26, that is, the circumferential width W 1 (FIG. 2) when cut in the circumferential direction is the main salient pole 26. It is made larger than the cross-sectional width W2 in the circumferential direction on the root side (W1> W2). More specifically, in the main salient pole 26, the auxiliary salient pole 44 is connected to the circumferential salient width W1 in the circumferential direction on the tip side of the portion to which the auxiliary salient pole 44 is connected. It is larger than the cross-sectional width W2 in the circumferential direction on the base side than the portion. Although FIG. 2 shows the main salient pole 26 serving as the N pole, even in the main salient pole 26 serving as the S pole, the circumferential sectional width on the tip side of the main body portion is larger than the circumferential sectional width on the root side. It is getting bigger.

  In addition, the circumferential cross-sectional width W1 of the portion where the induction windings 30 and 34 are wound in each main salient pole 26 is the portion of each main salient pole 26 where the common windings 32 and 36 are wound. It is larger than a certain section width W2 in the circumferential direction on the root side.

  Further, as shown in FIG. 1, auxiliary salient poles 44 project from circumferential side surfaces of adjacent main salient poles 26 that face each other. The auxiliary salient pole 44 can be formed of the same magnetic material as the rotor core 24 and the main salient pole 26. For example, the rotor core 24, the main salient poles 26, and the auxiliary salient poles 44 can be integrally formed by a laminate configured by laminating a plurality of magnetic steel plates in the axial direction.

  Further, the induction windings 30 and 34 and the common windings 32 and 36 wound around the same main salient pole 26 are auxiliary ones such as one or both coil end sides (not shown) provided outside the axial end surface of the rotor core 24. They are connected to each other at a portion away from the salient pole 44. The induction windings 30 and 34 and the common windings 32 and 36 can be formed of different materials. For example, each of the common windings 32 and 36 is formed of a conductive material such as copper wire, and each of the induction windings 30 and 34 is lighter than the conductive material constituting the common winding such as aluminum or aluminum alloy. It can also be formed of another conductive material.

  In addition, like another example of the main salient pole 26 shown in FIG. 5, a flange portion 48 projecting on both sides in the circumferential direction is formed at the tip end portion of each main salient pole 26, and the induction windings 30 and 34 (34 is a figure). (See 1 etc.). When the flanges 48 are provided on the main salient poles 26 in this way, in the portion excluding the flanges 48 of the main salient poles 26, which is the main body part of each main salient pole 26, the circumferential cross-sectional width W1 on the tip side is The width of the cross section in the circumferential direction on the root side is made larger (W1> W2).

  Such a rotating electrical machine 10 is driven by the rotating electrical machine drive system 50 of FIG. FIG. 6 is a diagram showing a schematic configuration of a rotating electrical machine drive system 50 that drives the rotating electrical machine 10 of FIG. The rotating electrical machine drive system 50 includes the rotating electrical machine 10, an inverter 52 that is a drive unit that drives the rotating electrical machine 10, a control device 54 that controls the inverter 52, and a power storage device 56 that is a power supply unit. Drive.

  The power storage device 56 is provided as a direct current power source and is chargeable / dischargeable, and is constituted by, for example, a secondary battery. The inverter 52 includes U-phase, V-phase, and W-phase three-phase arms Au, Av, and Aw, and each phase arm Au, Av, and Aw has two switching elements Sw connected in series. The switching element Sw is a transistor, an IGBT, or the like. A diode Di is connected in antiparallel to each switching element Sw. The midpoint of each arm Au, Av, Aw is connected to one end side of the corresponding phase stator windings 20u, 20v, 20w constituting the rotating electrical machine 10. In the stator windings 20u, 20v, and 20w, stator windings of the same phase are connected in series with each other, and stator windings 20u, 20v, and 20w of different phases are connected at a neutral point.

  Further, the positive electrode side and the negative electrode side of the power storage device 56 are respectively connected to the positive electrode side and the negative electrode side of the inverter 52, and a capacitor 58 is connected in parallel to the inverter 52 between the power storage device 56 and the inverter 52. Has been. The control device 54 calculates a torque target of the rotating electrical machine 10 according to an acceleration command signal input from, for example, an accelerator pedal sensor (not shown) of the vehicle, for example, and each according to a current command value according to the torque target or the like. The switching operation of the switching element Sw is controlled. The control device 54 includes a signal representing a current value detected by a current sensor 60 provided on the stator winding (for example, 20u, 20v) side of at least two phases of the three phases, and a rotation angle detection unit such as a resolver. A signal indicating the rotation angle of the rotor 14 (FIG. 1) of the rotating electrical machine 10 detected by (not shown) is input. The control device 54 includes a microcomputer having a CPU, a memory, and the like, and controls the torque of the rotating electrical machine 10 by controlling the switching of the switching element Sw of the inverter 52. The control device 54 can also be configured by a plurality of control devices divided for each function.

  Such a control device 54 converts the DC power from the power storage device 56 into three-phase AC power of u-phase, v-phase, and w-phase by the switching operation of each switching element Sw constituting the inverter 52, and It is possible to supply electric power of a phase corresponding to each phase of the windings 20u, 20v, and 20w. The rotating electrical machine drive system 50 is used, for example, as a vehicular travel power generator mounted on a hybrid vehicle, a fuel cell vehicle, an electric vehicle or the like that includes an engine and a travel motor as drive sources. Note that a DC / DC converter that is a voltage conversion unit may be connected between the power storage device 56 and the inverter 52 so that the voltage of the power storage device 56 can be boosted and supplied to the inverter 52.

  In the rotating electrical machine 10 described above, a rotating magnetic field (fundamental wave component) formed in the teeth 18 is applied to the rotor 14 by passing a three-phase alternating current through the three-phase stator windings 20u, 20v, and 20w. Accordingly, the main salient pole 26 is attracted to the rotating magnetic field of the teeth 18 so that the magnetic resistance of the rotor 14 is reduced. As a result, torque (reluctance torque) acts on the rotor 14.

  Further, when the rotating magnetic field including the spatial harmonic component formed in the teeth 18 is linked to the induction windings 30 and 34 of the rotor windings 28n and 28s of the rotor 14, the induction windings 30 and 34 have a space. An induced electromotive force is generated in each of the rotor windings 28n and 28s due to a magnetic flux fluctuation having a frequency different from the rotation frequency of the rotor 14 (fundamental wave component of the rotating magnetic field) caused by the harmonic component. The current flowing through each of the rotor windings 28n and 28s along with the generation of the induced electromotive force is rectified by the respective diodes 38 and 40 to be unidirectional (direct current). The main salient poles 26 are magnetized in accordance with the direct current rectified by the diodes 38 and 40 flowing into the rotor windings 28n and 28s, so that the main salient poles 26 have magnetic poles (N poles). It functions as a fixed magnet).

  For example, as shown in FIGS. 1 and 2, each of the teeth 18 around which the stator windings 20u, 20v, 20w of each phase of the stator 12 are wound is the main salient pole 26 around which the rotor windings 28n, 28s are wound. The two main salient poles 26 adjacent to each other in the circumferential direction of the rotor 14 are at least one tooth 18 (the tooth 18 at the position P in FIG. 1). Consider the case of facing the center position between. Further, in this state, as indicated by an arrow Q in FIG. 2, the q-axis which is a magnetic flux of spatial second-order spatial harmonics as a magnetomotive force of the stator 12 from the U-phase teeth 18 of the stator 12 to the rotor 14. Consider the case where magnetic flux (inductive magnetic flux) flows. The induced magnetic flux Q also flows from the U-phase tooth 18 to the main salient pole (not shown) on the right side of FIG. 2 via the auxiliary salient pole 44 on the right side of FIG. In this case, the presence of the auxiliary salient pole 44 induces a large amount of spatial harmonics from the teeth 18 (in the U phase in FIG. 2) of the stator 12 to the main salient pole 26 via the auxiliary salient pole 44. 2 to the other teeth 18 (the V phase in FIG. 2 and the W phase not shown in FIG. 2), a large amount of magnetic flux can be linked to the induction windings 30 and 34. FIG. 2 shows a state corresponding to the phase angle at which the maximum q-axis magnetic flux flows from one tooth 18, and the direction and magnitude of the q-axis magnetic flux change in one electrical cycle. In this case, the second diode 40 (FIG. 3) is connected to the second induction winding 34 wound around the main salient pole 26 which is not shown in FIG. Current is passed in a direction in which 26 is the south pole. For this reason, the second induction winding 34 wound around the main salient pole 26 on the S pole side tries to flow a magnetic flux in the direction of the S pole as the N pole by the q-axis magnetic flux, and the second induction winding in a direction that prevents this. An induced current tends to flow through the line 34, and the flow is not hindered by the second diode 40. As a result, as indicated by an arrow M in FIG. 2, a main magnetic flux that is a magnetic flux caused by an induced current flows through the main salient pole 26. In some cases, the q-axis magnetic flux tends to flow from the teeth 18 of the stator 12 to the auxiliary salient poles 44 through the N-pole main salient poles 26. Is about to flow, an induced current tends to flow through the first induction winding 30 wound around the N-pole main salient pole 26 in a direction that prevents this. In this case, the first diode 38 (FIG. 3) connected to the first induction winding 30 causes a current to flow in the direction in which the corresponding main salient pole 26 is the N pole. Also in this case, as indicated by the arrow M in FIG. For this reason, each main salient pole 26 is magnetized to N pole or S pole. As described above, since the auxiliary salient poles 44 protrude from both side surfaces of each main salient pole 26, there is no auxiliary salient pole 44, that is, a space between the main salient poles 26 adjacent in the circumferential direction in each slot 46. Compared with the case where there is only one, the maximum value of the amplitude of the magnetic flux interlinking with each induction winding 30 and 34 can be increased, so that the change of the interlinkage magnetic flux can be increased.

  Then, the magnetic field of each main salient pole 26 (magnet with a fixed magnetic pole) interacts with the rotating magnetic field (fundamental wave component) generated by the stator 12, thereby causing attraction and repulsion. Torque (torque corresponding to magnet torque) is also applied to the rotor 14 by electromagnetic interaction (attraction and repulsion) between the rotating magnetic field (fundamental wave component) generated by the stator 12 and the magnetic field of the main salient pole 26 (magnet). The rotor 14 is driven to rotate in synchronization with the rotating magnetic field (fundamental wave component) generated by the stator 12. As described above, the rotating electrical machine 10 can function as an electric motor that generates power (mechanical power) in the rotor 14 by using power supplied to the stator windings 20u, 20v, and 20w.

  Further, since the phases of the induced current flowing through the first induction winding 30 and the induced current flowing through the second induction winding 34 are out of phase, the phases of the first induction winding 30 and the second induction winding 34 are out of phase. Half-wave rectification is generated. On the other hand, the first common winding 32 and the second common winding 36 have a current having the magnitude of the sum of the currents flowing through the first induction winding 30 and the second induction winding 34. For example, a large direct current flows continuously. For this reason, it becomes easy to form a magnetic pole in each main salient pole 26, and the torque of the rotor 14 can be increased.

  Moreover, according to the rotating electrical machine 10 of the present embodiment, the circumferential cross-sectional width W1 (FIG. 2) of the main body portion of each main salient pole 26 of the rotor 14 is the root side of each main salient pole 26. It is larger than the circumferential cross-sectional width W2 (FIG. 2) (W1> W2). For this reason, in the gap part G (FIG. 2) between the rotor 14 and the stator 12, the amount of magnetic flux passing through the portion where the main salient pole 26 of the rotor 14 and the tooth 18 of the stator 12 face each other in the radial direction is small. In many cases, the opposing cross-sectional area of the portion that substantially affects the magnetoresistance increases. This opposing cross-sectional area is the same as the opposing area of the main salient pole 26 and the tooth 18 whose width in the circumferential direction is defined by the arrow S in FIG. Therefore, the magnetic resistance in the gap part G is lowered.

  This will be described in detail with reference to FIG. FIG. 7 is a schematic diagram for explaining the magnetic resistance in the gap portion G between the tooth 18 and the main salient pole 26 of FIG. As shown in FIG. 7, the magnetic resistance of the gap part G is Rm, the gap length is g, and the opposing area defined by the arrow S, which is the opposing cross-sectional area at the gap part G, is Sa. Then, the magnetic resistance Rm is expressed by the following equation.

Rm = μ0 × g / Sa (2)
Here, μ0 is a constant vacuum permeability. In addition, an arrow Q in FIG. 7 represents a magnetic flux line.

  Therefore, as is clear from the equation (2), the circumferential cross-sectional width W1 (FIG. 2) on the tip side of the main salient pole 26 is large, and the circumferential width S of the opposed cross-sectional area of the gap portion G is large. Thus, the magnetoresistance Rm can be reduced by increasing the opposing sectional area Sa. As a result, the amount of magnetic flux of the main magnetic flux acting from the rotor 14 to the stator 12 or from the stator 12 to the rotor 14 is increased, and the torque of the rotating electrical machine 10 (FIG. 1) can be improved. Moreover, since the cross-sectional width W2 (FIG. 2) in the circumferential direction on the base side of each main salient pole 26 of the rotor 14 can be reduced, the common windings 32 and 36 (rotor windings wound around the base side) ( Since the cross-sectional area of FIG. 1) can be increased and the copper loss can be reduced, the torque of the rotating electrical machine 10 can be further improved.

  On the other hand, FIG. 9 is a view corresponding to FIG. 1 showing a rotating electrical machine 10 of a comparative example. In the comparative example shown in FIG. 9, in the same configuration as the embodiment shown in FIGS. 1 to 4 and FIG. 6, the flange portion 48 is formed at the tip of each main salient pole 26 as in the configuration of FIG. 5. Of the main salient poles 26, the cross-sectional width in the circumferential direction of the main body portion excluding the flange portion 48 is the same over the entire length. For this reason, the cross-sectional width W1 on the front end side of the main body portion of each main salient pole 26 is the same as the cross-sectional width W2 on the root side. In such a comparative example, in the gap portion between the rotor 14 and the stator 12, the amount of magnetic flux passing therethrough is large in the portion where the main salient pole 26 of the rotor 14 and the tooth 18 of the stator 12 face each other in the radial direction. In this case, the cross-sectional area in the circumferential direction of the portion where the main body portion of the main salient pole 26 and the tip of the tooth 18 overlap in the radial direction, which is the opposing cross-sectional area of the portion that substantially affects the magnetic resistance, decreases. As for the opposed cross-sectional area, the width in the circumferential direction is defined by the arrow S in FIG. 9, but since the cross-sectional width W1 is small, the circumferential width S of the opposed cross-sectional area is also reduced, and the opposed cross-sectional area is reduced. For this reason, as apparent from the above equation (2), the magnetic resistance Rm of the gap portion increases. As a result, in the rotating electrical machine 10 of the comparative example, there is a possibility that the torque is reduced.

  On the other hand, in the comparative example of FIG. 9, it is also possible to increase the overall circumferential width of the main salient pole 26 while keeping the cross-sectional widths W1 and W2 the same, and to increase the cross-sectional widths W1 and W2, respectively. In this case, the arrangement space of the common windings 32 and 36 is reduced, and the cross-sectional area of the common windings 32 and 36 is reduced, so that the copper loss increases and the torque of the rotating electrical machine 10 decreases. there's a possibility that. According to the above embodiment, such inconvenience can be solved and the torque of the rotating electrical machine 10 can be improved.

  Further, as in the embodiment shown in FIG. 5, when the flange portion 48 is provided at the distal end portion of the main salient pole 26, the sectional width W1 on the distal end side of the main body portion of the main salient pole 26 is increased. When the amount of magnetic flux passing through the gap portion G is large, the cross-sectional area of the portion that substantially affects the magnetic resistance is substantially opposite, and the circumferential width is defined by the arrow S in FIG. The area increases. Therefore, the magnetic resistance in the gap portion G is reduced, and the torque of the rotating electrical machine 10 can be improved. In this case, the flange portion 48 on one side (left side in FIG. 5) also faces the teeth 18, but when the amount of magnetic flux is large, magnetic flux saturation occurs in the flange portion 48, and the flange portion 48 does not affect the increase in torque. However, if the amount of magnetic flux passing through the gap portion G is relatively small, the flange portion 48 contributes to an increase in torque, and further torque improvement can be achieved. Moreover, since the induction winding 30 having a large cross-sectional area can be disposed around the portion having the cross-sectional width W1 on the tip side of the main salient pole 26 in the radial direction (lower side in FIG. 5) from the flange portion 48, the loss The effect that reduction can be achieved is also obtained.

  Furthermore, in the above embodiment, the circumferential cross-sectional width W1 of each main salient pole 26 where the induction windings 30 and 34 are wound is equal to the circumferential cross-sectional width on the base side of each main salient pole 26. Greater than W2. For this reason, since the distance La (FIG. 2) between the portion where the induction windings 30 and 34 of the main salient pole 26 are wound and the tip of the tooth 18 is shortened, the magnetic resistance is reduced and induction winding from the stator 12 is performed. The induction magnetic flux acting on the wires 30 and 34 and interlinking with the induction windings 30 and 34 is increased, and the torque of the rotating electrical machine 10 can be further improved.

  In addition, the circumferential cross-sectional width W1 of each main salient pole 26 around which the induction windings 30 and 34 are wound is equal to that of each main salient pole 26 where the common windings 32 and 36 are wound. It is larger than the cross-sectional width W2 in the circumferential direction. For this reason, the cross-sectional width W2 of the circumferential direction of the part by which the common windings 32 and 36 were wound among the main salient poles 26 can be made small. Further, the common windings 32 and 36 have a greater influence of copper loss on the torque than the induction windings 30 and 34. For this reason, since the cross-sectional area of the common windings 32 and 36 around the main salient pole 26 can be increased, the copper loss can be reduced and the torque can be further improved.

  In addition, the rotor 14 protrudes from the circumferential side surface of each main salient pole 26, and includes an auxiliary salient pole 44 having magnetism. Of the main salient poles 26, the rotor 14 is located on the tip side of the portion to which the auxiliary salient pole 44 is connected. The cross-sectional width W1 in the circumferential direction is larger than the cross-sectional width W2 in the circumferential direction on the base side than the portion to which the auxiliary salient pole 44 is connected. For this reason, for example, as in the present embodiment, the tip of the auxiliary salient pole is positioned radially outside the root portion, thereby being included in the rotating magnetic field generated by the stator 12, and the rotor windings 28n, The harmonic component interlinked with 28 s, for example, the time third order and the spatial second order harmonic component can be effectively increased by the auxiliary salient pole 44. For this reason, the change in the magnetic flux density of the magnetic flux interlinking with the rotor windings 28n and 28s can be increased, and the induced current induced in the rotor windings 28n and 28s can be increased. For example, many magnetic fluxes of harmonic components of the magnetomotive force distribution generated in the stator 12 are guided from the teeth 18 of the stator 12 to the main salient poles 26 via the auxiliary salient poles 44, and much in the rotor windings 28n and 28s. The magnetic flux can be interlinked. It is also possible to induce a large amount of magnetic flux of harmonic components from the tooth 18 to the auxiliary salient pole 44 via the main salient pole 26, and to link a lot of magnetic flux to the rotor windings 28n and 28s. In addition, since the length Lb (FIG. 2) of the auxiliary salient pole 44 is shortened, the magnetic resistance of the auxiliary salient pole 44 is reduced, and the induced magnetic flux induced from the auxiliary salient pole 44 to the main salient pole 26 is increased to further induce. The current can be increased, and the torque of the rotating electrical machine 10 can be further improved. Further, since the width of the base portion of the auxiliary salient pole 44 can be increased and the length Lb of the auxiliary salient pole 44 can be shortened, the strength of the base portion of the auxiliary salient pole 44 can be improved. For this reason, it is possible to make the auxiliary salient pole 44 thinner while ensuring the strength.

  The rotor windings 28n and 28s are connected to the induction windings 30 and 34 by being wound around the induction windings 30 and 34 wound around the front end side of the main salient pole 26 and the base side of the main salient pole 26. The induction windings 30 and 34 are arranged in a radially outer space of the space partitioned by the auxiliary salient poles 44 in the rotor slot 46, and the common windings 32 and 36 The lot 46 is disposed in the radially inner space of the space partitioned by the auxiliary salient poles 44. For this reason, among the induction windings 30 and 34 and the common windings 32 and 36, most of the fluctuation magnetic flux is linked only to the induction windings 30 and 34, and the induced current generated in the induction windings 30 and 34 is reduced. Can be increased. Therefore, while reducing the number of turns of the induction windings 30 and 34, the induction windings 30 and 34 can effectively exhibit a function of mainly generating an induction current, and the number of turns of the common windings 32 and 36 can be reduced. As a result, the common windings 32 and 36 can effectively exhibit the function of mainly magnetizing the main salient pole 26. That is, even if the number of turns of the induction windings 30 and 34 is reduced, the number of turns necessary to obtain a desired induction current can be secured, and the number of turns of the common windings 32 and 36 can be reduced by the reduced number of turns. I can do more. As a result, it becomes easy to form an electromagnet on the main salient pole 26, the rotor magnetic force is increased, and the torque of the rotating electrical machine 10 can be improved without increasing the size of the rotating electrical machine 10. Moreover, since it can suppress that many magnetic fluxes link with the common windings 32 and 36, a loss can be reduced. Further, since a desired torque can be obtained even if the stator current passed through the stator windings 20u, 20v, and 20w is reduced, copper loss can be reduced and efficiency can be improved. As a result, the torque and efficiency of the rotating electrical machine 10 can be improved.

  Further, the auxiliary salient poles 44 adjacent in the circumferential direction in the rotor slots 46 arranged between the main salient poles 26 adjacent in the circumferential direction of the rotor 14 are connected in the rotor slot 46. Further, the common windings 32 and 36 are disposed radially inward of the auxiliary salient pole 44. For this reason, the holding | maintenance intensity | strength with respect to the centrifugal force of the common windings 32 and 36 at the time of rotor 14 rotation can be improved. That is, unlike the present embodiment, when the auxiliary salient poles adjacent to each other in the circumferential direction are separated in the rotor slot 46, if the strength of the auxiliary salient poles is small, the action of the centrifugal force during the rotation of the rotor 14 Therefore, it cannot be said that there is no possibility that the common windings 32 and 36 push the auxiliary salient poles radially outward and displace radially outward. On the other hand, since the auxiliary salient poles 44 are connected in the present embodiment, such inconvenience can be eliminated and the holding strength of the rotor windings 28n and 28s can be improved. Further, it is not necessary to provide a fixing portion for the common windings 32 and 36 in a portion different from the auxiliary salient pole 44.

  In addition, the coupling portion 78 that is the tip of each auxiliary salient pole 44 is positioned on the outer side in the radial direction of the rotor 14 with respect to the base of the auxiliary salient pole 44, so that depending on the position of the coupling portion 78 of each auxiliary salient pole 44. Then, the magnetic flux component necessary for the space harmonic is efficiently guided from the auxiliary salient poles 44 to the main salient poles 26, and a large amount of magnetic flux is efficiently linked to the rotor windings 28n and 28s. In addition, the efficiency can be improved more effectively.

  Further, in the present embodiment, the width θ in the circumferential direction of the rotor 14 is regulated in each rotor winding 28n, 28s as described in the above equation (1). For this reason, the induced electromotive force due to the spatial harmonics of the rotating magnetic field generated in the rotor windings 28n and 28s can be increased. That is, the amplitude (variation width) of the interlinkage magnetic flux to the rotor windings 28n and 28s due to the spatial harmonics is affected by the width θ of the rotor windings 28n and 28s in the circumferential direction. Here, FIG. 8 shows a result of calculating the amplitude (variation width) of the interlinkage magnetic flux to the rotor windings 28n and 28s while changing the width θ of the rotor windings 28n and 28s in the circumferential direction. In FIG. 8, the coil width θ is shown in terms of electrical angle. As shown in FIG. 8, the fluctuation width of the linkage flux to the rotor windings 28n and 28s increases as the coil width θ decreases from 180 °, so the coil width θ is made smaller than 180 °. By setting the rotor windings 28n and 28s to short-pitch windings, it is possible to increase the amplitude of the interlinkage magnetic flux due to spatial harmonics compared to full-pitch windings.

  Therefore, in the rotating electrical machine 10 (FIG. 1), the width of each main salient pole 26 in the circumferential direction is made smaller than the width corresponding to 180 ° in electrical angle, and the rotor windings 28 n and 28 s are shorted to each main salient pole 26. By winding with the node winding, the induced electromotive force due to the spatial harmonics generated in the rotor windings 28n and 28s can be efficiently increased. As a result, the torque acting on the rotor 14 can be increased efficiently.

  Furthermore, as shown in FIG. 8, when the coil width θ is 90 °, the amplitude of the interlinkage magnetic flux due to the spatial harmonics is maximized. Therefore, in order to further increase the amplitude of the interlinkage magnetic flux to the rotor windings 28n and 28s due to the spatial harmonics, the width θ of each rotor winding 28n and 28s in the circumferential direction is 90 ° in terms of the electrical angle of the rotor 14. It is preferably equal (or nearly equal) to the corresponding width. Therefore, when the number of pole pairs of the rotor 14 is p and the distance from the rotation center axis of the rotor 14 to the rotor windings 28n, 28s is r, the width θ of each rotor winding 28n, 28s in the circumferential direction is It is preferable that the following expression (3) is satisfied (or substantially satisfied).

  θ = π × r / (2 × p) (3)

  By doing so, the induced electromotive force due to the spatial harmonics generated in the rotor windings 28n and 28s can be maximized, and the magnetic flux generated in each main salient pole 26 by the induced current can be increased most efficiently. Can do. As a result, the torque acting on the rotor 14 can be increased more efficiently. That is, when the width θ greatly exceeds the width corresponding to 90 °, the magnetomotive forces in the direction of canceling each other easily interlink with the rotor windings 28n and 28s, but smaller than the width corresponding to 90 °. Therefore, the possibility becomes low. However, when the width θ is greatly reduced from a width corresponding to 90 °, the magnitude of the magnetomotive force linked to the rotor windings 28n and 28s is greatly reduced. For this reason, such inconvenience can be prevented by setting the width θ to a width corresponding to about 90 °. For this reason, it is preferable that the width θ of each rotor winding 28n, 28s in the circumferential direction is substantially equal to a width corresponding to 90 ° in electrical angle.

  In the rotating electrical machine 10, the torque of the rotor 14 can also be controlled by controlling the current advance angle with respect to the rotor position, which is the phase of the alternating current that flows through the stator windings 20u, 20v, and 20w. Furthermore, the torque of the rotor 14 can also be controlled by controlling the amplitude of the alternating current flowing through the stator windings 20u, 20v, 20w. Further, since the torque of the rotor 14 changes even when the rotation speed of the rotor 14 is changed, the torque of the rotor 14 can be controlled by controlling the rotation speed of the rotor 14.

  In the above-described embodiment, each auxiliary salient pole 44 is formed in a substantially linear shape, but each auxiliary salient pole 44 may have a shape having one or a plurality of curved portions. For this reason, each auxiliary salient pole 44 can also have a shape protruding in a curved shape from the circumferential side surface of the main salient pole 26.

  In the configuration shown in FIGS. 3 and 4A described above, the two main salient poles 26 adjacent to each other in the circumferential direction of the rotor 14 are set as one set, and each set is wound around one main salient pole 26. One end of one induction winding 30 and one end of a second induction winding 34 wound around another main salient pole 26 are connected via a first diode 38 and a second diode 40 which are two rectifier elements. Explained when to do. However, in this embodiment, it can also be configured as shown in FIG. 4B. FIG. 4B is a diagram corresponding to FIG. 4A, showing another example in which the number of diodes connected to the rotor winding is reduced. In another example shown in FIG. 4B, in the present embodiment, a plurality of first induction windings 30 wound around the distal end side of every other main salient pole 26 (see FIG. 1) in the circumferential direction that becomes the north pole of the rotor. Are connected in series to form a first induction winding set 90, and a plurality of second induction windings 34 wound around the tip end of every other main salient pole 26 in the circumferential direction that becomes the S pole of the rotor. Are connected in series to form a second induction winding set 92. One end of the first induction winding set 90 and the second induction winding set 92 is connected at the connection point R via the first diode 38 and the second diode 40 whose forward directions are opposite to each other.

  Further, as shown in FIG. 4B, when the two main salient poles 26 (see FIG. 1) adjacent to the circumferential direction of the rotor are one set, the first common winding 32 in each set. The second common windings 36 are connected in series to form a common winding set 42, and all the common winding sets 42 related to all the main salient poles 26 are connected in series. Furthermore, among the plurality of common winding sets 42 connected in series, one end of the first common winding 32 of one common winding set 42 serving as one end is connected to the connection point R, and another common winding serving as the other end is connected. One end of the second common winding 36 of the wire set 42 is connected to the other end opposite to the connection point R of the first induction winding set 90 and the second induction winding set 92. In such a configuration, unlike the configurations shown in FIGS. 3 and 4A, the total number of diodes provided in the rotor can be reduced to two, that is, the first diode 38 and the second diode 40. Even in this case, auxiliary salient poles 44 (see FIG. 1) are formed on the side surfaces of the respective main salient poles 26, and the induction windings 30 and 34 are respectively provided in the radially outer and radially inner spaces partitioned by the auxiliary salient poles 44. And common windings 32 and 36 can be arranged.

  In the above embodiment, auxiliary salient poles having various shapes can be used. FIG. 10 is a view corresponding to FIG. 2, showing a first example of another example of the auxiliary salient pole 44. In the configuration shown in FIG. 10, each auxiliary salient pole 44 protrudes in the circumferential direction from both circumferential side surfaces of each main salient pole 26, and is connected by a connecting portion 80 between the auxiliary salient poles 44 adjacent in the circumferential direction. . The rotor 14 includes a radial salient pole 82 that protrudes radially outward from the coupling portion 80 and has magnetism.

  In the configuration shown in FIG. 10, unlike the configuration shown in FIGS. 1 to 5, the total cross-sectional area of the induction winding 30 (34) arranged on the radially outer side of the auxiliary salient pole 44 can be increased. For this reason, it becomes easy to arrange many rotor windings 28n (28s) outside the auxiliary salient poles 44 in the radial direction of the rotor 14. Other configurations and operations are the same as those of the embodiment shown in FIGS. 1 to 4A and 4B or the embodiment shown in FIG.

  Next, FIG. 11 is a view corresponding to the right side portion of FIG. 2, showing a second example of another example of the auxiliary salient pole 44 in the rotating electrical machine according to another embodiment of the present invention. In the configuration shown in FIG. 11, in the embodiment shown in FIGS. 1 to 4, the wide tip portion 62 whose width in the circumferential direction increases toward the tip at the tip of each auxiliary salient pole 44 is provided. . That is, each auxiliary salient pole 44 has a wide tip portion 62, and the width of the wide tip portion 62 in the circumferential direction increases toward the outer side in the radial direction of the rotor 14. Further, the auxiliary salient poles 44 adjacent in the circumferential direction are coupled at the distal end portion of the wide distal end portion 62. A front end surface H of the wide front end portion 62 facing the stator 12 is a curved surface along the circumferential direction of the annular gap space 64 between the stator 12 and the rotor 14 or a flat surface in contact with the curved surface. According to such a configuration, a magnetic flux component necessary for spatial harmonics from the stator 12, for example, a spatial secondary harmonic component, without increasing the width in the circumferential direction of each auxiliary salient pole 44 as a whole. Can be efficiently guided from the auxiliary salient pole 44 to the main salient pole 26. For this reason, the magnetic flux component necessary for the spatial harmonics from the stator 12 is passed through the auxiliary salient pole 44 or the main salient pole 26 without excessively reducing the arrangement space of the rotor windings 28n (28s). A large amount of magnetic flux can be efficiently linked to the rotor winding 28n (28s) by efficiently inducing the pole 44. As a result, the torque and efficiency of the rotating electrical machine 10 can be effectively improved. Other configurations and operations are the same as those of the embodiment shown in FIGS. 1 to 4A and 4B.

  FIG. 12 is a view corresponding to the right side portion of FIG. 2, showing a third example of another example of the auxiliary salient pole 44 in the rotating electrical machine according to another embodiment of the present invention. In the configuration shown in FIG. 12, not only the tip portion of the auxiliary salient pole 44 but also the intermediate portion has a larger width in the circumferential direction. That is, the width of the auxiliary salient pole in the circumferential direction is gradually increased from the root portion toward the tip. Further, a wide tip portion 66 is provided at the tip portion of the auxiliary salient pole 44 so that the width in the circumferential direction increases toward the radially outer side of the rotor 14. In the case of such a configuration, similarly to the configuration shown in FIG. 11 described above, a necessary magnetic flux component of spatial harmonics is generated from the stator 12 without excessively reducing the arrangement space of the rotor windings 28n (28s). The torque and efficiency of the rotating electrical machine 10 can be effectively improved by efficiently guiding the main salient pole 26 or the auxiliary salient pole 44 through the auxiliary salient pole 44 or the main salient pole 26. Other configurations and operations are the same as those of the embodiment shown in FIGS. 1 to 4A and 4B or the configuration shown in FIG.

  FIG. 13 is a view corresponding to the right side portion of FIG. 2, showing a fourth example of another example of the auxiliary salient pole 44 in the rotating electric machine according to another embodiment of the present invention. In the configuration shown in FIG. 13, the tip portions of the auxiliary salient poles 44 adjacent in the circumferential direction are coupled via a plate-like nonmagnetic coupling portion 84. The nonmagnetic coupling portion 84 is formed of a nonmagnetic material such as a titanium alloy or a substantially nonmagnetic material. The nonmagnetic coupling portion 84 is provided along the axial direction (front and back direction in FIG. 13) of the tip portion of the auxiliary salient pole 44. Therefore, the auxiliary salient poles 44 adjacent in the circumferential direction in the rotor slot 46 are coupled via the nonmagnetic coupling portion 84. According to such a configuration, it is possible to suppress the flow of the magnetic flux that does not contribute to the torque to each main salient pole 26 and to improve the torque more effectively. That is, in the embodiment shown in FIG. 1 to FIG. 4A and FIG. 4B, the auxiliary salient poles 44 having adjacent magnetism are directly and integrally connected to each other. From the rotor core 24 (see FIG. 1), a main salient pole 26 that is an N pole, an auxiliary salient pole 44 coupled to the main salient pole 26, another auxiliary salient pole 44 coupled to the auxiliary salient pole 44, There is a possibility that a magnetic circuit is formed in which the magnetic flux flows in order through the main salient pole 26, which is the S pole, to which another auxiliary salient pole 44 is coupled, and the rotor core 24. In this case, this looping magnetic circuit does not contribute to torque. Further, since the magnetic flux flows in the looped magnetic circuit, the magnetic flux saturation of the main salient pole 26 is likely to occur, and there is room for improvement in terms of effectively preventing the decrease of the magnetic flux contributing to the torque. According to the configuration of FIG. 13, such a point can be improved, and the torque can be improved more effectively. Other configurations and operations are the same as those of the embodiment shown in FIGS. 1 to 4A and 4B.

  FIG. 14 is a schematic cross-sectional view showing part of the rotor 14 and the stator 12 in the circumferential direction in a rotating electrical machine according to another embodiment of the present invention. In the present embodiment, in the embodiment shown in FIGS. 1 to 4A and 4B, the auxiliary salient poles 44 (see FIG. 1) projecting from both side surfaces are not provided on each main salient pole 26. The main salient poles 26 provided at a plurality of locations in the circumferential direction of the rotor 14 are provided with a small width portion 86 provided from the root portion to the middle portion in the length direction and a tip portion, and the cross-sectional width W1 in the circumferential direction is the small width portion 86. And a large portion 88 larger than the circumferential cross-sectional width W2. In addition, flanges 48 projecting in the circumferential direction are provided on both side surfaces in the circumferential direction of the tip of each main salient pole 26. For this reason, among the main salient poles 26, the circumferential cross-sectional width W1 on the distal end side of the main body portion that is a portion excluding the flange portion 48 is larger than the circumferential cross-sectional width W2 on the root side of each main salient pole 26. It is larger (W1> W2). Side surfaces in the circumferential direction of the narrow portion 86 and the large portion 88 are continuous with a tapered surface, a stepped portion, or a curved surface portion having an arcuate cross section. The induction windings 30 and 34 are wound around the large portion 88, and the common windings 32 and 36 are wound around the small width portion 86. In addition, the collar part 48 provided in the front-end | tip part of each main salient pole 26 can also be abbreviate | omitted like embodiment shown in FIGS. 1-4A and 4B.

  In the case of the configuration shown in FIG. 14 as well, as in each of the above embodiments, the circumferential cross-sectional width W1 on the distal end side of the main body portion of each main salient pole 26 is the root side of each main salient pole 26. Is larger than the cross-sectional width W2 in the circumferential direction (W1> W2). For this reason, in the gap portion G between the rotor 14 and the stator 12, the portion where the main salient poles 26 of the rotor 14 and the teeth 18 of the stator 12 face each other in the radial direction is substantial when the amount of magnetic flux passing therethrough is large. In particular, the opposing cross-sectional area of the portion that affects the magnetic resistance increases. For this reason, the magnetic resistance in the gap part G falls. As a result, the magnetic flux amount of the main magnetic flux acting on the rotor 14 from the rotor 14 or the stator 12 on the rotor 14 is increased, and the torque of the rotating electrical machine 10 can be improved. In addition, since the cross-sectional width W2 in the circumferential direction on the base side of each main salient pole 26 of the rotor 14 can be reduced, the cross-sectional area of the common windings 32 and 36 that are rotor windings wound around the base side is increased. Since the copper loss can be reduced, the torque of the rotating electrical machine 10 can be further improved. Further, since the distance La between the portion where the induction windings 30 and 34 of the main salient pole 26 are wound and the tip of the tooth 18 is shortened, the magnetic resistance is reduced and the stator 12 acts on the induction windings 30 and 34. The induction magnetic flux which is the magnetic flux interlinking with the induction windings 30 and 34 is increased, and the torque of the rotating electrical machine 10 can be further improved.

  On the other hand, FIG. 15 is a view corresponding to FIG. 14 and showing a second example of the rotating electrical machine of the comparative example. The comparative example shown in FIG. 14 has the same configuration as that of the embodiment shown in FIG. 14 described above, and the cross-sectional width in the circumferential direction of the main body portion excluding the collar portion 48 is the same over the entire length of each main salient pole 26. . For this reason, the cross-sectional width on the distal end side of the main body portion of each main salient pole 26 is the same as the cross-sectional width on the root side. In such a comparative example, in the gap portion between the rotor 14 and the stator 12, the amount of magnetic flux passing therethrough is large in the portion where the main salient pole 26 of the rotor 14 and the tooth 18 of the stator 12 face each other in the radial direction. In this case, the cross-sectional area of the portion where the main body portion of the main salient pole 26 and the tip of the tooth 18 are overlapped in the radial direction, which is the opposed cross-sectional area of the portion that substantially affects the magnetic resistance, decreases, and the magnetoresistance of the gap portion Rm increases. In addition, the distance between the portion of the main salient pole 26 where the induction windings 30 and 34 are wound and the tip of the tooth 18 increases, and the induction magnetic flux decreases. For this reason, in the rotary electric machine 10 of a comparative example, a torque may fall.

  On the other hand, in the comparative example of FIG. 15, it is possible to increase the overall width of the main salient pole 26 in the circumferential direction while keeping the cross-sectional width of the main body portion the same over the entire length, In this case, the arrangement space of the common windings 32 and 36 is reduced, and the cross-sectional area of the common windings 32 and 36 is reduced. For this reason, a copper loss increases and the torque of the rotary electric machine 10 may fall. According to the above embodiment, such inconvenience can be solved and the torque of the rotating electrical machine 10 can be improved. Other configurations and operations are the same as those of the embodiment shown in FIGS. 1 to 4A and 4B or the embodiment shown in FIG.

  FIG. 16 is a schematic cross-sectional view showing part of the rotor 14 and the stator 12 in the circumferential direction in a rotating electrical machine according to another embodiment of the present invention. FIG. 17 is an enlarged view of a portion B in FIG. In the configuration shown in FIGS. 16 and 17, in the configuration shown in FIGS. 1 to 4, a flange portion 48 is provided at the tip of each main salient pole 26 as in the configuration of FIG. 5. The flange 48 can be omitted. Further, two auxiliary salient poles 44 for each rotor slot 46 that are coupled to the circumferential side surfaces of the main salient poles 26 that are adjacent to each other in the circumferential direction and that face each other in the circumferential direction are located in the rotor slot 46. Not joined. The tip portions of the auxiliary salient poles 44 facing each other are separated from each other. According to this configuration, it is possible to effectively prevent the magnetic flux that does not contribute to the torque from flowing through the main salient pole 26. That is, it is possible to effectively suppress the formation of a looping magnetic circuit by a portion including the main salient poles 26 adjacent to each other in the circumferential direction, the rotor core 24 deviated from the main salient poles 26, and the auxiliary salient poles 44. The torque of the electric machine 10 can be effectively improved. Further, the common windings 32 and 36 can be easily arranged in a space inside the auxiliary salient pole 44 in the radial direction of the rotor 14. Other configurations and operations are the same as those of the embodiment shown in FIGS. 1 to 4A and 4B or the embodiment shown in FIG.

  In the configuration shown in FIGS. 16 and 17, each auxiliary salient pole 44 is formed in a shape that protrudes in the circumferential direction from the circumferential side surface of the main salient pole 26 and is bent radially outward at the intermediate portion. Alternatively, as shown in FIGS. 11 and 12, each auxiliary salient pole 44 can be formed in a shape having a distal end portion whose width in the circumferential direction increases toward the outer side in the radial direction.

  FIG. 18 is a schematic cross-sectional view showing part of the rotor 14 and the stator 12 in the circumferential direction in a rotating electrical machine according to another embodiment of the present invention. In the embodiment shown in FIGS. 1 to 4, the case where the induction windings 30 and 34 and the common windings 32 and 36 are wound around the main salient poles 26 has been described. However, as in the configuration shown in FIG. 18, the rotor windings 68 n and 68 s wound around the main salient poles 26 are transferred to the other rotor windings 68 s and 68 n wound around the adjacent main salient poles 26. Alternatively, it can be divided. That is, the rotor 14 has a plurality of first rotor windings 68n wound around each other main salient pole 26 in the circumferential direction by concentrated winding, and the main salient pole 26 wound with the first rotor winding 68n. A plurality of second rotor windings 68s are wound in concentrated winding on every other main salient pole 26 in the circumferential direction, which are adjacent main salient poles 26.

  A second rotor winding circuit in which one first diode 38 is connected to a first rotor winding circuit 70 in which a plurality of first rotor windings 68n are connected in series, and a plurality of second rotor windings 68s are connected in series. One second diode 40 is connected to 72. That is, a plurality of first rotor windings 68n arranged every other in the circumferential direction of the rotor 14 are electrically connected in series and connected endlessly, and a first diode is partly disposed therebetween. 38 is connected in series with each first rotor winding 68n to constitute a first rotor winding circuit 70. Each first rotor winding 68n is wound around a main salient pole 26 that functions as the same magnetic pole (N pole).

  The plurality of second rotor windings 68s are electrically connected in series and are connected in an endless manner, and a second diode 40 is connected in series with each of the second rotor windings 68s in part between them. Thus, a second rotor winding circuit 72 is configured. Each second rotor winding 68s is wound around the main salient pole 26 that functions as the same magnetic pole (S pole). Further, the rotor windings 68n and 68s wound around the main salient poles 26 adjacent to each other in the circumferential direction (where magnets having different magnetic poles are formed) are electrically separated from each other.

  Also, the current rectification directions of the rotor windings 68n and 68s by the diodes 38 and 40 are reversed so that the main salient poles 26 adjacent to each other in the circumferential direction of the rotor 14 have different magnetic poles. Yes. That is, the direction of current flowing in the first rotor winding 68n and the second rotor winding 68s arranged adjacent to each other in the circumferential direction (rectification direction by the diodes 38 and 40), that is, the forward direction is opposite to each other. The diodes 38 and 40 are connected to the rotor windings 68n and 68s. The diodes 38 and 40 are connected to the rotor windings 68n and 68s in opposite directions.

  Further, the winding central axis of each rotor winding 68n, 68s coincides with the radial direction. The diodes 38 and 40 rectify the current flowing through the corresponding rotor windings 68n and 68s by the generation of the induced electromotive force due to the rotating magnetic field including the spatial harmonics generated by the stator 12, so that the circumference of the rotor 14 is increased. The phases of the currents flowing through the rotor windings 68n and 68s adjacent in the direction are alternately changed between the A phase and the B phase. The diodes 38 and 40 independently rectify the current flowing through the corresponding rotor windings 68n and 68s by the generation of the induced electromotive force, and generate a plurality of circumferential directions generated by the current flowing through the rotor windings 68n and 68s. The magnetic characteristics of the main salient poles 26 are alternately changed in the circumferential direction. In this configuration, the number of diodes 38 and 40 can be reduced to two as a whole, and the winding structure of the rotor 14 can be simplified.

  Further, the auxiliary salient poles 44 are protruded from both sides in the circumferential direction of the main salient poles 26, and the rotor windings 68n and 68s wound around the main salient poles 26 are divided into the tip side and the root side by the auxiliary salient poles 44. However, the tip ends and the root sides of the rotor windings 68n and 68s are connected in series. In addition, among the rotor windings 68n and 68s divided by the auxiliary salient pole 44 into the tip side and the root side, the cross-sectional area at the root side can be made larger than the cross-sectional area at the tip side. In the example shown in the figure, the auxiliary salient poles 44 are formed so as to protrude from the circumferential side surface of the main salient pole 26 in a direction inclined with respect to the circumferential direction. It can also be formed to project and bend in the radial direction at the intermediate portion. Further, as in the configuration shown in FIGS. 11 and 12, the circumferential width of the tip of the auxiliary salient pole 44 can be increased. In the case of the configuration shown in FIG. 18 as well, it is possible to improve the torque and efficiency of the rotating electrical machine 10 by interlinking a large amount of spatial harmonics included in the rotating magnetic field generated by the stator 12 with the rotor windings 68n and 68s. it can. Other configurations and operations are the same as those shown in FIGS. 1 to 4A. In the configuration shown in FIG. 18, the auxiliary salient poles 44 that are adjacent in the circumferential direction in the rotor slot 46 can be connected to each other as in the configurations of FIGS. 1 to 4A.

  Further, as shown in FIG. 19, the first diode 38 or the second diode 40 can be short-circuited for each of the rotor windings 68 n and 68 s wound around the main salient poles 26. . Other configurations and operations are the same as those shown in FIGS. 1 to 4A or the configuration shown in FIG.

  Although illustration is omitted, in the rotating electrical machine drive system 50 shown in FIG. 6 described above, the pulse current is periodically superimposed on the q-axis current or the d-axis current of the rotating electrical machine 10 to further increase the speed of the rotating electrical machine 10. Torque can also be increased. When superimposing the pulse current on the q-axis current, it is preferable to superimpose a decreasing pulse current that increases after decreasing in a pulse shape from the viewpoint of miniaturization of the inverter 52 and the like. When superimposing a pulse current on a d-axis current, it is preferable from the aspect of torque increase to superimpose an increasing pulse current that increases after increasing in a pulse shape. The increasing pulse current can be superimposed on the d-axis current, and at the same time the decreasing pulse current can be superimposed on the q-axis current. The d-axis refers to the magnetic pole direction that is the winding central axis direction of the rotor windings 28n, 28s (or 68n, 68s) with respect to the circumferential direction of the rotating electrical machine 10, and the q-axis is an electrical angle with respect to the d-axis. The direction advanced 90 degrees. For example, when the rotation direction of the rotor 14 is defined as shown in FIGS. 1, 14, 16, and 18, the d-axis direction and the q-axis direction are as shown in FIGS. Are defined by the relationship indicated by the arrows.

  As mentioned above, although the form for implementing this invention was demonstrated, this invention is not limited to such embodiment at all, and it can implement with a various form in the range which does not deviate from the summary of this invention. Of course. For example, in the above description, the case where the rotor is disposed opposite to the inner side in the radial direction of the stator has been described. However, the present invention can be implemented even in a configuration in which the rotor is disposed opposite to the outer side in the radial direction of the stator. In addition, the case where the stator winding is wound on the stator by concentrated winding has been described, but for example, if the stator can generate a rotating magnetic field including spatial harmonics, the stator winding may be wound on the stator by distributed winding. The present invention can be implemented. In each of the above embodiments, the case where the magnetic characteristic adjusting unit is a diode has been described. However, the function of varying the magnetic characteristics generated in the plurality of main salient poles in the circumferential direction by the induced electromotive force generated in the rotor windings. Any other configuration can be adopted as long as it has the following. In the present invention, for example, a configuration such as an axial gap type rotating electrical machine can be employed.

  DESCRIPTION OF SYMBOLS 10 Electromagnet-type rotary electric machine, 12 Stator, 14 Rotor, 16 Stator core, 18 Teeth, 20u, 20v, 20w Stator winding, 22 Status lot, 24 Rotor core, 26 Main salient pole, 28n 1st rotor winding, 28s 2nd rotor Winding, 30 First induction winding, 32 First common winding, 34 Second induction winding, 36 Second common winding, 38 First diode, 40 Second diode, 42 Common winding set, 44 Auxiliary bump Pole, 46 rotor slot, 48 collar, 50 rotary electric machine drive system, 52 inverter, 54 control device, 56 power storage device, 58 capacitor, 60 current sensor, 62 wide tip, 64 gap space, 66 wide tip, 68n 1 rotor winding, 68s 2nd rotor winding, 70 1st rotor winding circuit, 72 2nd rotor winding Circuit, 78 coupling portion, 80 coupling portion, 82 radial salient pole, 84 nonmagnetic coupling portion, 86 narrow portion, 88 large portion, 90 first induction winding set, 92 second induction winding set.

Claims (8)

An electromagnet type rotating electrical machine in which a stator and a rotor are arranged to face each other,
The stator includes a stator core, teeth disposed at a plurality of positions in the circumferential direction of the stator core, and at least a plurality of stator windings wound around the stator core or the teeth to generate a rotating magnetic field,
The rotor includes a rotor core, main salient poles arranged at a plurality of locations in the circumferential direction of the rotor core, a plurality of rotor windings wound around the main salient poles, and an induced electromotive force generated in each rotor winding. A magnetic characteristic adjusting unit that alternately changes the magnetic characteristics generated in the plurality of main salient poles in the circumferential direction,
Further, the electromagnetic rotary electric machine is characterized in that the circumferential cross-sectional width of the main body portion of each main salient pole is larger than the circumferential cross-sectional width of each main salient pole on the root side. In the electromagnet-type rotating electrical machine according to claim 1,
The plurality of rotor windings are wound around the front end side of the main salient pole main body portion to generate an induction current, and are wound closer to the root side than the induction winding of each main salient pole. And a common winding connected to the induction winding and functioning as an electromagnet. The electromagnet-type rotating electrical machine according to claim 2,
Of the main salient poles, the circumferential cross-sectional width of the portion around which the induction winding is wound is larger than the circumferential cross-sectional width on the base side of each main salient pole. Electric. The electromagnet-type rotating electrical machine according to claim 3,
Of each of the main salient poles, the circumferential width of the portion around which the induction winding is wound is larger than the circumferential width of the portion of each of the main salient poles around which the common winding is wound. An electromagnet type rotating electrical machine characterized by being large. The electromagnet-type rotating electrical machine according to any one of claims 1 to 4,
The rotor protrudes from the circumferential side surface of each main salient pole, and includes an auxiliary salient pole having magnetism,
Of each of the main salient poles, the circumferential cross-sectional width on the tip side of the portion to which the auxiliary salient pole is connected is larger than the circumferential cross-sectional width on the root side of the portion to which the auxiliary salient pole is connected. An electromagnet type rotating electrical machine characterized by being large. In the electromagnet-type rotating electrical machine according to any one of claims 1 to 5,
Each induction winding is connected to a rectifying element that is the magnetic characteristic adjusting unit, and the rectifying element rectifies a current flowing through each induction winding by generating an induced electromotive force, thereby adjacent to the circumferential direction. An electromagnet-type rotating electrical machine characterized in that the phases of currents flowing through the matching induction windings are alternately changed between an A phase and a B phase. The electromagnet-type rotating electrical machine according to any one of claims 1 to 6,
The rotor winding is
Among the plurality of main salient poles, a first induction winding which is the induction winding wound around the tip side of every other main salient pole in the circumferential direction, and the first induction winding is wound. A second induction winding that is the induction winding wound on the tip side of another main salient pole adjacent to the main salient pole, and a base side of the main salient pole on which the first induction winding is wound A first common winding that is the wound common winding, and a second common winding that is the common winding wound around the base salient pole on which the second induction winding is wound. Including
The first induction winding and the second induction winding are connected at a connection point via a rectifying element that is the magnetic characteristic adjusting unit opposite to each other, and the connection point, the first induction winding, and the first induction winding An electromagnetic rotation characterized in that a common winding set formed by connecting the first common winding and the second common winding in series is connected between two induction windings Electric. The electromagnet-type rotating electrical machine according to any one of claims 1 to 7,
The width of each rotor winding in the circumferential direction of the rotor is shorter than a width corresponding to 180 ° in electrical angle.

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