JP2010279127A - Magnetic inductor type rotating machine and turbocharger using the same - Google Patents

Abstract

An object of the present invention is to effectively cool a field coil, suppress an excessive temperature rise of the field coil, improve durability, and lead-out structure of the lead wire of the field coil To obtain a magnetic inductor type rotating machine that can easily draw out the lead wire of the field coil and a turbocharger using the same.
A refrigerant flow passage is formed in a frame, and a lead-out line drawing groove is recessed in an inner peripheral surface of the frame. The lead wire 18 of the field coil 12 passes through the lead wire drawing groove 17 and is drawn out from the frame 13 in the axial direction.
[Selection] Figure 1

Description

  The present invention relates to a magnetic inductor type rotating machine suitable for being driven in a high-speed rotation range and a turbocharger using the same, and more particularly to a cooling structure for the field means.

  A conventional magnetic inductor type rotating machine surrounds a first rotor and a rotor composed of a first rotor and a second rotor mounted on a rotary shaft such that the magnetic pole pitches differ from each other by a half pitch. A first stator core, a second stator core surrounding the second rotor, a field coil interposed between the first stator core and the second stator core, and generating a field magnetomotive force, A cover surrounding the first stator core and the second stator core, forming a magnetic path through which magnetic flux generated by the field coil flows, and the first stator core and the second stator core are wound and rotated. And a stator including a torque generating winding for generating torque in the child (see, for example, Patent Document 1).

  In the conventional magnetic inductor type rotating machine configured as described above, since the rotor is composed only of a solid iron core, it is excellent in strength and suitable for an application driven at high speed.

JP 09-247910 A

In the conventional magnetic inductor type rotating machine, the output can be increased by increasing the field magnetomotive force.
However, if the energization current to the field coil is increased to increase the field magnetomotive force, the copper loss of the field coil increases in proportion to the square of the energization current, and the heat generation amount of the field coil increases. . Since the field coil is interposed between the first and second stator cores, it is difficult to cool the field coil, and the heat generated in the field coil is not effectively cooled. There was a problem that the temperature of the field coil excessively increased.

In addition, if the rotating machine is used for in-vehicle use, the rotating machine is placed in a high-temperature atmosphere, so that a large thermal stress is generated due to the difference in thermal expansion between the field coil and the stator core. There was a problem that decreased. In particular, when the rotating machine is used as a compressor driving motor for a turbocharger, the rotating machine is placed in a high temperature atmosphere of 200 ° C. to 300 ° C. due to the heat from the exhaust side turbine, so the durability is greatly reduced. Will do.
Furthermore, since the field coil is interposed between the first and second stator cores, it is difficult to draw out the lead wire for supplying power to the field coil.

  The present invention has been made in order to solve such a problem, and can effectively cool the field coil, can suppress an excessive temperature rise of the field coil, and has durability. The present invention aims to obtain a magnetic inductor type rotating machine and a turbocharger using the same, in which the lead-out structure of the lead wire of the field coil can be improved and the lead-out wire of the field coil can be easily drawn.

  In the magnetic inductor type rotating machine according to the present invention, each of the teeth defining a slot opening on the inner peripheral side protrudes radially inward from the inner peripheral surface of the cylindrical core back and is predetermined in the circumferential direction. A first stator core and a second stator which are manufactured in the same shape and are arranged with a plurality of pitches, are spaced apart by a predetermined distance in the axial direction, and are coaxially arranged with the circumferential positions of the teeth aligned. A stator core having a pair with an iron core, a stator having a multiphase coil wound around the stator core, and an externally fitted state between the first stator core and the second stator core forming a pair And a frame that forms a magnetic path by connecting the core backs of the first stator core and the second stator core in the axial direction, and salient poles are arranged at equiangular pitches in the circumferential direction. The pair of the first rotor core and the second rotor core manufactured in the same shape is Positioned on the inner peripheral side of the first stator core and the second stator core that form a pair, and are offset from each other by a half salient pole pitch in the circumferential direction and fixed coaxially to the rotating shaft, and rotate in the frame. A salient pole of the first rotor core and the second rotor are disposed between the core back of the rotor housed freely and the pair of the first stator core and the second stator core. And a field coil for generating a field magnetic flux so that the salient poles of the iron core have different polarities. The refrigerant flow passage is formed in the frame, the lead wire lead groove is recessed in the inner peripheral surface of the frame, and the lead wire of the field coil passes through the lead wire lead groove and is pivoted from the frame. Has been pulled out of the direction.

According to this invention, since the refrigerant flow passage is formed in the frame, the heat generated in the field coil interposed between the core backs of the first stator core and the second stator core is generated by the refrigerant flow passage. Heat is absorbed by the refrigerant circulating in the interior. Therefore, an excessive temperature rise of the field coil is suppressed, and generation of thermal stress due to a difference in thermal expansion between the field coil and the stator core is suppressed, and durability is improved.
Also, the lead wire lead groove is recessed in the inner peripheral surface of the frame, and the lead wire of the field coil passes through the lead wire lead groove and is drawn axially outward from the frame. In addition to being able to be drawn out, the lead-out line drawing structure does not affect the layout of the refrigerant flow passage formed in the frame.

It is a partially broken perspective view which shows the main structures of the homopolar type | mold rotary machine which concerns on Embodiment 1 of this invention. It is the principal part end elevation which looked at the homopolar type | mold rotary machine which concerns on Embodiment 1 of this invention from the axial direction one side. It is the principal part end elevation which looked at the homopolar type | mold rotary machine which concerns on Embodiment 2 of this invention from the axial direction one side. It is the principal part end elevation which looked at the homopolar type | mold rotary machine which concerns on Embodiment 3 of this invention from the axial direction one side. It is the principal part end elevation which looked at the homopolar type | mold rotary machine which concerns on Embodiment 4 of this invention from the axial direction one side. It is the principal part end elevation which looked at the homopolar type | mold rotary machine which concerns on Embodiment 5 of this invention from the axial direction one side. It is the principal part end elevation which looked at the homopolar type | mold rotary machine which concerns on Embodiment 6 of this invention from the axial direction one side. It is the schematic which shows the structure of the hybrid engine assist system for vehicles carrying the turbocharger using the homopolar type | mold rotary machine which concerns on Embodiment 7 of this invention.

  Hereinafter, preferred embodiments of a magnetic inductor type rotating machine according to the present invention will be described with reference to the drawings.

Embodiment 1 FIG.
1 is a partially broken perspective view showing a main configuration of a homopolar rotating machine according to Embodiment 1 of the present invention, and FIG. 2 is a view of the homopolar rotating machine according to Embodiment 1 of the present invention as viewed from one axial direction. FIG. In FIG. 1, arrows indicate the flow of magnetic flux. Further, in FIG. 2, a multiphase coil is omitted.

  1 and 2, a homopolar rotating machine 1 is a magnetic inductor type synchronous rotating machine, and includes a rotor 3 coaxially fixed to a rotating shaft 2 made of a massive magnetic material such as iron, and a rotor. A stator core 8 disposed so as to surround 3 and a stator 7 formed by winding a multiphase coil 11 as a drive coil for generating torque, and a field coil 12 for generating a field magnetomotive force. And a cylindrical frame 13 that houses the rotor 3, the stator 7, and the field coil 12.

  For example, the rotor 3 is formed by laminating and integrating a predetermined number of magnetic steel plates and first and second rotor cores 4 and 5 that are manufactured by laminating and integrating a plurality of magnetic steel plates that are formed into a predetermined shape as magnetic thin plates. And a disk-shaped partition wall 6 having a rotation shaft insertion hole (not shown) drilled at the axial center position. The first and second rotor cores 4 and 5 are formed in the same shape, and cylindrical base portions 4b and 5b each having a rotation shaft insertion hole (not shown) drilled at the axial center position, and the base portions 4b and 5b. The projecting poles 4a and 5a are provided so as to project outward in the radial direction from the outer circumferential surface and extend in the axial direction and are provided at two equiangular pitches in the circumferential direction. Further, the outer diameter of the partition wall 6 coincides with the outer diameter of the first and second rotor cores 4 and 5.

  The first and second rotor cores 4 and 5 are arranged in close contact with each other via the partition wall 6 with a half salient pole pitch shifted in the circumferential direction, and the rotary shaft 2 inserted through the rotary shaft insertion holes. It is fixed and configured. The thus configured rotor 3 is rotatably disposed in the frame 13 with both ends of the rotating shaft 2 being supported by bearings (not shown).

  The stator core 8 includes first and second stator cores 9 and 10 that are manufactured by laminating and integrating a large number of magnetic steel plates formed in a predetermined shape. The first and second stator cores 9 and 10 are made in the same shape, and are projected inward in the radial direction from the inner peripheral surfaces of the cylindrical core backs 9a and 10a and the core backs 9a and 10a. And 6 teeth 9b, 10b provided at an equiangular pitch. And the slots 9c and 10c opened to the inner peripheral side are defined by the core backs 9a and 10a and the adjacent teeth 9b and 10b.

  The first and second stator cores 9 and 10 are arranged so that the circumferential positions of the teeth 9b and 10b coincide with each other, and the first and second rotor cores 4 are separated between the axial thickness separation of the partition walls 6 respectively. , 5 are arranged in the frame 13 so as to surround them.

The multi-phase coil 11 is a three-phase coil wound in a so-called concentrated winding method in which conductor wires are wound around teeth 9b and 10b that are paired in the axial direction without straddling the slots 9c and 10c. Have In FIG. 1, only one phase coil is shown, but in actuality, the multiphase coil 11 has three U, V, and W in order with respect to six pairs of teeth 9b and 10b facing in the axial direction. The phase is repeated twice and wound into a concentrated winding.
The field coil 12 is a cylindrical coil in which one conductor wire is wound in a cylindrical shape, and is interposed between the core backs 9 a and 10 a of the first and second stator cores 9 and 10.

  The frame 13 is formed in a cylindrical shape using a massive magnetic material such as iron. Then, the frame 13 is fitted into the first stator core 9 and the second stator core 10 in an externally fitted state and fixed by shrink fitting, and the first stator core 9 and the second stator core 10 are magnetically coupled. It is linked to.

  A refrigerant flow passage 14 is formed in the frame 13, and a refrigerant injection port 15 and a refrigerant discharge port 16 are disposed on the outer peripheral surface of the frame 13. As a result, a coolant such as water or oil is supplied from the coolant injection port 15 and flows through the coolant flow passage 14 and then discharged from the coolant discharge port 16.

  Further, the lead wire drawing groove 17 is recessed on the inner peripheral surface of the frame 13 so as to reach the region surrounding the field coil 12 from one axial end surface of the frame 13 with the groove direction as the axial direction. Then, a lead wire 18 on the positive electrode side constituted by the winding start end portion of the conductor wire constituting the field coil 12 is drawn out to one end side in the axial direction of the frame 13 through the lead wire drawing groove 17. Here, since in-vehicle equipment has a body ground, an electrical circuit can be formed by connecting the negative electrode side to a conductive metal part such as the frame 13. Since DC power is supplied to the field coil 12, a lead wire (not shown) on the negative electrode side composed of the end of winding of the conductor wire is connected to the frame 13, and a lead wire 18 on the positive electrode side is connected. Only the lead wire lead-out groove 17 is used to pull out the wire.

  Next, the operation of the homopolar rotating machine 1 configured as described above will be described.

  The magnetic flux generated by energizing the field coil 12, as shown by the arrow in FIG. 1, from the salient poles 4 a of the first rotor core 4 through the gaps, the teeth 9 b of the first stator core 9. , Flows radially outward in the first stator core 9 and enters the frame 13. The magnetic flux that has entered the frame 13 flows in the axial direction to the other side in the frame 13, enters the core back 10 a of the second stator core 10, and flows inward in the second stator core 10 in the radial direction. Then, the magnetic flux enters the salient pole 5a of the second rotor core 5 from the tooth 10b through the gap. The magnetic flux that has entered the second rotor core 5 flows radially inward through the second rotor core 5 and enters the rotary shaft 2. The magnetic flux that has entered the rotating shaft 2 flows in the rotating shaft 2 to one side in the axial direction and enters the first rotor core 4. The magnetic flux that has entered the first rotor core 4 flows radially outward in the first rotor core 4 and enters the teeth 9b of the first stator core 9 from the salient poles 4a through the gaps.

  At this time, since the salient poles 4a and 5a of the first and second rotor cores 4 and 5 are shifted by a half salient pole pitch in the circumferential direction, when viewed from the axial direction, the magnetic flux is generated between the N pole and the S pole. It acts as if it were arranged alternately in the direction. A torque is generated by passing an alternating current through the multiphase coil 11 in accordance with the position of the rotor 3. Accordingly, the homopolar rotating machine 1 is a non-commutator motor, and magnetically operates in the same manner as a 4-pole 6-slot concentrated winding type permanent magnet rotating machine.

  In addition, since the magnetic flux is generated by the field coil 12, the back electromotive force can be removed by stopping the energization to the field coil 12. This homopolar rotating machine 1 is also a rotating machine capable of field control.

Here, a refrigerant such as oil or water is supplied from the refrigerant injection port 15 to the refrigerant flow passage 14, flows through the refrigerant flow passage 14, and then discharged from the refrigerant discharge port 16. Therefore, the heat generated in the field coil 12 is transmitted to the frame 13 via the core backs 9a and 10a of the first and second stator cores 9 and 10 adjacent in the axial direction, or adjacent radially outward. Directly transmitted to the frame 13 and absorbed by the refrigerant flowing through the refrigerant flow passage 14.
Further, the heat generated in the multiphase coil 11 is transmitted to the frame 13 via the teeth 9b and 10b and the core backs 9a and 10a of the first and second stator cores 9 and 10, and circulates in the refrigerant flow passage 14. Heat is absorbed by the refrigerant.

  As described above, according to the first embodiment, the refrigerant flows through the refrigerant flow passage 14 formed in the frame 13 so that the heat generated in the field coil 12 can be effectively dissipated. Even if the energization current to the field coil 12 is increased to increase the field magnetomotive force, the temperature of the field coil 12 does not rise excessively. Therefore, in order to increase the field magnetomotive force, it is not necessary to increase the winding space of the field coil 12 and increase the number of turns of the field coil 12. That is, the increase in the physique of the homopolar rotating machine 1 resulting from expanding the winding space of the field coil 12 radially outward, or the resonance frequency resulting from expanding the winding space in the axial direction. A decrease, that is, a decrease in the critical rotational speed is avoided in advance.

Therefore, according to the first embodiment, the torque output can be increased without increasing the size of the homopolar rotating machine 1 and without reducing the dangerous rotational speed.
Further, even when the homopolar rotating machine 1 is applied to a vehicle, the upper layer of the temperature of the homopolar rotating machine 1 can be suppressed, so that the first and second stator iron cores 9 and 10 and the frame 13 and other iron-based parts can Generation of thermal stress due to the difference in thermal expansion coefficient with the magnetic coil 12 is suppressed, and durability can be enhanced.

  Further, since the lead wire drawing groove 17 is recessed in the inner peripheral surface of the frame 13 so as to reach from the one end in the axial direction to the radially outward position of the field coil 12, the lead wire drawing groove 17 is formed. This does not affect the layout of the refrigerant flow passage 14, the refrigerant injection port 15, and the refrigerant discharge port 16. Therefore, it becomes easy to manufacture the frame 13 including the refrigerant flow passage 14, the refrigerant injection port 15, the refrigerant discharge port 16, and the lead wire drawing groove 17, and the cost can be reduced.

  In the first embodiment, the lead wire drawing groove is recessed in the inner peripheral surface of the frame from one end in the axial direction to the radially outward position of the field coil. The line drawing groove may be recessed in the inner peripheral surface of the frame so as to extend from one end to the other end in the axial direction.

Embodiment 2. FIG.
FIG. 3 is an end view of a main part of a homopolar rotating machine according to Embodiment 2 of the present invention as viewed from one axial direction.

In FIG. 3, the lead-out lead-out groove 17 is recessed in the radially outer position of the teeth 9 b on the outer peripheral surface of the core back 9 a of the first stator core 9 so as to extend from one end to the other end in the axial direction. Yes. The lead wire 18 on the positive electrode side of the field coil 12 passes through the lead wire drawing groove 17 and is drawn to one end side in the axial direction of the first stator core 9.
Other configurations are the same as those in the first embodiment.

  In this homopolar rotating machine 1A, since the frame 13 and the stator core 8 are shrink-fitted and fixed, the frame 13 is required to have roundness and coaxiality of the inner diameter. However, if additional work is performed on the inner peripheral surface of the frame 13, it is difficult to ensure roundness and the like, and it is difficult to manage fitting such as shrinkage allowance.

According to the second embodiment, since the lead wire lead-out groove 17 is recessed in the outer peripheral surface of the core back 9a of the first stator core 9, no additional work is performed on the inner peripheral surface of the frame 13, The fitting management such as shrink fitting is easy to manage, and the bonding strength between the frame 13 and the stator core 8 can be increased.
In addition, since it is not necessary to provide the lead wire drawing groove 17 in the inner peripheral surface of the frame 13, the manufacturing cost of the frame 13 can be reduced.

  In addition, a lead-out lead groove 17 is formed in the first stator core 9. Therefore, the concave portion constituting the lead wire drawing groove 17 is formed simultaneously with the press forming of the magnetic steel sheet, and by laminating those magnetic steel plates, the lead wire drawing groove 17 having the concave portion connected in the axial direction is formed. The 1st stator core 9 which has can be produced. In this way, no additional process for forming the lead wire lead-out groove 17 is required, and the first stator core 9 having the lead wire lead-out groove 17 can be manufactured at low cost.

Embodiment 3 FIG.
FIG. 4 is an end view of a main part of a homopolar rotating machine according to Embodiment 3 of the present invention as viewed from one axial direction.

In FIG. 4, the field coil 12 is produced by winding one conductor wire in a cylindrical shape. A positive lead wire 18 constituted by a winding start end portion of a conductor wire constituting the field coil 12 and a negative lead wire 119 constituted by a winding end end portion are constituted by a first stator core. The first stator core 9 is drawn out to one end side in the axial direction through the same lead wire lead-out groove 17 formed on the outer peripheral surface of the core back 9a.
Other configurations are the same as those in the second embodiment.

  In this homopolar rotating machine 1B, since the field coil 12 is disposed close to the multiphase coil 11, noise such as switching timing of the multiphase coil 11 is caused in the current waveform of the field coil 12. included. In the third embodiment, the lead wires 18 and 19 corresponding to the winding start end portion and the winding end end portion of the field coil 12 are drawn out through the same lead wire drawing groove 17. The currents flowing through 18 and 19 are reversed, and the noise included in the current waveform of the field coil 12 is cancelled.

  Here, in a cylindrical coil produced by winding a single conductor wire into a cylindrical shape, for example, the winding start end is drawn out to the inner peripheral side of the cylindrical coil, and the winding end end is the cylindrical coil. It is pulled out to the outer peripheral side. In this case, after the lead wire constituted by the winding start end portion is drawn outward in the radial direction, the first stator core 9 passes through the lead wire drawing groove 17 together with the lead wire constituted by the winding end end portion. It will be pulled out to one end side in the axial direction. Therefore, it is preferable to use an α-winding coil in which the winding start end and the winding end end are both positioned on the outer peripheral side.

  In the third embodiment, the lead wire lead-out groove is formed on the outer peripheral surface of the core back of the first stator core. However, the lead wire lead-out groove is formed in the core back of the first stator core. You may form in a surrounding surface, ie, the bottom face of a slot. In this case, the noise of the multiphase coil 11 is likely to be applied to the current waveform flowing through the lead wire passing through the lead wire lead-out groove. However, by passing the lead wire on the positive electrode side and the negative electrode side through the lead wire lead-out groove together, the noise Can be canceled effectively.

Embodiment 4 FIG.
FIG. 5 is an end view of a main part of a homopolar rotating machine according to Embodiment 4 of the present invention as viewed from one side in the axial direction.

In FIG. 5, the lead-out lead-out groove 17 is recessed in the radially outer position of the slot 9 c on the outer peripheral surface of the core back 9 a of the first stator core 9 so as to extend from one end to the other end in the axial direction. Yes.
Other configurations are the same as those in the third embodiment.

  In this homopolar rotating machine 1C, the magnetic flux that has entered the teeth 9b of the first stator core 9 from the salient poles 4a of the first rotor 4 flows radially outward in the teeth 9b, and then in the core back 9a. It flows radially outward and enters the frame 13. At this time, if the lead wire lead-out groove 17 is formed at a radially outward position of the tooth 9b on the outer peripheral surface of the core back 9a, the lead wire lead-out groove 17 enters the core back 9a from the tooth 9b, and the core back 9a. Will cross the magnetic path to the frame 13 by flowing outward in the radial direction. Therefore, the magnetic flux that has reached the lead wire lead-out groove 17 bypasses the lead wire lead-out groove 17 and flows to the frame 13, reducing the effective magnetic flux and causing a decrease in output.

  According to the fourth embodiment, the lead wire drawing groove 17 is formed at a radially outward position of the slot 9c on the outer peripheral surface of the core back 9a, so that the magnetic flux is indicated by an arrow in FIG. The tooth 9b enters the core back 9a, flows through the core back 9a radially outward, and enters the frame 13. That is, the magnetic flux does not flow around the lead wire drawing groove 17, and the reduction of the effective magnetic flux is suppressed and the output reduction is suppressed.

Embodiment 5 FIG.
6 is an end view of a main part of a homopolar rotating machine according to a fifth embodiment of the present invention as viewed from one axial direction.

In FIG. 6, the lead-out lead-out grooves 17 a and 17 b extend from the one end in the axial direction to the other end in the radial direction of the two slots 9 c on the outer peripheral surface of the core back 9 a of the first stator core 9. Is recessed. The field coil is made of a cylindrical coil obtained by winding two conductor wires into a cylindrical shape, and is a lead wire composed of a winding start end and a winding end end of one conductor wire. 20a and 20b are led out from the lead wire lead-out groove 17a to one end side in the axial direction of the first stator iron core 9, and lead wires 21a, which are composed of a winding start end portion and a winding end end portion of another conductor wire, 21b is led out from the lead wire lead-out groove 17b to one end side in the axial direction of the first stator core 9. Furthermore, the lead wires 20a and 21a are connected by an external circuit (not shown), the lead wires 20b and 21b are connected by an external circuit, and the two conductor wires are connected in parallel.
Other configurations are the same as those in the fourth embodiment.

In this homopolar rotating machine 1D, the field coil is configured by a cylindrical coil in which two conductor wires are wound in a cylindrical shape, and is configured by connecting coils made of two conductor wires in parallel. ing. Therefore, an equivalent output can be obtained by halving the cross-sectional area of each conductor wire while maintaining the number of turns of the field coil with respect to the field coil manufactured with one conductor wire.
Therefore, according to the fifth embodiment, the lead wires 20a, 20b, 21a, and 21b can be thinned while maintaining the output, and the groove cross-sectional areas of the lead wire drawing grooves 17a and 17b can be reduced. The mechanical strength of the stator core 9 can be increased.

Embodiment 6 FIG.
FIG. 7 is an end view of a homopolar rotating machine according to Embodiment 6 of the present invention, viewed from one axial direction.

  In FIG. 7, the lead-out lead-out grooves 17a to 17f extend from the one end in the axial direction to the other end at the radially outer positions of the six slots 9c on the outer peripheral surface of the core back 9a of the first stator core 9. Is recessed. The field coil is made of a cylindrical coil in which six conductor wires are wound in a cylindrical shape, and lead wires 22a to 22d composed of winding start ends and winding end ends of the respective conductor wires. 27a, 22b to 27b are drawn out to the one end side in the axial direction of the first stator core 9 from each of the lead wire drawing grooves 17a to 17f. Furthermore, the lead wires 22a to 27a are connected by an external circuit (not shown), the lead wires 22b to 27b are connected by an external circuit, and the six conductor wires are connected in parallel.

A positioning groove 28 as an engaging recess is provided in a radially outward position of the two teeth 9b on the outer peripheral surface of the core back 9a of the first stator core 9 so as to extend from one end in the axial direction to the other end. ing. Similarly, although not shown in the drawing, a positioning groove as an engaging recess is provided from one end in the axial direction to the radially outward position of the two teeth 10b on the outer peripheral surface of the core back 10a of the second stator core 10. It is recessed so as to reach the end. Further, a positioning protrusion 29 as an engaging protrusion protrudes from the inner peripheral surface of the frame 13 so as to be fitted with the positioning groove 28 and extends from one end surface in the axial direction of the frame 13 to the other end surface. Has been. Then, the positioning protrusions 29 are fitted into the positioning grooves 28, respectively, and the frame 13 is positioned and fitted into the first and second stator cores 9 and 10 in an externally fitted state.
Other configurations are the same as those in the fifth embodiment.

In this homopolar rotating machine 1E, the field coil is configured by a cylindrical coil in which six conductor wires are wound in a cylindrical shape, and is configured by connecting coils made of six conductor wires in parallel. ing. Therefore, with respect to a field coil produced with one conductor wire, an equivalent output can be obtained by reducing the cross-sectional area of each conductor wire to 1/6 while maintaining the number of turns of the field coil. .
Therefore, according to the sixth embodiment, the lead wires 22a to 27a and 22b to 27b can be further thinned while maintaining the output, and the groove cross-sectional areas of the lead wire drawing grooves 17a to 17f can be further reduced. The mechanical strength of the first stator core 9 can be further increased.

Further, positioning protrusions 29 protruding from the inner peripheral surface of the frame 13 are fitted into positioning grooves 28 recessed in the outer peripheral surfaces of the first and second stator cores 9 and 10. Therefore, the movement of the frame 13 in the circumferential direction with respect to the first and second stator cores 9 and 10 is prevented, and the frame 13 does not need to be shrink-fitted and fixed to the first and second stator cores 9 and 10. Further, the first and second stator cores 9 and 10 can be easily positioned with respect to the frame 13.
Therefore, the process of fitting the frame 13 to the first and second stator cores 9 and 10 is simplified, and the homopolar rotating machine 1E can be assembled at low cost. Further, even if the homopolar rotating machine 1E is applied to a vehicle, even if a gap is formed between the frame 13 and the stator core 8 due to the difference in thermal expansion coefficient between the frame 13 and the stator core 8, it is fixed. The frame 13 is prevented from rotating relative to the core 8.

Further, if the circumferential positional relationship between the teeth 9b of the first stator core 9 and the positioning grooves 28 and the circumferential positional relationship between the teeth 10b of the second stator core 10 and the positioning grooves are equalized, the positioning is performed. By simply fitting the protrusions 29 into the positioning grooves 28, the teeth 9b of the first stator core 9 and the teeth 10b of the second stator core 10 are arranged in a line in the axial direction. That is, when the frame 13 is fitted to the first and second stator cores 9 and 10, it is necessary to prepare a new member for positioning the first stator core 9 and the second stator core 10. Absent.
Therefore, the process of fitting the frame 13 to the first and second stator cores 9 and 10 is simplified, and the process of winding the multiphase coil 11 is simplified, and the homopolar rotating machine 1E can be assembled at low cost. it can.

  Furthermore, since it is not necessary to install the members for positioning both the first stator core 9 and the second stator core 10 in the slots 9c and 10c, a refrigerant flow path is secured in the slots 9c and 10c. It becomes easy. Therefore, when it is desired to improve the cooling performance of the stator core 8, it can be easily handled.

In the sixth embodiment, since the first and second stator cores are produced by laminating press-formed magnetic steel plates, the concave portions constituting the positioning grooves are simultaneously formed when the magnetic steel plates are press-formed. Then, the 1st and 2nd stator cores 9 and 10 with which the positional relationship of the circumferential direction of a teeth and a positioning groove is equal can be produced.
In the sixth embodiment, the positioning protrusion is provided on the inner peripheral surface of the frame and the positioning groove is provided on the outer peripheral surface of the first and second stator cores. However, the positioning groove is provided on the inner peripheral surface of the frame. The positioning protrusions may be provided on the outer peripheral surfaces of the first and second stator cores.

In the second to sixth embodiments, the lead wire drawing groove is recessed so as to penetrate the outer peripheral surface or inner peripheral surface of the core back of the first stator core in the axial direction. The hole may be drilled so as to penetrate the core back of the first stator core in the axial direction. In the present invention, this lead hole is also included in the lead wire lead groove.
Moreover, in the said Embodiment 2-6, although the lead wire drawing-out groove shall be recessedly provided so that it may penetrate to the outer peripheral surface or internal peripheral surface of the core back of a 1st stator core to an axial direction, The wire drawing groove may be recessed so as to penetrate the outer peripheral surface or inner peripheral surface of the core back of the second stator core in the axial direction.

Embodiment 7 FIG.
FIG. 8 is a schematic diagram showing the configuration of a hybrid engine assist system for a vehicle equipped with a turbocharger using a homopolar rotating machine according to Embodiment 7 of the present invention.

In FIG. 8, the vehicle hybrid engine assist system includes a generator motor 35 that is driven by the rotational torque of the engine 31 that is an internal combustion engine, and a turbocharger 40 that is connected to the exhaust system of the engine 31.
The generator motor 35 is connected via a belt 34 to a pulley 33 having a pulley 36 fixed to a crankshaft 32 of the engine 31. The generator motor 35 converts the driving force of the engine 31 transmitted through the belt 34 into AC power. This AC power is converted into DC power by an inverter 44 that is integrally attached to the opposite side of the pulley 36 of the generator motor 35, charges the battery 39, and is supplied to an in-vehicle load (not shown).

  The turbocharger 40 is fixed to the turbine 41 disposed in the exhaust system 38 of the engine 31, and the compressor 43 disposed in the intake system 37 of the engine 31, and coaxial with the rotation shaft 42. And a homopolar rotating machine 1 attached to the. The homopolar rotating machine 1 is interposed between the turbine 41 and the compressor 43 with the first stator core 9 facing the compressor 43. The lead wire of the multiphase coil 11 is drawn out to the first stator core 9 side and is electrically connected to the inverter 44 via the wiring 47. Further, the lead wire 18 of the field coil 12 is drawn out to the first stator core 9 side and is electrically connected to the drive circuit unit 45 via the wiring 47.

The control means 46 controls ON / OFF of the switching elements constituting the inverter 44 and controls the energization of the field coil 12 by the drive circuit unit 45.
Further, a thermistor 48 as a field coil temperature detecting means for detecting the temperature of the field coil 12 is disposed in the vicinity of the field coil 12 and outputs a detection signal to the control means 46.
In FIG. 8, carburetors, catalysts, and the like provided in the intake system 37 and the exhaust system 38 are omitted for convenience of explanation. Further, the rotating shaft 42 coincides with the rotating shaft 2 of the homopolar rotating machine 1.

Here, the intake gas A is supplied to the engine 31 via the intake system 37 and burned inside the engine 31. The exhaust gas B after combustion is exhausted to the outside through the exhaust system 38. The turbine 41 is driven by the exhaust gas B flowing through the exhaust system 38. Thereby, the compressor 43 fixed to the rotating shaft 42 of the turbine 41 is rotationally driven, and the intake gas A is supercharged to the atmospheric pressure or higher.
At this time, if the driver of the vehicle tries to accelerate by an accelerator operation, about 1 to 2 seconds until the engine 31 reaches a predetermined number of revolutions and the exhaust gas B obtains sufficient fluid power is sufficient. Power cannot be applied to the turbine 41, the reaction of the compressor 43 is delayed, and a so-called turbo lag phenomenon occurs.

  Therefore, DC power is supplied to the field coil 12 through the drive circuit unit 45 and the wiring 47. Further, the inverter 44 is switching-controlled by the control means 46 so that the DC power of the battery 39 is converted into AC power and supplied to the multiphase coil 11 of the homopolar rotating machine 1 via the wiring 47, and the homopolar rotating machine 1. Is driven. Thereby, even when the fluid power of the exhaust gas B is not sufficiently obtained at a low speed at which turbo lag occurs, the driving force is applied to the rotating shaft 42, the compressor 43 can be driven quickly, and the occurrence of turbo lag is suppressed.

  In the homopolar rotating machine 1 according to the seventh embodiment, since the refrigerant is circulated through the refrigerant flow passage 14 formed in the frame 13, the heat transmitted from the turbine 41 having a high temperature of about 1000 ° C. is circulated through the refrigerant. Heat can be absorbed by the refrigerant flowing through the passage 14. Thus, even if the homopolar rotating machine 1 is applied to the turbocharger 40, it is caused by the difference in thermal expansion coefficient between the iron-based parts such as the first and second stator cores 9 and 10 and the frame 13 and the field coil 12. Generation of thermal stress is suppressed, and durability can be enhanced.

  Moreover, since the 1st and 2nd stator cores 9 and 10 are produced by laminating | stacking a magnetic steel plate, the clearance gap between magnetic steel plates becomes thermal resistance, and the heat conduction of an axial direction falls. Therefore, the amount of heat transmitted from the turbine 41 to the field coil 12 is reduced, and the difference in thermal expansion coefficients between the iron-based components such as the first and second stator cores 9 and 10 and the frame 13 and the field coil 12 is reduced. Occurrence of the resulting thermal stress is suppressed.

Further, since the lead wire 18 of the field coil 12 is drawn out to the compressor 43 side of the homopolar rotating machine 1, the lead wire 18 is not exposed to a high temperature of about 1000 ° C. on the turbine 41 side. Therefore, thermal deterioration of the insulating film of the lead wire 18 is suppressed.
Moreover, since the lead wire of the multiphase coil 11 is drawn out to the compressor 43 side of the homopolar rotating machine 1, the thermal deterioration of the insulating coating of the lead wire of the multiphase coil 11 is suppressed.

  Further, since the lead wire 18 of the field coil 12 and the lead wire of the multiphase coil 11 are drawn to the compressor 43 side of the homopolar rotating machine 1, the field coil 12, the multiphase coil 11, and the wiring 47 are connected. Can be concentrated on one side in the axial direction of the homopolar rotating machine 1. Therefore, the axial distance between the blades of the turbine 41 and the compressor 43 can be shortened, and the reduction of the dangerous rotational speed due to the increase in the size of the turbocharger 40 can be suppressed.

Next, energization control to the field coil 12 by the control means 46 will be described.
First, the thermistor 48 is disposed in the vicinity of the field coil 12, detects the temperature of the field coil 12, and outputs a detection signal to the control means 46.
The control means 46 determines whether or not the temperature of the field coil 12 has reached the allowable upper limit value based on the detection signal of the thermistor 48. When the control means 46 determines that the temperature of the field coil 12 has reached the allowable upper limit value, the control means 46 controls the drive circuit unit 45 to cut off the energization of the field coil 12. If it is determined that the temperature of the field coil 12 has not reached the allowable upper limit value, energization to the field coil 12 is maintained.

  As described above, when the temperature of the field coil 12 reaches the allowable upper limit value, the energization to the field coil 12 is stopped, so that a situation where the temperature of the field coil 12 exceeds the allowable upper limit value can be avoided. Is done. Therefore, an excessive temperature rise of the field coil 12 is avoided, and heat caused by a difference in thermal expansion coefficient between the iron-based components such as the first and second stator cores 9 and 10 and the frame 13 and the field coil 12 is avoided. The generation of stress is suppressed, and the deterioration of the electrical insulation due to thermal deterioration of the insulating film of the conductor wire of the field coil 12 is suppressed.

  According to the seventh embodiment, the temperature of the field coil 12 can be managed so as not to exceed a predetermined temperature, for example, an allowable upper limit value. Therefore, the predetermined temperature is set to an upper limit value of the temperature at which the thermal deterioration of the insulating coating of the multiphase coil 11 and the field coil 12 is not promoted, and the iron parts such as the first and second stator cores 9 and 10 and the frame 13 and If the temperature is set such that the thermal stress caused by the difference in thermal expansion coefficient with the magnetic coil 12 does not become excessive, the insulation of the multiphase coil 11 and the field coil 12 can be achieved only by managing the temperature of the field coil 12. It is possible to avoid problems of thermal stress due to thermal degradation of the coating and thermal stress due to thermal expansion differences.

  In the seventh embodiment, the temperature of the field coil is detected using the thermistor. However, the field coil temperature detecting means is not limited to the thermistor that directly detects the temperature of the field coil. For example, a current detector that detects an energization current to the field coil may be used. That is, using the temperature dependency of the energizing current value of the field coil 12, the energizing current value (allowable lower limit value) when the temperature of the field coil reaches the allowable upper limit value is measured, If it is determined that the energization current value has reached the allowable lower limit value based on the output signal of the current detector, the energization to the field coil is cut off. maintain. This avoids a situation where the temperature of the field coil exceeds the allowable upper limit.

In each of the above embodiments, the multiphase coil is wound around the first and second stator cores by the concentrated winding method. However, the multiphase coil is distributed by the first and second fixed winding methods. It may be wound around the child iron core.
In each of the above embodiments, the ratio between the number of field poles and the number of slots is 4: 6, that is, the pole slot ratio is 2: 3. However, the pole slot ratio is not limited to 2: 3. For example, 4: 3 may be used.

Further, in each of the above embodiments, the outer diameter of the partition is assumed to match the outer diameter of the first and second rotor cores, but the outer diameter of the partition is not necessarily the same as that of the first and second rotor cores. It is not necessary to match the outer diameter.
Moreover, in each said embodiment, although a magnetic steel plate is used as a magnetic thin plate, a magnetic thin plate is not limited to a magnetic steel plate, For example, you may use an electromagnetic steel plate.
In each of the above embodiments, the first and second stator cores are configured by laminating magnetic steel plates. However, the first and second stator cores are added after insulating coating of iron powder. You may comprise with the compacting iron core produced by pressing.

  1, 1A, 1B, 1C, 1D, 1E Homopolar type rotary machine (magnetic inductor type rotary machine), 2 rotary shaft, 3 rotor, 4 1st rotor core, 4a salient pole, 5 2nd rotor core, 5a salient pole, 7 stator, 8 stator core, 9 first stator core, 9a core back, 9b teeth, 9c slot, 10 second stator core, 10a core back, 10b teeth, 10c slot, 11 polyphase Coil, 12 Field coil, 13 Frame, 14 Refrigerant flow path, 17, 17a, 17b, 17c, 17d, 17e, 17f Lead wire drawing groove, 18, 19, 20a, 20b, 21a, 21b, 22a, 22b, 23a , 23b, 24a, 24b, 25a, 25b, 26a, 26b, 27a, 27b Lead wire, 28 Positioning groove (engagement recess), 29 Positioning protrusion Engaging projection) 40 turbocharger 41 turbine, 42 rotation shaft, 43 compressor, 46 control unit, 48 a thermistor (field coil end detecting means).

Claims (8)

Each of the teeth that define a slot that opens to the inner peripheral side protrudes radially inward from the inner peripheral surface of the cylindrical core back, and a plurality of teeth are arranged at a predetermined pitch in the circumferential direction. A stator core having a pair of a first stator core and a second stator core that are manufactured, are axially separated from each other by a predetermined distance, and are coaxially arranged with the circumferential positions of the teeth aligned with each other, and the above A stator having a multiphase coil wound around the stator core;
The first stator core and the second stator core forming a pair are fitted in an externally fitted state, and the core backs of the first stator core and the second stator core are connected in the axial direction. A frame constituting a magnetic path,
A pair of the first rotor core and the second rotor core manufactured in the same shape in which the salient poles are arranged at equiangular pitches in the circumferential direction, the first stator core and the second A rotor that is positioned on the inner peripheral side of the two stator cores and is coaxially fixed to the rotating shaft with a half salient pole pitch shifted from each other in the circumferential direction, and rotatably accommodated in the frame;
The first stator core and the second stator core forming a pair are disposed between core backs, and the salient poles of the first rotor core and the salient poles of the second rotor core have different polarities. A field coil for generating a field magnetic flux,
A refrigerant flow passage is formed in the frame;
A lead-out lead groove is recessed in the inner peripheral surface of the frame,
A magnetic inductor type rotating machine characterized in that a lead wire of the field coil is drawn axially outward from the frame through the lead wire drawing groove. Each of the teeth that define a slot that opens to the inner peripheral side protrudes radially inward from the inner peripheral surface of the cylindrical core back, and a plurality of teeth are arranged at a predetermined pitch in the circumferential direction. A stator core having a pair of a first stator core and a second stator core that are manufactured, are axially separated from each other by a predetermined distance, and are arranged coaxially so that the circumferential positions of the teeth coincide with each other, and the above A stator having a multiphase coil wound around the stator core;
The first stator core and the second stator core forming a pair are fitted in an externally fitted state, and the core backs of the first stator core and the second stator core are connected in the axial direction. A frame constituting a magnetic path,
A pair of the first rotor core and the second rotor core manufactured in the same shape in which the salient poles are arranged at equiangular pitches in the circumferential direction, the first stator core and the second A rotor that is positioned on the inner peripheral side of the two stator cores and is coaxially fixed to the rotating shaft with a half salient pole pitch shifted from each other in the circumferential direction, and rotatably accommodated in the frame;
The first stator core and the second stator core forming a pair are disposed between core backs, and the salient poles of the first rotor core and the salient poles of the second rotor core have different polarities. And a field coil for generating a field magnetic flux,
A refrigerant flow passage is formed in the frame;
A lead wire lead-out groove is formed so as to penetrate through at least one of the first stator core and the second stator core in the axial direction;
A magnetic field characterized in that a lead wire of the field coil passes through the lead wire lead groove and is drawn axially outward from at least one of the first stator core and the second stator core. Inductor type rotating machine. The field coil is produced by winding one conductor wire into a cylindrical shape,
3. The magnetic inductor type rotating machine according to claim 1, wherein the lead wire is constituted by both ends of the conductor wire, and is led out from the same lead wire lead groove. The field coil is produced by winding a plurality of conductor wires into a cylindrical shape,
The lead wire is constituted by both ends of the plurality of conductor wires,
3. The magnetic inductor type according to claim 1, wherein a pair of lead wires formed by both ends of the same conductor wire are led out from the same lead wire lead groove. Rotating machine.   The lead wire lead-out groove is recessed at the radially outer position of the slot on the outer peripheral surface of at least one of the first stator core and the second stator core. The magnetic inductor type rotating machine according to any one of claims 2 to 4.   An engagement protrusion is formed on the inner peripheral surface of the frame and one of the core back outer peripheral surfaces of the first stator core and the second stator core, and an engagement recess is formed on the inner peripheral surface of the frame and the first The first stator core and the second fixed core are formed on the other of the core back outer peripheral surfaces of the stator core and the second stator core, and the frame engages the engaging protrusion and the engaging recess. The circumferential movement with respect to the core of the child is regulated, and the first stator core and the second stator core are fitted in an externally fitted state. The magnetic inductor type | mold rotary machine of any one of Claims. The magnetic inductor type rotating machine according to any one of claims 1 to 6,
A compressor fixed to one end of the rotating shaft and disposed in the intake system of the engine;
A turbine fixed to the other end of the rotating shaft and disposed in an exhaust system of the engine,
A turbocharger characterized in that the lead wire is drawn out to the compressor side. Field coil temperature detecting means for detecting the temperature of the field coil;
Based on the detection signal of the field coil temperature detection means, it is determined whether the temperature of the field coil has reached a predetermined temperature, and if it is determined that the temperature of the field coil has reached a predetermined temperature, Control means for stopping energization of the field coil;
The turbocharger according to claim 7, comprising:

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