JP2008167598A - Rotating electric machine stator and rotating electric machine using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a stator of a rotary electric machine, which can securely store a cassette coil in a slot part. <P>SOLUTION: The stator 70 is provided with a plurality of teeth 10 projected to an inner peripheral side and a yoke part 20 connecting a plurality of teeth 10. The stator is also provided with a circular stator core 30 where a plurality of slot parts 40 is formed between a plurality of teeth 10, and the cassette coil 50 where holes 53 inserted into the teeth 10 are formed. The holes 53 of the cassette coil 50 are engaged with the teeth 10 from the inner peripheral side. The cassette coil 50 is provided with a bobbin 54 and a coil 60 wound to the bobbin 54. The bobbin 54 comprises a support part 52 supporting the coil 60 in the slot part 40. A space 41 where the support part 52 is permitted to deform to a yoke part 20-side is arranged in the slot part 40. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a stator for a rotating electrical machine and a rotating electrical machine using the same, and more particularly to a stator for a rotating electrical machine in which a cassette coil is fitted to a tooth portion and a rotating electrical machine using the stator.

Conventionally, rotating electrical machines are disclosed in, for example, Japanese Patent Application Laid-Open No. 11-289694 (Patent Document 1), Japanese Patent Application Laid-Open No. 2003-134702 (Patent Document 2), and Japanese Patent Application Laid-Open No. 2000-197319 (Patent Document 3). .
JP-A-11-289694 JP 2003-134702 A JP 2000-197319 A

  Patent Document 1 discloses a cassette coil type concentrated winding motor. In patent document 2, the motor provided with the space which accept | permits a deformation | transformation of a coil support part is disclosed. Patent Document 3 discloses a technique that includes a recess in a slot.

  In the prior art, it is necessary to wind the coil at a high density in order to reduce the size of the motor. However, when wound at a high density, the bobbin that supports the coil is deformed when the cassette coil is attached, and the cassette coil may not fit in the slot and may come out to the rotor side.

  Accordingly, the present invention has been made to solve the above-described problems, and relates to a rotating electrical machine stator in which a cassette coil can be securely stored in a slot, and a rotating electrical machine including the stator.

  A stator of a rotating electrical machine according to the present invention has a plurality of teeth portions protruding toward an inner peripheral side and a yoke portion connecting the plurality of teeth portions, and a plurality of slot portions are formed between the plurality of teeth portions. An annular stator core, and a cassette coil in which a hole to be inserted into the tooth portion is formed. The hole of the cassette coil fits into the teeth portion from the inner peripheral side, the cassette coil has a bobbin and a coil wound around the bobbin, and the bobbin includes a support portion that supports the coil in the slot portion, and the slot The part is provided with a space that allows the support part to be deformed toward the yoke part side.

  In the stator of the rotating electrical machine configured as described above, even when the bobbin is deformed, the slot portion is provided with a space that allows the support portion to deform toward the yoke portion side. Deformation can be absorbed in this space. As a result, the cassette coil can be securely stored in the slot portion.

  Preferably, the angle A formed by the teeth portion and the yoke portion is larger than the angle B formed by the surface of the bobbin contacting the teeth portion and the support portion. In this case, the above space can be configured with certainty.

  A rotating electrical machine according to the present invention includes a stator of any of the above rotating electrical machines and a rotor disposed so as to be surrounded by the stator. In this case, the cassette coil can be reliably accommodated in the slot, and a high-output rotating electrical machine can be provided.

  According to the present invention, it is possible to provide a stator for a rotating electrical machine that can securely store a cassette coil in a slot portion, and a rotating electrical machine using the stator.

  Embodiments of the present invention will be described below with reference to the drawings. In the following embodiments, the same or corresponding parts are denoted by the same reference numerals, and description thereof will not be repeated.

  FIG. 1 is a cross-sectional view of a rotating electrical machine according to an embodiment of the present invention. Referring to FIG. 1, rotating electric machine 1 includes a stator core 30 and a rotor 120 surrounded by stator core 30. The rotor 120 is attached to the shaft 110 and can rotate with the shaft 110.

  A permanent magnet is embedded in the rotor 120, and the rotor 120 rotates when the permanent magnet magnetically acts on the stator 70.

  The stator 70 is a so-called concentrated winding stator, and includes a yoke portion 20 that forms a peripheral portion of the stator and a teeth portion 10 that protrudes toward the inner peripheral side with respect to the yoke portion 20. A plurality of cassette coils 50 are fitted to the tooth portion 10. The cassette coil 50 is fitted in the tooth portion 10 and is located in the slot portion 40. In this embodiment, a concentrated winding rotating electric machine having six teeth portions is shown, but the present invention is not limited to this, and a stator core 30 having more teeth portions 10 or fewer teeth portions 10 is provided. Also good. Further, the outer periphery of the yoke portion 20 is not completely circular, and various shapes such as an ellipse and a polygon can be adopted. The stator core 30 is made of an electromagnetic steel plate or magnetic powder.

  The stator 70 includes a stator core 30 and a cassette coil 50 that is fitted to the stator core 30. The teeth portion 10 is inserted into the hole 53 of the cassette coil 50. The cassette coil 50 is inserted into the tooth portion 10 from the inner peripheral side. The side surface 11 and the top surface 13 of the tooth portion 10 protrude from the bottom surface 12 of the yoke portion 20, and the bobbin 54 is wound around the side surface 11. A coil 60 is wound around the cassette coil 50.

  FIG. 2 is an enlarged view of a portion surrounded by II in FIG. Referring to FIG. 2, the stator core 30 has a continuous annular shape that is not interrupted. The stator core 30 includes a yoke portion 20 that is an outer peripheral portion, and a teeth portion 10 that protrudes from the yoke portion 20 toward the inner peripheral side. The bottom surface 12 is inclined toward the outer peripheral side with respect to a reference surface 15 orthogonal to the side surface 11, and a space 41 is formed by this inclination. A coil can be dropped into the space 41.

  In FIG. 2, the coil wound around the bobbin 54 is not shown. The bobbin 54 made of an insulator has a base portion 51 that defines the hole 53 and a support portion 52 as a flange portion that extends from the base portion 51 in the outer peripheral direction. A coil is wound around a space 55 surrounded by the support portion 52. The bobbin 54 exposes the top surface of the tooth portion 10. The side surface 11 is substantially parallel to the radial direction of the stator core 30.

  FIG. 3 is a cross-sectional view for explaining the angle formed between the tooth portion 10 and the yoke portion 20. Referring to FIG. 3, the angle formed between side surface 11 defining tooth portion 10 and bottom surface 12 defining yoke portion 20 is A.

  In addition, the angle formed between the surface of the bobbin 54 that contacts the tooth portion 10 and the support portion 52 is B, and the angle A is larger than the angle B. The bottom surface 12 defining the yoke portion 20 has a linear shape in the cross section shown in FIG. 3, but is not limited thereto, and may be formed in an arc shape.

  FIG. 4 is a cross-sectional view showing the coil 60 wound around the tooth portion 10 in detail. As shown in FIG. 4, the bobbin 54 is in contact with the edge portion 19 where the side surface 11 and the bottom surface 12 intersect. Thereby, the assembly position is constant regardless of the deformation of the support portion 52. Furthermore, since the bottom surface 12 on the side of the yoke portion 20 is inclined, a space 41 is provided for allowing this deformation to escape even if the support portion 52 of the bobbin 54 is deformed. Therefore, the bobbin 54 is prevented from protruding to the inner peripheral side. A coil 60 made of enameled wire is wound around the space 55, and a magnetic field is generated when a current flows through the coil 60.

  FIG. 5 is a perspective view showing a first step of the method of manufacturing the rotating electrical machine according to the embodiment of the present invention. 6 is a cross-sectional view taken along line VI-VI in FIG. With reference to FIGS. 5 and 6, first, the bobbin 54 is prepared. The bobbin 54 is made of, for example, an insulating resin. Further, a special coating may be applied to the inner surface or the outer surface of the bobbin 54. The bobbin 54 includes a base portion 51 and a support portion 52 that extends from the base portion 51 to the outer periphery. A coil is wound in a space surrounded by the support portion 52 and the base portion 51. Base portion 51 is configured to surround hole 53. The hole 53 is a through hole, and has a size that extends in one direction and can receive the tooth portion.

  FIG. 7 is a perspective view showing a second step of the method of manufacturing the rotating electrical machine according to the embodiment of the present invention. 8 is a cross-sectional view taken along line VIII-VIII in FIG. 7 and 8, when coil 60 is wound around bobbin 54, bobbin 54 is deformed by the winding force of coil 60. That is, the bobbin 54 is widened in the teeth insertion direction, and the support portion is inclined. Referring to FIG. 4, when teeth portion 10 is fitted in hole 53 of bobbin 54 as described above, bobbin 54 comes into contact with edge portion 19 of stator core 30. Further, since the slot portion 40 is provided with a space 41 for allowing the bobbin to bulge, the support portion 52 and the coil 60 enter the space. As a result, the bobbin 54 can be prevented from protruding toward the rotor.

  That is, the shape of the slot portion 40 of the stator core 30 is adjusted so that the assembly position does not change due to the deformation of the bobbin 54. Specifically, the shape takes into account the deformation of the bobbin 54. Due to the deformation, the position of the cassette coil 50 moves to the inner diameter side, and interference with the rotor can be prevented.

  In the present invention, the stator 70 includes the stator core 30, the coil 60, and the bobbin 54 as an insulator. The insulator forms the bobbin 54, and the coil 60 is wound around the bobbin 54 serving as an insulator. The cassette coil 50 is defined. The coil is formed first, and this is assembled to the stator core 30.

  The stator according to the present invention and the rotating electric machine using the stator can be used for a drive motor and a generator of an electric vehicle (EV), a hybrid vehicle (HV), a fuel cell vehicle (FCHV), etc., for example. Moreover, it can be used for a cell motor, an alternator and the like. Furthermore, it can also be employed in a small motor such as a power steering motor or a power window motor in a vehicle.

  The stator core 30 is circular in this embodiment, but may be a polygon such as a hexagon. Further, the number of the tooth portions 10 is not limited to that shown in this embodiment.

  In the present invention, the shape of the slot portion 40 of the stator core 30 is a shape that can absorb the deformation of the cassette coil 50. Moreover, even if the cassette coil 50 is deformed, the core shape does not change the assembling position.

  The rotating electrical machine according to the present invention has a plurality of teeth 10 projecting toward the inner peripheral side, and a yoke 20 connecting the plurality of teeth 10, and a plurality of slots between the plurality of teeth 10. An annular stator core 30 in which 40 is formed, and a cassette coil 50 in which a hole 53 to be inserted into the tooth portion 10 is formed. The hole 53 of the cassette coil 50 fits into the teeth portion 10 from the inner peripheral side. The cassette coil 50 includes a bobbin 54 and a coil 60 wound around the bobbin 54. The bobbin 54 includes a support portion 52 that supports the coil 60 in the slot portion 40. The slot portion 40 is provided with a space 41 that allows the support portion 52 to be deformed toward the yoke portion 20 side. The angle A formed between the tooth portion 10 and the yoke portion 20, that is, the angle A formed between the side surface 11 and the bottom surface 12, is the angle B formed between the surface where the bobbin 54 contacts the tooth portion 10 and the support portion 52, that is, the coil 60. It is larger than the angle B formed by the side surface 11 and the support portion 52 in a state before winding.

  In the present invention, the cassette coil 50 is inserted up to the edge portion 19 so that the edge portion 19 and the cassette coil 50 come into contact with each other, and the assembly position can be determined with reference to the contact point.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

It is sectional drawing of the rotary electric machine according to embodiment of this invention. It is a figure which expands and shows the part enclosed by II in FIG. 4 is a cross-sectional view for explaining an angle formed between a tooth portion 10 and a yoke portion 20. FIG. 4 is a cross-sectional view showing in detail a coil 60 wound around a tooth portion 10. FIG. It is a perspective view which shows the 1st process of the manufacturing method of the rotary electric machine according to embodiment of this invention. It is sectional drawing along the VI-VI line in FIG. It is a perspective view which shows the 2nd process of the manufacturing method of the rotary electric machine according to embodiment of this invention. It is sectional drawing along the VIII-VIII line in FIG.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 Rotating electrical machine, 10 teeth part, 11 side surface, 12 bottom surface, 13 top surface, 20 yoke part, 30 stator core, 40 slot part, 41 space, 50 cassette coil, 51 base part, 52 support part, 53 hole, 54 bobbin, 110 shaft, 120 rotor.

Claims (3)

An annular stator core having a plurality of tooth portions projecting to the inner peripheral side, and a yoke portion connecting the plurality of tooth portions, and a plurality of slot portions formed between the plurality of tooth portions;
A cassette coil formed with a hole to be inserted into the teeth portion,
The hole of the cassette coil fits into the teeth part from the inner peripheral side,
The cassette coil has a bobbin and a coil wound around the bobbin,
The bobbin includes a support part that supports the coil in the slot part,
A stator of a rotating electrical machine, wherein the slot portion is provided with a space that allows the support portion to deform toward the yoke portion side.   2. The stator of a rotating electrical machine according to claim 1, wherein an angle A formed by the yoke portion and the teeth portion is larger than an angle B formed by a surface of the bobbin contacting the teeth portion and the support portion.   A rotating electrical machine comprising the stator of the rotating electrical machine according to claim 1 or 2 and a rotor disposed so as to be surrounded by the stator.

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