JPWO2013157165A1 - Permanent magnet type rotating electric machine and manufacturing method thereof - Google Patents

Abstract

The rotating electrical machine 1 has a rotor 2 and a stator 3. Stator 3 includes a plurality of teeth 11 that are spaced apart from each other in the circumferential direction of rotor 2 and a plurality of inter-tooth connecting portions 12 that connect the radially inner ends of adjacent teeth 11. Surrounding the core body 13, an annular core body 13 surrounding the rotor 2, a plurality of permanent magnets 14 held in each tooth 11, a plurality of stator coils 15 provided in each tooth 11, respectively. And an annular core back 16 fitted on the outer peripheral portion of the core body 13 in a state.

Description

  The present invention relates to a permanent magnet type rotating electrical machine used as, for example, a motor or a generator, and a manufacturing method thereof.

  For example, in a permanent magnet type rotating electrical machine used as an industrial or in-vehicle motor, etc., there is a demand for downsizing, high speed, wide range of use speed, and the like.

  Conventionally, in order to meet these demands, a plurality of teeth are provided on the armature core at a substantially constant pitch in the circumferential direction, and permanent magnets are accommodated in the magnet accommodation grooves provided in the center of each tooth, and the permanent magnets are adjacent to each other. Have been proposed (see, for example, Patent Document 1).

  Conventionally, in order to facilitate manufacture, a rotating electrical machine in which an armature is configured by arranging a plurality of modules formed by winding a coil around a pair of divided teeth sandwiching a permanent magnet in an annular shape has been proposed (for example, Patent Document 2).

Japanese Patent Laid-Open No. 2002-199679 Special table 2009-509490

  However, in the conventional rotating electric machine shown in Patent Document 1, a plurality of teeth protrude from the inner peripheral portion of the cylindrical core back, and slots formed between the teeth are opened radially inward. The width of the open portion of the slot becomes narrow, and it becomes difficult to wind the coil around each tooth with high density. This not only takes time to manufacture the rotating electrical machine, but also reduces the torque density of the rotating electrical machine. It is also possible to roll the core back into a cylindrical shape after winding the coil around the teeth with the core back expanded in the direction in which the distance between each tooth is widened. Distortion tends to occur, making it difficult for the inner shape of the core back to approach a perfect circle. As a result, for example, cogging torque increases, and the operating characteristics of the rotating electrical machine deteriorate.

  Further, in the conventional rotating electric machine shown in Patent Document 2, since the armature is manufactured by arranging a plurality of modules in an annular shape, it becomes difficult to keep the inner shape of the armature in a perfect circle. The operating characteristics of the rotating electrical machine will deteriorate.

  The present invention has been made to solve the above-described problems, and provides a permanent magnet type rotating electrical machine capable of facilitating manufacture and improving operating characteristics, and a method for manufacturing the same. The purpose is to obtain.

  A permanent magnet type rotating electrical machine according to the present invention includes a rotor, a plurality of teeth arranged at intervals in the circumferential direction of the rotor, and a plurality of teeth that respectively connect radially inner ends of adjacent teeth. An annular core body that includes the intermediate connecting portion and surrounds the rotor, a plurality of permanent magnets held in each tooth, a plurality of stator coils respectively provided in each tooth, and a core body. And a stator having an annular core back fitted on the outer periphery of the core body in a state of surrounding the core body.

  The manufacturing method of the permanent magnet type rotating electrical machine according to the present invention includes a permanent magnet mounting step for holding the permanent magnet in the teeth, a coil mounting step for mounting the stator coil on the teeth from the radially outer side of the core body, and a permanent magnet mounting step. A core back mounting step is provided for fitting the core body inside the core back by inserting the core body inside the core back later and after the coil mounting step.

  According to the permanent magnet type rotating electrical machine and the manufacturing method thereof according to the present invention, the manufacturing can be facilitated and the operating characteristics can be improved.

It is sectional drawing which shows the permanent magnet type rotary electric machine by Embodiment 1 of this invention. It is sectional drawing which shows the core main body of FIG. It is sectional drawing which shows the core back | bag of FIG. It is a disassembled perspective view which shows a state when the permanent magnet and stator coil of FIG. 1 are attached to a core main body. It is sectional drawing which shows a state when the core main body of FIG. 1 is attached to a core back. It is sectional drawing which shows the permanent magnet type rotary electric machine by Embodiment 2 of this invention. It is sectional drawing which shows the core main body of FIG. It is a disassembled perspective view which shows a state when the permanent magnet and stator coil of FIG. 6 are attached to a core main body. It is a principal part perspective view which shows the core main body of a permanent magnet type rotary electric machine by Embodiment 3 of this invention, a permanent magnet, and a stator coil. It is a perspective view which shows the coil frame of FIG. It is sectional drawing which shows the permanent magnet type rotary electric machine by Embodiment 4 of this invention. It is sectional drawing which shows the core main body of FIG. It is sectional drawing which shows the permanent-magnet-type rotary electric machine by Embodiment 5 of this invention. It is sectional drawing which shows the core main body of FIG. FIG. 10 is a sectional view showing a permanent magnet type rotating electric machine according to a sixth embodiment. It is sectional drawing which shows the core back | bag of FIG. It is sectional drawing which shows the core main body of FIG. It is sectional drawing which shows the core main body of the permanent magnet type rotary electric machine by Embodiment 7 of this invention. It is sectional drawing which shows the core main body of the permanent magnet type rotary electric machine by Embodiment 8 of this invention. It is sectional drawing which shows the core main body of the permanent magnet type rotary electric machine by Embodiment 9 of this invention. It is sectional drawing which shows the core main body of the permanent magnet type rotary electric machine by Embodiment 10 of this invention. It is a principal part perspective view which shows the core main body cross-section member which comprises the core main body of the permanent magnet type rotary electric machine by Embodiment 11 of this invention. It is a front view which shows the 1st core main body cross-section member of FIG. It is a front view which shows the 2nd core main body cross-section member of FIG. It is a principal part perspective view which shows the core back cross-section member which comprises the core back of the permanent magnet type rotary electric machine by Embodiment 11 of this invention. It is a front view which shows the 1st core back cross-section member of FIG. It is a front view which shows the 2nd core back cross-section member of FIG. It is sectional drawing which shows the core back | bag of the permanent-magnet-type rotary electric machine by Embodiment 12 of this invention. It is sectional drawing which shows the core main body of the permanent magnet type rotary electric machine by Embodiment 12 of this invention. It is sectional drawing which shows the principal part of the stator of FIG. FIG. 31 is a graph showing a relationship between a core back thickness ratio t1 / t0 of the core back of FIG. 30 and an output of a rotating electrical machine as a motor. It is sectional drawing which shows the modification of Embodiment 13 of this invention. It is sectional drawing which shows the principal part of the stator of the rotary electric machine by Example 14A of this invention. It is sectional drawing which shows the principal part of the stator of the rotary electric machine by Example 14B of this invention. It is sectional drawing which shows the principal part of the stator of the rotary electric machine by the comparative example for comparing with Example 14A and Example 14B. It is a graph which shows the comparison result of the output of the rotary electric machine by each of Example 14A, Example 14B, and a comparative example.

Preferred embodiments of the present invention will be described below with reference to the drawings.
Embodiment 1 FIG.
1 is a cross-sectional view showing a permanent magnet type rotating electrical machine according to Embodiment 1 of the present invention. In the figure, a permanent magnet type rotating electrical machine 1 (hereinafter simply referred to as “rotating electrical machine 1”) is arranged on a rotor 2 and a radially outer side of the rotor 2, and a cylindrical stator surrounding the outer periphery of the rotor 2. 3.

  The rotor 2 is rotatable with respect to the stator 3 about the axis of the rotating electrical machine 1. The rotor 2 includes a columnar rotor body 4 and a plurality of salient pole portions 5 that protrude from the outer peripheral surface of the rotor body 4 and are spaced from each other in the circumferential direction of the rotor 2. Have. In this example, ten salient pole portions 5 are arranged at equal intervals in the circumferential direction of the rotor 2. The rotor 2 is configured by laminating a plurality of magnetic plates (such as electromagnetic steel plates) in the axial direction of the rotating electrical machine 1 (hereinafter simply referred to as “axial direction”).

  The stator 3 is arranged coaxially with the rotor 2. The stator 3 is separated from the annular core body 13 surrounding the rotor 2, the plurality of permanent magnets 14 and the plurality of stator coils 15 respectively provided on the core body 13, and the core body 13. And an annular core back 16 fitted to the outer periphery of the core body 13 in a state of surrounding the core body 13. In the rotating electrical machine 1, a rotating magnetic field is generated by energizing the stator coil 15, and the rotor 2 is rotated.

  FIG. 2 is a cross-sectional view showing the core body 13 of FIG. The core body 13 includes a plurality of teeth 11 that are spaced apart from each other in the circumferential direction of the rotor 2, and a plurality of inter-tooth connecting portions 12 that respectively connect the radially inner ends of the adjacent teeth 11. have. Each tooth 11 is arranged radially along the radial direction of the stator 3. Thereby, between the radial direction outer side edge parts of each tooth | gear 11 is widely open | released.

  Each inter-tooth connecting portion 12 is arranged in an arc shape with the thickness direction coinciding with the radial direction of the stator 3. The inner peripheral surface of the core body 13 is formed in a circular cross section by the teeth 11 and the inter-tooth connecting portions 12.

  In each tooth 11, a magnet housing groove 23 opened at the radially outer end of the tooth 11 is provided. The magnet housing groove 23 is provided in the tooth 11 with the depth direction coinciding with the radial direction of the stator 3. The permanent magnet 14 is housed in each magnet housing groove 23. In this example, the width dimension of the magnet accommodation groove 23 (that is, the dimension of the magnet accommodation groove 23 in the circumferential direction of the stator 3) is constant at any position in the depth direction of the magnet accommodation groove 23. Therefore, the permanent magnet 14 can be inserted into the magnet housing groove 23 from the open portion of the magnet housing groove 23.

  Each tooth 11 includes a pair of opposing wall portions 21 that sandwich the magnet housing groove 23 from both sides in the circumferential direction of the stator 3, and a radially inner end portion of the teeth 11 (that is, a radially inner end portion and a radial direction of the tooth 11). Among the outer end portions, a wall connecting portion 22 that connects the pair of opposing wall portions 21 to each other at an end portion different from the end portion provided with the open portion of the magnet housing groove 23 is provided. The inner surface of the magnet housing groove 23 is formed by a pair of opposing wall portions 21 and a wall connecting portion 22. The wall connecting portion 22 is arranged in an arc shape with the thickness direction coinciding with the radial direction of the stator 3. In this example, the thickness dimension of each wall connecting part 22 is the same as the thickness dimension of each inter-tooth connecting part 12.

  The core body 13 is configured by laminating a plurality of core body cross-sectional members produced by punching a magnetic plate (such as an electromagnetic steel plate) into a predetermined shape in the axial direction. Each core main body cross-sectional member includes a portion forming a cross section of each tooth 11 (a plurality of tooth cross-section forming portions), a portion forming a cross section of each inter-tooth connecting portion 12 (a plurality of inter-tooth connecting portion cross-section forming portions), and have. Each tooth cross-section forming portion has a portion forming a cross-section of the pair of opposing wall portions 21 (a pair of opposing wall cross-section forming portions) and a portion forming a cross-section of the wall connecting portion 22 (wall connecting portion cross-section forming portion). doing.

  As shown in FIG. 1, the permanent magnet 14 is accommodated in the magnet accommodation groove 23. Further, the permanent magnet 14 is disposed at the center in the width direction of the tooth 11. In the magnet housing groove 23, the permanent magnet 14 is fitted without a gap.

  The permanent magnet 14 is magnetized in the circumferential direction of the stator 3. Further, the magnetization directions of the permanent magnets 14 adjacent to each other are reversed with respect to the circumferential direction of the stator 3. In FIG. 1, the magnetization direction of the permanent magnet 14 is indicated by N and S polarities.

  FIG. 3 is a cross-sectional view showing the core back 16 of FIG. The core back 16 includes a plurality of thick portions 31 disposed at intervals in the circumferential direction of the stator 3 in a state where the core back 16 is disposed between the radially outer ends of the teeth 11 and a thick wall adjacent to each other. It has the some thin part 32 which connects the parts 31 each on the radial direction outer side rather than the teeth 11. FIG. Each thin portion 32 is disposed with its thickness direction aligned with the radial direction of the stator 3. In this example, the radially inner surface of each thin portion 32 is a flat surface, and the radially outer surface of each thin portion 32 is an arcuate curved surface.

  A plurality of recesses 33 into which the radially outer ends of the teeth 11 are fitted are provided in the inner peripheral portion of the core back 16 at intervals in the circumferential direction of the stator 3. Each of the recesses 33 is provided in the core back 16 with the depth direction coinciding with the radial direction of the stator 3. The inner surface of each recess 33 is formed by each thick portion 31 and each thin portion 32. In this example, the depth dimension of each recess 33 is larger than the thickness dimension of the thin portion 32. Moreover, in this example, the thickness dimension of the thin part 32 is made substantially the same as each thickness dimension of the connection part 12 between teeth, and the wall connection part 22. FIG.

  As shown in FIG. 1, the core main body 13 is fitted inside the core back 16 with the radially outer ends of the teeth 11 fitted in the recesses 33. In a state where the teeth 11 are fitted in the recess 33, a part of the permanent magnet 14 is inserted into the recess 33. The open portion of the magnet housing groove 23 is closed by the thin portion 32 when the radially outer end of the tooth 11 is fitted in the recess 33. Thereby, it is prevented that the permanent magnet 14 comes off from the open part of the magnet accommodation groove 23.

  The core back 16 is configured by laminating a plurality of core back cross-sectional members produced by punching a magnetic plate (such as an electromagnetic steel plate) into a predetermined shape in the axial direction. Each core-back cross-section member includes a portion that forms a cross section of each thick portion 31 (a plurality of thick portion cross-section formation portions), a portion that forms a cross section of each thin portion 32 (a plurality of thin-wall portion cross-section formation portions), have.

  FIG. 4 is an exploded perspective view showing a state when the permanent magnet 14 and the stator coil 15 of FIG. 1 are attached to the core body 13. The permanent magnet 14 is inserted into the magnet housing groove 23 from the radially outer side of the core body 13 through the open portion of the magnet housing groove 23. The stator coil 15 is attached to the teeth 11 from the radially outer side of the core body 13.

  The stator coil 15 is a cylindrical coil produced by winding a conducting wire. Further, the stator coil 15 is attached to each tooth 11 in a state where the teeth 11 are inserted inside the stator coil 15. By inserting the teeth 11 inside the stator coil 15, the permanent magnets 14 are prevented from coming out of the magnet housing grooves 23 in the axial direction.

  FIG. 5 is a cross-sectional view showing a state when the core body 13 of FIG. 1 is attached to the core back 16. The core body 13 is fitted inside the core back 16 in a state where the permanent magnet 14 and the stator coil 15 are respectively attached to the teeth 11. When the core body 13 is fitted inside the core back 16, the core body 13 is inserted inside the core back 16 along the axial direction. The core body 13 is inserted inside the core back 16 by shrink fitting or press fitting, for example.

  Next, a method for manufacturing the rotating electrical machine 1 will be described. First, the rotor 2, the core body 13, the plurality of stator coils 15, and the core back 16 are prepared in advance. A plurality of permanent magnets 14 are also prepared in advance by magnetizing a magnetic material.

  Thereafter, as shown in FIG. 4, the permanent magnet 14 is inserted into the magnet housing groove 23 through the open portion of the magnet housing groove 23 provided in the teeth 11 from the outside in the radial direction of the core body 13. Thereby, the permanent magnet 14 is hold | maintained in the teeth 11 (permanent magnet attachment process).

  Thereafter, as shown in FIG. 4, the stator coil 15 is attached to the teeth 11 while inserting the teeth 11 inside the stator coil 15 from the radially outer side of the core body 13 (coil attaching step).

  Thereafter, the permanent magnet attaching step and the coil attaching step are repeated, and the permanent magnet 14 and the stator coil 15 are attached to all the teeth 11.

  Thereafter, as shown in FIG. 5, the core body 13 to which the permanent magnet 14 and the stator coil 15 are attached is fitted inside the core back 16. At this time, the core body 13 is inserted in the axial direction inside the core back 16 while fitting the radially outer end of each tooth 11 into each recess 33 (core back mounting step). In this way, the stator 3 is completed.

  Thereafter, the rotating electrical machine 1 is manufactured by inserting the rotor 2 inside the stator 3 and rotatably supporting the rotor 2 with respect to the stator 3.

  In such a rotating electrical machine 1, an annular core body 13 having a plurality of teeth 11 and a plurality of inter-tooth connecting portions 12 that connect the radially inner ends of adjacent teeth 11 includes an annular core back. Since the core body 13 is removed from the core back 16, the space between the teeth 11 can be widely opened outward in the radial direction of the core body 13. Thereby, the stator coil 15 can be easily attached to the teeth 11, and the permanent magnet 14 can be easily inserted into the teeth 11. Thereby, manufacture of the stator 3 can be made easy and manufacture of the rotary electric machine 1 can be made easy. Further, since the space between the teeth 11 is wide open to the outside of the core body 13 in the radial direction, the stator coil 15 can be easily attached to the teeth 11 and the winding density of the stator coil 15 can be increased. . Thereby, the resistance value of the stator coil 15 can be kept low, and the copper loss can be reduced. Therefore, the torque density of the rotating electrical machine 1 can be improved. Furthermore, since the stator 3 can be manufactured without deforming the inner peripheral surface of the annular core body 13 prepared in advance, the shape of the inner peripheral surface of the stator 3 can be made close to a perfect circle. The manufacturing error of the rotating electrical machine 1 can be reduced. Thereby, the cogging torque can be reduced, and the operating characteristics of the rotating electrical machine 1 can be improved.

  Further, since the core back 16 is provided with a plurality of concave portions 33 into which the radially outer ends of the teeth 11 are respectively fitted, the positioning of the core body 13 with respect to the core back 16 is performed in the circumferential direction of the stator 3. This can be done more reliably. Moreover, the thickness dimension of the thin part 32 located in the radial direction outer side than the permanent magnet 14 can be made small, and it can suppress that a magnetic flux leaks to the radial direction outer side of the stator 3 rather than the permanent magnet 14. FIG. . Thereby, the torque density of the rotating electrical machine 1 can be further improved.

  Further, since the teeth 11 are provided with magnet housing grooves 23 that are opened at the radially outer ends of the teeth 11, the permanent magnets 14 can be inserted into the magnet housing grooves 23 from the radially outer side of the teeth 11. can do. Thereby, the permanent magnet 14 can be more easily accommodated in the teeth 11. Further, since the teeth 11 are not arranged on the outer side in the radial direction than the permanent magnet 14, the magnetic resistance on the outer side in the radial direction can be increased more than the permanent magnet 14, and it is difficult to pass the magnetic flux on the outer side in the radial direction than the permanent magnet 14. can do. Thereby, it can suppress that magnetic flux leaks to the radial direction outer side of the stator 3 rather than the permanent magnet 14, and can aim at the improvement of the torque density of the rotary electric machine 1 further.

  Further, in such a manufacturing method of the rotating electrical machine 1, the permanent magnet 14 is held in the teeth 11, the stator coil 15 is attached to the teeth 11 from the radially outer side of the core body 13, and then the inner side of the core back 16. Since the core main body 13 is fitted, the permanent magnet 14 and the stator coil 15 can be attached to the core main body 13 in a state in which the permanent magnet 14 is easily held in the tooth 11 and the stator coil 15 is easily attached to the tooth 11. . Thereby, manufacture of the rotary electric machine 1 can be made easy. In addition, since the stator coil 15 can be easily attached to the teeth 11, the winding density of the stator coil 15 can be increased, and the torque density of the rotating electrical machine 1 can be improved. Furthermore, since it is not necessary to deform the core body 13 when the stator 3 is assembled, the inner peripheral surface of the stator 3 can be brought close to a perfect circle, and the manufacturing error of the rotating electrical machine 1 can be reduced. Thereby, the cogging torque can be reduced, and the operating characteristics of the rotating electrical machine 1 can be improved.

  In the above example, the permanent magnet 14 is held in the teeth 11 by inserting the magnetized permanent magnet 14 into the magnet housing groove 23 in the magnet mounting step. A magnetic body is inserted into the magnet housing groove 23 to hold the magnetic body in the teeth 11, and then the permanent magnet 14 is held in the teeth 11 by making the magnetic body permanent magnet 14 by magnetization. You may do it.

Embodiment 2. FIG.
FIG. 6 is a sectional view showing a permanent magnet type rotating electric machine according to Embodiment 2 of the present invention. FIG. 7 is a cross-sectional view showing the core body 13 of FIG. In the figure, each tooth 11 is provided with a pair of protrusions (magnet removal prevention portions) 35 that engage with the permanent magnets 14 and prevent the permanent magnets 14 from coming off from the open portions of the magnet housing grooves 23. . Each projecting portion 35 individually protrudes from the pair of opposing wall portions 21 to the inside in the width direction of the magnet housing groove 23, and engages with the permanent magnet 14 on the radially outer side than the permanent magnet 14. In this example, each projection 35 is provided at the radially outer end of the tooth 11.

  FIG. 8 is an exploded perspective view showing a state when the permanent magnet 14 and the stator coil 15 of FIG. 6 are attached to the core body 13. The permanent magnet 14 is inserted into the magnet housing groove 23 along the axial direction. Thereby, each projection 35 is engaged with the permanent magnet 14 from the outside in the radial direction. The stator coil 15 is attached to the teeth 11 from the radially outer side of the core body 13. Other configurations and manufacturing methods are the same as those in the first embodiment.

  In such a rotating electrical machine 1, each tooth 11 is provided with a pair of protrusions 35 that engage with the permanent magnet 14 and prevent the permanent magnet 14 from coming off from the open portion of the magnet housing groove 23. The magnet 14 can be prevented from slipping out of the magnet housing groove 23 by the projections 35 in the radial direction and the stator coil 15 in the axial direction.

  Further, by inserting the permanent magnet 14 into the magnet housing groove 23, the protrusions 35 of the teeth 11 are engaged with the permanent magnet 14, so that the permanent magnet 14 can be simply inserted into the magnet housing groove 23. The permanent magnet 14 can be held in the teeth 11 so as not to come out of the magnet housing groove 23. Thereby, manufacture of the rotary electric machine 1 can be made still easier.

  Here, when the magnetized permanent magnets 14 are inserted into the magnet housing grooves 23 of the teeth 11, a magnetic repulsive force acts on the permanent magnets 14 in the direction of coming out of the magnet housing grooves 23. In the present embodiment, the permanent magnets 14 are prevented from coming out of the magnet housing grooves 23 by the projections 35 and the stator coils 15, so that the magnetized permanent magnets 14 can be accommodated even when subjected to a magnetic repulsive force. It becomes possible to insert into the groove 23. Thereby, it is not necessary to perform a magnetizing operation after the stator 3 is assembled, and the rotating electrical machine 1 can be further easily manufactured.

  In addition, when the non-magnetized magnetic material is inserted into the magnet housing groove 23 and then the magnetic material is used as the permanent magnet 14 by magnetization, a magnetizing yoke suitable for the structure of the stator 3 is required. Manufacturing cost will increase. Furthermore, if the magnetic material is magnetized while the magnetic material is inserted into the magnet housing groove 23, it becomes difficult to completely magnetize the end of the magnetic material due to the influence of leakage magnetic flux and the like. For this reason, the permanent magnet 14 having a high magnetization rate can be held in the tooth 11 by inserting the magnetized permanent magnet 14 into the magnet housing groove 23 to produce the stator 3. Thereby, the rotary electric machine 1 with a higher output than the rotary electric machine 1 produced by magnetizing the magnetic substance after holding the non-magnetized magnetic substance in the teeth 11 can be obtained.

  In the above example, the pair of protrusions 35 provided on the tooth 11 are engaged with the permanent magnet 14, but the protrusion 35 only needs to be engaged with the permanent magnet 14. The number of may be only one. In addition, a single belt-like plate in which the pair of protrusions 35 are connected to each other may be a magnet removal prevention part.

Embodiment 3 FIG.
FIG. 9 is a perspective view showing a main part of a core body 13, a permanent magnet 14, and a stator coil 15 of a permanent magnet type rotating electrical machine according to Embodiment 3 of the present invention. In the figure, the stator coil 15 is wound around an insulating cylindrical coil frame 41 made of a nonmagnetic material (for example, resin). The coil frame 41 is fitted and held in the teeth 11 with the teeth 11 inserted into the coil frame 41. The stator coil 15 is provided on the tooth 11 via the coil frame 41 while being wound around the coil frame 41.

  FIG. 10 is a perspective view showing the coil frame 41 of FIG. The coil frame 41 has a cylindrical section 42 having a rectangular cross section into which the teeth 11 are inserted, and a pair of opposing sections 43 provided to face each other at the opening of the cylindrical section 42. A plate-like protrusion (magnet removal prevention part) 43 a that protrudes in a direction approaching each other is provided at the tip of each facing part 43.

  As shown in FIG. 9, the coil frame 41 is fitted to the teeth 11 with a pair of facing portions 43 facing each other in the axial direction of the stator 3. At the radially outer end of the tooth 11, a space is formed between the pair of opposing wall portions 21 in which the protrusions 43 a are fitted. The coil frame 41 is fitted to the tooth 11 in a state in which each protruding portion 43 a is fitted between the pair of opposing wall portions 21. In a state where the coil frame 41 is fitted to the teeth 11, the projections 43 a are engaged with the permanent magnets 14 on the radially outer side than the permanent magnets 14, so that the permanent magnets 14 come out from the open portions of the magnet housing grooves 23. Is prevented, and the inner surface of the cylindrical portion 42 is engaged with the permanent magnet 14, thereby preventing the permanent magnet 14 from coming out of the magnet housing groove 23 in the axial direction.

  In the coil attachment process of attaching the stator coil 15 to the teeth 11, the coil frame 41 around which the stator coil 15 is wound is attached to the teeth 11 from the radially outer side of the core body 13 after the permanent magnet attachment process. The pair of protrusions 43 a of the frame 41 are engaged with the permanent magnet 14. Other configurations and manufacturing methods are the same as those in the first embodiment.

  In such a rotating electrical machine 1, a pair of coils that prevent the permanent magnet 14 from coming out of the open portion of the magnet housing groove 23 by engaging with the permanent magnet 14 on the cylindrical coil frame 41 around which the stator coil 15 is wound. Therefore, the permanent magnet 14 is prevented from coming out of the magnet housing groove 23 in both the radial direction and the axial direction of the stator 3 simply by fitting the coil frame 41 to the teeth 11. can do. Thereby, manufacture of the stator 3 can be made still easier and manufacture of the rotary electric machine 1 can be made still easier. Moreover, since each projection part 43a is comprised with the nonmagnetic material, the increase in the leakage magnetic flux on the radial direction outer side than the permanent magnet 14 can be suppressed, and the output fall of the rotary electric machine 1 can be suppressed. . Furthermore, the number of parts of the stator 3 and the number of assembly steps of the stator 3 can be reduced as compared with the case where the permanent magnet 14 is prevented from coming out of the magnet housing groove 23 by a member separate from the coil frame 41.

  In the above example, the pair of protrusions 43 a provided on the coil frame 41 are engaged with the permanent magnet 14, but the protrusion 43 a only needs to be engaged with the permanent magnet 14. The number of 43a may be only one. In addition, a single belt-like plate in which the pair of protrusions 43a are connected to each other may be a magnet removal prevention part.

Embodiment 4 FIG.
In the first embodiment, the magnet accommodation groove 23 provided in each tooth 11 is opened at the radially outer end of each tooth 11, but the magnet accommodation groove 23 provided in each tooth 11 is provided in the teeth 11. You may open | release at the radial direction inner side edge part.

  11 is a sectional view showing a permanent magnet type rotating electric machine according to Embodiment 4 of the present invention. FIG. 12 is a cross-sectional view showing the core body 13 of FIG. In the figure, each tooth 11 is provided with a magnet accommodation groove 23 opened at the radially inner end of the tooth 11. The permanent magnet 14 can be inserted into the magnet housing groove 23 from the open portion of the magnet housing groove 23.

  Each tooth 11 includes a pair of opposing wall portions 21 that sandwich the magnet housing groove 23 from both sides in the circumferential direction of the stator 3, and a radially outer end portion of the teeth 11 (that is, a radially inner end portion and a radial direction of the tooth 11). Among the outer end portions, a wall connecting portion 51 that connects the pair of opposing wall portions 21 to each other at an end portion different from the end portion provided with the open portion of the magnet housing groove 23 is provided. Other configurations and manufacturing methods are the same as those in the first embodiment.

  Thus, even if the magnet housing groove 23 provided in the tooth 11 is opened at the radially inner end of the tooth 11, the permanent magnet 14 can be easily inserted into the tooth 11. 1 can be easily manufactured. In addition, since the teeth 11 are not arranged radially inward of the permanent magnet 14, it is possible to make it difficult for magnetic flux to pass through radially inward of the permanent magnet 14. Thereby, it can suppress that magnetic flux leaks to the radial inside of the stator 3 rather than the permanent magnet 14, and can aim at the improvement of the torque density of the rotary electric machine 1 further.

Embodiment 5 FIG.
FIG. 13 is a sectional view showing a permanent magnet type rotating electric machine according to Embodiment 5 of the present invention. FIG. 14 is a cross-sectional view showing the core body 13 of FIG. In the figure, each tooth 11 has a pair of protrusions (magnet removal) that engage with the permanent magnet 14 accommodated in the magnet accommodation groove 23 to prevent the permanent magnet 14 from coming out of the open portion of the magnet accommodation groove 23. Prevention part) 52 is provided. Each protrusion 52 protrudes individually from the pair of opposing wall portions 21 to the inner side in the width direction of the magnet housing groove 23, and engages with the permanent magnet 14 on the radially inner side of the permanent magnet 14. In this example, each protrusion 52 is provided at the radially inner end of the tooth 11. Thereby, the width dimension of the open part of the magnet accommodation groove 23 is narrower than the width dimension of the permanent magnet 14. Other configurations are the same as those of the fourth embodiment.

  In the permanent magnet mounting step in the present embodiment, the permanent magnet 14 is inserted into the magnet housing groove 23 along the axial direction. Thereby, each protrusion 52 is engaged with the permanent magnet 14 from the inside in the radial direction. Other procedures of the manufacturing method are the same as those in the fourth embodiment.

  Thus, even when the magnet accommodation groove 23 is opened at the radially inner end of the tooth 11, the permanent magnet 14 is engaged with the permanent magnet 14 and the permanent magnet 14 comes out of the opened portion of the magnet accommodation groove 23. By providing the teeth 11 with a pair of protrusions 52 that prevent the permanent magnets 14 from coming out of the magnet housing grooves 23, the protrusions 52 in the radial direction and the stator coils 15 in the axial direction are prevented. can do. Accordingly, even when the magnetized permanent magnet 14 is inserted into the magnet housing groove 23 when the stator 3 is manufactured, the permanent magnet 14 can be easily prevented from coming out of the magnet housing groove 23. . Thereby, manufacture of the rotary electric machine 1 can be facilitated, and the permanent magnet 14 having a high magnetization rate can be held in the teeth 11, and the output of the rotary electric machine 1 can be improved.

Embodiment 6 FIG.
FIG. 15 is a sectional view showing a permanent magnet type rotating electrical machine according to the sixth embodiment. 16 is a cross-sectional view showing the core back 16 of FIG. 15, and FIG. 17 is a cross-sectional view showing the core body 13 of FIG. In the drawing, a plurality of core body cross-section members that are stacked in the axial direction to constitute the core body 13 have crimped portions (uneven portions) 61 that are fitted in the stacking direction (that is, the axial direction) of the core body cross-sectional members. Is provided. Further, a plurality of core back cross-section members that are stacked in the axial direction to form the core back 16 are each provided with a caulking portion (uneven portion) 61 that is fitted in the stacking direction (that is, the axial direction) of the core back cross-section members. It has been.

  The caulking portion 61 provided in each core main body cross-section member plastically deforms the material of the core main body cross-section member at a portion (wall connection portion cross-section formation portion) that forms a cross section of the wall connection portion 22 in each core main body cross-section member. Is formed. That is, the wall connecting portion 22 is provided with a caulking portion 61 formed by plastically deforming the material of each core body cross-sectional member.

  The caulking portion 61 provided in each core back cross-section member is formed by plastically deforming the material of the core back cross-section member in a portion (thin wall cross-section forming portion) that forms a cross section of the thin portion 32 in each core back cross-section member. Has been. That is, the thin portion 32 is provided with a caulking portion 61 formed by plastically deforming the material of each core back cross-section member.

  Here, when the respective materials of the core main body cross-sectional member and the core back cross-sectional member are plastically deformed, the magnetic permeability is lowered and the magnetic flux does not easily pass therethrough. In the present embodiment, since the caulking portion 61 provided in each of the wall connecting portion 22 and the thin portion 32 is formed by plastic deformation, the magnetic permeability decreases in each of the wall connecting portion 22 and the thin portion 32. Magnetic flux is difficult to pass. Other configurations are the same as those in the first embodiment.

  In such a rotating electrical machine 1, the caulking portion 61 formed by plastic deformation of the material of the core body cross-sectional member is provided in the wall connecting portion 22, and the caulking portion formed by plastic deformation of the material of the core back cross-sectional member. Since 61 is provided in the thin part 32, it is possible to make it difficult for the wall connecting part 22 and the thin part 32 to pass through the magnetic flux. Thereby, the quantity of the leakage magnetic flux which passes through each of the wall connection part 22 and the thin part 32 can be reduced, and the improvement of the output of the rotary electric machine 1 can be aimed at. In addition, each caulking portion 61 can increase the binding force between the core main body cross-section members and between the core back cross-section members, and the core main body cross-section members and the core back cross-section members are peeled off when the stator 3 is assembled. Prevention can be achieved.

Embodiment 7 FIG.
In the sixth embodiment, the caulking portion 61 is provided in the wall connecting portion 22, but the caulking portion 61 may be provided in the inter-tooth connecting portion 12.

  18 is a cross-sectional view showing a core body of a permanent magnet type rotating electrical machine according to Embodiment 7 of the present invention. The caulking portion 61 provided in each core main body cross-section member is formed by plasticizing the material of the core main body cross-section member in a portion forming the cross section of the inter-tooth connection portion 12 in each core main body cross-section member. It is formed by deforming. That is, the inter-tooth connecting portion 12 is provided with a caulking portion 61 formed by plastically deforming the material of each core body cross-sectional member. In this example, the caulking portion 61 is not provided in the wall connecting portion 22. Other configurations are the same as those of the sixth embodiment.

  Thus, by providing the caulking portion 61 formed by plastic deformation of the material of the core main body cross-sectional member in the inter-tooth connecting portion 12, it is possible to make it difficult for magnetic flux to pass through the inter-tooth connecting portion 12, and The amount can be reduced. Therefore, the output of the rotating electrical machine 1 can be improved.

Embodiment 8 FIG.
FIG. 19 is a cross-sectional view showing a core body of a permanent magnet type rotating electric machine according to Embodiment 8 of the present invention. The caulking portion 61 provided in each core body cross-section member is formed by plastically deforming the material of the core body cross-section member in each of the wall connection portion cross-section formation portion and the inter-tooth connection portion cross-section formation portion in each core main body cross-section member. Has been. That is, each of the wall connecting portion 22 and the inter-tooth connecting portion 12 is provided with a caulking portion 61 formed by plastically deforming the material of each core body cross-sectional member. Other configurations are the same as those of the sixth embodiment.

  Thus, by providing the caulking portion 61 formed by plastic deformation of the material of the core body cross-section member in each of the wall connecting portion 22 and the inter-tooth connecting portion 12, the wall connecting portion 22 and the inter-tooth connecting portion 12 can be provided. It is possible to make it difficult to pass the magnetic flux in each case, and it is possible to further reduce the amount of leakage magnetic flux. Therefore, the output of the rotating electrical machine 1 can be further improved. Moreover, since the number of the caulking portions 61 formed on the common core main body cross-sectional member can be increased, the binding force between the core main body cross-sectional members can be further improved. Thereby, when producing the stator 3, each core main body cross-section member can be made harder to peel off, and production of the stator 3 can be made still easier.

Embodiment 9 FIG.
In the sixth embodiment, the caulking portion 61 is provided in the wall connecting portion 22 of the core main body 13 in which the magnet housing groove 23 is opened at the radially outer end portion of the tooth 11. The caulking portion 61 may be provided in the wall connecting portion 51 of the core main body 13 where the magnet housing groove 23 is open at the portion.

  That is, FIG. 20 is a sectional view showing a core body of a permanent magnet type rotating electrical machine according to Embodiment 9 of the present invention. In the present embodiment, the magnet housing groove 23 is opened at the radially inner end portion of the tooth 11, and the wall connecting portion 51 is provided at the radially outer end portion of the tooth 11. The caulking portion 61 provided in each core main body cross-section member is formed by plastically deforming the material of the core main body cross-section member at a portion (wall connection portion cross-section formation portion) that forms a cross section of the wall connection portion 51. That is, the wall connecting portion 51 is provided with a caulking portion 61 formed by plastically deforming the material of each core main body cross-sectional member. Other configurations are the same as those of the fourth embodiment.

  Thus, even if the caulking portion 61 is provided in the wall connecting portion 51 of the core body 13 in which the magnet housing groove 23 is opened at the radially inner end portion of the tooth 11, it is difficult to pass the magnetic flux through the wall connecting portion 51. And the amount of leakage magnetic flux can be reduced. Therefore, the output of the rotating electrical machine 1 can be improved.

Embodiment 10 FIG.
FIG. 21 is a sectional view showing a core body of a permanent magnet type rotating electric machine according to Embodiment 10 of the present invention. The caulking portion 61 provided in each core body cross-section member is formed by plastically deforming the material of the core body cross-section member in each of the wall connection portion cross-section formation portion and the inter-tooth connection portion cross-section formation portion in each core main body cross-section member. Has been. That is, each of the wall connecting portion 51 and the inter-tooth connecting portion 12 is provided with a caulking portion 61 formed by plastically deforming the material of each core body cross-sectional member. Other configurations are the same as those of the ninth embodiment.

  Thus, by providing the caulking portion 61 formed by plastic deformation of the material of the core main body cross-section member in each of the wall connecting portion 51 and the inter-tooth connecting portion 12, the wall connecting portion 51 and the inter-tooth connecting portion 12 are provided. It is possible to make it difficult to pass the magnetic flux in each case, and it is possible to further reduce the amount of leakage magnetic flux. Therefore, the output of the rotating electrical machine 1 can be further improved. Moreover, since the number of the caulking portions 61 formed on the common core body cross-section member can be increased, the binding force between the core body cross-section members can be improved. Thereby, when manufacturing the stator 3, each core main body cross-section member can be made hard to peel off, and preparation of the stator 3 can be made still easier.

Embodiment 11 FIG.
FIG. 22 is a perspective view of a main part showing a core body cross-section member constituting core body 13 of the permanent magnet type rotating electric machine according to Embodiment 11 of the present invention. In the figure, the core main body 13 is configured by alternately stacking first and second core main body cross-sectional members 65 and 66 that are different from each other in the axial direction. The magnet housing groove 23 provided in the tooth 11 of the core body 13 is opened at the radially outer end of the tooth 11.

  FIG. 23 is a front view showing the first core body cross-section member 65 of FIG. The first core body cross-section member 65 connects the plurality of teeth cross-section forming portions 11a that form the cross section of each tooth 11 and the radially inner ends of the adjacent tooth cross-section forming portions 11a to each other. And a plurality of inter-tooth connecting portion cross-section forming portions 12a that form twelve cross-sections. In addition, the tooth cross-section forming portion 11a connects a pair of opposed wall cross-section forming portions 21a that form a cross section of the pair of opposed wall portions 21 and radially inner ends of the pair of opposed wall cross-sectional forming portions 21a. And a wall connecting portion cross-section forming portion 22 a that forms a cross section of the wall connecting portion 22.

  FIG. 24 is a front view showing the second core body cross-section member 66 of FIG. The second core main body cross-section member 66 includes a plurality of opposing wall section cross-section forming portions 21 a arranged at intervals from each other in accordance with the positions of the respective opposing wall section cross-section forming portions 21 a of the first core main body cross-section member 65. Have. Further, in the second core main body cross-section member 66, the inter-tooth connection portion cross-section formation portion 12a and the wall connection portion cross-section formation portion 22a of the first core main body cross-section member 65 are removed. That is, the second core main body cross-sectional member 66 is the opposing wall among the opposing wall cross-section forming portion 21a, the wall connecting portion cross-sectional forming portion 22a, and the inter-tooth connecting portion cross-sectional forming portion 12a of the first core main body cross-sectional member 65. Only the partial section forming portion 21a is left.

  Therefore, the inter-tooth connecting portion 12 and the wall connecting portion 22 of the core main body 13 are provided only in the layer where the first core main body cross-sectional member 65 is disposed. Moreover, in the layer in which the 2nd core main body cross-section member 66 in the connection part 12 between teeth and the wall connection part 22 is arrange | positioned, it is space.

  A caulking portion 61 formed by plastically deforming the material of each core main body cross-sectional member 65, 66 is provided in the central portion of each facing wall portion 21. The caulking portion 61 is fitted in the stacking direction of the core body cross-section members 65 and 66. Thereby, positioning between each core main body cross-section members 65 and 66 is performed.

  FIG. 25 is a perspective view of a main part showing a core back cross-section member constituting core back 16 of the permanent magnet type rotating electric machine according to Embodiment 11 of the present invention. In the figure, the core back 16 is formed by alternately stacking first and second core back cross-section members 67 and 68 different from each other in the axial direction.

  FIG. 26 is a front view showing the first core back cross-section member 67 of FIG. The first core-back cross-section member 67 connects the plurality of thick-wall section forming portions 31a that form the cross-section of each thick-wall section 31, and the thick-section cross-section forming sections 31a adjacent to each other. A plurality of thin-walled cross-section forming portions 32a that form a cross-section.

  27 is a front view showing the second core back cross-section member 68 of FIG. The second core back cross-section member 68 has a plurality of thick-wall cross-section forming portions 31a arranged at intervals from each other in accordance with the position of the thick-wall cross-section forming portion 31a of the first core back cross-section member 67. doing. Further, in the second core back cross-section member 68, the thin-wall section forming portion 32a of the first core back cross-section member 67 is removed. That is, in the second core back cross-section member 68, only the thick-wall cross-section formation portion 31a is left among the thick-wall cross-section formation portion 31a and the thin-wall cross-section formation portion 32a of the first core back cross-section member 67. It is a member.

  Accordingly, the thin portion 32 of the core back 16 is provided only in the layer where the first core back cross-section member 67 is disposed. Moreover, in the layer in which the 2nd core back cross-section member 68 in the thin part 32 of the core back 16 is arrange | positioned, it is space.

  A caulking portion 61 formed by plastically deforming the material of each of the core back cross-section members 67 and 68 is provided at the center of each thick portion 31. The caulking portion 61 is fitted in the stacking direction of the core back cross-section members 67 and 68. Thereby, positioning between each core back cross-section members 67 and 68 is performed. Other configurations are the same as those in the first embodiment.

  In such a rotating electrical machine 1, the core body 13 is configured by alternately laminating the first and second core body cross-sectional members 65, 66, and the first core body cross-sectional member 65 is formed with a cross section of the wall connecting portion. 22a and the inter-tooth connecting portion cross-section forming portion 12a are included, and in the second core main body cross-section member 66, the wall connecting portion cross-section forming portion 22a and the inter-tooth connecting portion cross-section forming portion 12a are excluded. A part of each of the part 22 and the connection part 12 between teeth can be made into space. Thereby, it is possible to make it difficult for the magnetic flux to pass through each of the wall connecting portion 22 and the inter-tooth connecting portion 12, and to greatly reduce the amount of leakage magnetic flux passing through each of the wall connecting portion 22 and the inter-tooth connecting portion 12. it can. Therefore, the output of the rotating electrical machine 1 can be further improved.

  The core back 16 is configured by alternately laminating the first and second core back cross-section members 67 and 68, and the first core back cross-section member 67 includes the thick-wall section forming portion 31 a and the thin-wall section. Since the forming portion 32a is included and the thin-walled cross-section forming portion 32a is removed from the second core back cross-section member 68, a part of the thin-walled portion 32 can be used as a space. Thereby, it is possible to make it difficult for the magnetic flux to pass through the thin portion 32 positioned on the radially outer side than the teeth 11, and the amount of leakage magnetic flux passing through the thin portion 32 can be greatly reduced. Therefore, the output of the rotating electrical machine 1 can be further improved.

  In the above example, the core body 13 is configured by alternately stacking the first and second core body cross-sectional members 65, 66. However, the first and second core body cross-sectional members 65, 66 are It is not limited to the structure which laminates | stacks alternately, For example, the 1st core main body cross-section member 65 is piled up on the both ends of what laminated | stacked the several 2nd core main body cross-section member 66 in the axial direction, and the core main body 13 is made. It may be configured.

  In the above example, the core back 16 is configured by alternately laminating the first and second core back cross-section members 67 and 68. However, the first and second core back cross-section members 67 and 68 are For example, the core back 16 is formed by stacking the first core back cross-section members 67 on both ends of the plurality of second core back cross-section members 68 laminated in the axial direction. It may be configured.

Embodiment 12 FIG.
FIG. 28 is a cross sectional view showing a core back 16 of a permanent magnet type rotating electric machine according to a twelfth embodiment of the present invention. FIG. 29 is a sectional view showing a core body 13 of a permanent magnet type rotating electric machine according to Embodiment 12 of the present invention. The plurality of core back cross-section members constituting the core back 16 and the plurality of core main body cross-section members constituting the core body 13 are produced by punching a magnetic plate (for example, an electromagnetic steel plate) having a predetermined thickness dimension t. Yes.

  A thickness dimension t1 (FIG. 28) of the thin portion 32 is set to be equal to or greater than the thickness dimension t of the core back cross-section member. A thickness dimension t2 (FIG. 29) of the inter-tooth coupling portion 12 and a thickness dimension t3 (FIG. 29) of the wall coupling portion 22 are set to be equal to or larger than the thickness dimension t of the core body cross-sectional member. That is, t1 ≧ t, t2 ≧ t, and t3 ≧ t. Other configurations are the same as those in the first embodiment.

  In such a rotating electrical machine 1, the thickness dimension t2 of the inter-tooth coupling portion 12 of the core body 13 and the thickness dimension t3 of the wall coupling portion 22 are set to be equal to or greater than the thickness dimension t of the core body cross-section member. Therefore, when punching out the magnetic plate to produce the core main body cross-sectional member, it is possible to suppress deformation of the portions of the core main body cross-sectional member that form the cross sections of the inter-tooth connecting portion 12 and the wall connecting portion 22. Thereby, the output of the rotary electric machine 1 can be improved.

  That is, when the magnetic plate is punched, if the thickness t2 of the inter-tooth connecting portion 12 and the thickness t3 of the wall connecting portion 22 are smaller than the thickness t of the electromagnetic plate, the magnetic plate is removed when punching the magnetic plate. In this embodiment, the thickness t2 of the inter-tooth coupling portion 12 and the thickness dimension t3 of the wall coupling portion 22 are set to be greater than or equal to the thickness dimension t of the magnetic plate. The deformation of the cross-sectional member can be suppressed. Since the inter-tooth connecting portion 12 and the wall connecting portion 22 form the inner peripheral surface of the stator 3, when the inter-tooth connecting portion 12 and the wall connecting portion 22 are deformed, the gap between the rotor 2 and the stator 3. It becomes difficult to narrow down. In the present embodiment, each deformation of the inter-tooth connecting portion 12 and the wall connecting portion 22 can be suppressed, so that the gap between the rotor 2 and the stator 3 can be narrowed. Output can be improved.

  Further, since the thickness dimension t1 of the thin portion 32 of the core back 16 is also set to be equal to or greater than the thickness dimension t of the magnetic plate, when the core back sectional member is manufactured by punching the magnetic plate, The deformation of the portions forming the respective cross sections of the thin-walled portion 32 can be suppressed. Thereby, the manufacturing error of the core back | bag 16 can be made small and the operating characteristic of the rotary electric machine 1 can be aimed at.

  In addition, if the thickness dimension t2 of the connection part 12 between teeth is set more than the thickness dimension t of a core main body cross-section member, a deformation | transformation of the connection part 12 between teeth can be suppressed, and the rotor 2 and stator 3 can be narrowed. Therefore, if the thickness dimension t2 of the inter-tooth coupling portion 12 is set to be equal to or greater than the thickness dimension t of the core body cross-section member, the thickness dimension t3 of the wall coupling portion 22 and the thickness dimension t1 of the thin portion 32 are the core. It may be smaller than the thickness dimension t of the main body cross-sectional member.

  Moreover, you may apply the structure of the caulking part 61 of Embodiment 6-8 to the core main body 13 and the core back 16 of Embodiment 2. FIG. Furthermore, the configuration of the caulking portion 61 of the ninth and tenth embodiments may be applied to the core body 13 and the core back 16 of the fifth embodiment.

Embodiment 13 FIG.
In the thirteenth embodiment, the output of the rotating electrical machine 1 according to the first embodiment when used as a motor was examined. 30 is a cross-sectional view showing a main part of the stator 3 of FIG. In FIG. 30, the thickness dimension of the thick part 31 is indicated by t0, the thickness dimension of the thin part 32 is indicated by t1, the thickness dimension of the inter-tooth connecting part 12 is indicated by t2, and the thickness dimension of the wall connecting part 22 is indicated by t3. Yes. The output of the rotating electrical machine 1 is changed by changing the ratio t1 / t0 of the thickness dimension t1 of the thin portion 32 to the thickness dimension t0 of the thick portion 31 (hereinafter referred to as “core back thickness ratio t1 / t0”) by simulation. While asking.

  FIG. 31 is a graph showing the relationship between the core back thickness ratio t1 / t0 of the core back 16 of FIG. 30 and the output of the rotating electrical machine 1 as a motor. In FIG. 31, the output of the rotating electrical machine 1 when the core back thickness ratio t1 / t0 is 1 is 1. As shown in FIG. 31, it can be seen that the output of the rotating electrical machine 1 improves as the core back thickness ratio t1 / t0 approaches zero. That is, in the configuration according to the first embodiment, it can be seen that the output of the rotating electrical machine 1 is improved as the thickness dimension t1 of the thin portion 32 is reduced. Further, if the thickness dimension t2 of the inter-tooth connecting portion 12 is reduced, the leakage magnetic flux between the teeth 11 can be reduced. Therefore, the output of the rotating electrical machine 1 reduces the thickness dimension t2 of the inter-tooth connecting portion 12. To improve it.

  When each of the thickness dimension t1 of the thin wall portion 32 and the thickness dimension t2 of the inter-tooth connecting portion 12 is reduced, the strength of each of the core body 13 and the core back 16 is weakened. Since the radially outer ends of the teeth 11 are respectively fitted, it is possible to suppress a decrease in strength of the stator 3 as a whole.

  Therefore, in the rotating electrical machine 1 according to the first embodiment, the thickness dimension t1 of the thin portion 32 is made smaller than the thickness dimension t0 of the thick portion 31, and the core back thickness ratio t1 / t0 is brought close to zero. By reducing the thickness t2 of the teeth connecting portion 12, the output of the rotating electrical machine 1 can be improved while ensuring the strength of the stator 3.

  In addition, the thickness dimension t1 of the thin part 32 may be the same as the thickness dimension t0 of the thick part 31, as shown in FIG. That is, the core back thickness ratio t1 / t0 may be 1. Even if it does in this way, although the output of the rotary electric machine 1 is inferior compared with the case where the thickness dimension t1 of the thin part 32 is smaller than the thickness dimension t0 of the thick part 31, manufacture can be made easy and operation | movement is possible. The effect described in Embodiment 1 that the characteristics can be improved can be obtained.

Embodiment 14 FIG.
In the fourteenth embodiment, the output of the rotating electrical machine 1 according to the second embodiment when used as a motor was examined. In the fourteenth embodiment, the output of the rotating electrical machine was examined while comparing the comparative example with Examples 14A and 14B, which are two configuration examples according to the second embodiment.

  FIG. 33 is a cross sectional view showing a main part of the stator 3 of the rotating electric machine according to Embodiment 14A of the present invention. In Example 14A, a minute gap exists between the inner surface of the recess 33 and the tooth 11. Further, in Example 14A, a pair of protrusions 35 individually protruding from the pair of opposing wall portions 21 to the inner side in the width direction of the magnet housing groove 23 are provided at the radially outer end portion of the teeth 11 as a magnet removal prevention portion. Yes. The pair of protrusions 35 are arranged so as to be separated from each other without being connected.

  FIG. 34 is a cross sectional view showing a main part of the stator 3 of the rotating electric machine according to Embodiment 14B of the present invention. Even in Example 14B, there is a minute gap between the inner surface of the recess 33 and the tooth 11. In Example 14B, unlike Example 14A, a single belt-like plate 71 formed by connecting a pair of protrusions individually protruding inward in the width direction of the magnet housing groove 23 from the pair of opposing wall portions 21 is removed from the magnet. It is provided in the radial direction outer side edge part of the teeth 11 as a prevention part. The other configuration is the same as that of Example 14A.

  In an actual rotating electrical machine, a minute gap may be generated between the tooth 11 and the inner surface of the recess 33 due to, for example, a dimensional error. In Example 14A and Example 14B, the rotating electrical machine is configured in consideration of such a minute gap generated between the tooth 11 and the inner surface of the recess 33.

  FIG. 35 is a cross-sectional view showing a main part of a stator of a rotating electrical machine according to a comparative example for comparison with Example 14A and Example 14B. In the comparative example, the teeth 11 and the core back 16 are integrated. Therefore, in the comparative example, there is no gap between the teeth 11 and the core back 16. Further, in the comparative example, the magnet removal preventing portion is not provided in the teeth 11, and the thin portion 32 is connected between the pair of opposing wall portions 21 at the radially inner end portion of each tooth 11, and the diameter of each tooth 11 is A wall connecting portion 22 is connected between the pair of opposing wall portions 21 at the outer end in the direction. The other configuration is the same as that of Example 14A.

  The output of the rotating electrical machine according to each of Example 14A, Example 14B, and Comparative Example was obtained by simulation. In the simulation, the thickness dimension t1 of the thin portion 32 in each of Example 14A, Example 14B, and Comparative Example is the same dimension.

  FIG. 36 is a graph showing a comparison result of the output of the rotating electrical machine according to each of Example 14A, Example 14B, and Comparative Example. In FIG. 36, the output of the rotating electrical machine according to the comparative example is set to 1, and the output of the rotating electrical machine according to each of Example 14A and Example 14B is shown as a ratio to the comparative example. As shown in FIG. 36, it can be seen that the output of the rotating electrical machine of Example 14A is higher than the outputs of the rotating electrical machines of Example 14B and the comparative example. This is because, in Example 14A, in addition to the gap between the inner surface of the recess 33 and the tooth 11, the pair of protrusions 35 are separated from each other, and thus compared to each of Example 14B and the comparative example. Thus, it is considered that the leakage magnetic flux on the radially outer side of the teeth 11 is reduced.

  For this reason, in the rotating electrical machine according to the embodiment 14A, not only can the permanent magnet 14 be prevented from being detached from the magnet housing groove 23 by the pair of protrusions 35, but also between the inner surface of the recess 33 and the teeth 11. As a result of the occurrence of a gap, the output of the rotating electrical machine can be improved.

  In the rotating electrical machine according to Example 14B, the output of the rotating electrical machine is inferior to that of Example 14A. However, compared with the rotating electrical machine according to the comparative example, the manufacturing can be facilitated and the operating characteristics can be improved. The effect described in the second embodiment can be obtained.

  DESCRIPTION OF SYMBOLS 1 Rotating electrical machine, 2 Rotors, 3 Stator, 11 teeth, 12 Teeth connection part, 13 Core main body, 14 Permanent magnet, 15 Stator coil, 16 Core back, 21 Opposite wall part, 22, 51 Wall connection part, 23 Magnet receiving groove, 31 Thick part, 32 Thin part, 33 Concave part, 35, 52 Protrusion part (magnet removal prevention part), 41 Coil frame, 43a Protrusion part (magnet removal prevention part), 61 Caulking part, 65 1st The core main body cross-sectional member, 66 2nd core main body cross-sectional member, 67 1st core back cross-sectional member, 68 2nd core back cross-sectional member.

Claims (13)

The rotor including a rotor, and a plurality of teeth arranged at intervals in the circumferential direction of the rotor and a plurality of inter-tooth connecting portions that respectively connect the radially inner ends of the teeth adjacent to each other. A plurality of permanent magnets respectively held in each of the teeth, a plurality of stator coils provided in each of the teeth, and the core body. A permanent magnet type rotating electrical machine comprising: a stator having an annular core back fitted on the outer periphery of the core body in a state of surrounding the core body.   The permanent magnet type rotating electrical machine according to claim 1, wherein the core back is provided with a plurality of recesses into which the radially outer ends of the teeth are respectively fitted.   The said tooth | gear is open | released in either the radial direction inner end part or the radial direction outer end part of the said teeth, and the magnet accommodation groove | channel which accommodates the said permanent magnet is provided. Item 5. The permanent magnet type rotating electric machine according to Item 2.   The magnet according to claim 3, wherein the teeth are provided with a magnet removal preventing portion that engages with the permanent magnets and prevents the permanent magnets from coming off from the open portions of the magnet housing grooves. Permanent magnet type rotating electric machine. The stator coil is provided on the teeth via the coil frame in a state of being wound around a cylindrical coil frame.
The said coil frame is provided with the magnet removal prevention part which engages with the said permanent magnet and prevents the said permanent magnet from coming off from the open part of the said magnet accommodation groove | channel. Permanent magnet type rotating electric machine. Each of the teeth includes a pair of opposing wall portions that sandwich the magnet housing groove from both sides in the circumferential direction of the stator, and an opening of the magnet housing groove among a radially inner end and a radially outer end of the tooth. A wall connecting portion that connects the pair of opposing wall portions at an end different from the end provided with the portion;
The core body is configured by laminating a plurality of core body cross-sectional members in the axial direction,
At least one of the inter-tooth connecting portion and the wall connecting portion is provided with a caulking portion that is formed by plastically deforming the material of each core main body cross-sectional member and fitted between the core main body cross-sectional members. The permanent magnet type rotating electric machine according to any one of claims 3 to 5, wherein the permanent magnet type rotating electric machine is provided. Each of the teeth includes a pair of opposing wall portions that sandwich the magnet housing groove from both sides in the circumferential direction of the stator, and an opening of the magnet housing groove among a radially inner end and a radially outer end of the tooth. A wall connecting portion that connects the pair of opposing wall portions at an end different from the end provided with the portion;
The core body is configured by laminating a plurality of core body cross-sectional members in the axial direction,
Any one of the plurality of core main body cross-sectional members is a first core main body cross-sectional member including a portion forming a cross section of the inter-tooth connecting portion and a portion forming a cross section of the wall connecting portion,
Any of the plurality of core main body cross-sectional members includes a second core main body cross-sectional member from which at least one of a portion forming a cross-section of the inter-tooth connecting portion and a portion forming a cross-section of the wall connecting portion is removed. The permanent magnet type rotating electrical machine according to any one of claims 3 to 5, wherein the permanent magnet type rotating electrical machine is provided. The core back includes a plurality of thin portions that connect a plurality of thick portions disposed between radially outer ends of the teeth and a plurality of adjacent thick portions on a radially outer side than the teeth. And a plurality of core back cross-sectional members are laminated in the axial direction,
A portion that forms a cross section of the thin portion in each of the core back cross-section members has a caulking portion that is formed by plastically deforming the material of each of the core back cross-section members and is fitted between the core back cross-section members. The permanent magnet type rotating electrical machine according to any one of claims 1 to 7, wherein the permanent magnet type rotating electrical machine is provided. The core back includes a plurality of thin portions respectively connecting a plurality of thick portions disposed between radially outer ends of the teeth and a plurality of adjacent thick portions on the radially outer side from the teeth. And a plurality of core back cross-sectional members are laminated in the axial direction,
One of the plurality of core back cross-sectional members is a first core back cross-sectional member including a portion that forms a cross section of the thin portion,
Any one of the plurality of core back cross-sectional members is a second core back cross-sectional member from which a portion forming a cross section of the thin portion is removed. The permanent magnet type rotating electrical machine according to claim 1. The core body is configured by laminating a plurality of core body cross-sectional members in the axial direction,
10. The permanent magnet type rotating electrical machine according to claim 1, wherein a thickness dimension of the inter-tooth connecting portion is equal to or greater than a thickness dimension of the core main body cross-sectional member. A manufacturing method of a permanent magnet type rotating electrical machine for manufacturing the permanent magnet type rotating electrical machine according to claim 1,
A permanent magnet mounting step for holding the permanent magnet in the teeth;
A coil mounting step of mounting the stator coil on the teeth from the outside in the radial direction of the core main body; and the core main body is inserted inside the core back after the permanent magnet mounting step and after the coil mounting step. A method of manufacturing a permanent magnet type rotating electrical machine, comprising: a core back mounting step of fitting the core body inside the core back. It is a manufacturing method of the permanent magnet type rotating electrical machine according to claim 11,
In the permanent magnet attaching step, the permanent magnet rotation is characterized in that the permanent magnet is inserted into a magnet receiving groove provided in the tooth, thereby engaging the magnet removal preventing portion of the tooth with the permanent magnet. Electric manufacturing method. It is a manufacturing method of the permanent magnet type rotating electrical machine according to claim 11,
In the permanent magnet mounting step, the permanent magnet is inserted into the magnet housing groove from an open portion of the magnet housing groove opened at the radially outer end of the teeth to hold the permanent magnet in the teeth,
In the coil mounting step, after the permanent magnet mounting step, a cylindrical coil frame around which the stator coil is wound is mounted on the teeth from the outside in the radial direction of the core body, thereby preventing the coil frame from coming off the magnet. A method of manufacturing a permanent magnet type rotating electrical machine, wherein the part is engaged with the permanent magnet.

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