JP5553241B2 - Rotating electric machine - Google Patents

Description

  The present invention relates to a rotating electrical machine.

  Conventionally, a permanent magnet synchronous motor in which a permanent magnet is disposed on a rotor has been used as a drive source in various fields such as an electric vehicle and a hybrid vehicle. In such a permanent magnet synchronous motor, while obtaining a large torque by performing the strong field control, the amount of magnetic flux generated between the stator and the rotor is reduced by performing the weak field control, thereby improving the maximum rotational speed. Has been proposed (see, for example, Patent Document 1).

  The rotary motor of Patent Document 1 includes a rotor, a field yoke (field magnetic pole), and a field coil. By supplying current to the field coil, an annular magnetic path is formed by the rotor, the stator, and the field yoke. Then, by adjusting the amount of current supplied to the field coil and adjusting the amount of magnetic flux passing through the rotor, it is possible to perform strong field control and weak field control, and obtain a large torque and improve the maximum rotational speed. Can do.

JP 2008-43099 A

  By the way, the field coil is wound around a field coil bobbin. For this reason, in a rotary motor, the physique in the direction along the axis of the shaft in a rotary motor will become large by the amount which requires the space for arrange | positioning the bobbin for field coils.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to provide a rotating electrical machine capable of reducing the size of the rotating electrical machine in the direction along the axis of the shaft. .

  In order to achieve the above-mentioned object, the invention according to claim 1 is arranged on a rotor that is rotatably supported by a shaft and has a magnetic salient pole part, and radially outside the salient pole part of the rotor. A stator core having a plurality of stator teeth projecting toward the shaft, an armature coil bobbin into which the stator teeth are inserted, an armature coil concentratedly wound on an outer periphery of the armature coil bobbin, A rotating electrical machine comprising a magnetic path forming member that forms a magnetic field path together with at least the rotor and the stator core in accordance with energization of the magnetic coil, wherein the armature coil bobbin is wound by the armature coil Each of the stators is configured by a cylindrical coil winding portion that is formed and a pair of flanges that restrict the movement of the stator core in the radial direction in the armature coil. A flange located radially outwardly of the bobbin for the armature coils provided on the Isu, the field coil is the gist that is wound while being hooked around the axis of the shaft.

  According to the present invention, since the field coil is wound around the flange located on the radially outer side of each armature coil bobbin while being wound around the axis of the shaft, The field coil can be arranged while effectively utilizing the dead space existing on the outer side in the radial direction, and the field coil bobbins can be reduced as much as possible. As a result, in the rotating electrical machine, the space for arranging the field coil bobbins can be reduced as much as possible, and the size of the rotating electrical machine in the direction along the axis of the shaft can be reduced.

  According to a second aspect of the present invention, in the first aspect of the present invention, the flange on which the field coil is wound around the bobbin for the armature coil has an engagement concave portion with which the field coil is engaged. The gist is that it is formed.

  According to the present invention, when the field coil is wound around the flange, the field coil is engaged with the engaging recess, so that the field coil is engaged with the flange by engaging the field coil with the engaging recess. Is positioned with respect to. Therefore, the field coil can be easily wound on the flange.

  According to a third aspect of the present invention, in the first or second aspect of the present invention, the flange on which the field coil of the armature coil bobbin is wound protrudes radially outward, and the shaft The gist of the present invention is that a pair of restricting projections are provided apart from each other in the axial direction.

  According to the present invention, the pair of restricting protrusions can restrict the field coil from falling off the flange.

  According to this invention, the physique in the direction along the axis of the shaft in the rotating electrical machine can be reduced in size.

The sectional side view of the motor in an embodiment. The longitudinal cross-sectional view of a motor. The sectional side view which expands and shows a part of motor. (A) is the perspective view which looked at the bobbin for armature coils from the one end opening part side, (b) is the perspective view which looked at the bobbin for armature coils from the other end opening part side. The perspective view which shows the field pole in another embodiment.

Hereinafter, an embodiment in which the present invention is embodied in a motor (rotary electric motor) as a rotating electrical machine will be described with reference to FIGS.
As shown in FIG. 1, the housing 11 of the motor 10 includes a cylindrical core back 12, a bottomed cylindrical first housing 13 connected to one end of the core back 12 (left end in FIG. 1), and a core back. 12 and a second housing 14 having a bottomed cylindrical shape connected to the other end (right end in FIG. 1). The first housing 13 and the second housing 14 are made of a nonmagnetic material. The core back 12 is a magnetic body, and in this embodiment, is formed from a powder-molded magnetic body (SMC: Soft Magnetic Compositions). A through hole 13 a is formed in the bottom wall of the first housing 13. A main motor part M is accommodated in the housing 11.

  A shaft 15 that constitutes a part of the main motor part M is accommodated in the core back 12. The shaft 15 is formed of a soft magnetic material (for example, iron or silicon steel) and has a substantially cylindrical shape. The shaft 15 is rotatably supported by the first housing 13 and the second housing 14 via bearings 16 and 17. One end of the shaft 15 (left end in FIG. 1) protrudes out of the housing 11 through the through hole 13a.

  A stator 20 (stator) that constitutes a part of the main motor portion M is fixed to the inner peripheral surface of the core back 12. The stator 20 includes an annular stator core 21 fixed to the inner peripheral surface of the core back 12 and an armature coil 22. The core back 12 covers the outer peripheral surface of the stator core 21 over the entire circumference, and the outer peripheral surface of the stator core 21 and the inner peripheral surface of the core back 12 are in close contact with each other. For this reason, the stator core 21 and the core back 12 are magnetically connected. The stator core 21 is configured by laminating a plurality of steel plates in a direction along the axis L of the shaft 15.

  As shown in FIG. 2, the stator core 21 is provided with a plurality of stator teeth 21 a protruding toward the shaft 15 at equal intervals in the circumferential direction of the stator core 21. The front end surfaces of the stator teeth 21a are all located on the same circumferential surface. Each stator tooth 21a is equipped with an armature coil bobbin 51 made of an insulating resin material. The armature coil 22 is formed by winding an armature coil conductor 22a made of a conductive metal material (copper in this embodiment) around the armature coil bobbin 51 a plurality of times by concentrated winding. . The armature coil 22 is in any one of the U phase, the V phase, and the W phase, and is supplied with currents having different phases, thereby generating a rotating magnetic field.

  As shown in FIG. 1, a rotor 30 (rotor) that constitutes a part of the main motor portion M is provided inside the stator 20. The rotor 30 has a rotor core 31 fixed to the shaft 15. The rotor core 31 can rotate integrally with the shaft 15 around the axis L of the shaft 15. The outer peripheral surface of the shaft 15 and the inner peripheral surface of the rotor core 31 are in close contact with each other. For this reason, the shaft 15 and the rotor core 31 are magnetically connected. The rotor core 31 is configured by laminating a plurality of steel plates made of a soft magnetic material in a direction along the axis L. Therefore, in the rotor core 31, the magnetic flux flows more easily in the radial direction and the circumferential direction of the rotor core 31 perpendicular to the axis L than in the direction along the axis L.

  Further, the length of the rotor core 31 in the direction along the axis L is the same as the length of the stator core 21 in the direction along the axis L. Therefore, the coil end of the armature coil 22 in the direction along the axis L protrudes outward from both ends of the rotor core 31.

  As shown in FIG. 2, the rotor core 31 is provided with a plurality of rotor teeth 31 a as convex pole portions protruding outward in the radial direction at equal intervals in the circumferential direction of the rotor core 31. All the tip surfaces of the rotor teeth 31a are located on the same circumferential surface. A slight gap is formed between the front end surface of each rotor tooth 31a and the front end surface of the stator tooth 21a. The rotor teeth 31a and the stator teeth 21a are magnetically connected through this gap.

Therefore, in the present embodiment, the main motor portion M is configured by the shaft 15, the stator 20, and the rotor 30.
As shown in FIG. 1, a first field magnetic pole 41 for generating a field magnetic flux is disposed at one end opening of the core back 12. The first field magnetic pole 41 includes an annular first field core 42 and a first field coil 43 as a field coil. The first field core 42 is configured by laminating a plurality of steel plates made of a magnetic material in a direction along the axis L. A first field coil bobbin 44 is fixed to an end face 42 a of the first field core 42 opposite to the first housing 13. The first field coil 43 is formed by winding a first field coil lead wire 43a made of a conductive metal material (copper in this embodiment) around the first field coil bobbin 44 a plurality of times. ing.

  The first field core 42 is fixed to the core back 12 by fitting an outer peripheral portion 42 b of the first field core 42 into a recess 12 a that is recessed in one end opening of the core back 12. In a state where the first field core 42 is fixed to the core back 12, the outer peripheral portion 42 b of the first field core 42 is in close contact with the core back 12. For this reason, the first field core 42 and the core back 12 are magnetically connected. The shaft 15 is inserted inside the first field core 42, and a slight gap is formed between the inner peripheral surface of the first field core 42 and the outer peripheral surface of the shaft 15. The first field core 42 and the shaft 15 are magnetically connected via this gap.

  A second field magnetic pole 46 for generating a field magnetic flux is disposed at the other end opening of the core back 12. The second field magnetic pole 46 includes an annular second field core 47 and a second field coil 48 as a field coil. The second field core 47 is configured by laminating a plurality of steel plates made of a magnetic material in a direction along the axis L. A second field coil bobbin 49 is fixed to an end face 47 a of the second field core 47 opposite to the second housing 14. The second field coil 48 is formed by winding a second field coil conductor 48a made of a conductive metal material (copper in this embodiment) around the second field coil bobbin 49 a plurality of times. ing.

  The second field core 47 is fixed to the core back 12 by fitting the outer peripheral portion 47 b of the second field core 47 into a recess 12 b that is recessed in the other end opening of the core back 12. In a state where the second field core 47 is fixed to the core back 12, the outer peripheral portion 47 b of the second field core 47 is in close contact with the core back 12. For this reason, the second field core 47 and the core back 12 are magnetically connected. The shaft 15 is inserted inside the second field core 47, and a slight gap is formed between the inner peripheral surface of the second field core 47 and the outer peripheral surface of the shaft 15. The second field core 47 and the shaft 15 are magnetically connected via this gap.

Next, the armature coil bobbin 51 will be described in detail.
As shown in FIGS. 4A and 4B, the armature coil bobbin 51 includes a rectangular cylindrical coil winding portion 52 around which the armature coil conductor 22 a is wound, and a coil winding portion 52. A square annular first flange 53 extending outward from the entire circumference of the opening edge of the one end opening 52a, and a square annular second flange 54 extending outward from the entire circumference of the opening edge of the other end opening 52b; have. That is, the first flange 53 and the second flange 54 are a pair of flanges formed on the outer peripheral surface of the coil winding portion 52 so as to be separated from each other in the axial direction of the coil winding portion 52.

  The armature coil 22 is formed by winding the armature coil lead wire 22a in a concentrated winding in a region sandwiched between the first flange 53 and the second flange 54 on the outer peripheral surface of the coil winding portion 52. ing. The first flange 53 and the second flange 54 restrict the movement of the coil winding portion 52 in the armature coil 22 in the axial direction (the radial direction of the stator core 21 in the armature coil 22).

  The stator teeth 21 a can be inserted into the coil winding part 52 from the one end opening 52 a side of the coil winding part 52. The length of the coil winding portion 52 in the direction along the axial direction of the coil winding portion 52 is shorter than the length of the stator teeth 21 a in the protruding direction, and the stator teeth 21 a are located inside the coil winding portion 52. By being inserted, the armature coil bobbin 51 is mounted on the stator teeth 21a.

  In a state where the armature coil bobbin 51 is mounted on each stator tooth 21 a, the first flange 53 and the second flange 54 are provided so as to extend parallel to each other along the axis L of the shaft 15. The first flange 53 is located on the radially outer side than the second flange 54. The length of the first flange 53 along the axis L of the shaft 15 is longer than the length of the second flange 54 along the axis L of the shaft 15.

  One end surface 53a on the radially outer side of the first flange 53, which protrudes radially outward near one end of the first flange 53 along the axis L of the shaft 15, and extends along the axis L of the shaft 15. A first restricting protrusion 61 and a second restricting protrusion 62 are provided as a pair of restricting protrusions that are separated in the direction.

  A surface 61a of the first restriction projection 61 opposite to the second restriction protrusion 62 has a first side edge 53c of the first flange 53 extending in a direction along the axis L of the shaft 15 in the first flange 53, and The second side edge portion 53d is provided so as to be connected to the third side edge portion 53e that connects one end portions of the second side edge portion 53d. As shown in FIG. 3, a surface 62 a of the second restriction projection 62 opposite to the first restriction protrusion 61 is provided so as to be continuous with the one end opening 52 a of the coil winding portion 52.

  As shown in FIG. 4A, a plurality of first recesses as engagement recesses are formed in the region between the first restriction protrusion 61 and the second restriction protrusion 62 on the one end surface 53 a of the first flange 53. The engaging recess 71 is formed so as to be continuous in the direction along the axis L of the shaft 15. Each first engaging recess 71 is formed to extend linearly so as to connect the first side edge 53 c and the second side edge 53 d of the first flange 53. Each first engaging recess 71 is recessed so as to be curved in an arc from one end surface 53a of the first flange 53 toward the other end surface 53b side of the first flange 53 on the coil winding portion 52 side.

  In the direction along the axis L of the shaft 15, the first engagement recess 71 located at the most end among the first engagement recesses 71 faces the second restriction protrusion 62 in the first restriction protrusion 61. It is provided so as to be continuous with the surface 61b. Further, in the direction along the axis L of the shaft 15, the first engagement recess 71 located at the most other end of the first engagement recesses 71 is the first restriction protrusion 61 in the second restriction protrusion 62. It is provided so that it may continue to the surface 62b which opposes.

  One end surface 53 a of the first flange 53, which protrudes radially outward toward the other end of the first flange 53 in the direction along the axis L of the shaft 15, and is separated in the direction along the axis L of the shaft 15. A third restriction protrusion 66 and a fourth restriction protrusion 67 are provided as a pair of restriction protrusions.

  A surface 66a of the third restriction projection 66 opposite to the fourth restriction projection 67 is a fourth side connecting the other end portions of the first side edge 53c and the second side edge 53d of the first flange 53. It is provided so as to continue to the edge 53f. Further, a surface 67 a of the fourth restriction projection 67 opposite to the third restriction protrusion 66 is provided so as to be continuous with the one end opening 52 a of the coil winding portion 52.

  A plurality of second engagement recesses 72 serving as engagement recesses are formed on the axis L of the shaft 15 in an area sandwiched between the third restriction protrusions 66 and the fourth restriction protrusions 67 on the one end surface 53 a of the first flange 53. It is formed so as to be continuous in the direction along. Each second engaging recess 72 is formed to extend linearly so as to connect the first side edge 53c and the second side edge 53d of the first flange 53. Each of the second engaging recesses 72 is recessed so as to be curved in an arc from the one end surface 53a of the first flange 53 toward the other end surface 53b of the first flange 53 on the coil winding portion 52 side.

  In the direction along the axis L of the shaft 15, the second engagement recess 72 located at the other end among the second engagement recesses 72 is opposed to the fourth restriction protrusion 67 in the third restriction protrusion 66. It is provided so as to be continuous with the surface 66b. In addition, in the direction along the axis L of the shaft 15, the second engagement recess 72 located at the most end of each second engagement recess 72 is connected to the third restriction protrusion 66 in the fourth restriction protrusion 67. It is provided so as to be continuous with the facing surface 67b.

  As shown in FIG. 2, each armature coil bobbin 51 is arranged substantially concentrically around the axis L of the shaft 15. The first engaging recess 71 and the second engaging recess 72 of each armature coil bobbin 51 have a third field coil conductor 76a made of a conductive metal material (copper in this embodiment). The fourth field coil conductor 77a is wound around the axis L of the shaft 15 so as to be engaged with the first engagement recesses 71 and the second engagement recesses 72.

  As shown in FIG. 3, the third field coil conducting wire 76 a is wound around each first engaging recess 71, and subsequently, the third field wound around the first engaging recess 71. It is wound a plurality of times so as to pass through the recesses 761a formed between the magnetic coil conductors 76a. Therefore, the third field coil 76 is formed between the first restricting protrusion 61 and the second restricting protrusion 62. That is, the third field coil 76 is disposed on the outer side in the radial direction than the armature coil 22.

  The fourth field coil conducting wire 77a is wound around each second engaging recess 72, and subsequently, the fourth field coil conducting wire 77a wound around the second engaging recess 72. It is wound a plurality of times so as to pass through each recess 771a formed between them. Therefore, the fourth field coil 77 is formed between the third restriction protrusion 66 and the fourth restriction protrusion 67. That is, the fourth field coil 77 is disposed on the outer side in the radial direction than the armature coil 22.

  Next, the operation of the motor 10 of the present embodiment will be described focusing on the magnetic path (field magnetic flux flow) formed when current is supplied to the field coils 43, 48, 76, 77. A terminal block T (indicated by a two-dot chain line in FIG. 1) for supplying a current to each field coil 43, 48, 76, 77 is provided on the outer peripheral surface of the housing 11, and for each field coil. The starting ends (not shown) of the conducting wires 43a, 48a, 76a, 77a are drawn out of the housing 11 and electrically connected to the terminal block T.

  As shown in FIG. 1, the field magnetic flux generated in the first field core 42 by supplying current to the field coils 43 and 76 flows toward the shaft 15 as indicated by the arrow Y1. The field magnetic flux flows to the shaft 15 through a magnetic gap (gap). Further, the field magnetic flux flows through the shaft 15 in the direction of the axis L as indicated by the arrow Y2, and flows in the direction orthogonal to the axis L of the shaft 15 as indicated by the arrow Y3, thereby causing the rotor core 31 (rotor teeth 31a) to flow. It flows to the outer diameter side and passes through the stator core 21 (stator teeth 21a). Further, the field magnetic flux is guided toward the first field magnetic pole 41 through the core back 12 as indicated by an arrow Y4.

  In this way, a field magnetic path is formed by the first field core 42, the shaft 15, the rotor 30, the stator 20 (stator core 21), and the core back 12. Therefore, in this embodiment, the core back 12, the shaft 15, and the first field core 42 function as a magnetic path forming member that forms a field magnetic path together with the rotor 30 and the stator 20 (stator core 21).

  Similarly, the field magnetic flux generated in the second field core 47 by supplying current to the field coils 48 and 77 flows toward the shaft 15 as indicated by the arrow Y11. The field magnetic flux flows to the shaft 15 through a magnetic gap (gap). Further, the field magnetic flux flows through the shaft 15 in the direction of the axis L as indicated by the arrow Y12, and flows in the direction perpendicular to the axis L of the shaft 15 as indicated by the arrow Y13, thereby causing the rotor core 31 (rotor teeth 31a) to flow. It flows to the outer diameter side and passes through the stator core 21 (stator teeth 21a). Further, the field magnetic flux is guided toward the second field magnetic pole 46 through the core back 12 as indicated by an arrow Y14.

  In this way, a field magnetic path is formed by the second field core 47, the shaft 15, the rotor 30, the stator 20 (stator core 21), and the core back 12. Therefore, in this embodiment, the core back 12, the shaft 15, and the second field core 47 function as a magnetic path forming member that forms a field magnetic path together with the rotor 30 and the stator 20.

  Thus, in the motor 10 of the present embodiment, an annular (loop-shaped) magnetic path (flow of field magnetic flux) is formed, and the rotor teeth 31a of the rotor 30 have the polarity of N pole by the field magnetic flux. Thus, the rotor teeth 31a (field magnetic flux) have the same function as the permanent magnet disposed on the rotor in the permanent magnet synchronous motor.

  Moreover, in the motor 10 of this embodiment, the field magnetic flux can be increased by increasing the amount of current flowing through each field coil 43, 48, 76, 77, and a larger torque can be obtained. On the other hand, in the motor 10 of this embodiment, the field flux can be reduced by reducing the amount of current flowing through each field coil 43, 48, 76, 77 during high-speed rotation, and the maximum rotational speed can be improved. it can. That is, in the motor 10 of this embodiment, the maximum torque and the maximum rotation speed can be improved only by the strong field control. Therefore, in the motor 10 of this embodiment, field-weakening control required when a permanent magnet is disposed on the rotor 30 is not necessary, and the configuration can be simplified.

  Of the field coils 43, 48, 76, and 77 required for generating the field magnetic flux in the first field core 42 and the second field core 47, the third field coil 76 and the fourth field magnet are used. A coil 77 is wound around the first flange 53 of each armature coil bobbin 51. For this reason, the third field coil conductor 76a and the fourth field coil conductor 77a, which are necessary for generating sufficient field magnetic flux in the first field core 42 and the second field core 47, are provided in the first field core. The field coil bobbin 44 and the second field coil bobbin 49 need not be wound. As a result, the size of the first field coil bobbin 44 and the second field coil bobbin 49 in the direction along the axis L of the shaft 15 is suppressed, and the motor 10 moves in the direction along the axis L of the shaft 15. The physique is suppressed.

In the above embodiment, the following effects can be obtained.
(1) Among the field coils 43, 48, 76, 77, the third field coil conductor 76 a and the fourth field coil conductor 77 a forming the third field coil 76 and the fourth field coil 77 are provided. The armature coil bobbins 51 are wound around the first flange 53 positioned on the radially outer side while being wound around the axis L of the shaft 15. Therefore, the field coils 76 and 77 can be arranged while effectively using the dead space existing outside the armature coil bobbin 51 in the housing 11 in the radial direction, and the field coil bobbins can be reduced as much as possible. . As a result, the space for arranging the field coil bobbins in the housing 11 can be reduced as much as possible, and the size of the motor 10 in the direction along the axis L of the shaft 15 can be reduced.

  (2) The first flange 53 is formed with a first engagement recess 71 and a second engagement recess 72 with which the third field coil conductor 76a and the fourth field coil conductor 77a are engaged. Therefore, when the third field coil conductor 76a and the fourth field coil conductor 77a are wound around the first flange 53, the third field coil conductor 76a and the fourth field coil conductor 77a are the first. Engaged with the engagement recess 71 and the second engagement recess 72. For this reason, the third field coil conductor 76a and the fourth field coil conductor 77a are engaged with the first engagement recess 71 and the second engagement recess 72 by the engagement of the third field coil conductor 76a and the fourth field coil conductor 77a. The fourth field coil conductor 77 a is positioned with respect to the first flange 53. Therefore, the third field coil conductor 76a and the fourth field coil conductor 77a can be easily aligned and wound around the first flange 53.

  (3) Near the one end of the first flange 53 in the direction along the axis L of the shaft 15, the first restriction projection 61 and the second protrusion protrude outward in the radial direction and are separated in the direction along the axis L of the shaft 15. A restricting protrusion 62 is provided. Further, the third flanges 66 and the fourth protrusions 66 project outward in the radial direction toward the other end in the direction along the axis L of the shaft 15 in the first flange 53 and are separated in the direction along the axis L of the shaft 15. A restricting protrusion 67 is provided. Therefore, the first restricting protrusion 61 and the second restricting protrusion 62 can restrict the third field coil conducting wire 76a from dropping out of the first flange 53. The protrusion 66 and the fourth restricting protrusion 67 can restrict the fourth field coil conducting wire 77 a from dropping out of the first flange 53.

In addition, you may change the said embodiment as follows.
In the embodiment, the first field pole 41 and the second field pole 46 may be configured as the field pole 90 shown in FIG. As shown in FIG. 5, the field pole 90 includes a field core 91 and a field coil 92 made of a magnetic material. The field core 91 is formed in an annular shape and has a fixed portion 91a for inserting the shaft 15, and a plurality of arm portions orthogonal to the axis L from the fixed portion 91a and extending radially outward from the axis L. 91b. Each arm part 91b is arrange | positioned at equal intervals. In each arm portion 91b, a field coil 92 is formed by winding a conducting wire on the shaft 15 (fixed portion 91a) side. According to this, the field coil bobbin can be eliminated, and the size of the motor 10 in the direction along the axis L of the shaft 15 can be further reduced.

  In the embodiment, the first field coil 43 and the second field coil 48 may be deleted. In this case, it is necessary that the third field coil 76 and the fourth field coil 77 can generate a sufficient field magnetic flux in the first field core 42 and the second field core 47. According to this, the field coil bobbin can be eliminated, and the size of the motor 10 in the direction along the axis L of the shaft 15 can be further reduced.

  In the embodiment, the rotor core 31 is configured by laminating a plurality of steel plates (electromagnetic steel plates), but is not limited thereto, and the rotor core 31 may be configured by a magnetic material such as SMC or an iron ingot. Similarly, the field cores 42 and 47 may be made of a magnetic material such as SMC or an iron ingot.

In the embodiment, any or all of the restricting protrusions 61, 62, 66, 67 may be deleted. Thereby, the shaping | molding of a bobbin can be made easy.
In the embodiment, the engaging recesses 71 and 72 may be deleted.

In the embodiment, each armature coil bobbin 51 may be separated on the inner diameter side and the outer diameter side. Thereby, the shaping | molding of a bobbin can be made easy.
In the embodiment, the number of stator teeth 21a of the stator 20 may be changed as appropriate. Further, the number of rotor teeth 31a of the rotor 30 may be changed as appropriate.

In the embodiment, only the first field magnetic pole 41 or only the second field magnetic pole 46 may be provided. That is, the field pole may be provided only on one side in the axis L direction.
In the embodiment, the field magnetic path is formed through the shaft 15, but the present invention is not limited thereto, and the field magnetic path may be formed without using the shaft 15. A magnetic material having a smaller magnetic resistance than the shaft 15 may be provided on the shaft 15 to form a field magnetic path. For example, SMC may be used as the magnetic material.

  In the embodiment, the rotor teeth 31a serving as the convex pole portions are convex in shape. However, the present invention is not limited to this configuration, and any magnetically convex polarity may be used. For example, only the tip of the rotor teeth may be connected to the adjacent rotor teeth, or the recess between the rotor teeth may be filled with a nonmagnetic material, so that the rotor may be cylindrical as a whole.

In the embodiment, the core back 12 is formed of SMC. However, the core back 12 is not limited to this and may be a magnetic body such as an iron ingot.
In the embodiment, the motor 10 is embodied as a rotating electrical machine, but the present invention is not limited to this and may be used as a generator.

  DESCRIPTION OF SYMBOLS 10 ... Motor as rotary electric machine, 12 ... Core back which functions as a magnetic path forming member, 15 ... Shaft, 21 ... Stator core, 21a ... Stator teeth, 22 ... Armature coil, 30 ... Rotor, 31a ... As a convex pole part Rotor teeth, 42: a first field core that functions as a magnetic path forming member, 43: a first field coil as a field coil, 47: a second field core that functions as a magnetic path forming member, 48: a field magnet A second field coil as a coil, 51 ... an armature coil bobbin, 52 ... a coil winding part, 53 ... a first flange which is one of a pair of flanges, 54 ... a second flange which is the other of the pair of flanges, 61... First restriction protrusion that is one of the pair of restriction protrusions. 62. Second restriction protrusion that is the other of the pair of restriction protrusions. 66... One of the pair of restriction protrusions. A third restricting protrusion 67, a fourth restricting protrusion that is the other of the pair of restricting protrusions, 71 a first engaging recess as an engaging recess, 72 a second engagement as an engaging recess Concave part, 76 ... 3rd field coil as a field coil, 77 ... 4th field coil as a field coil.

Claims (3)

A rotor rotatably supported on the shaft and having a magnetic convex pole portion;
A stator core having a plurality of stator teeth that are disposed radially outside the convex pole portion of the rotor and project toward the shaft;
An armature coil bobbin into which the stator teeth are inserted;
An armature coil concentratedly wound around the outer periphery of the armature coil bobbin;
A rotary electric machine comprising a magnetic path forming member that forms a field magnetic path together with at least the rotor and the stator core in accordance with energization of a field coil,
The armature coil bobbin is composed of a cylindrical coil winding portion around which the armature coil is wound, and a pair of flanges for restricting movement of the stator core in the radial direction in the armature coil,
A rotating electric machine characterized in that the field coil is wound around a shaft line around a shaft of a flange located on the radially outer side of the armature coil bobbin provided in each stator tooth. .   2. The rotating electrical machine according to claim 1, wherein an engagement recess for engaging the field coil is formed in a flange around which the field coil is wound in the armature coil bobbin.   The flange around which the field coil of the armature coil bobbin is wound is provided with a pair of restricting protrusions protruding outward in the radial direction and spaced apart in the axial direction of the shaft. The rotating electrical machine according to claim 1 or 2.

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