JP2019140789A - Rotary electric machine - Google Patents

Abstract

To efficiently generate a large field magnetic flux in a rotary electric machine having a toroidal-wound coil.SOLUTION: A stator 12 has a toroidal-wound armature coil 26. A rotor 14 has: a rotor radial part 18; and two rotor axial parts 20A, 20B. A field magnetic flux Φsurrounding two field magnetic coils 34A, 34B together is generated when current in the same orientation is applied to the field magnetic coils 34A, 34B. The field magnetic flux Φis not restricted by magnetic saturation at a part of radial teeth 30 since the field magnetic flux Φdoes not pass through the radial teeth 30. In addition, air gaps through which the field magnetic flux Φpasses become two parts, and the field magnetic flux Φcan be efficiently generated.SELECTED DRAWING: Figure 7

Description

  The present invention relates to the formation of field magnetic flux in a rotating electrical machine having a toroidal coil.

  There is known a rotating electrical machine having a coil wound around an annular portion of a core, a so-called toroidal coil.

  Patent Document 1 below discloses a rotating electrical machine (10) having a toroidal coil. The stator (12) includes an annular core portion (26) around which the armature winding (28) is wound, and radial teeth (30) that protrude radially inward from the annular core portion (26) and are arranged in the circumferential direction. And axial teeth (80) protruding from both sides in the axial direction from the annular core portion (28) and arranged in the circumferential direction. Further, the stator (12) is provided with field windings (70, 90) for controlling the field magnetic flux. The rotor has a radial rotor (14) and an axial rotor (84). The radial rotor (14) includes a radial core (16), radial permanent magnets (18) and radial salient poles (19) alternately arranged in the circumferential direction on the surface of the radial core (16) facing the stator (12). ). The axial rotors (64, 84) are axial permanent magnets (68, 88) that are alternately arranged in the circumferential direction on the surface of the axial core (66, 86) facing the stator (12) of the axial core (66, 86). ) And axial salient poles (69, 89).

  The field magnetic flux (72, 92) formed by the field windings (70, 90) is distributed from the radial teeth (30) to the radial salient pole portion (19), the radial core (16), and the axial core (66, 86). ), Return to the radial teeth (30) through the axial salient pole portions (69, 89), the axial teeth (80), and the annular core portion (26) (see FIGS. 8 and 9, etc.).

  Patent Document 2 below shows a DC excited field synchronous motor (100B) having a stator (300B) having a toroidal coil, a rotor (200B), and an exciting coil (430) as a second embodiment. Has been. The magnetic flux formed by the exciting coil (430) is generated between the air gap (two locations) between the flux gate (261) and the exciting iron core (410, 420), and between the field magnetic pole (250) and the annular iron core (330). It passes through a total of four air gaps with two air gaps.

  In addition, said code | symbol in () is the code | symbol respectively used in following patent document 1, 2, and is not related with the code | symbol used by description of embodiment of this application.

JP 2010-226808 A Japanese Patent Laid-Open No. 2015-15874

  In the rotating electrical machine described in Patent Document 1, the field magnetic flux passes through the radial teeth. For this reason, when the radial teeth are magnetically saturated, the field magnetic flux cannot be increased any more, and the field magnetic flux is limited. Further, in the electric motor described in Patent Document 2, the magnetic flux formed by the exciting coil passes through the four air gaps, so the efficiency of forming the magnetic flux is poor.

  An object of the present invention is to efficiently form a large field magnetic flux in a toroidal coil type rotating electrical machine.

  In the rotating electrical machine according to the present invention, the first element and the second element that are coaxially arranged with respect to the rotation axis rotate relatively around the rotation axis. For example, the first element can be a stator and the second element can be a rotor. The first element includes an annular first element yoke portion, radial teeth protruding from the first element yoke portion in a direction (radial direction) perpendicular to the rotation axis, and arranged in a direction around the rotation axis (circumferential direction), A first element core having axial teeth that protrude from the first element yoke part along both sides in the direction of the rotation axis (axial direction) and are arranged in the circumferential direction, and is toroidally wound around the first element yoke part. And an armature coil that excites the radial teeth and the axial teeth to generate a rotating magnetic field in the first element. The second element (rotor) is opposed to the radial teeth of the first element in the radial direction, and is integrated with the second element radial part that interacts with the rotating magnetic field generated in the first element, and the second element radial part. There are two second element axial portions facing the axial teeth of the first element on both sides in the axial direction, respectively, an annular second element axial core portion, and from the second element axial core portion toward the first element And a second element axial portion that interacts with the rotating magnetic field generated in the first element. The axial salient pole of one second element axial portion and the axial salient pole of the other second element axial portion are arranged so as to be shifted in the circumferential direction. Further, the rotating electric machine has a second element radial part, a second element axial core part and an axial salient pole of one second element axial part, a first element core, and a second element axial part by direct current flowing. A field coil for generating a field magnetic flux that passes through the axial salient pole of the part, the second element axial core part, and the second element radial part in this order.

  Since the field magnetic flux formed by the field coil does not pass through the radial teeth of the first element, the amount of the field magnetic flux is not limited by the cross-sectional area of the radial teeth. The air gap through which the field magnetic flux passes is two places between one second element axial portion and the first element, and between the other second element axial portion and the first element. Reduction of magnetic flux is suppressed.

  The field coil can be wound in an annular shape along the circumferential direction.

  Two field coils can be provided. One of the two field coils can be disposed near one of the second element axial portions and the other can be disposed close to the other of the second element axial portions. Further, it can be positioned closer to the second element radial portion than the first element yoke portion in the radial direction, and closer to the corresponding second element axial portion than the first yoke portion in the axial direction. Furthermore, the current can be made to flow in the same direction through the two field coils.

  The field coil can be provided integrally with either the first element or the second element. For example, it can be provided integrally with the fixed side.

  The second element axial portion may have permanent magnets alternately arranged with axial salient poles in the circumferential direction.

  The second element radial portion may be configured such that portions having a large magnetic resistance and portions having a small magnetic resistance are alternately arranged in the circumferential direction.

  The second element radial portion may include permanent magnets arranged in the circumferential direction so that the polarities of the surfaces facing the first element are alternated.

  The circumferential position of the axial salient pole is determined so that the torque generated by the interaction between the rotating magnetic field generated in the first element and the second element axial portion is maximized with respect to the phase of the alternating current flowing in the armature coil. In addition, the positions in the circumferential direction of the large and small portions of the magnetic resistance can be determined so that the torque generated by the interaction between the rotating magnetic field generated in the first element and the second element radial portion is maximized.

  The circumferential position of the axial salient pole is determined so that the torque generated by the interaction between the rotating magnetic field generated in the first element and the second element axial portion is maximized with respect to the phase of the AC power flowing in the armature coil. In addition, the circumferential position of the permanent magnet can be determined so that the torque generated by the interaction between the rotating magnetic field generated in the first element and the second element radial portion is maximized.

  The second element radial portion has a pair of short-circuited rings centered on the rotation axis and spaced apart in the axial direction, and a pair of short-circuited rings that are paired and arranged in the circumferential direction. Can be.

  According to the present invention, a large field magnetic flux can be efficiently formed.

It is a perspective view which shows roughly the external appearance of the rotary electric machine of this embodiment. It is a perspective view which shows roughly the external appearance of the stator of the rotary electric machine shown in FIG. It is a perspective view which shows roughly the external appearance of the rotor of the rotary electric machine shown in FIG. It is a perspective view which decomposes | disassembles and shows the structure of a part of stator. It is an expansion perspective view which shows a part of rotor. It is an expansion perspective view which shows a part of rotor. It is sectional drawing orthogonal to the circumferential direction of the rotary electric machine shown in FIG. 1, and is a figure which shows a field magnetic flux. It is a figure which shows the torque characteristic of the rotary electric machine shown in FIG. It is sectional drawing orthogonal to the circumferential direction of the rotary electric machine of other embodiment.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. 1 to 3 are perspective views schematically showing the appearance of the toroidal coil type rotating electrical machine 10 and the first element 12 and the second element 14 that rotate relative to each other. The “rotary electric machine” is used as a general term for an electric motor, a generator, and electric devices that can operate with both the electric motor and the generator. The first element 12 and the second element 14 are coaxially arranged with respect to the rotation axis 16 of the rotating electrical machine 10, and are relatively rotatable around the rotation axis 16. In the rotating electrical machine 10, the first element 12 is fixed and the second element 14 rotates. Hereinafter, the first element 12 is referred to as a stator 12, and the second element 14 is referred to as a rotor 14. In the following description, a direction along the rotation axis 16 is referred to as an axial direction, a direction orthogonal to the rotation axis 16 is referred to as a radial direction, and a direction around the rotation axis 16 is referred to as a circumferential direction.

  The stator 12 has an annular shape with the rotation axis 16 as a central axis, and the cross-sectional shape orthogonal to the circumferential direction is a substantially quadrangle. The rotor 14 has a substantially cylindrical rotor radial portion 18 positioned on the inner side in the radial direction of the stator 12 and two rotor axial portions 20 positioned on both sides of the stator 12 in the axial direction. When it is necessary to distinguish between the two rotor axial portions 20, they are distinguished by adding A and B to the reference numeral 20. In FIGS. 1 and 3, reference numeral 20 </ b> A is attached to the rotor axial part on the back side, and reference numeral 20 </ b> B is attached to the rotor axial part on the front side. Constituent elements belonging to the rotor axial section 20 are also distinguished from each other by adding numerals A and B to the reference numerals, and A and B are omitted if no distinction is necessary. The two rotor axial portions 20 are respectively disposed at both ends of the rotary radial portion 18 and are integrated with the rotary radial portion 18. In the rotor 14, a rotor shaft 22 that is an output shaft of the rotating electrical machine 10 is disposed concentrically with the rotation axis 16, and is integrated with the rotor radial portion 18 and the rotor axial portion 20.

  The stator 12 includes a substantially ring-shaped stator core 24 formed of a soft magnetic material, and an armature coil 26 wound around the stator core 24. The stator core 24 includes an annular stator yoke portion 28, radial teeth 30 protruding radially inward from the stator yoke portion 28, and axial teeth 32 protruding on both sides in the axial direction. The radial teeth 30 protrude toward the rotary radial portion 18 and are arranged at intervals in the circumferential direction. The axial teeth 32 include an axial tooth 32A that protrudes toward the rotor axial portion 20A and an axial tooth 32B that protrudes toward the rotor axial portion 20B, and are arranged at intervals in the circumferential direction. The radial teeth 30 and the axial teeth 32 are arranged at the same position in the circumferential direction, that is, aligned in phase. The armature coil 26 is wound around the stator yoke portion 28 between the teeth 30 and 32 arranged in the circumferential direction. When a current is passed through the armature coil 26, the radial teeth 30 and the axial teeth 32 are excited, and the magnetic flux is directed to both sides in the radial direction and in the axial direction. A rotating magnetic field can be formed by supplying AC power to each armature coil 26 at a predetermined phase.

  The stator 12 has a field coil 34 that is wound around the rotation axis 16. In the rotating electrical machine 10, one field coil 34 is disposed on each side end in the axial direction of the inner periphery of the stator 12, for a total of two. When it is necessary to distinguish between the two field coils 34, reference numeral 34A is assigned to the field coil 34 disposed on the rotor axial portion 20A side, and the field coil 34 disposed on the rotor axial portion 20B side. Reference numeral 34B is used. The action of the magnetic flux generated by the field coil 34 will be described later.

  FIG. 4 is an exploded view of the stator core 24 and the field coil 34 around which the armature coil 26 is wound. The field coil 34 is accommodated in a shoulder 36 formed by a side surface in the axial direction of the radial teeth 30 and a side surface on the radially inner side of the axial teeth 32, and the cross section perpendicular to the circumferential direction of the stator 12 is as described above. It is almost square. Further, a tapered surface 38 whose outer diameter decreases toward the stator core 24 is provided on the outer peripheral surface of the field coil 34. By providing the tapered surface 38, interference with the inner corner portion 40 of the armature coil 26 is suppressed.

  5 and 6 are diagrams showing a more detailed shape of the rotor 14. FIG. 6 is a view showing a state in which the front rotor axial portion 20 </ b> B is removed in order to show the internal structure of the rotary radial portion 18. The rotor radial portion 18 includes a substantially cylindrical or cylindrical rotor radial core 42 and a permanent magnet 44 embedded near the outer peripheral surface of the rotor radial core 42. This permanent magnet 44 is referred to as a radial permanent magnet 44. The rotor radial core 42 is made of a soft magnetic material, and a magnet hole for accommodating the radial permanent magnet 44 extends in the axial direction near the outer peripheral surface. The radial permanent magnets 44 are arranged in the circumferential direction, and each forms a magnetic pole. The radial permanent magnets 44 are arranged so that the polarities on the outer peripheral surface side of the rotor radial portion 18 are alternated. In FIGS. 5 and 6, the poles facing outward are adjacent to the N poles in the radial permanent magnet 44-1. The radial permanent magnet 44-2 is arranged so as to be the south pole. Since the magnetic permeability of the permanent magnet is substantially equal to the magnetic permeability of air, the magnetic resistance at the position where the permanent magnet 44 is arranged is large, while at the position between the permanent magnets 44 adjacent in the circumferential direction, the rotor radial core 42 Since a soft magnetic material is present, the magnetic resistance is reduced. Accordingly, the rotary radial portion 18 has alternating portions with large and small magnetic resistance in the circumferential direction. The outer peripheral surface of the rotor radial portion 18 faces the radial teeth 30 of the stator 12, and the rotor 14 rotates due to the interaction with the rotating magnetic field formed by the stator 12, particularly the radial teeth 30.

  The rotor axial portion 20 is provided on the surface of the rotor axial core 46 (46A, 46B) having a substantially disc shape or an annular plate shape and the stator 12 of the rotor axial core 46 facing the stator 12, and is arranged in the circumferential direction. It includes poles 48 (48A, 48B) and permanent magnets 50 (50A, 50B). This permanent magnet 50 is referred to as an axial permanent magnet 50. The axial salient pole 48 may be formed separately from the rotor axial core 46 and then attached to the rotor axial core 46 by a technique such as adhesion, or may be formed integrally with the rotor axial core 46. The axial permanent magnets 50 are arranged so as to be alternately arranged with the axial salient poles 48 in the circumferential direction. 5 and 6, the axial permanent magnet 50A belonging to the rotor axial portion 20A on the back side is disposed so that the side facing the axial teeth 32A of the stator 12 is the S pole, and the axial permanent magnet belonging to the rotor axial portion 20B on the near side is disposed. The magnet 50B is arranged so that the side of the stator 12 facing the axial teeth 32B is an N pole.

  In the rotor 14, the positions (phases) in the circumferential direction of the poles of the rotor radial portion 18 and the rotor axial portion are aligned. That is, as shown in FIGS. 5 and 6, the axial salient pole 48A and the axial permanent magnet 50B are arranged in alignment with the radial permanent magnet 44-1, and the axial permanent magnet 50A is aligned with the position of the permanent magnet 44-2. And the axial salient pole 48B is arrange | positioned. The polarities of the surfaces of the radial permanent magnet 44 and the axial permanent magnet 50, which are aligned, facing the stator are the same.

FIG. 7 is a view of a cross section orthogonal to the circumferential direction of the rotating electrical machine 10 as viewed in the direction of arrow Y in FIG. The cross section of the rotor 14 shown in FIG. 7 shows cross sections at different positions in the right half and the left half, the right half shows a cross section passing through the axial salient pole 48B, and the left half shows a cross section passing through the axial salient pole 48A. When the currents I _A and I _B are passed through the field coils 34A and 34B, a field magnetic flux Φ _F is generated. Current I _A, I _B, in both FIG. 7, the paper flow in a direction passing through the back from the table, the current I _A, flux [Phi _F field formed by I _B are two field coils 34A , 34B are formed around each other. The field magnetic flux Φ _F travels from the rotor radial portion 18 to the stator core 24 through the rotor axial core 46A and the axial salient pole 48A of one rotor axial portion 20A. In the stator core 24, it flows in the circumferential direction and heads for the other rotor axial portion 20B at a position different from the axial salient pole 48A. In the other rotor axial part 20B, it returns to the rotary radial part 18 through the axial salient pole 48B and the rotor axial core 46B. Since the field magnetic flux Φ _F does not pass through the radial teeth 30, even if the radial teeth 30 have a small cross section, such as when the axial dimension of the rotating electrical machine is small, the magnetic field is not affected by magnetic saturation at this portion. The magnetic flux Φ _F can be increased. The air gap through which the field magnetic flux Φ _F passes is two places between the axial salient pole 48A and the stator core 24 and between the stator core 24 and the axial salient pole 48B, and the number of air gaps is small, and the field magnetic flux Φ _F can be formed efficiently.

The field magnetic flux Φ _F and the magnetic magnetic flux Φ _M passing through the stator 12 are shown in FIG. The magnet magnetic flux Φ _M is a magnetic flux formed by the axial permanent magnet 50. When the currents I _A and I _B in the directions shown in FIGS. 5 and 7 are passed through the field coil 34, the field magnetic flux Φ _F flows in the same direction as the magnetic magnetic flux Φ _M in the stator yoke portion 28, and the total magnetic flux is growing. Therefore, the torque generated by the interaction between the rotor axial portion 20 and the stator 12 can be increased, and the maximum torque of the rotating electrical machine 10 can be increased. When the currents I _A and I _B are flowed in the opposite directions, the field magnetic flux Φ _F flows in the opposite direction to the magnet magnetic flux Φ _M, and the total magnetic flux becomes small, so that field weakening control can be performed.

  FIG. 8 is a diagram showing the relationship between the phase θ of the current flowing through the armature coil 26 of the rotating electrical machine 10 and the output torque T. A radial portion torque that is a torque generated by the mutual relationship between the stator 12 and the rotor radial portion 18 is indicated by Tr, and an axial portion torque that is a torque generated by the mutual relationship between the stator 12 and the rotor axial portion 20 is indicated by Ta. The axial torque Ta when the current phase θ is 0 ° is normalized as 1. The axial portion torque Ta becomes maximum when the current phase θ is 0 °, and decreases as the current phase θ increases. On the other hand, the radial portion torque Tr becomes maximum at a position where the current phase θ is deviated from 0 °. The amount of phase shift is indicated by Δθ in the figure.

  The rotor radial portion 18 of the rotating electrical machine 10 is an embedded magnet type rotor, and in the case of such a rotor structure using reluctance torque, the current phase θ at which the torque is maximum is shifted from 0 °. If the positions of the poles of the rotor radial portion 18 are shifted by the amount of the phase shift Δθ, the current phase θ at which the radial portion torque Tr is maximized matches the current phase θ at which the axial portion torque Ta is maximized, The total torque that is the sum of the radial part torque Tr and the axial part torque Ta can be increased.

  In the rotating electrical machine 10, as shown in FIG. 8, when the current phase θ is about 30 °, the radial portion torque Tr becomes maximum. When the rotation direction of the rotor is the direction of the arrow R shown in FIG. 6, the rotor radial portion 18 is disposed 30 ° away from the rotor axial portion 20 in the direction opposite to the rotation direction R (the direction of the arrow Z shown in the drawing). And That is, each component of the rotary radial portion 18 such as the radial permanent magnet 44 is shifted in the direction of the arrow Z. Specifically, the radial permanent magnet 44-1 is arranged by being shifted by 30 ° in the direction opposite to the rotation direction R from the position aligned with the axial salient pole 48 A and the axial permanent magnet 50 B in the circumferential direction. -2 is arranged by being shifted by 30 ° in the direction opposite to the rotational direction R from the position of the axial permanent magnet 50A and the axial salient pole 48B. Thus, the phase of the magnetic pole array formed by the radial permanent magnet and the phase of the magnetic resistance (reluctance) array formed by the shape of the core of the rotor radial part are the axial salient poles 48 of the rotor radial part. The phase of the pole array formed by the axial permanent magnet 50 is shifted.

  Further, even when the rotor axial portion employs a rotor structure that uses reluctance torque, the current phase θ that maximizes the radial portion torque Tr and the current phase θ that maximizes the axial portion torque Ta coincide with each other. The poles of the radial part and the rotor axial part can be arranged.

  In the rotating electrical machine 10, both the rotor radial portion 18 and the rotor axial portion 20 are rotors including permanent magnets, but either one or both can be rotors not including permanent magnets. The structure of the rotary radial part that does not include the permanent magnet may be a structure in which the radial permanent magnet 44 is removed from the above-described rotary radial part 18. Moreover, the structure of the rotor axial part which is not provided with a permanent magnet can be made into the structure which removed the axial permanent magnet 50 from the above-mentioned rotor axial part 20. FIG.

  In the rotating electrical machine 10, the stator 12 is fixed and the rotor 14 rotates. However, the configuration is not limited to this, and the rotor 14 may be fixed and the stator 12 may rotate, or both may rotate. .

  FIG. 9 is a schematic diagram showing a cross section perpendicular to the circumferential direction showing the configuration of a rotating electrical machine 60 according to another embodiment. The stator of the rotating electrical machine 60 has the same configuration as the stator 12 of the rotating electrical machine 10 described above, and a description thereof is omitted. The rotor axial portion of the rotor 62 of the rotating electrical machine 60 has the same configuration as the rotor axial portion 20 (20A, 20B) of the rotating electrical machine 10 described above, and a description thereof is omitted.

The rotating electric machine 60 is different from the rotating electric machine 10 in the configuration of the rotary radial portion 64. The rotor radial portion 64 has a squirrel-cage rotor configuration of a squirrel-cage induction machine. In other words, the rotary radial portion 64 includes two annular short-circuit rings 66 arranged with the rotation axis 16 as the central axis, and each extending in the axial direction to connect the two short-circuit rings 66 to each other in the circumferential direction. It includes a conductor bar 68 disposed. The rotating electrical machine 60 can be started using the rotor radial portion 64, and can be operated with torque from the rotor axial portion 20 after reaching the synchronous speed. When a rotating magnetic field is generated in the stator while the rotor 14 is not rotating, an induced current flows through the conductor rod 68, and the rotor 14 starts to rotate due to the interaction between the induced current and the rotating magnetic field. When the rotational speed increases to near the synchronous speed, the rotor 14 rotates due to the interaction between the rotating magnetic field and the rotor axial portion 20, and torque is generated. As in the case of the rotating electrical machine 10, by passing a current through the field coils 34, (34 </ b> A, 34 </ b> B), the field magnetic flux Φ _F is generated, and the torque can be increased.

DESCRIPTION OF SYMBOLS 10 Rotating electrical machine, 12 Stator (1st element), 14 Rotor (2nd element), 16 Rotating axis, 18 Rotor radial part (2nd element radial part), 20 Rotor axial part (2nd element axial part), 22 Rotor Shaft, 24 Stator core (first element core), 26 Armature coil, 28 Stator yoke portion (first element yoke portion), 30 Radial teeth, 32 Axial teeth, 34 Field coil, 36 Shoulder portion, 38 Tapered surface, 40 Inner corner, 42 rotor radial core, 44 radial permanent magnet, 46 rotor axial core, 48 axial salient pole, 50 axial permanent magnet, 60 rotating electrical machine, 62 rotor (second element), 64 rotor radial section, 66 short circuit ring, 68 Conductor bar.

Claims (10)

A rotating electrical machine in which a first element and a second element arranged coaxially with respect to a rotation axis rotate relative to each other around a rotation axis,
The first element is
An annular first element yoke portion, radial teeth projecting in a radial direction perpendicular to the rotation axis from the first element yoke portion, and arranged in a circumferential direction around the rotation axis, and an axis along the rotation axis from the first element yoke portion A first element core having axial teeth projecting on both sides in the direction and arranged in the circumferential direction;
An armature coil that is toroidally wound around the first element yoke portion, excites radial teeth and axial teeth by flowing alternating current, and generates a rotating magnetic field in the first element;
Have
The second element is
A second element radial portion facing the radial teeth of the first element in the radial direction and interacting with the rotating magnetic field generated in the first element;
Two second element axial portions that are integral with the second element radial portion and are opposed to the axial teeth of the first element on both sides in the axial direction, respectively, an annular second element axial core portion, and a second element axial portion An axial salient pole projecting from the core part toward the first element, and a second element axial part interacting with the rotating magnetic field generated in the first element;
Have
The axial salient pole of one second element axial part and the axial salient pole of the other second element axial part are arranged shifted in the circumferential direction,
Further, when a direct current flows, the second element radial part, the second element axial core part and axial salient pole of one second element axial part, the first element core, and the axial salient pole of the other second element axial part And a field coil for generating a field magnetic flux passing through the second element axial core part and the second element radial part in this order,
Rotating electric machine having   The rotating electrical machine according to claim 1, wherein the field coil is wound in an annular shape along a circumferential direction.   3. The rotating electrical machine according to claim 2, wherein two field coils are provided, one is arranged on one side of the second element axial part and the other is arranged close to the other side of the second element axial part, and is arranged in the radial direction. Is located closer to the second element radial part than the first element yoke part, and is located closer to the corresponding second element axial part than the first yoke part with respect to the axial direction. A rotating electrical machine that carries current.   The rotating electrical machine according to any one of claims 1 to 3, wherein the field coil is provided integrally with one of the first element and the second element.   5. The rotating electrical machine according to claim 1, wherein the second element axial portion includes permanent magnets alternately arranged with axial salient poles in a circumferential direction. 6.   6. The rotating electrical machine according to claim 1, wherein the second element radial portion has a portion having a large magnetic resistance and a portion having a small magnetic resistance alternately arranged in the circumferential direction.   The rotary electric machine according to any one of claims 1 to 6, wherein the second element radial portion includes permanent magnets arranged in a circumferential direction so that polarities of surfaces facing the first element are alternately arranged. , Rotating electrical machinery.   7. The rotating electrical machine according to claim 6, wherein the torque generated by the interaction between the rotating magnetic field generated in the first element and the second element axial portion is maximized with respect to the phase of the alternating current flowing in the armature coil. The circumferential direction of the axial salient pole is determined, and the circumferential direction of the large and small portions of the magnetic resistance is such that the torque generated by the interaction between the rotating magnetic field generated in the first element and the second element radial portion is maximized. The position of the rotating electrical machine.   7. The rotating electrical machine according to claim 6, wherein the torque generated by the interaction between the rotating magnetic field generated in the first element and the second element axial portion is maximized with respect to the phase of the AC power flowing through the armature coil. The circumferential position of the axial salient pole is determined, and the circumferential position of the permanent magnet is determined so that the torque generated by the interaction between the rotating magnetic field generated in the first element and the second element radial portion is maximized. The rotating electric machine. 6. The rotating electrical machine according to claim 1, wherein the second element radial portion is a pair of short-circuited rings that are arranged in pairs separated from each other in the axial direction with the rotation axis as the center. A rotating electrical machine having a connecting rod connected in a circumferential direction.

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