JP6830073B2 - Rotating machine - Google Patents

Description

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

A rotary electric machine having a coil wound around an annular portion of a core, a so-called toroidal coil, is known.

The following Patent Document 1 discloses a rotary electric machine (10) having a toroidal coil. The stator (12) has an annular core portion (26) around which the armature winding (28) is wound, and a radial teeth (30) that protrudes inward in the radial direction from the annular core portion (26) and is arranged in the circumferential direction. And has axial teeth (80) protruding from the annular core portion (28) on both sides in the axial direction 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 includes 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 a surface of the radial core (16) facing the stator (12). ). The axial rotor (64,84) is an axial permanent magnet (68,88) arranged alternately 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 from the radial tire (30) to the radial salient pole (19), the radial core (16), and the axial core (66,86). ), Axial salient poles (69, 89), axial teeth (80), and annular core (26) to return to radial tires (30) (see FIGS. 8 and 9).

Further, Patent Document 2 below shows, as a second embodiment, a DC exciting magnetic field type synchronous motor (100B) having a stator (300B) having a toroidal coil, a rotor (200B), and an exciting coil (430). Has been done. The magnetic flux formed by the exciting coil (430) is between the air gaps (2 locations) between the flux gate (261) and the exciting iron cores (410, 420) and between the field magnetic poles (250) and the annular core (330). It passes through a total of 4 air gaps with the air gaps (2 places).

The reference numerals in parentheses above are the reference numerals used in Patent Documents 1 and 2 below, and are not related to the reference numerals used in the description of the embodiments of the present application.

JP-A-2010-226808 JP-A-2015-15874

In the rotary electric machine described in Patent Document 1, the field magnetic flux passes through the radial tire. Therefore, when the radial tires 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 four air gaps, so that 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 rotary electric machine.

In the rotary electric machine according to the present invention, the first element and the second element coaxially arranged with respect to the rotation axis rotate relative to each other around the rotation axis, and 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 orthogonal to the rotation axis (radial direction), and arranged in a direction around the rotation axis (circumferential direction). The AC current is toroidally wound around the first element core and the first element yoke, which have axial teeth that protrude from the first element yoke on both sides in the direction along the rotation axis (axis direction) and are arranged in the circumferential direction. It has an armature coil that excites the radial teeth and the axial teeth by flowing the current and generates a rotating magnetic field in the first element. Further, the second element (rotor) is integrally with the second element radial portion and the second element radial portion, which face the radial teeth of the first element in the radial direction and interact with the rotating magnetic field generated in the first element. There are two second element axial portions facing the first element axial teeth on both sides in the axial direction, respectively, from the annular second element axial core portion and the second element axial core portion to the first element. It has an axial salient pole that protrudes from the ground, and has a second element axial portion that interacts with a 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 offset in the circumferential direction. Further, in this rotary electric machine, a direct current flows through the second element radial portion, the second element axial core portion of one second element axial portion, and the axial salient pole, the first element core, and the other second element axial portion. It has a field coil that generates 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 tire of the first element, the amount of the field magnetic flux is not limited by the cross-sectional area of the radial tire. Further, there are two air gaps through which the field magnetic flux passes, one between the second element axial portion and the first element, and the other between the second element axial portion and the first element, and the field due to the air gap. The decrease in magnetic flux is suppressed.

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

Two field coils can be provided. The two field coils can be arranged so that one is close to one of the second element axial portions and the other is close to the other of the second element axial portions. Further, it can be located 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. Further, the two field coils can be made to flow current in the same direction.

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 that are alternately arranged with the axial salient poles in the circumferential direction.

In the radial portion of the second element, a portion having a large magnetic resistance and a portion having a small magnetic resistance can be arranged alternately in the circumferential direction.

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

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

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

The second element radial portion has a pair of short-circuit rings arranged around the rotation axis and separated from each other in the axial direction, and a conductor rod arranged in the circumferential direction by connecting the pair of short-circuit rings. Can be.

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

It is a perspective view which shows schematic appearance of the rotary electric machine of this embodiment. It is a perspective view which shows schematic appearance of the stator of the rotary electric machine shown in FIG. It is a perspective view which shows schematic appearance of the rotor of the rotary electric machine shown in FIG. It is a perspective view which shows the structure of a part of a stator by disassembly. It is an enlarged perspective view which shows a part of a rotor. It is an enlarged perspective view which shows a part of a rotor. It is sectional drawing which is orthogonal to the circumferential direction of the rotary electric machine shown in FIG. 1, and is the figure which shows the field magnetic flux. It is a figure which shows the torque characteristic of the rotary electric machine shown in FIG. It is sectional drawing which is orthogonal to the circumferential direction of the rotary electric machine of another 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 rotary electric machine 10 and the relative rotating first element 12 and second element 14. The term "rotary electric machine" is used as a general term for electric motors, generators, and electric devices that can operate with both electric motors and generators. The first element 12 and the second element 14 are coaxially arranged with respect to the rotation axis 16 of the rotary electric machine 10, and are relatively rotatable around the rotation axis 16. In the rotary electric machine 10, the first element 12 is fixed and the second element 14 rotates. Hereinafter, the first element 12 will be referred to as a stator 12, and the second element 14 will be referred to as a rotor 14. Further, in the following, the direction along the rotation axis 16 will be referred to as an axial direction, the direction orthogonal to the rotation axis 16 will be referred to as a radial direction, and the direction around the rotation axis 16 will be referred to as a circumferential direction.

The stator 12 has a ring shape with the rotation axis 16 as the central axis, and the shape of the cross section orthogonal to the circumferential direction is approximately a quadrangle. The rotor 14 has a substantially cylindrical rotor radial portion 18 located inside the stator 12 in the radial direction, and two rotor axial portions 20 located on both sides of the stator 12 in the axial direction. When it is necessary to distinguish between the two rotor axial portions 20, reference numerals 20 are added with A and B to distinguish them. In FIGS. 1 and 3, reference numeral 20A is attached to the rotor axial portion on the back side, and reference numeral 20B is attached to the rotor axial portion on the front side. The components belonging to the rotor axial section 20 are also distinguished by adding A and B to the numerical symbols according to this, and A and B are omitted if the distinction is unnecessary. The two rotor axial portions 20 are arranged at both ends of the rotary portion 18 and are integrated with the rotary portion 18. In the rotor 14, the rotor shaft 22 which is the output shaft of the rotary electric machine 10 is arranged concentrically with the rotary 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 made of a soft magnetic material and an armature coil 26 wound around the stator core 24. The stator core 24 has an annular stator yoke portion 28, a radial tooth 30 projecting inward in the radial direction from the stator yoke portion 28, and an axial tooth 32 projecting on both sides in the axial direction. The radial tires 30 project toward the rotary portion 18 and are arranged at intervals in the circumferential direction. The axial teeth 32 include an axial teeth 32A projecting toward the rotor axial portion 20A and an axial teeth 32B projecting 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, in phase. The armature coil 26 is wound around a stator yoke portion 28 between the teeth 30 and 32 arranged in the circumferential direction. When an electric 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 inward in the radial direction and on both sides in the axial direction. A rotating magnetic field can be formed by passing AC power through each armature coil 26 in a predetermined phase.

The stator 12 has a field coil 34 wound so as to orbit around the rotation axis 16. In the rotary electric machine 10, one field coil 34 is arranged at each end of the inner circumference of the stator 12 in the axial direction, for a total of two. When it is necessary to distinguish between the two field coils 34, the reference numeral 34A is attached to the field coil 34 arranged on the rotor axial portion 20A side, and the field coil 34 arranged on the rotor axial portion 20B side is assigned a reference numeral 34A. 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 around which the armature coil 26 is wound and the field coil 34. The field coil 34 fits in the shoulder portion 36 formed by the side surface of the radial tooth 30 in the axial direction and the inner side surface of the axial tooth 32 in the radial direction, and the cross section orthogonal to the circumferential direction of the stator 12 is as described above. It is almost a quadrangle. Further, on the outer peripheral surface of the field coil 34, a tapered surface 38 whose outer diameter becomes smaller toward the stator core 24 is provided. By providing the tapered surface 38, interference with the inner corner portion 40 of the armature coil 26 is suppressed.

5 and 6 are views showing a more detailed shape of the rotor 14. FIG. 6 is a diagram showing a state in which the rotor axial portion 20B on the front side is removed in order to show the internal structure of the rotary portion 18. The rotary portion 18 includes a substantially cylindrical or cylindrical rotary core 42 and a permanent magnet 44 embedded near the outer peripheral surface of the rotary core 42. This permanent magnet 44 is referred to as a radial permanent magnet 44. The rotary 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 of them forms a magnetic pole. The radial permanent magnets 44 are arranged so that the polarities on the outer peripheral surface side of the rotary permanent magnet 18 are alternated. In FIGS. 5 and 6, the outward facing poles are adjacent to each other, and the radial permanent magnets 44-1 have N poles adjacent to each other. The radial permanent magnets 44-2 are arranged so as to have an S pole. Since the magnetic permeability of the permanent magnet is almost 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 rotary core 42 Since the soft magnetic material is present, the magnetic resistance becomes small. Therefore, in the rotary portion 18, portions having a large magnetic resistance and portions having a small magnetic resistance are alternately arranged in the circumferential direction. The outer peripheral surface of the rotary portion 18 faces the radial teeth 30 of the stator 12, and the rotor 14 rotates due to the interaction with the stator 12, particularly the rotating magnetic field formed by the radial teeth 30.

The rotor axial portion 20 is provided on a surface facing the rotor axial cores 46 (46A, 46B) having a substantially disk shape or an annular plate shape and the stator 12 of the rotor axial core 46, and the axial protrusions arranged in the circumferential direction. Includes pole 48 (48A, 48B) and permanent magnet 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 method 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 arranged alternately with the axial salient poles 48 in the circumferential direction. In FIGS. 5 and 6, the axial permanent magnets 50A belonging to the rotor axial portion 20A on the back side are arranged so that the side of the stator 12 facing the axial teeth 32A is the S pole, and the axial permanent magnets belonging to the rotor axial portion 20B on the front side are arranged. The magnet 50B is arranged so that the side of the stator 12 facing the axial teeth 32B has an north pole.

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

FIG. 7 is a view of a cross section orthogonal to the circumferential direction of the rotary electric machine 10 as viewed in the direction of arrow Y in FIG. The cross section of the rotor 14 shown in FIG. 7 shows a cross section at different positions on 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 currents I _A and I _B are passed through the field coils 34 A and 34 _B , a field magnetic flux Φ _F is generated. In FIG. 7, the currents I _A and I _B both flow in the direction of penetrating the paper surface from the front to the back, and the field magnetic flux Φ _F formed by the currents I _A and I _B is the two field coils 34A. , 34B are formed so as to surround them together. 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 faces the other rotor axial portion 20B at a position different from the axial salient pole 48A. The other rotor axial portion 20B returns to the rotary portion 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 cross section of the radial teeth 30 is small, such as when the axial dimension of the rotating electric machine is small, it is not affected by magnetic saturation in this part and the field is magnetic. The magnetic flux Φ _F can be increased. Further, there are two air gaps through which the field magnetic flux Φ _F passes, between the axial salient pole 48A and the stator core 24, and between the stator core 24 and the axial salient pole 48B. 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 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 stator yoke portion 28 in the same direction as the magnet magnetic flux Φ _M, and the total magnetic flux is generated. 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 rotary electric machine 10 can be increased. When the currents I _A and I _B flow in the opposite directions, the field magnetic flux Φ _F flows in the opposite direction to the magnet magnetic flux Φ _M , the total magnetic flux becomes smaller, and the field weakening control can be performed.

FIG. 8 is a diagram showing the relationship between the phase θ of the current energizing the armature coil 26 of the rotary electric machine 10 and the output torque T. The radial portion torque, which is the torque generated by the interrelationship between the stator 12 and the rotor radial portion 18, is indicated by Tr, and the axial portion torque, which is the torque generated by the interrelationship 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 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 torque Tr becomes maximum at a position where the current phase θ deviates from 0 °. The amount of phase shift is indicated by Δθ in the figure.

The rotor radial portion 18 of the rotary electric machine 10 is an embedded magnet type rotor, and in the case of a rotor structure utilizing such reluctance torque, the current phase θ at which the torque is maximized deviates from 0 °. If the positions of the poles of the rotary portion 18 are shifted by the phase shift Δθ, the current phase θ that maximizes the radial portion torque Tr and the current phase θ that maximizes the axial portion torque Ta match. The total torque, which is the sum of the radial torque Tr and the axial torque Ta, can be increased.

In the rotary electric 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 displaced by 30 ° in the direction opposite to the rotation direction R (the direction of the arrow Z shown in the figure) with respect to the rotor axial portion 20. And. That is, each component of the rotary portion 18, such as the radial permanent magnet 44 and the like, is displaced in the direction of the arrow Z. Specifically, the radial permanent magnet 44-1 is arranged so as to be offset by 30 ° in the direction opposite to the rotation direction R from the position aligned with the axial salient pole 48A and the axial permanent magnet 50B in the circumferential direction. Similarly, the radial permanent magnet 44 -2 is arranged so as to be offset by 30 ° in the direction opposite to the rotation direction R from the positions of the axial permanent magnet 50A and the axial salient pole 48B. As a result, the phase of the arrangement of the magnetic poles formed by the radial permanent magnet and the phase of the arrangement of the arrangement of the large and small positions of the magnetoresistance (relactance) formed by the shape of the core of the rotary part become the axial salient pole 48 of the rotary part. The arrangement of the poles formed by the axial permanent magnet 50 is out of phase.

Further, even when the rotor axial portion adopts a rotor structure utilizing the reluctance torque, the rotor so that the current phase θ that maximizes the radial portion torque Tr and the current phase θ that maximizes the axial portion torque Ta match. Each pole of the radial part and the rotor axial part can be arranged.

In the rotary electric machine 10, both the rotary portion 18 and the rotor axial portion 20 are rotors provided with permanent magnets, but one or both of them may be rotors not provided with permanent magnets. The structure of the rotary portion without the permanent magnet can be a structure in which the radial permanent magnet 44 is removed from the above-mentioned rotary portion 18. Further, the structure of the rotor axial portion not provided with the permanent magnet can be a structure in which the axial permanent magnet 50 is removed from the rotor axial portion 20 described above.

In the rotary electric machine 10, the stator 12 is fixed and the rotor 14 is rotated. However, the present invention is not limited to this, and the rotor 14 can be fixed and the stator 12 can be rotated, or both can be rotated. ..

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

The rotary electric machine 60 differs from the rotary electric machine 10 in the configuration of the rotary portion 64. The rotor radial portion 64 has a squirrel-cage rotor configuration of a squirrel-cage induction machine. That is, the rotary portion 64 connects two annular short-circuit rings 66 arranged with the rotation axis 16 as the central axis and two short-circuit rings 66 each extending in the axial direction, and a plurality of the rotary portions 64 are connected in the circumferential direction. Includes the arranged conductor rod 68. The rotary electric machine 60 can be started by using the rotary unit 64, and after reaching the synchronous speed, can be operated by the torque of the rotor axial unit 20. 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 rotating 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 rotary electric machine 10, by passing a current through the field coils 34, (34A, 34B), a field magnetic flux Φ _F is generated, and the torque can be increased.

10 Rotating machine, 12 stator (1st element), 14 rotor (2nd element), 16 rotating axis, 18 rotary 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 part (first element yoke part), 30 radial teeth, 32 axial teeth, 34 field coil, 36 shoulders, 38 tapered surfaces, 40 Inner corner, 42 rotary core, 44 radial permanent magnet, 46 rotor axial core, 48 axial salient pole, 50 axial permanent magnet, 60 rotary electric machine, 62 rotor (second element), 64 rotor radial part, 66 short circuit ring, 68 Conductor rod.

Claims (10)

A rotary electric machine in which the first element and the second element coaxially arranged with respect to the rotation axis rotate relative to each other around the rotation axis.
The first element is
An annular first element yoke portion, radial teeth projecting from the first element yoke portion in the radial direction orthogonal to the rotation axis and arranged in the circumferential direction around the rotation axis, and an axis line along the rotation axis from the first element yoke portion. A first element core having axial teeth projecting on both sides of the direction and arranged in the circumferential direction.
An armature coil that is toroidally wound around the yoke of the first element and excites radial and axial teeth by flowing an alternating current to generate a rotating magnetic field in the first element.
Have,
The second element is
A second element radial part that faces the radial teeth of the first element in the radial direction and interacts with the rotating magnetic field generated in the first element.
Two second element axial parts that are integrated with the second element radial part and face the axial teeth of the first element on both sides in the axial direction, and are an annular second element axial core part and a second element axial part. A second element axial portion having an axial salient pole protruding from the core portion toward the first element and interacting with a rotating magnetic field generated in the first element.
Have,
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 offset in the circumferential direction.
Further , the second element radial part, the second element axial core part and the axial salient pole of one second element axial part, the first element core, and the axial salient pole and the second element axial core part of the other second element axial part. , A field coil that is wound in an annular shape along the circumferential direction inside a loop that circulates in the order of the second element radial portion, and generates a field magnetic flux in the loop when a direct current flows. ,
Rotating electric machine with. The rotary electric machine according to claim 1, wherein the field coil is arranged close to one of the two second element axial portions, and has a second element rather than the first element yoke portion in the radial direction. A rotary electric machine located closer to the radial part and closer to the second element axial part corresponding to the first element yoke part in the axial direction . The rotary electric machine according to claim 1 , wherein two field coils are provided, one of which is arranged close to one of the second element axial portions and the other of which is arranged close to the other of the second element axial portions in the radial direction. It is located closer to the second element radial part than the first element yoke part, and is located closer to the second element axial part corresponding to the first element yoke part in the axial direction, and is in the same direction for the two field coils. A rotating electric machine in which an electric current is passed through. The rotary electric machine according to any one of claims 1 to 3, wherein the field coil is integrally provided with either one of the first element and the second element. The rotary electric machine according to any one of claims 1 to 4, wherein the second element axial portion has permanent magnets arranged alternately with axial salient poles in the circumferential direction. The rotary electric machine according to any one of claims 1 to 5, wherein the second element radial portion is a rotary electric machine in which a portion having a large magnetic resistance and a portion having a small magnetic resistance are 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 has permanent magnets arranged in the circumferential direction so that the polarities of the surfaces facing the first element alternate. , Rotating electric machine. In the rotary electric machine according to claim 6, the torque generated by the interaction between the rotating magnetic field generated in the first element and the axial portion of the second element is maximized with respect to the phase of the AC current flowing through the armature coil. The position of the axial salient pole in the circumferential direction is determined, and the circumferential direction of the part with large magnetic resistance and the part with low magnetic resistance so that the torque generated by the interaction between the rotating magnetic field generated in the first element and the radial part of the second element is maximized. Rotating electric machine whose position is fixed. In the rotary electric machine according to claim 6, the torque generated by the interaction between the rotating magnetic field generated in the first element and the axial portion of the second element 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 radial portion of the second element is maximized. There is a rotating electric machine. The rotary electric machine according to any one of claims 1 to 5, wherein the second element radial portion is paired with a pair of short-circuit rings arranged apart from each other in the axial direction with the rotation axis as the center. A rotary electric machine having conductor rods arranged in the circumferential direction by connecting short-circuit rings forming the above.

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