Rotating electric machine, compressor, refrigeration device, vehicle

Abstract

The stator (20) has a stator core (30) provided with an armature slot (35a) and an excitation slot (35b), an armature winding (40) housed in the armature slot (35a), an excitation winding (50) housed in the excitation slot (35b), and a first excitation magnet (70). The armature winding (40) generates a rotating magnetic field that rotates the rotor (10) by being supplied with an armature current (i40). The excitation winding (50) generates excitation magnetic flux (M50) by being supplied with an excitation current (i50). The first excitation magnet (70) is capable of changing the magnetic force using the excitation magnetic flux (M50).

Description

Technical Field

[0001] This disclosure relates to a rotary electric motor, a compressor, a refrigeration device, and a vehicle. Background Technology

[0002] Among electric motors, which are a type of rotating electric motor, there is a type called a hybrid excitation flux switching motor (HEFSM). For example, the HEFSM disclosed in Patent Document 1 includes: a stator core having excitation slots and armature slots, a rotor core opposite the stator core with a defined air gap, an excitation winding housed in the excitation slots, an armature winding housed in the armature slots, and a permanent magnet housed in the excitation slots.

[0003] Existing technical documents

[0004] Patent documents

[0005] Patent Document 1: Japanese Patent Publication No. 2016-127610 Summary of the Invention

[0006] -The technical problem the invention aims to solve-

[0007] The rotating electric motor described in Patent Document 1 can only operate in two modes: one with the excitation winding energized and the other without. Therefore, it is difficult to diversify the control options for the rotating electric motor.

[0008] - Technical solutions used to solve technical problems -

[0009] The first aspect of this disclosure relates to a rotary electric machine comprising a rotor 10 and a stator 20 opposed to the rotor 10 at a predetermined gap G. The stator 20 has a stator core 30, an armature winding 40, an excitation winding 50, and a first excitation magnet 70. The stator core 30 is formed in a generally annular shape and is provided with armature slots 35a and excitation slots 35b arranged alternately in the circumferential direction. The armature winding 40 is housed in the armature slots 35a, and the excitation winding 50 and the first excitation magnet 70 are housed in the excitation slots 35b. The armature winding 40 generates a rotating magnetic field that rotates the rotor 10 by being supplied with an alternating armature current i40. The excitation winding 50 generates an excitation flux M50 by being supplied with a direct current excitation current i50. The first excitation magnet 70 is capable of changing its magnetic force using the excitation flux M50.

[0010] In the first aspect, the magnitude and orientation of the magnetic force of the first excitation magnet 70 can be changed using the excitation flux M50. This allows switching, for example, between a first magnetization state where the magnetic force of the first excitation magnet 70 is in the positive direction, a demagnetization state where the magnetic force of the first excitation magnet 70 is substantially zero, and a second magnetization state where the magnetic force of the first excitation magnet 70 is in the opposite direction. It also allows switching between an energized state where an excitation current i50 is supplied to the excitation winding 50 and a de-energized state where no excitation current i50 is supplied to the excitation winding 50. This enables six operating modes, thus diversifying the control of the rotating electric machine 2.

[0011] The second aspect of this disclosure, based on the rotary motor of the first aspect, includes a stator 20 having a second excitation magnet 60 housed in the excitation slot 35b, the second excitation magnet 60 being arranged in magnetic parallel with the first excitation magnet 70, and the magnetic pole surfaces extending circumferentially.

[0012] In the second aspect, six operating modes can be realized, thus enabling diversified control of the rotary motor 2.

[0013] The third aspect of this disclosure, based on the rotary motor of the second aspect, stipulates that, within the operating temperature range of the rotary motor, the maximum value of the coercivity of the first excitation magnet 70 is less than the minimum value of the coercivity of the second excitation magnet 60.

[0014] In the third aspect, the second excitation magnet 60 can be configured in a way that minimizes changes in the magnetic force of the second excitation magnet 60 caused by the excitation flux M50 of the excitation winding 50. In this way, the switching between the first magnetization state, the demagnetization state, and the second magnetization state can be performed appropriately, thereby enabling appropriate control of the rotating electric machine 2.

[0015] The fourth aspect of this disclosure, based on the rotating motor of the third aspect, wherein the first excitation magnet 70 is arranged in the excitation slot 35b on a side further away from the rotor 10 than the second excitation magnet 60.

[0016] In the fourth aspect, compared to the case where the second excitation magnet 60 is arranged in the excitation slot 35b on the side farther away from the rotor 10 than the first excitation magnet 70, the second excitation magnet 60 can be brought closer to the rotor 10. In this way, the magnetic flux of the second excitation magnet 60 can easily link with the rotor 10, and thus the magnetic flux of the second excitation magnet 60 can be effectively utilized.

[0017] The fifth aspect of this disclosure, based on the rotating motor of the fourth aspect, wherein the excitation winding 50 is arranged in the excitation slot 35b on a side further away from the rotor 10 than the first excitation magnet 70.

[0018] In the fifth aspect, compared to the case where the second excitation magnet 60 exists between the excitation winding 50 and the first excitation magnet 70 within the excitation slot 35b, the first excitation magnet 70 can be brought closer to the excitation winding 50. This allows the excitation flux M50 of the excitation winding 50 to pass efficiently through the first excitation magnet 70, thus facilitating changes in the magnetic force of the first excitation magnet 70 caused by the excitation flux M50.

[0019] The sixth aspect of this disclosure, based on the rotating electric motor of the fifth aspect, wherein the circumferential length LC70 of the first excitation magnet 70 is less than or equal to the circumferential length LC60 of the portion of the second excitation magnet 60 away from the rotor 10, and the circumferential length LC70 of the first excitation magnet 70 is less than or equal to the circumferential length LC350 of the portion of the winding receiving portion 350 in the excitation slot 35b that is located near the rotor 10.

[0020] In the sixth aspect, the circumferential end of the first excitation magnet 70 is prevented from protruding from the second excitation magnet 60 when viewed from the rotor 10 side. This suppresses the generation of edge magnetic flux at the circumferential end of the first excitation magnet 70, thus reducing demagnetization of the first excitation magnet 70 caused by edge magnetic flux. Consequently, the magnetic flux of the first excitation magnet 70 can be effectively utilized while operating with a constant magnetic force.

[0021] The seventh aspect of this disclosure, based on the rotating motor of the fourth aspect, wherein the excitation winding 50 is arranged in the excitation slot 35b on a side further away from the rotor 10 than the second excitation magnet 60, and the first excitation magnet 70 is arranged in the excitation slot 35b on a side further away from the rotor 10 than the excitation winding 50.

[0022] In the seventh aspect, compared to the case where the second excitation magnet 60 exists between the excitation winding 50 and the first excitation magnet 70 within the excitation slot 35b, the first excitation magnet 70 can be brought closer to the excitation winding 50. This allows the excitation flux M50 of the excitation winding 50 to pass efficiently through the first excitation magnet 70, thus facilitating changes in the magnetic force of the first excitation magnet 70 caused by the excitation flux M50.

[0023] The eighth aspect of this disclosure, based on the rotating electric motor of the seventh aspect, wherein the circumferential length LC70 of the first excitation magnet 70 is less than or equal to the circumferential length LC350 of the portion of the winding receiving portion 350 of the excitation winding 50 in the excitation slot 35b that is located away from the rotor 10.

[0024] In the eighth aspect, the circumferential end of the first excitation magnet 70 is prevented from protruding from the winding housing 350 when viewed from the rotor 10 side. This suppresses the generation of edge magnetic flux at the circumferential end of the first excitation magnet 70, thereby reducing demagnetization of the first excitation magnet 70 caused by edge magnetic flux. This allows for efficient utilization of the magnetic flux of the first excitation magnet 70.

[0025] The ninth aspect of this disclosure, based on the rotary motor of the fourth aspect, wherein the excitation winding 50 is arranged in the excitation slot 35b on a side further away from the rotor 10 than the second excitation magnet 60, and the first excitation magnet 70 is not sandwiched between the excitation windings 50 in the excitation slot 35b, but is arranged on at least one side of the circumferential sides of the excitation winding 50 and is radially magnetized.

[0026] In the ninth aspect, compared to the case where the second excitation magnet 60 exists between the excitation winding 50 and the first excitation magnet 70 within the excitation slot 35b, the first excitation magnet 70 can be brought closer to the excitation winding 50. This allows the excitation flux M50 of the excitation winding 50 to pass efficiently through the first excitation magnet 70, thus making it easier to change the magnetic force of the first excitation magnet 70 caused by the excitation flux M50.

[0027] The tenth aspect of this disclosure, based on the rotary motor of the first aspect, wherein the rotor 10 has a second excitation magnet 60, and the excitation slot 35b includes a first excitation slot 35c for receiving the excitation winding 50 and the first excitation magnet 70, and a second excitation slot 35d for receiving the excitation winding 50 and the second excitation magnet 60.

[0028] In the tenth aspect, compared with the case where both the first excitation magnet 70 and the second excitation magnet 60 are housed in all excitation slots 35b, the number of the first excitation magnet 70 and the number of the second excitation magnet 60 can be reduced.

[0029] The eleventh aspect of this disclosure is based on the rotary motor of the tenth aspect, wherein the first excitation slot 35c and the second excitation slot 35d are adjacent to each other across the armature slot 35a.

[0030] The twelfth aspect of this disclosure, based on the rotating electric motor of the tenth or eleventh aspect, involves the first excitation magnet 70 being arranged in the first excitation slot 35c on a side further away from the rotor 10 than the excitation winding 50, and the second excitation magnet 60 being arranged in the second excitation slot 35d on a side closer to the rotor 10 than the excitation winding 50.

[0031] In the twelfth aspect, by arranging the first excitation magnet 70 in the first excitation slot 35c on the side farther from the rotor 10 than the excitation winding 50, the first excitation magnet 70 can be moved away from the rotor 10. In this way, the first excitation magnet 70 is less likely to demagnetize.

[0032] By arranging the second excitation magnet 60 in the second excitation slot 35d closer to the rotor 10 than the excitation winding 50, it is possible to bring the second excitation magnet 60 closer to the rotor 10, compared to arranging it further away from the rotor 10 than the excitation winding 50. This makes it easier for the magnetic flux of the second excitation magnet 60 to link with the rotor 10, thus enabling effective utilization of its magnetic flux.

[0033] The thirteenth aspect of this disclosure relates to a compressor comprising a rotary motor according to any one of the first to twelfth aspects.

[0034] The fourteenth aspect of this disclosure relates to a refrigeration apparatus, which includes the compressor of the thirteenth aspect.

[0035] The fifteenth aspect of this disclosure relates to a vehicle comprising a rotary motor according to any one of the first to twelfth aspects. Attached Figure Description

[0036] Figure 1 This is a cross-sectional view illustrating the structure of the rotary electric motor device according to the first embodiment;

[0037] Figure 2 This is a cross-sectional view illustrating the structure of the main parts of the rotary electric machine according to the first embodiment;

[0038] Figure 3 This is a cross-sectional view illustrating the flow of magnetic flux in the first magnetic control according to the first embodiment;

[0039] Figure 4 This is a cross-sectional view illustrating the flow of magnetic flux in the second magnetic control according to the first embodiment;

[0040] Figure 5 This is a simplified diagram illustrating the flow of magnetic flux in the first rotation control of the first embodiment;

[0041] Figure 6 This is a simplified diagram illustrating the flow of magnetic flux in the second rotation control of the first embodiment;

[0042] Figure 7 This is a simplified diagram illustrating the flow of magnetic flux in the third rotation control of the first embodiment;

[0043] Figure 8This is a simplified diagram illustrating the flow of magnetic flux in the fourth rotation control of the first embodiment;

[0044] Figure 9 This is a simplified diagram illustrating the flow of magnetic flux in the fifth rotation control of the first embodiment;

[0045] Figure 10 This is a simplified diagram illustrating the flow of magnetic flux in the sixth rotation control of the first embodiment;

[0046] Figure 11 This is a cross-sectional view illustrating the structure of the rotary electric motor device according to the second embodiment;

[0047] Figure 12 This is a cross-sectional view illustrating the structure of the main parts of the rotary electric machine according to the second embodiment;

[0048] Figure 13 This is a cross-sectional view illustrating the flow of magnetic flux in the first magnetic control of the second embodiment;

[0049] Figure 14 This is a cross-sectional view illustrating the flow of magnetic flux in the second magnetic control according to the second embodiment;

[0050] Figure 15 This is a simplified diagram illustrating the flow of magnetic flux in the first rotation control of the second embodiment;

[0051] Figure 16 This is a simplified diagram illustrating the flow of magnetic flux in the second rotation control according to the second embodiment;

[0052] Figure 17 This is a simplified diagram illustrating the flow of magnetic flux in the third rotation control of the second embodiment;

[0053] Figure 18 This is a simplified diagram illustrating the flow of magnetic flux in the fourth rotation control of the second embodiment;

[0054] Figure 19 This is a simplified diagram illustrating the flow of magnetic flux in the fifth rotation control of the second embodiment;

[0055] Figure 20 This is a simplified diagram illustrating the flow of magnetic flux in the sixth rotation control of the second embodiment;

[0056] Figure 21 This is a cross-sectional view illustrating the structure of the main parts of the rotary electric machine according to the third embodiment;

[0057] Figure 22 This is a cross-sectional view illustrating the structure of the rotary electric motor device according to the fourth embodiment;

[0058] Figure 23 This is a cross-sectional view illustrating the structure of the rotary electric motor device according to the fifth embodiment;

[0059] Figure 24 This is a longitudinal sectional view illustrating the structure of the compressor;

[0060] Figure 25 This is a piping system diagram illustrating the structure of a refrigeration unit;

[0061] Figure 26 It is a simplified diagram illustrating the structure of a vehicle. Detailed Implementation

[0062] The embodiments will now be described in detail with reference to the accompanying drawings. It should be noted that the same or corresponding parts in the drawings are represented by the same symbols, and will not be described again.

[0063] (First Implementation)

[0064] Figure 1 The structure of the rotary motor device 1 according to the first embodiment is illustrated. This rotary motor device 1 includes a rotary motor 2, a control unit 3, and a shaft 4. In this example, the rotary motor 2 is an internal rotor type motor. Specifically, the rotary motor 2 is a hybrid excitation flux switching motor (HEFSM). For example, the rotary motor 2 constituting the motor can be used in automobiles or air conditioning systems, etc., using the shaft 4 connected to the rotor 10 described later to drive the automobile's transmission or the air conditioning system's compressor, etc.

[0065] It should be noted that, in the following description, "axial" refers to the direction of the rotation center axis P of rotor 10, specifically, "axial" refers to the direction of the axis of shaft 4 described later. "Radial" refers to the direction orthogonal to the axial direction, and "circumferential" refers to the direction along the rotation direction of rotor 10. "Radially outer" refers to the side farther from the rotation center axis P, and "radially inner" refers to the side closer to the rotation center axis P. "Cross-section" refers to a cross-section orthogonal to the axial direction.

[0066] [Rotating Electric Machine]

[0067] The rotary motor 2 includes a rotor 10 and a stator 20, which are housed in a housing (not shown). The stator 20 is positioned opposite the rotor 10 with a predetermined gap G between them.

[0068] [Rotor]

[0069] The rotor 10 has a rotor core 11. The rotor core 11 is made of a soft magnetic material. For example, the rotor core 11 is made of a laminated core, which is formed by stamping an electromagnetic steel sheet to form the core components, and then stacking a number of core components along the axial direction.

[0070] In this example, when viewed axially, the rotor core 11 is formed in a gear shape. Specifically, the rotor core 11 has a rotor yoke 12 and a plurality of protrusions 13. Figure 1 In this example, ten protrusions 13 are provided on the rotor core 11. The rotor yoke 12 is formed into a cylindrical shape. Multiple protrusions 13 protrude radially outward from the rotor yoke 12. The multiple protrusions 13 are arranged at equal intervals in the circumferential direction and are opposed to the stator 20 with a small gap G between them. A through hole 15 is formed in the center of the rotor yoke 12. The shaft 4 is inserted into and fixed in the through hole 15.

[0071] It should be noted that the multiple protrusions 13 are provided so that the magnetic reluctance varies depending on the relative position of the rotor 10 with respect to the stator 20. Therefore, the multiple protrusions 13 need not be arranged at strictly equal intervals. The shape of the rotor 10 as viewed from the axial direction can also be other than gear-shaped. For example, the rotor 10 can also be circular by providing a thin-walled rotor core (not shown) in the recesses formed between the protrusions 13 of the rotor core 11.

[0072] 〔stator〕

[0073] The stator 20 has a stator core 30, multiple armature windings 40, multiple excitation windings 50, multiple first excitation magnets 70, and multiple second excitation magnets 60. Figure 1 In the example, the stator core 30 is provided with 12 armature windings 40, 12 excitation windings 50, 12 first excitation magnets 70 and 12 second excitation magnets 60.

[0074] Stator core

[0075] The stator core 30 is made of a soft magnetic material and is formed into a roughly circular ring shape. For example, the stator core 30 is made of a laminated core, which is formed by stamping an electromagnetic steel plate to form the core components, and then stacking many core components along the axial direction to form the laminated core.

[0076] The stator core 30 has a stator yoke 31 and multiple teeth 32. Figure 1 In this example, 24 teeth 32 are provided on the stator core 30. The stator yoke 31 is formed in a circular shape, constituting the outer periphery of the stator core 30. Multiple teeth 32 protrude radially inward from the inner circumferential surface of the stator yoke 31. The multiple teeth 32 are arranged at equal intervals around the rotation central axis P in the circumferential direction. In this way, multiple slots 35 are formed between the multiple teeth 32.

[0077] The multiple slots 35 formed between the multiple teeth 32 are roughly divided into armature slots 35a and excitation slots 35b. Specifically, armature slot 35a is an adjacent slot 35 that spans across another slot 35 in the circumferential direction, and excitation slot 35b is any slot 35 other than armature slot 35a. In other words, in the stator core 30, armature slots 35a and excitation slots 35b are arranged alternately in the circumferential direction.

[0078] exist Figure 1 In the example, 24 slots 35 are provided on the stator core 30. Among the 24 slots 35, 12 slots 35 that cross one slot 35 in the circumferential direction form 12 armature slots 35a, and the remaining 12 slots 35 form 12 excitation slots 35b.

[0079] It should be noted that in the following description, when focusing on a specific component among multiple components such as tooth 32, armature slot 35a, and excitation slot 35b, a branch number is added to the reference numerals of that component. For example, the reference numeral for a specific tooth 32 is "32-1".

[0080] <Armature winding>

[0081] Multiple armature windings 40 have the same structure. The armature windings 40 are housed in armature slots 35a. An alternating armature current i40 is supplied to the armature windings 40 to generate a rotating magnetic field for rotating the rotor 10. For example, the armature windings 40 are three-phase armature windings, and the armature current i40 supplied to the armature windings 40 is a three-phase alternating current.

[0082] In this example, multiple armature windings 40 are housed in multiple armature slots 35a and wound around multiple teeth 32. Specifically, an armature winding 40 is wound on a pair of teeth 32 (hereinafter referred to as "a pair of armature teeth 32a") sandwiched between a pair of circumferentially adjacent armature slots 35a. In other words, a pair of armature teeth 32a is considered as one tooth on which an armature winding 40 is wound in a concentrated winding manner. Specifically, the armature winding 40 is wound around a pair of armature teeth 32a with an axis extending radially as the winding axis.

[0083] If using Figure 1 Specifically, the armature winding 40-1 is wound on a pair of armature teeth 32a, which are composed of two teeth 32-1 and 32-2 sandwiched between two circumferentially adjacent armature slots 35a-1 and 35a-2.

[0084] <excitation winding>

[0085] Multiple excitation windings 50 have the same structure. The excitation windings 50 are housed in excitation slots 35b. The excitation windings 50 are supplied with a DC excitation current i50 to generate an excitation flux M50.

[0086] In this example, multiple excitation windings 50 are housed in multiple excitation slots 35b and wound around multiple teeth 32. Specifically, an excitation winding 50 is wound on a pair of teeth 32 (hereinafter referred to as "a pair of excitation teeth 32b") sandwiched between a pair of circumferentially adjacent excitation slots 35b. In other words, a pair of excitation teeth 32b is considered as one tooth, on which an excitation winding 50 is wound in a concentrated winding manner. Specifically, the excitation winding 50 is wound on the pair of excitation teeth 32b with a radial axis as the winding axis.

[0087] If using Figure 1 Specifically, the excitation winding 50-1 is wound on a pair of excitation teeth 32b, which are composed of two teeth 32-2 and 32-3 sandwiched between two circumferentially adjacent excitation slots 35b-1 and 35b-2.

[0088] In this example, multiple excitation windings 50 are connected in series or parallel so that a common excitation current i50 flows through the multiple excitation windings 50. The multiple excitation windings 50 are wound on multiple pairs of excitation teeth 32b such that the winding directions of two adjacent excitation windings 50 in the circumferential direction are opposite to each other.

[0089] <Magnetic flux of the excitation winding: excitation flux>

[0090] It should be noted that the excitation flux M50 generated around the excitation winding 50 housed in the excitation slot 35b includes flux circulating within the stator core 30 and flux linking with the rotor core 11. In the following description, the flux circulating within the stator core 30 in the excitation flux M50 is referred to as "short-circuit flux M51," and the flux linking with the rotor core 11 in the excitation flux M50 is referred to as "linking flux M52." The short-circuit flux M51 passes through the first excitation magnet 70. The linking flux M52 passes through the rotor core 11. The short-circuit flux M51 is used for magnetizing the first excitation magnet 70. The linking flux M52 helps to increase the torque of the rotor 10.

[0091] <First Excitation Magnet>

[0092] Multiple first excitation magnets 70 have identical structures. The first excitation magnets 70 are housed in excitation slots 35b. In this example, the cross-section of the first excitation magnet 70 is rectangular, and its circumferential length is constant from the radially inward to the radially outward. The axial length of the first excitation magnet 70 is approximately the same as the axial length of the stator core 30.

[0093] The first excitation magnet 70 and the corresponding second excitation magnet 60 are arranged in parallel. With this structure, the direction of magnetic flux flow of the first excitation magnet 70 and the direction of magnetic flux flow of the second excitation magnet 60 can be the same or opposite.

[0094] The first excitation magnet 70 can change its magnetic force using the excitation flux M50 of the excitation winding 50 corresponding to it. Specifically, the first excitation magnet 70 changes the magnetization amount and direction using the excitation flux M50 of the excitation winding 50, thereby changing the magnetic force. In this example, the short-circuit flux M51 of the excitation winding 50 in the excitation slot 35b passes through the first excitation magnet 70 in the excitation slot 35b. The first excitation magnet 70 can change the magnitude and direction of its magnetic force using the short-circuit flux M51 passing through it. In other words, the first excitation magnet 70 can change its magnetization state, i.e., change the intensity and direction of its magnetization, by using the short-circuit flux M51 passing through it and removing the short-circuit flux M51. Generally, increasing or maximizing the magnetization intensity is called "magnetization," while decreasing the magnetization intensity or bringing it close to zero is called "demagnetization" or "demagnetization."

[0095] In this example, the first excitation magnet 70 is positioned radially outward from the second excitation magnet 60. The first excitation magnet 70 is magnetized such that its pole faces extend circumferentially. In other words, the first excitation magnet 70 can be magnetized circumferentially, and the magnetization direction can be circumferential. In this example, multiple first excitation magnets 70 are magnetized such that their pole faces with the same polarity in the circumferential direction face each other. In other words, multiple first excitation magnets 70 are magnetized such that their respective magnetization directions are circumferential, and their pole faces with different polarities alternately face one side of the circumferential direction.

[0096] <Magnetic flux of the first excitation magnet: magnetic flux of the first magnet>

[0097] It should be noted that the magnetic flux of the first excitation magnet 70 includes the magnetic flux circulating within the stator core 30 and the magnetic flux linked with the rotor core 11. In the following description, the magnetic flux of the first excitation magnet 70 is referred to as "first magnet flux M70", the magnetic flux circulating within the stator core 30 of the first magnet flux M70 is referred to as "first short-circuit flux M71", and the magnetic flux linked with the rotor core 11 of the first magnet flux M70 is referred to as "first linkage flux M72".

[0098] <Second Excitation Magnet>

[0099] Multiple second excitation magnets 60 have identical structures. The second excitation magnets 60 are housed in excitation slots 35b. In this example, the cross-section of the second excitation magnet 60 is trapezoidal, with its circumferential length gradually increasing from the radially inward side to the radially outward side. The axial length of the second excitation magnet 60 is approximately the same as the axial length of the stator core 30. It should be noted that the shape of the cross-section of the second excitation magnet 60 is not limited to a trapezoidal shape.

[0100] The magnetic pole faces of the second excitation magnet 60 extend circumferentially. In other words, the second excitation magnet 60 is magnetized circumferentially, and the magnetization direction is along the circumferential direction. In this example, a plurality of second excitation magnets 60 are arranged in a plurality of excitation slots 35b with magnetic pole faces having the same polarity in the circumferential direction facing each other. In other words, a plurality of second excitation magnets 60 are magnetized circumferentially in their respective magnetization directions, and magnetic pole faces with different polarities are arranged alternately facing one side in the circumferential direction.

[0101] <Magnetic flux of the second excitation magnet: magnetic flux of the second magnet>

[0102] It should be noted that the magnetic flux of the second excitation magnet 60 includes the magnetic flux circulating within the stator core 30 and the magnetic flux linked with the rotor core 11. In the following description, the magnetic flux of the second excitation magnet 60 is referred to as "second magnet flux M60", the magnetic flux circulating within the stator core 30 of the second magnet flux M60 is referred to as "second short-circuit flux M61", and the magnetic flux linked with the rotor core 11 of the second magnet flux M60 is referred to as "second linkage flux M62".

[0103] Forward and Reverse

[0104] In the following description, when the flow direction of the first linkage flux M72 of the first excitation magnet 70 is the same as the flow direction of the second linkage flux M62 of the second excitation magnet 60 corresponding to the first excitation magnet 70, the magnetization direction of the first excitation magnet 70 is described as "positive". When the flow direction of the first linkage flux M72 of the first excitation magnet 70 is opposite to the flow direction of the second linkage flux M62 of the second excitation magnet 60 corresponding to the first excitation magnet 70, the magnetization direction of the first excitation magnet 70 is described as "reverse". It should be noted that "the second excitation magnet 60 corresponding to the first excitation magnet 70" refers to the second excitation magnet 60 housed together with the first excitation magnet 70 in the common excitation slot 35b.

[0105] <Magnetized and Demagnetized States>

[0106] The first excitation magnet 70 can switch between a magnetized state and a demagnetized state by changing the magnetic force using the excitation flux M50. The magnetized state is a state with effective magnetic force. The demagnetized state is a state where the magnetic force is essentially zero. For example, in the magnetized state, the first linkage flux M72 of the first excitation magnet 70 is linked with the rotor core 11; in the demagnetized state, the first linkage flux M72 of the first excitation magnet 70 is not linked with the rotor core 11. It should be noted that the magnetization states include: a first magnetization state where the direction of the magnetic force (magnetization direction) of the first excitation magnet 70 is positive, and a second magnetization state where the direction of the magnetic force (magnetization direction) of the first excitation magnet 70 is negative.

[0107] [Magnetic properties of excitation magnets]

[0108] The second excitation magnet 60 is configured to minimize changes in magnetic force caused by the excitation flux M50 of the excitation winding 50. The first excitation magnet 70 is configured such that the magnetic force varies according to the excitation flux M50 of the excitation winding 50.

[0109] In this example, within the operating temperature range of the rotating electric motor 2, the maximum value of the coercivity of the first excitation magnet 70 is smaller than the minimum value of the coercivity of the second excitation magnet 60. For example, the upper limit of the operating temperature range of the rotating electric motor 2 is any one of 100°C, 150°C, and 200°C, and the lower limit of the operating temperature range of the rotating electric motor 2 is any one of 0°C and -50°C.

[0110] The product of "the residual magnetic flux density of the second excitation magnet 60" and "the magnetic pole area of ​​the second excitation magnet 60" can also be larger than the product of "the residual magnetic flux density of the first excitation magnet 70" and "the magnetic pole area of ​​the first excitation magnet 70".

[0111] It should be noted that the second excitation magnet 60 is a magnet that does not substantially produce an irreversible change in magnetic force when the excitation current i50 flows through the excitation winding 50. The second excitation magnet 60 also includes magnets that produce unexpected, minute, and irreversible changes in magnetic force during operation. In other words, the second excitation magnet 60 is a magnet that is relatively difficult to produce an irreversible change in magnetic force when the excitation current i50 flows through the excitation winding 50. Specifically, the second excitation magnet 60 is a magnet that is less likely to produce an irreversible change in magnetic force than the first excitation magnet 70 when the excitation current i50 flows through the excitation winding 50. The second excitation magnet 60 is a magnet used under conditions where the magnetization direction is fixed. For example, the second excitation magnet 60 is preferably a magnet used with a change in magnetic susceptibility of 5% or less.

[0112] The first excitation magnet 70 is a magnet that produces an irreversible change in magnetic force when the excitation current i50 flows through the excitation winding 50. In other words, the first excitation magnet 70 is a magnet that relatively easily produces an irreversible change in magnetic force when the excitation current i50 flows through the excitation winding 50. The first excitation magnet 70 may also be a magnet used in conjunction with a change in magnetization direction. The first excitation magnet 70 may also be a magnet whose coercivity at room temperature (e.g., 25°C) is less than half that of the second excitation magnet 60. For example, the first excitation magnet 70 is a magnet used in conjunction with a change in magnetic susceptibility of approximately 30% or more (preferably 50% or more).

[0113] [Structure inside the excitation slot]

[0114] Figure 2 The structure inside the excitation slot 35b in the first embodiment is illustrated. The excitation slot 35b includes a winding storage portion 350 for storing the excitation winding 50, a second magnet storage portion 351 for storing the second excitation magnet 60, and a first magnet storage portion 352 for storing the first excitation magnet 70.

[0115] In the first embodiment, the first magnet housing portion 352 is arranged further radially outward than the second magnet housing portion 351, and the winding housing portion 350 is arranged further radially outward than the second magnet housing portion 351. With this configuration, in the first embodiment, the first excitation magnet 70 is arranged further radially outward than the second excitation magnet 60 within the excitation slot 35b, and the excitation winding 50 is arranged further radially outward than the first excitation magnet 70 within the excitation slot 35b.

[0116] In the first embodiment, the circumferential length LC70 of the first excitation magnet 70 is less than or equal to the circumferential length LC60 of the radially outer portion of the second excitation magnet 60, and the circumferential length LC70 of the first excitation magnet 70 is less than or equal to the circumferential length LC350 of the radially inner portion of the winding housing portion 350 of the excitation slot 35b.

[0117] It should be noted that, in Figure 2In this example, the first magnet housing 352 is connected to the second magnet housing 351, and the winding housing 350 is connected to the second magnet housing 351. The first excitation magnet 70 and the second excitation magnet 60 are radially adjacent to each other on their outer sides, and the excitation winding 50 is radially adjacent to the first excitation magnet 70 on its outer side. The circumferential length LC70 of the first excitation magnet 70 is the same as the circumferential length LC60 of the radially outer portion of the second excitation magnet 60, and the circumferential length LC70 of the first excitation magnet 70 is shorter than the circumferential length LC350 of the radially inner portion of the winding housing 350. The radial length LR70 of the first excitation magnet 70 is shorter than the circumferential length LC70 of the first excitation magnet 70. The radial length LR70 of the first excitation magnet 70 is shorter than both the radial length LR60 of the second excitation magnet 60 and the radial length LR350 of the winding housing 350. In this way, especially since the first excitation magnet 70 does not have a corner protruding into the stator core 30, it is possible to avoid applying a strong demagnetizing field caused by edge magnetic flux, etc., and to prevent demagnetization without changing the magnetic force during operation.

[0118] exist Figure 2 In this example, the second excitation magnet 60 is positioned opposite the rotor core 11, with a predetermined gap G between them. Therefore, a strong demagnetizing magnetic field is easily applied to the second excitation magnet 60 due to edge magnetic flux, etc. Therefore, it is preferable to increase the coercivity of the second excitation magnet 60 beforehand. For example, the second excitation magnet 60 can be a magnet made of rare earth elements (so-called rare earth magnets). Specifically, the second excitation magnet 60 is preferably a rare earth magnet (neodymium-iron-boron magnet) with neodymium, iron, and boron as its main components. The second excitation magnet 60 is preferably a sintered magnet. It should be noted that the second excitation magnet 60 can also be a bonded magnet. Similar to the second excitation magnet 60, the first excitation magnet 70 can be a neodymium-iron-boron magnet. The first excitation magnet 70 can be an aluminum-iron-nickel-cobalt magnet, a samarium-cobalt magnet, or a ferrite magnet.

[0119] [Control Department]

[0120] like Figure 1 As shown, the control unit 3 supplies armature current i40 to the armature winding 40 and excitation current i50 to the excitation winding 50. The control unit 3 controls the operation of the rotating motor 2 by controlling the armature current i40 and the excitation current i50. In this example, the control unit 3 has a power supply 81 and a control circuit 82.

[0121] <power supply>

[0122] The power supply 81 has an armature power supply section 81a and an excitation power supply section 81b.

[0123] The armature power supply section 81a is electrically connected to a plurality of armature windings 40. In response to the control of the control circuit 82, the armature power supply section 81a supplies an alternating armature current i40 to the plurality of armature windings 40. The structure of the armature power supply section 81a can employ a known power supply structure. For example, the armature power supply section 81a can be constructed from a DC-AC converter.

[0124] The excitation power supply unit 81b is electrically connected to multiple excitation windings 50. In response to the control of the control circuit 82, the excitation power supply unit 81b supplies a DC excitation current i50 to the multiple excitation windings 50. The structure of the excitation power supply unit 81b can employ a known power supply structure. For example, the excitation power supply unit 81b can be constructed using a DC-AC converter. It should be noted that the excitation current i50 supplied when magnetizing / demagnetizing the first excitation magnet 70 can be a pulsed DC current with a very short flow time.

[0125] <Control Circuit>

[0126] The control circuit 82 controls the operation of the rotary motor 2 by controlling the power supply 81. Specifically, the control circuit 82 controls the power supply 81 based on the outputs of various sensors (not shown) that detect various parameters of the rotary motor 2, so that the rotary motor 2 performs the desired operation. For example, the control circuit 82 consists of a processor and a memory electrically connected to the processor and storing the programs and information used to enable the processor to operate.

[0127] [Work status of the control department]

[0128] The control unit 3 of the first embodiment selectively performs first magnetic control, second magnetic control, first rotation control, second rotation control, third rotation control, fourth rotation control, fifth rotation control, and sixth rotation control.

[0129] In the following description, the three armature slots 35a arranged circumferentially will be referred to as "armature slot 35a-1", "armature slot 35a-2", and "armature slot 35a-3". The first excitation slot 35b, located between the first armature slot 35a-1 and the second armature slot 35a-2, will be referred to as "excitation slot 35b-1". The second excitation slot 35b, located between the second armature slot 35a-2 and the third armature slot 35a-3, will be referred to as "excitation slot 35b-2".

[0130] The first tooth 32, which is clamped between the first armature slot 35a-1 and the first excitation slot 35b-1, is designated as "tooth 32-1". The second tooth 32, which is clamped between the first excitation slot 35b-1 and the second armature slot 35a-2, is designated as "tooth 32-2". The third tooth 32, which is clamped between the second armature slot 35a-2 and the second excitation slot 35b-2, is designated as "tooth 32-3". The fourth tooth 32, which is clamped between the second excitation slot 35b-2 and the third armature slot 35a-3, is designated as "tooth 32-4".

[0131] The first excitation magnet 70 and the second excitation magnet 60 housed in the first excitation slot 35b-1 are referred to as "first excitation magnet 70-1" and "second excitation magnet 60-1". The first excitation magnet 70 and the second excitation magnet 60 housed in the second excitation slot 35b-2 are referred to as "first excitation magnet 70-2" and "second excitation magnet 60-2".

[0132] [First Magnetic Control]

[0133] Figure 3 The flow of magnetic flux in the first magnetic control of the first embodiment is illustrated.

[0134] In the first magnetic control, the control unit 3 supplies an excitation current i50 to the plurality of excitation windings 50. The control unit 3 controls the excitation current i50 supplied to the plurality of excitation windings 50 such that in each of the plurality of excitation slots 35b, the short-circuit magnetic flux M51 of the excitation winding 50 in that excitation slot 35b passes through the first excitation magnet 70 in that excitation slot 35b in a positive direction. In this way, the first excitation magnet 70 is magnetized in a positive direction in each of the plurality of excitation slots 35b.

[0135] It should be noted that, in this example, the excitation current i50 supplied to the excitation winding 50 in the first magnetic control is a quasi-pulse current (pulsating DC current) with a flow time of an extremely short duration (e.g., less than 10 ms). The absolute value of the excitation current i50 supplied to the excitation winding 50 in the first magnetic control is larger than the absolute value of the excitation current i50 supplied to the excitation winding 50 in the rotary control described later (specifically, the second, fourth, and sixth rotary controls). For example, the absolute value of the excitation current i50 in the first magnetic control is approximately 1.5 to 10 times the maximum value of the excitation current i50 in the rotary control.

[0136] For example, in the first magnetic force control, the control unit 3 may supply the excitation current i50 to the excitation winding 50 in a manner that the high-level period (energizing period) of the excitation current i50 is maintained for a predetermined time. In the first magnetic force control, the control unit 3 may also supply the excitation current i50 to the excitation winding 50 in a manner that the excitation current i50 becomes a series of pulses at predetermined intervals during a predetermined period.

[0137] In the first magnetic control, the control unit 3 supplies armature current i40 to multiple armature windings 40 as needed. For example, if the load inertia of the rotating motor 2 is large, armature current i40 can also be supplied in the first magnetic control.

[0138] The details of the magnetic flux in the first magnetic control are as follows.

[0139] <Magnetic flux of excitation winding: short-circuit flux>

[0140] In the first magnetic control, the short-circuit flux M51 of the excitation winding 50 in excitation slot 35b-1 passes sequentially from the stator yoke 31 through tooth 32-2, the first excitation magnet 70-1, and tooth 32-1, returning to the stator yoke 31. The short-circuit flux M51 of the excitation winding 50 in excitation slot 35b-1 thus circulates clockwise around the excitation winding 50 of excitation slot 35b-1. It should be noted that the flow direction of the short-circuit flux M51 of the excitation winding 50 in excitation slot 35b-2 is opposite to the flow direction of the short-circuit flux M51 of the excitation winding 50 in excitation slot 35b-1.

[0141] <Magnetic flux of excitation winding: linkage flux>

[0142] In the first magnetic control, the linkage flux M52 of the excitation winding 50 in excitation slot 35b-1 passes sequentially from the stator yoke 31 through tooth 32-3, rotor core 11, and tooth 32-1, returning to the stator yoke 31. The linkage flux M52 of the excitation winding 50 in excitation slot 35b-1 thus circulates clockwise in the stator core 30 and rotor core 11. It should be noted that the flow direction of the linkage flux M52 of the excitation winding 50 in excitation slot 35b-2 is opposite to the flow direction of the linkage flux M52 of the excitation winding 50 in excitation slot 35b-1.

[0143] <Magnetic flux of the second excitation magnet: second short-circuit magnetic flux>

[0144] In the first magnetic control, the second short-circuit flux M61 of the second excitation magnet 60-1 passes sequentially from the second excitation magnet 60-1 through tooth 32-1, the first excitation magnet 70-1, and tooth 32-2, returning to the second excitation magnet 60-1. The second short-circuit flux M61 of the second excitation magnet 60-1 thus circulates clockwise around the second excitation magnet 60-1 and the first excitation magnet 70-1. It should be noted that the flow direction of the second short-circuit flux M61 of the second excitation magnet 60-2 is opposite to the flow direction of the second short-circuit flux M61 of the second excitation magnet 60-1.

[0145] <Magnetic flux of the second excitation magnet: second linkage flux>

[0146] In the first magnetic control, the second linkage flux M62 of the second excitation magnet 60-1 sequentially passes through tooth 32-1, rotor core 11, tooth 32-3, stator yoke 31, and tooth 32-2, returning to the second excitation magnet 60-1. The second linkage flux M62 of the second excitation magnet 60-1 thus circulates counterclockwise in the stator core 30 and rotor core 11. It should be noted that the flow direction of the second linkage flux M62 of the second excitation magnet 60-2 is opposite to the flow direction of the second linkage flux M62 of the second excitation magnet 60-1.

[0147] <The effect of the first magnetic control>

[0148] As described above, by performing first magnetic force control, the magnitude and direction of the magnetic force of the first excitation magnet 70 can be changed, so that the magnetic force of the first excitation magnet 70 becomes stronger in the positive direction. Specifically, when the state of the first excitation magnet 70 is "a first magnetization state in which the magnetization direction of the first excitation magnet 70 is positive," the positive magnetic force acting on the first excitation magnet 70 can be strengthened. When the state of the first excitation magnet 70 is "a second magnetization state in which the magnetization direction of the first excitation magnet 70 is negative," the negative magnetic force acting on the first excitation magnet 70 can be weakened. Furthermore, the state of the first excitation magnet 70 can be switched from the second magnetization state to the demagnetization state, and then further switched from the demagnetization state back to the first magnetization state.

[0149] [Second Magnetic Control]

[0150] Figure 4 The flow of magnetic flux in the second magnetic control of the first embodiment is illustrated.

[0151] In the second magnetic control, the control unit 3 supplies an excitation current i50 to the plurality of excitation windings 50. The control unit 3 controls the excitation current i50 supplied to the plurality of excitation windings 50 such that in each of the plurality of excitation slots 35b, the short-circuit magnetic flux M51 of the excitation winding 50 in that excitation slot 35b passes through the first excitation magnet 70 in that excitation slot 35b in the opposite direction. In this way, in each of the plurality of excitation slots 35b, the first excitation magnet 70 is magnetized in the opposite direction.

[0152] It should be noted that, in this example, similar to the first magnetic control, the excitation current i50 supplied to the excitation winding 50 in the second magnetic control is a quasi-pulse current (pulsating DC current) with a very short flow time. The absolute value of the excitation current i50 supplied to the excitation winding 50 in the second magnetic control is larger than the absolute value of the excitation current i50 supplied to the excitation winding 50 in the rotary control described later (specifically, the second, fourth, and sixth rotary controls). For example, the absolute value of the excitation current i50 in the second magnetic control is approximately 1.5 to 10 times the maximum value of the excitation current i50 in the rotary control.

[0153] Similar to the first magnetic control, in the second magnetic control, the control unit 3 supplies armature current i40 to multiple armature windings 40 as needed. For example, when the load inertia of the rotating motor 2 is large, armature current i40 can also be supplied in the second magnetic control.

[0154] The details of the magnetic flux in the second magnetic control are as follows.

[0155] <Magnetic flux of excitation winding: short-circuit flux>

[0156] The flow direction of the short-circuit flux M51 in the second magnetic control is opposite to the flow direction of the short-circuit flux M51 in the first magnetic control. Specifically, in the second magnetic control, the short-circuit flux M51 of the excitation winding 50 in the excitation slot 35b-1 passes sequentially from the stator yoke 31 through tooth 32-1, the first excitation magnet 70-1, and tooth 32-2, returning to the stator yoke 31. The short-circuit flux M51 of the excitation winding 50 in the excitation slot 35b-1 thus circulates counterclockwise around the excitation winding 50 in the excitation slot 35b-1. It should be noted that the flow direction of the short-circuit flux M51 of the excitation winding 50 in the excitation slot 35b-2 is opposite to the flow direction of the short-circuit flux M51 of the excitation winding 50 in the excitation slot 35b-1.

[0157] <Magnetic flux of excitation winding: linkage flux>

[0158] The flow direction of the linkage flux M52 in the second magnetic control is opposite to that in the first magnetic control. Specifically, in the second magnetic control, the linkage flux M52 of the excitation winding 50 in excitation slot 35b-1 passes sequentially from the stator yoke 31 through tooth 32-1, rotor core 11, and tooth 32-3, returning to the stator yoke 31. The linkage flux M52 of the excitation winding 50 in excitation slot 35b-1 thus circulates counterclockwise in the stator core 30 and rotor core 11. It should be noted that the flow direction of the linkage flux M52 of the excitation winding 50 in excitation slot 35b-2 is opposite to that in excitation slot 35b-1.

[0159] <Magnetic flux of the second excitation magnet>

[0160] The second magnetic flux M60 in the second magnetic control (specifically the second short-circuit flux M61 and the second linkage flux M62) is the same as the second magnetic flux M60 in the first magnetic control.

[0161] <The effect of the second magnetic control>

[0162] As described above, by performing second magnetic force control, the magnitude and direction of the magnetic force of the first excitation magnet 70 can be changed, so that the magnetic force of the first excitation magnet 70 becomes stronger in the opposite direction. Specifically, when the state of the first excitation magnet 70 is "a first magnetization state in which the magnetization direction of the first excitation magnet 70 is positive," the positive magnetic force acting on the first excitation magnet 70 can be weakened. When the state of the first excitation magnet 70 is "a second magnetization state in which the magnetization direction of the first excitation magnet 70 is reversed," the reverse magnetic force acting on the first excitation magnet 70 can be strengthened. Furthermore, the state of the first excitation magnet 70 can be switched from the first magnetization state to the demagnetization state, and then from the demagnetization state to the second magnetization state.

[0163] In the second magnetic control, the second short-circuit flux M61 of the second excitation magnet 60 passes through the first excitation magnet 70 in the opposite direction (specifically, in the opposite direction to the positive direction of the magnetization of the first excitation magnet 70). This promotes the reverse magnetization of the first excitation magnet 70 caused by the short-circuit flux M51 of the excitation winding 50 in the second magnetic control. Therefore, the absolute value of the excitation current i50 in the second magnetic control can be made smaller than the absolute value of the excitation current i50 in the first magnetic control, thereby reducing copper losses in the rotating motor 2. For example, the absolute value of the excitation current i50 in the second magnetic control can be set to half the absolute value of the excitation current i50 in the first magnetic control.

[0164] [First Rotation Control]

[0165] Figure 5 The flow of magnetic flux in the first rotation control of the first embodiment is illustrated.

[0166] In the first rotation control, in each of the plurality of excitation slots 35b, the magnetization direction of the first excitation magnet 70 is set to positive. Thus, the flow direction of the first linkage flux M72 of the first excitation magnet 70 in the excitation slot 35b is the same as the flow direction of the second linkage flux M62 of the second excitation magnet 60 in the same excitation slot 35b.

[0167] In the first rotation control, the control unit 3 supplies armature current i40 to the multiple armature windings 40. This causes the rotor 10 to rotate. It should be noted that the control unit 3 does not supply excitation current i50 to the multiple excitation windings 50.

[0168] The details of the magnetic flux in the first rotation control are as follows.

[0169] <Magnetic flux of the first excitation magnet: first short-circuit flux>

[0170] In the first rotation control, the first short-circuit flux M71 of the first excitation magnet 70-1 passes sequentially through tooth 32-1, stator yoke 31, and tooth 32-2, returning to the first excitation magnet 70-1. The first short-circuit flux M71 of the first excitation magnet 70-1 thus circulates clockwise around the excitation winding 50 of the excitation slot 35b-1. It should be noted that the direction of flow in the first short-circuit flux M71 of the first excitation magnet 70-2 is opposite to the direction of flow in the first short-circuit flux M71 of the first excitation magnet 70-1.

[0171] <Magnetic flux of the first excitation magnet: first linkage flux>

[0172] In the first rotation control, the first linkage flux M72 of the first excitation magnet 70-1 and the first linkage flux M72 of the first excitation magnet 70-2 are combined. The first linkage flux M72 of the first excitation magnets 70-1 and 70-2 passes sequentially from the first excitation magnet 70-1 through tooth 32-1, rotor core 11, tooth 32-3, first excitation magnet 70-2, tooth 32-4, stator yoke 31, tooth 32-2, and returns to the first excitation magnet 70-1. The first linkage flux M72 of the first excitation magnets 70-1 and 70-2 thus circulates counterclockwise in the stator core 30 and rotor core 11.

[0173] <Magnetic flux of the second excitation magnet: second short-circuit magnetic flux>

[0174] In the first rotation control, the second short-circuit flux M61 of the second excitation magnet 60-1 passes sequentially from the second excitation magnet 60-1 through tooth 32-1, stator yoke 31, and tooth 32-2, returning to the second excitation magnet 60-1. The second short-circuit flux M61 of the second excitation magnet 60-1 thus circulates clockwise around the excitation winding 50 of excitation slot 35b-1 and the first excitation magnet 70-1. It should be noted that the flow direction of the second short-circuit flux M61 of the second excitation magnet 60-2 is opposite to the flow direction of the second short-circuit flux M61 of the second excitation magnet 60-1.

[0175] <Magnetic flux of the second excitation magnet: second linkage flux>

[0176] In the first rotation control, the second linkage flux M62 of the second excitation magnet 60-1 and the second linkage flux M62 of the second excitation magnet 60-2 are combined. The second linkage flux M62 of the second excitation magnets 60-1 and 60-2 passes sequentially from the second excitation magnet 60-1 through tooth 32-1, rotor core 11, tooth 32-3, second excitation magnet 60-2, tooth 32-4, stator yoke 31, tooth 32-2, and returns to the second excitation magnet 60-1. The second linkage flux M62 of the second excitation magnets 60-1 and 60-2 thus circulates counterclockwise in the stator core 30 and rotor core 11.

[0177] <Effect of the first rotation control>

[0178] As described above, in the first rotation control, no excitation current i50 is supplied to the excitation winding 50. This reduces the copper losses of the rotary motor 2.

[0179] In the first rotation control, the first linkage flux M72 of the first excitation magnet 70 and the second linkage flux M62 of the second excitation magnet 60 are linked with the rotor core 11. The flow direction of the first linkage flux M72 is the same as the flow direction of the second linkage flux M62. Therefore, the rotor 10 can generate a torque corresponding to the sum of the second linkage flux M62 and the first linkage flux M72.

[0180] For example, the first rotation control is suitable for low-speed / low-torque operation. In low-speed / low-torque operation, the rotary motor 2 is controlled to reduce the rotational speed of the rotor 10 and reduce the rotational torque of the rotor 10. For example, taking the rotary motor 2 as a power source for a car as an example, low-speed / low-torque operation is performed in scenarios such as urban driving.

[0181] [Second Rotation Control]

[0182] Figure 6The flow of magnetic flux in the second rotation control of the first embodiment is illustrated. It should be noted that, in Figure 6 In the example, the short-circuit flux M51, the first short-circuit flux M71, and the second short-circuit flux M61 disappear due to the magnetic field generated by the excitation current i50 supplied to the excitation winding 50.

[0183] In the second rotation control, in each of the plurality of excitation slots 35b, the magnetization direction of the first excitation magnet 70 is set to positive. Thus, the flow direction of the first linkage flux M72 of the first excitation magnet 70 in the excitation slot 35b is the same as the flow direction of the second linkage flux M62 of the second excitation magnet 60 in the same excitation slot 35b.

[0184] In the second rotation control, the control unit 3 supplies armature current i40 to the plurality of armature windings 40. This causes the rotor 10 to rotate. The control unit 3 also supplies excitation current i50 to the plurality of excitation windings 50. The control unit 3 controls the excitation current i50 supplied to the plurality of excitation windings 50 such that, in each of the plurality of excitation slots 35b, the flow direction of the linkage flux M52 of the excitation winding 50 in that excitation slot 35b is the same as the flow direction of the second linkage flux M62 of the second excitation magnet 60 in that excitation slot 35b.

[0185] The details of the magnetic flux in the second rotation control are as follows.

[0186] <Magnetic flux of excitation winding: linkage flux>

[0187] In the second rotation control, the linkage flux M52 of the excitation winding 50 in excitation slot 35b-1 passes sequentially from the stator yoke 31 through tooth 32-1, rotor core 11, and tooth 32-3, returning to the stator yoke 31. The linkage flux M52 of the excitation winding 50 in excitation slot 35b-1 thus circulates counterclockwise in the stator core 30 and rotor core 11. It should be noted that the flow direction of the linkage flux M52 of the excitation winding 50 in excitation slot 35b-2 is opposite to the flow direction of the linkage flux M52 of the excitation winding 50 in excitation slot 35b-1.

[0188] <Magnetic flux of the first excitation magnet: first linkage flux>

[0189] In the second rotation control, the first linkage flux M72 of the first excitation magnet 70-1 sequentially passes through tooth 32-1, rotor core 11, tooth 32-3, stator yoke 31, and tooth 32-2, returning to the first excitation magnet 70-1. The first linkage flux M72 of the first excitation magnet 70-1 thus circulates counterclockwise in the stator core 30 and rotor core 11. It should be noted that the flow direction of the first linkage flux M72 of the first excitation magnet 70-2 is opposite to the flow direction of the first linkage flux M72 of the first excitation magnet 70-1.

[0190] <Magnetic flux of the second excitation magnet: second linkage flux>

[0191] In the second rotation control, the second linkage flux M62 of the second excitation magnet 60-1 sequentially passes through tooth 32-1, rotor core 11, tooth 32-3, stator yoke 31, and tooth 32-2, returning to the second excitation magnet 60-1. The second linkage flux M62 of the second excitation magnet 60-1 thus circulates counterclockwise in the stator core 30 and rotor core 11. It should be noted that the flow direction of the second linkage flux M62 of the second excitation magnet 60-2 is opposite to the flow direction of the second linkage flux M62 of the second excitation magnet 60-1.

[0192] <The effect of the second rotation control>

[0193] As described above, in the second rotation control, the linkage flux M52 of the excitation winding 50, the first linkage flux M72 of the first excitation magnet 70, and the second linkage flux M62 of the second excitation magnet 60 are linked with the rotor core 11. The flow direction of the linkage flux M52 is the same as the flow direction of the second linkage flux M62. The flow direction of the first linkage flux M72 is the same as the flow direction of the second linkage flux M62. Therefore, the rotor 10 can generate a torque corresponding to the sum of the linkage flux M52, the first linkage flux M72, and the second linkage flux M62.

[0194] In the second rotation control, by controlling the excitation current i50, the linkage flux M52 of the excitation winding 50 can be controlled, and as a result, the torque generated in the rotor 10 can be controlled.

[0195] For example, the second rotation control is suitable for low-speed / high-torque operation. In low-speed / high-torque operation, the rotary motor 2 is controlled so that the rotational speed of the rotor 10 becomes lower, and the rotational torque of the rotor 10 becomes higher. For example, taking the rotary motor 2 as the power source of a car as an example, low-speed / high-torque operation is performed in scenarios such as driving on a steep slope, climbing stairs, and starting the car.

[0196] [Third Rotation Control]

[0197] Figure 7 The flow of magnetic flux in the third rotation control of the first embodiment is illustrated.

[0198] In the third rotation control, the first excitation magnet 70 is set to a demagnetized state in each of the plurality of excitation slots 35b. In this way, the magnetic force of the first excitation magnet 70 is substantially zero in each of the plurality of excitation slots 35b.

[0199] In the third rotation control, the control unit 3 supplies armature current i40 to the multiple armature windings 40. This causes the rotor 10 to rotate. It should be noted that the control unit 3 does not supply excitation current i50 to the multiple excitation windings 50.

[0200] The details of the magnetic flux in the third rotation control are as follows.

[0201] <Magnetic flux of the second excitation magnet>

[0202] The second magnet flux M60 in the third rotation control (specifically the second short-circuit flux M61 and the second linkage flux M62) is the same as the second magnet flux M60 in the first rotation control.

[0203] <The effect of the third rotation control>

[0204] As described above, in the third rotation control, no excitation current i50 is supplied to the excitation winding 50. This reduces the copper losses of the rotary motor 2.

[0205] In the third rotation control, the second linkage flux M62 of the second excitation magnet 60 is linked with the rotor core 11. In this way, the rotor 10 can generate a torque corresponding to the second linkage flux M62.

[0206] For example, the third rotation control is suitable for high-speed / low-torque operation. In high-speed / low-torque operation, the rotary motor 2 is controlled to make the rotational speed of the rotor 10 higher and the rotational torque of the rotor 10 lower. For example, taking the rotary motor 2 as the power source of a car as an example, high-speed / low-torque operation is performed in scenarios such as highway cruising.

[0207] [Fourth Rotation Control]

[0208] Figure 8 The flow of magnetic flux in the fourth rotation control of the first embodiment is illustrated. It should be noted that, in Figure 8 In the example, the short-circuit flux M51 and the second short-circuit flux M61 disappear due to the magnetic field generated by the excitation current i50 supplied to the excitation winding 50.

[0209] In the fourth rotation control, the first excitation magnet 70 is set to a demagnetized state in each of the plurality of excitation slots 35b. Thus, the magnetic force of the first excitation magnet 70 is substantially zero in each of the plurality of excitation slots 35b.

[0210] In the fourth rotation control, the control unit 3 supplies armature current i40 to the plurality of armature windings 40. This causes the rotor 10 to rotate. The control unit 3 also supplies excitation current i50 to the plurality of excitation windings 50. The control unit 3 controls the excitation current i50 supplied to the plurality of excitation windings 50 such that, in each of the plurality of excitation slots 35b, the flow direction of the linkage flux M52 of the excitation winding 50 in that excitation slot 35b is the same as the flow direction of the second linkage flux M62 of the second excitation magnet 60 in that excitation slot 35b.

[0211] The details of the magnetic flux in the fourth rotation control are as follows.

[0212] <Magnetic flux of excitation winding>

[0213] The excitation flux M50 (specifically the linking flux M52) in the fourth rotation control is the same as the excitation flux M50 in the second rotation control.

[0214] <Magnetic flux of the second excitation magnet>

[0215] The second magnet flux M60 in the fourth rotation control (specifically the second linkage flux M62) is the same as the second magnet flux M60 in the third rotation control.

[0216] <The Effect of the Fourth Rotation Control>

[0217] As described above, in the fourth rotation control, the linkage flux M52 of the excitation winding 50 and the second linkage flux M62 of the second excitation magnet 60 are linked with the rotor core 11. The flow direction of the linkage flux M52 is the same as the flow direction of the second linkage flux M62. Therefore, the rotor 10 can generate a torque corresponding to the sum of the linkage flux M52 and the second linkage flux M62.

[0218] In the fourth rotation control, by controlling the excitation current i50, the linkage flux M52 of the excitation winding 50 can be controlled, and as a result, the torque generated in the rotor 10 can be controlled.

[0219] For example, the fourth rotary control is suitable for low-speed / high-torque operation.

[0220] [Fifth Rotation Control]

[0221] Figure 9The flow of magnetic flux in the fifth rotation control of the first embodiment is illustrated.

[0222] In the fifth rotation control, in each of the plurality of excitation slots 35b, the magnetization direction of the first excitation magnet 70 is set to be opposite. Thus, the flow direction of the first linkage flux M72 of the first excitation magnet 70 in the excitation slot 35b is opposite to the flow direction of the second linkage flux M62 of the second excitation magnet 60 in the same excitation slot 35b.

[0223] In the fifth rotation control, the control unit 3 supplies armature current i40 to the multiple armature windings 40. This causes the rotor 10 to rotate. It should be noted that the control unit 3 does not supply excitation current i50 to the multiple excitation windings 50.

[0224] The details of the magnetic flux in the fifth rotation control are as follows.

[0225] <Magnetic flux of the first excitation magnet: first short-circuit flux>

[0226] In the fifth rotation control, the flow direction of the first short-circuit flux M71 is opposite to that of the first short-circuit flux M71 in the first rotation control. Specifically, in the fifth rotation control, the first short-circuit flux M71 of the first excitation magnet 70-1 passes sequentially through tooth 32-2, stator yoke 31, and tooth 32-1 from the first excitation magnet 70-1, returning to the first excitation magnet 70-1. The first short-circuit flux M71 of the first excitation magnet 70-1 thus circulates counterclockwise around the excitation winding 50 of the excitation slot 35b-1. It should be noted that the flow direction of the first short-circuit flux M71 in the first excitation magnet 70-2 is opposite to that in the first short-circuit flux M71 of the first excitation magnet 70-1.

[0227] <Magnetic flux of the first excitation magnet: first linkage flux>

[0228] The flow direction of the first linkage flux M72 in the fifth rotation control is opposite to the flow direction of the first linkage flux M72 in the first rotation control. Specifically, in the fifth rotation control, the first linkage flux M72 of the first excitation magnet 70-1 and the first linkage flux M72 of the first excitation magnet 70-2 are combined. The first linkage flux M72 of the first excitation magnets 70-1 and 70-2 passes sequentially from the first excitation magnet 70-1 through tooth 32-2, stator yoke 31, tooth 32-4, first excitation magnet 70-2, tooth 32-3, rotor core 11, and tooth 32-1, returning to the first excitation magnet 70-1. The first linkage flux M72 of the first excitation magnets 70-1 and 70-2 thus circulates clockwise in the stator core 30 and rotor core 11.

[0229] <Magnetic flux of the second excitation magnet>

[0230] The second magnet flux M60 in the fifth rotation control (specifically the second short-circuit flux M61 and the second linkage flux M62) is the same as the second magnet flux M60 in the first rotation control.

[0231] <The Effect of Fifth Rotation Control>

[0232] As described above, in the fifth rotation control, no excitation current i50 is supplied to the excitation winding 50. This reduces the copper losses of the rotary motor 2.

[0233] In the fifth rotation control, the first linkage flux M72 of the first excitation magnet 70 and the second linkage flux M62 of the second excitation magnet 60 are linked with the rotor core 11. The flow direction of the first linkage flux M72 is opposite to the flow direction of the second linkage flux M62. Therefore, the rotor 10 can generate a torque corresponding to the difference between the first linkage flux M72 and the second linkage flux M62.

[0234] For example, the fifth rotary control is suitable for high-speed / low-torque operation.

[0235] [Sixth Rotation Control]

[0236] Figure 10 The flow of magnetic flux in the sixth rotation control of the first embodiment is illustrated. It should be noted that... Figure 10 In the example, the short-circuit flux M51, the first short-circuit flux M71, and the second short-circuit flux M61 disappear due to the magnetic field generated by the excitation current i50 supplied to the excitation winding 50.

[0237] In the sixth rotation control, in each of the plurality of excitation slots 35b, the magnetization direction of the first excitation magnet 70 is set to be opposite. Thus, the flow direction of the first linkage flux M72 of the first excitation magnet 70 in the excitation slot 35b is opposite to the flow direction of the second linkage flux M62 of the second excitation magnet 60 in the same excitation slot 35b.

[0238] In the sixth rotation control, the control unit 3 supplies armature current i40 to the plurality of armature windings 40. This causes the rotor 10 to rotate. The control unit 3 also supplies excitation current i50 to the plurality of excitation windings 50. The control unit 3 controls the excitation current i50 supplied to the plurality of excitation windings 50 such that, in each of the plurality of excitation slots 35b, the flow direction of the linkage flux M52 of the excitation winding 50 in that excitation slot 35b is the same as the flow direction of the second linkage flux M62 of the second excitation magnet 60 in that excitation slot 35b.

[0239] The details of the magnetic flux in the sixth rotation control are as follows.

[0240] <Magnetic flux of excitation winding>

[0241] The excitation flux M50 (specifically the linking flux M52) in the sixth rotation control is the same as the excitation flux M50 in the second rotation control.

[0242] <Magnetic flux of the first excitation magnet: first linkage flux>

[0243] In the sixth rotation control, the flow direction of the first linkage flux M72 is opposite to that of the first linkage flux M72 in the second rotation control. Specifically, in the sixth rotation control, the first linkage flux M72 of the first excitation magnet 70-1 sequentially passes through tooth 32-2, stator yoke 31, tooth 32-3, rotor core 11, and tooth 32-1, returning to the first excitation magnet 70-1. The first linkage flux M72 of the first excitation magnet 70-1 thus circulates clockwise in the stator core 30 and rotor core 11. It should be noted that the flow direction of the first linkage flux M72 of the first excitation magnet 70-2 is opposite to that of the first linkage flux M72 of the first excitation magnet 70-1.

[0244] <Magnetic flux of the second excitation magnet>

[0245] The second magnet flux M60 (specifically the second linkage flux M62) in the sixth rotation control is the same as the second magnet flux M60 in the fifth rotation control.

[0246] <The Effect of the Sixth Rotation Control>

[0247] As described above, in the sixth rotation control, the linkage flux M52 of the excitation winding 50, the first linkage flux M72 of the first excitation magnet 70, and the second linkage flux M62 of the second excitation magnet 60 are linked with the rotor core 11. The flow direction of the linkage flux M52 is the same as the flow direction of the second linkage flux M62. The flow direction of the first linkage flux M72 is opposite to the flow direction of the second linkage flux M62. Therefore, the rotor 10 can generate a torque corresponding to the difference between the sum of the linkage flux M52 and the second linkage flux M62 and the first linkage flux M72.

[0248] In the sixth rotation control, by controlling the excitation current i50, the linkage flux M52 of the excitation winding 50 can be controlled, and as a result, the torque generated in the rotor 10 can be controlled.

[0249] For example, the sixth rotary control is suitable for low-speed / high-torque operation. It should be noted that the sixth rotary control can also be omitted. The same applies to other controls.

[0250] [Effects of the first embodiment]

[0251] As described above, in the rotary electric machine device 1 of the first embodiment, the rotary electric machine 2 includes a rotor 10 and a stator 20. The stator 20 has a stator core 30, an armature winding 40, an excitation winding 50, a first excitation magnet 70, and a second excitation magnet 60. Armature slots 35a and excitation slots 35b are arranged alternately in the circumferential direction on the stator core 30. The armature winding 40 is housed in the armature slot 35a. The excitation winding 50, the first excitation magnet 70, and the second excitation magnet 60 are housed in the excitation slot 35b. The armature winding 40 generates a rotating magnetic field that rotates the rotor 10 by being supplied with an alternating armature current i40. The excitation winding 50 generates an excitation flux M50 by being supplied with a direct current excitation current i50. The magnetic pole face of the second excitation magnet 60 extends in the circumferential direction. The first excitation magnet 70 and the second excitation magnet 60 are arranged in parallel, so that the magnetic force can be changed by using the excitation flux M50.

[0252] In the above structure, the magnitude and orientation of the magnetic force of the first excitation magnet 70 can be changed using the excitation flux M50. This allows switching, for example, between a first magnetization state where the magnetic force of the first excitation magnet 70 is in the positive direction, a demagnetization state where the magnetic force of the first excitation magnet 70 is essentially zero, and a second magnetization state where the magnetic force of the first excitation magnet 70 is in the opposite direction. It also allows switching between an energized state where excitation current i50 is supplied to the excitation winding 50 and a de-energized state where no excitation current i50 is supplied to the excitation winding 50. Thus, six operating modes can be achieved, thereby diversifying the control of the rotating electric machine 2.

[0253] In the rotary electric motor device 1 of the first embodiment, the stator 20 has a second excitation magnet 60 housed in the excitation slot 35b.

[0254] In the above structure, even when the magnetic force of the first excitation magnet 70 is substantially zero, a magnetic flux M60 with a constant direction can be provided by the second excitation magnet 60.

[0255] In the rotary motor device 1 of the first embodiment, the maximum value of the coercivity of the first excitation magnet 70 is smaller than the minimum value of the coercivity of the second excitation magnet 60 within the operating temperature range of the rotary motor 2.

[0256] In the above structure, the second excitation magnet 60 can be configured in a way that minimizes changes in the magnetic force of the second excitation magnet 60 caused by the excitation flux M50 of the excitation winding 50. In this way, the switching between the first magnetization state, the demagnetization state, and the second magnetization state can be performed appropriately, thereby enabling appropriate control of the rotary motor 2.

[0257] In the rotary motor device 1 of the first embodiment, the first excitation magnet 70 is arranged in the excitation slot 35b at a position radially outward compared to the second excitation magnet 60.

[0258] In the above structure, compared to the case where the second excitation magnet 60 is arranged radially outward within the excitation slot 35b compared to the first excitation magnet 70, the second excitation magnet 60 can be positioned closer to the rotor 10. This makes it easier for the magnetic flux of the second excitation magnet 60 to link with the rotor 10, thus enabling effective utilization of the magnetic flux of the second excitation magnet 60.

[0259] In the rotary electric motor device 1 of the first embodiment, the excitation winding 50 is arranged in the excitation slot 35b at a position radially outward from the first excitation magnet 70.

[0260] In the above structure, compared to the case where the second excitation magnet 60 is located between the excitation winding 50 and the first excitation magnet 70 within the excitation slot 35b, the first excitation magnet 70 can be positioned closer to the excitation winding 50. This allows the excitation flux M50 of the excitation winding 50 to efficiently pass through the first excitation magnet 70, thus facilitating changes in the magnetic force of the first excitation magnet 70 caused by the excitation flux M50. Since the first excitation magnet 70 is located on the inner periphery side of the excitation winding 50 when viewed from the excitation winding 50, the excitation flux M50 of the excitation winding 50 preferentially passes through the first excitation magnet 70 compared to the second excitation magnet 60 when magnetizing / demagnetizing the first excitation magnet 70. This makes magnetizing / demagnetizing the first excitation magnet 70 easier, and eliminates the need for rotor 10 positioning.

[0261] In the rotary electric motor device 1 of the first embodiment, the circumferential length LC70 of the first excitation magnet 70 is less than or equal to the circumferential length LC60 of the radially outer portion of the second excitation magnet 60, and less than or equal to the circumferential length LC350 of the radially inner portion of the winding housing portion 350 in the excitation slot 35b.

[0262] In the above structure, the circumferential end of the first excitation magnet 70 is not exposed from the second excitation magnet 60 when viewed from the rotor 10 side. This suppresses the generation of edge magnetic flux at the circumferential end of the first excitation magnet 70, thus reducing demagnetization of the first excitation magnet 70 caused by edge magnetic flux. In this way, the magnetic flux of the first excitation magnet 70 can be effectively utilized while operating with a constant magnetic force.

[0263] (Second Implementation)

[0264] Figure 11The structure of the rotary motor device 1 according to the second embodiment is illustrated. The rotary motor device 1 of the second embodiment differs from that of the rotary motor device 1 of the first embodiment in that the structure within the excitation slot 35b of the stator 20 of the rotary motor 2 is different. The other structural features of the rotary motor device 1 of the second embodiment are the same as those of the rotary motor device 1 of the first embodiment.

[0265] [Structure inside the excitation slot]

[0266] Figure 12 The structure within the excitation slot 35b in the second embodiment is illustrated. The structure within the excitation slot 35b of the second embodiment differs from that of the excitation slot 35b of the first embodiment in that the arrangement of the excitation winding 50 and the first excitation magnet 70 is different. The other structures within the excitation slot 35b of the second embodiment are the same as those in the excitation slot 35b of the first embodiment.

[0267] In the second embodiment, the winding housing portion 350 is arranged radially outward from the second magnet housing portion 351, and the first magnet housing portion 352 is arranged radially outward from the winding housing portion 350. According to this structure, in the second embodiment, the excitation winding 50 is arranged radially outward from the second excitation magnet 60 within the excitation slot 35b, and the first excitation magnet 70 is arranged radially outward from the excitation winding 50 within the excitation slot 35b.

[0268] In the second embodiment, the circumferential length LC70 of the first excitation magnet 70 is less than or equal to the circumferential length LC350 of the radially outer portion of the winding housing portion 350 of the excitation slot 35b.

[0269] It should be noted that, in Figure 12 In this example, the winding housing 350 is connected to the second magnet housing 351, and the first magnet housing 352 is connected to the winding housing 350. The excitation winding 50 is radially adjacent to the outer side of the second excitation magnet 60, and the first excitation magnet 70 is radially adjacent to the outer side of the excitation winding 50. The circumferential length LC70 of the first excitation magnet 70 is the same as the circumferential length LC60 of the radially outer portion of the second excitation magnet 60, and the circumferential length LC70 of the first excitation magnet 70 is shorter than the circumferential length LC350 of the radially inner portion of the winding housing 350. The radial length LR70 of the first excitation magnet 70 is shorter than the circumferential length LC70 of the first excitation magnet 70. The radial length LR70 of the first excitation magnet 70 is shorter than both the radial length LR60 of the second excitation magnet 60 and the radial length LR350 of the winding housing 350.

[0270] [Work status of the control department]

[0271] Similar to the control unit 3 of the first embodiment, the control unit 3 of the second embodiment selectively performs first magnetic force control, second magnetic force control, first rotation control, second rotation control, third rotation control, fourth rotation control, fifth rotation control, and sixth rotation control.

[0272] [First Magnetic Control]

[0273] Figure 13 The flow of magnetic flux in the first magnetic control of the second embodiment is illustrated.

[0274] The operation of the control unit 3 in the first magnetic control of the second embodiment is the same as that of the control unit 3 in the first magnetic control of the first embodiment. Details of the magnetic flux in the first magnetic control of the second embodiment are as follows.

[0275] <Magnetic flux of excitation winding: short-circuit flux>

[0276] In the first magnetic control, the short-circuit flux M51 of the excitation winding 50 in excitation slot 35b-1 passes sequentially from the second excitation magnet 60-1 through tooth 32-2, the first excitation magnet 70-1, and tooth 32-1, returning to the second excitation magnet 60-1. The short-circuit flux M51 of the excitation winding 50 in excitation slot 35b-1 thus circulates counterclockwise around the excitation winding 50 in excitation slot 35b-1. It should be noted that the flow direction of the short-circuit flux M51 of the excitation winding 50 in excitation slot 35b-2 is opposite to the flow direction of the short-circuit flux M51 of the excitation winding 50 in excitation slot 35b-1.

[0277] <Magnetic flux of excitation winding: linkage flux>

[0278] In the first magnetic control, the linkage flux M52 of the excitation winding 50 in excitation slot 35b-1 passes sequentially from the stator yoke 31 through tooth 32-1, rotor core 11, and tooth 32-3, returning to the stator yoke 31. The linkage flux M52 of the excitation winding 50 in excitation slot 35b-1 thus circulates counterclockwise in the stator core 30 and rotor core 11. It should be noted that the flow direction of the linkage flux M52 of the excitation winding 50 in excitation slot 35b-2 is opposite to the flow direction of the linkage flux M52 of the excitation winding 50 in excitation slot 35b-1.

[0279] <Magnetic flux of the second excitation magnet: second short-circuit magnetic flux>

[0280] In the first magnetic control, the second short-circuit flux M61 of the second excitation magnet 60-1 passes sequentially from the second excitation magnet 60-1 through tooth 32-1, the first excitation magnet 70-1, and tooth 32-2, returning to the second excitation magnet 60-1. The second short-circuit flux M61 of the second excitation magnet 60-1 thus circulates clockwise around the excitation winding 50 of the excitation slot 35b-1. It should be noted that the flow direction of the second short-circuit flux M61 of the second excitation magnet 60-2 is opposite to the flow direction of the second short-circuit flux M61 of the second excitation magnet 60-1.

[0281] <Magnetic flux of the second excitation magnet: second linkage flux>

[0282] In the first magnetic control, the second linkage flux M62 of the second excitation magnet 60-1 sequentially passes through tooth 32-1, rotor core 11, tooth 32-3, stator yoke 31, and tooth 32-2, returning to the second excitation magnet 60-1. The second linkage flux M62 of the second excitation magnet 60-1 thus circulates counterclockwise in the stator core 30 and rotor core 11. It should be noted that the flow direction of the second linkage flux M62 of the second excitation magnet 60-2 is opposite to the flow direction of the second linkage flux M62 of the second excitation magnet 60-1.

[0283] <The effect of the first magnetic control>

[0284] In the first magnetic control of the second embodiment, the same effect as the first magnetic control of the first embodiment can be achieved.

[0285] [Second Magnetic Control]

[0286] Figure 14 The flow of magnetic flux in the second magnetic control of the second embodiment is illustrated.

[0287] The operation of the control unit 3 in the second magnetic control of the second embodiment is the same as that of the control unit 3 in the second magnetic control of the first embodiment. Details of the magnetic flux in the second magnetic control of the second embodiment are as follows.

[0288] <Magnetic flux of excitation winding: short-circuit flux>

[0289] The flow direction of the short-circuit flux M51 in the second magnetic control is opposite to the flow direction of the short-circuit flux M51 in the first magnetic control. Specifically, in the second magnetic control, the short-circuit flux M51 of the excitation winding 50 in the excitation slot 35b-1 passes sequentially from the second excitation magnet 60-1 through tooth 32-1, the first excitation magnet 70-1, and tooth 32-2, returning to the second excitation magnet 60-1. The short-circuit flux M51 of the excitation winding 50 in the excitation slot 35b-1 thus circulates clockwise around the excitation winding 50 of the excitation slot 35b-1. It should be noted that the flow direction of the short-circuit flux M51 of the excitation winding 50 in the excitation slot 35b-2 is opposite to the flow direction of the short-circuit flux M51 of the excitation winding 50 in the excitation slot 35b-1.

[0290] <Magnetic flux of excitation winding: linkage flux>

[0291] The flow direction of the linkage flux M52 in the second magnetic control is opposite to that in the first magnetic control. Specifically, in the second magnetic control, the linkage flux M52 of the excitation winding 50 in the excitation slot 35b-1 passes sequentially from the stator yoke 31 through the tooth 32-3, the rotor core 11, and the tooth 32-1, returning to the stator yoke 31. The linkage flux M52 of the excitation winding 50 in the excitation slot 35b-1 thus circulates clockwise in the stator core 30 and the rotor core 11. It should be noted that the flow direction of the linkage flux M52 of the excitation winding 50 in the excitation slot 35b-2 is opposite to that in the excitation winding 50 in the excitation slot 35b-1.

[0292] <Magnetic flux of the second excitation magnet>

[0293] The second magnetic flux M60 in the second magnetic control (specifically the second short-circuit flux M61 and the second linkage flux M62) is the same as the second magnetic flux M60 in the first magnetic control.

[0294] <The effect of the second magnetic control>

[0295] In the second magnetic control of the second embodiment, the same effect as the second magnetic control of the first embodiment can be achieved.

[0296] [First Rotation Control]

[0297] Figure 15 The flow of magnetic flux in the first rotation control of the second embodiment is illustrated.

[0298] In the first rotation control, the magnetization direction of the first excitation magnet 70 is set to positive. The operation of the control unit 3 in the first rotation control of the second embodiment is the same as that of the control unit 3 in the first rotation control of the first embodiment. Details of the magnetic flux in the first rotation control of the second embodiment are described below.

[0299] <Magnetic flux of the first excitation magnet: first short-circuit flux>

[0300] In the first rotation control, the first short-circuit flux M71 of the first excitation magnet 70-1 passes sequentially through tooth 32-1, stator yoke 31, and tooth 32-2, returning to the first excitation magnet 70-1. The first short-circuit flux M71 of the first excitation magnet 70-1 thus circulates clockwise between the first excitation magnet 70-1 and the stator yoke 31. It should be noted that the direction of flow in the first short-circuit flux M71 of the first excitation magnet 70-2 is opposite to the direction of flow in the first short-circuit flux M71 of the first excitation magnet 70-1.

[0301] <Magnetic flux of the first excitation magnet: first linkage flux>

[0302] In the first rotation control, the first linkage flux M72 of the first excitation magnet 70-1 and the first linkage flux M72 of the first excitation magnet 70-2 are combined. The first linkage flux M72 of the first excitation magnets 70-1 and 70-2 passes sequentially from the first excitation magnet 70-1 through tooth 32-1, rotor core 11, tooth 32-3, second excitation magnet 60-2, tooth 32-4, stator yoke 31, tooth 32-2, and returns to the first excitation magnet 70-1. The first linkage flux M72 of the first excitation magnets 70-1 and 70-2 thus circulates counterclockwise in the stator core 30 and rotor core 11.

[0303] <Magnetic flux of the second excitation magnet: second short-circuit magnetic flux>

[0304] In the first rotation control, the second short-circuit flux M61 of the second excitation magnet 60-1 passes sequentially from the second excitation magnet 60-1 through tooth 32-1, the first excitation magnet 70-1, and tooth 32-2, and returns to the second excitation magnet 60-1. The second short-circuit flux M61 of the second excitation magnet 60-1 thus circulates clockwise around the excitation winding 50 of the excitation slot 35b-1. It should be noted that the flow direction of the second short-circuit flux M61 of the second excitation magnet 60-2 is opposite to the flow direction of the second short-circuit flux M61 of the second excitation magnet 60-1.

[0305] <Magnetic flux of the second excitation magnet: second linkage flux>

[0306] In the first rotation control, the second linkage flux M62 of the second excitation magnet 60-1 and the second linkage flux M62 of the second excitation magnet 60-2 are combined. The second linkage flux M62 of the second excitation magnets 60-1 and 60-2 passes sequentially from the second excitation magnet 60-1 through tooth 32-1, rotor core 11, tooth 32-3, second excitation magnet 60-2, tooth 32-4, stator yoke 31, tooth 32-2, and returns to the second excitation magnet 60-1. The second linkage flux M62 of the second excitation magnets 60-1 and 60-2 thus circulates counterclockwise in the stator core 30 and rotor core 11.

[0307] <Effect of the first rotation control>

[0308] In the first rotation control of the second embodiment, the same effect as the first rotation control of the first embodiment can be achieved.

[0309] [Second Rotation Control]

[0310] Figure 16 The flow of magnetic flux in the second rotation control according to the second embodiment is illustrated. It should be noted that, in Figure 16 In the example, the short-circuit flux M51, the first short-circuit flux M71, and the second short-circuit flux M61 disappear due to the magnetic field generated by the excitation current i50 supplied to the excitation winding 50.

[0311] In the second rotation control, the magnetization direction of the first excitation magnet 70 is set to positive. The operation of the control unit 3 in the second rotation control of the second embodiment is the same as that of the control unit 3 in the second rotation control of the first embodiment. The details of the magnetic flux in the second rotation control of the second embodiment are as follows.

[0312] <Magnetic flux of excitation winding: linkage flux>

[0313] In the second rotation control, the linkage flux M52 of the excitation winding 50 in excitation slot 35b-1 passes sequentially from the stator yoke 31 through tooth 32-1, rotor core 11, and tooth 32-3, returning to the stator yoke 31. The linkage flux M52 of the excitation winding 50 in excitation slot 35b-1 thus circulates counterclockwise in the stator core 30 and rotor core 11. It should be noted that the flow direction of the linkage flux M52 of the excitation winding 50 in excitation slot 35b-2 is opposite to the flow direction of the linkage flux M52 of the excitation winding 50 in excitation slot 35b-1.

[0314] <Magnetic flux of the first excitation magnet: first linkage flux>

[0315] In the second rotation control, the first linkage flux M72 of the first excitation magnet 70-1 sequentially passes through tooth 32-1, rotor core 11, tooth 32-3, stator yoke 31, and tooth 32-2, returning to the first excitation magnet 70-1. The first linkage flux M72 of the first excitation magnet 70-1 thus circulates counterclockwise in the stator core 30 and rotor core 11. It should be noted that the flow direction of the first linkage flux M72 of the first excitation magnet 70-2 is opposite to the flow direction of the first linkage flux M72 of the first excitation magnet 70-1.

[0316] <Magnetic flux of the second excitation magnet: second linkage flux>

[0317] In the second rotation control, the second linkage flux M62 of the second excitation magnet 60-1 sequentially passes through tooth 32-1, rotor core 11, tooth 32-3, stator yoke 31, and tooth 32-2, returning to the second excitation magnet 60-1. The second linkage flux M62 of the second excitation magnet 60-1 thus circulates counterclockwise in the stator core 30 and rotor core 11. It should be noted that the flow direction of the second linkage flux M62 of the second excitation magnet 60-2 is opposite to the flow direction of the second linkage flux M62 of the second excitation magnet 60-1.

[0318] <The effect of the second rotation control>

[0319] In the second rotation control of the second embodiment, the same effect as the second rotation control of the first embodiment can be achieved.

[0320] In the second rotation control of the second embodiment, the short-circuit flux M51 of the excitation winding 50 passes through the first excitation magnet 70 in the positive direction. Since the direction in which the short-circuit flux M51 passes through the first excitation magnet 70 is the same as the magnetization direction of the first excitation magnet 70, demagnetization of the first excitation magnet 70 caused by the short-circuit flux M51 is less likely. Thus, when the rotary motor 2 is running, the first excitation magnet 70 is less likely to demagnetize, thereby improving the operating efficiency of the rotary motor 2.

[0321] [Third Rotation Control]

[0322] Figure 17 The flow of magnetic flux in the third rotation control of the second embodiment is illustrated.

[0323] In the third rotation control, the first excitation magnet 70 is set to a demagnetized state. The operation of the control unit 3 in the third rotation control of the second embodiment is the same as that of the control unit 3 in the third rotation control of the first embodiment. The details of the magnetic flux in the third rotation control of the second embodiment are as follows.

[0324] <Magnetic flux of the second excitation magnet>

[0325] The second magnet flux M60 in the third rotation control (specifically the second short-circuit flux M61 and the second linkage flux M62) is the same as the second magnet flux M60 in the first rotation control.

[0326] <The effect of the third rotation control>

[0327] In the third rotation control of the second embodiment, the same effect as the third rotation control of the first embodiment can be achieved.

[0328] [Fourth Rotation Control]

[0329] Figure 18 The flow of magnetic flux in the fourth rotation control of the second embodiment is illustrated. It should be noted that, in Figure 18 In the example, the short-circuit flux M51 and the second short-circuit flux M61 disappear due to the magnetic field generated by the excitation current i50 supplied to the excitation winding 50.

[0330] In the fourth rotation control, the first excitation magnet 70 is set to a demagnetized state. The operation of the control unit 3 in the fourth rotation control of the second embodiment is the same as that of the control unit 3 in the fourth rotation control of the first embodiment. The details of the magnetic flux in the fourth rotation control of the second embodiment are as follows.

[0331] <Magnetic flux of excitation winding>

[0332] The excitation flux M50 (specifically the linking flux M52) in the fourth rotation control is the same as the excitation flux M50 in the second rotation control.

[0333] <Magnetic flux of the second excitation magnet>

[0334] The second magnet flux M60 in the fourth rotation control (specifically the second linkage flux M62) is the same as the second magnet flux M60 in the third rotation control.

[0335] <The Effect of the Fourth Rotation Control>

[0336] In the fourth rotation control of the second embodiment, the same effect as the fourth rotation control of the first embodiment can be achieved.

[0337] [Fifth Rotation Control]

[0338] Figure 19 The flow of magnetic flux in the fifth rotation control of the second embodiment is illustrated.

[0339] In the fifth rotation control, the magnetization direction of the first excitation magnet 70 is set to the opposite direction. The operation of the control unit 3 in the fifth rotation control of the second embodiment is the same as that of the control unit 3 in the fifth rotation control of the first embodiment. The details of the magnetic flux in the fifth rotation control of the second embodiment are as follows.

[0340] <Magnetic flux of the first excitation magnet: first short-circuit flux>

[0341] In the fifth rotation control, the flow direction of the first short-circuit flux M71 is opposite to that of the first short-circuit flux M71 in the first rotation control. Specifically, in the fifth rotation control, the first short-circuit flux M71 of the first excitation magnet 70-1 flows sequentially from the first excitation magnet 70-1 through tooth 32-1, stator yoke 31, and tooth 32-2, returning to the first excitation magnet 70-1. The first short-circuit flux M71 of the first excitation magnet 70-1 thus circulates counterclockwise between the first excitation magnet 70-1 and the stator yoke 31. It should be noted that the flow direction of the first short-circuit flux M71 in the first excitation magnet 70-2 is opposite to that in the first short-circuit flux M71 of the first excitation magnet 70-1.

[0342] <Magnetic flux of the first excitation magnet: first linkage flux>

[0343] The flow direction of the first linkage flux M72 in the fifth rotation control is opposite to the flow direction of the first linkage flux M72 in the first rotation control. Specifically, in the fifth rotation control, the first linkage flux M72 of the first excitation magnet 70-1 and the first linkage flux M72 of the first excitation magnet 70-2 are combined. The first linkage flux M72 of the first excitation magnets 70-1 and 70-2 passes sequentially from the first excitation magnet 70-1 through tooth 32-1, rotor core 11, tooth 32-3, second excitation magnet 60-2, tooth 32-4, stator yoke 31, tooth 32-2, and returns to the first excitation magnet 70-1. The first linkage flux M72 of the first excitation magnets 70-1 and 70-2 thus circulates clockwise in the stator core 30 and rotor core 11.

[0344] <Magnetic flux of the second excitation magnet>

[0345] The second magnet flux M60 in the fifth rotation control (specifically the second short-circuit flux M61 and the second linkage flux M62) is the same as the second magnet flux M60 in the first rotation control.

[0346] <The Effect of Fifth Rotation Control>

[0347] In the fifth rotation control of the second embodiment, the same effect as the fifth rotation control of the first embodiment can be achieved.

[0348] [Sixth Rotation Control]

[0349] Figure 20 The flow of magnetic flux in the sixth rotation control of the second embodiment is illustrated. It should be noted that... Figure 20 In the example, the short-circuit flux M51, the first short-circuit flux M71, and the second short-circuit flux M61 disappear due to the magnetic field generated by the excitation current i50 supplied to the excitation winding 50.

[0350] In the sixth rotation control, the magnetization direction of the first excitation magnet 70 is set to the opposite direction. The operation of the control unit 3 in the sixth rotation control of the second embodiment is the same as that of the control unit 3 in the sixth rotation control of the first embodiment. The details of the magnetic flux in the sixth rotation control of the second embodiment are as follows.

[0351] <Magnetic flux of excitation winding>

[0352] The excitation flux M50 (specifically the linking flux M52) in the sixth rotation control is the same as the excitation flux M50 in the second rotation control.

[0353] <Magnetic flux of the first excitation magnet: first linkage flux>

[0354] In the sixth rotation control, the flow direction of the first linkage flux M72 is opposite to that of the first linkage flux M72 in the second rotation control. Specifically, in the second rotation control, the first linkage flux M72 of the first excitation magnet 70-1 flows sequentially from the first excitation magnet 70-1 through tooth 32-2, stator yoke 31, tooth 32-3, rotor core 11, and tooth 32-1, returning to the first excitation magnet 70-1. The first linkage flux M72 of the first excitation magnet 70-1 thus circulates clockwise in the stator core 30 and rotor core 11. It should be noted that the flow direction of the first linkage flux M72 of the first excitation magnet 70-2 is opposite to that of the first linkage flux M72 of the first excitation magnet 70-1.

[0355] <Magnetic flux of the second excitation magnet>

[0356] The second magnet flux M60 (specifically the second linkage flux M62) in the sixth rotation control is the same as the second magnet flux M60 in the fifth rotation control.

[0357] <The Effect of the Sixth Rotation Control>

[0358] In the sixth rotation control of the second embodiment, the same effect as the sixth rotation control of the first embodiment can be achieved. It should be noted that the sixth rotation control can also be omitted. The other controls are the same.

[0359] [Effects of the Second Implementation]

[0360] The rotary motor device 1 of the second embodiment can achieve the same effects as the rotary motor device 1 of the first embodiment. For example, it can realize six operating modes, thus enabling diversified control of the rotary motor 2.

[0361] In the rotary electric motor device 1 of the second embodiment, the excitation winding 50 is arranged radially outward within the excitation slot 35b, relative to the second excitation magnet 60. The first excitation magnet 70 is also arranged radially outward within the excitation slot 35b, relative to the excitation winding 50.

[0362] In the above structure, compared to the case where the second excitation magnet 60 is located between the excitation winding 50 and the first excitation magnet 70 within the excitation slot 35b, the first excitation magnet 70 can be brought closer to the excitation winding 50. This allows the excitation flux M50 of the excitation winding 50 to pass efficiently through the first excitation magnet 70, thus facilitating changes in the magnetic force of the first excitation magnet 70 caused by the excitation flux M50.

[0363] In the rotary electric motor device 1 of the second embodiment, the circumferential length LC70 of the first excitation magnet 70 is less than or equal to the circumferential length LC350 of the radially outer portion of the winding housing portion 350 in the excitation slot 35b.

[0364] In the above structure, the circumferential end of the first excitation magnet 70 is prevented from protruding from the winding housing 350 when viewed from the rotor 10 side. This suppresses the generation of edge magnetic flux at the circumferential end of the first excitation magnet 70, thus reducing demagnetization of the first excitation magnet 70 caused by edge magnetic flux. In this way, the magnetic flux of the first excitation magnet 70 can be utilized effectively.

[0365] (Third Implementation)

[0366] The rotary motor device 1 of the third embodiment differs from that of the rotary motor device 1 of the first embodiment in that the structure within the excitation slot 35b of the stator 20 of the rotary motor 2 is different. The other structures of the rotary motor device 1 of the third embodiment are the same as those of the rotary motor device 1 of the first embodiment.

[0367] [Structure inside the excitation slot]

[0368] Figure 21The structure within the excitation slot 35b in the third embodiment is illustrated. The structure within the excitation slot 35b of the third embodiment differs from that of the excitation slot 35b of the first embodiment in that the arrangement of the excitation winding 50 and the first excitation magnet 70 is different. The other structures within the excitation slot 35b of the third embodiment are the same as those in the excitation slot 35b of the first embodiment.

[0369] In the third embodiment, the winding housing portion 350 is arranged radially outward from the second magnet housing portion 351. The first magnet housing portion 352 is not sandwiched between the winding housing portions 350, but is arranged on at least one of the circumferential sides of the winding housing portion 350. With this structure, the excitation winding 50 is arranged radially outward from the second excitation magnet 60 within the excitation slot 35b. The first excitation magnet 70 is not sandwiched between the excitation windings 50 within the excitation slot 35b, but is arranged on at least one of the circumferential sides of the excitation winding 50. The first excitation magnet 70 is radially magnetized.

[0370] exist Figure 21 In this example, the first excitation magnet 70 is arranged on both sides of the excitation winding 50 within the excitation slot 35b. Thus, two first excitation magnets 70 are housed within one excitation slot 35b. The first excitation magnets 70 are magnetized such that their pole faces extend radially. In other words, the first excitation magnets 70 can be magnetized radially, and the magnetization direction can be radial. It should be noted that... Figure 21 The positive direction of the first excitation magnet 70 on the right is from Figure 21 The upper side faces the lower side. Figure 21 The positive direction of the first excitation magnet 70 on the left is from Figure 21 The bottom side faces the top side.

[0371] [Work status of the control department]

[0372] Similar to the control unit 3 of the first embodiment, the control unit 3 of the second embodiment selectively performs first magnetic force control, second magnetic force control, first rotation control, second rotation control, third rotation control, fourth rotation control, fifth rotation control, and sixth rotation control.

[0373] [Effects of the Third Implementation]

[0374] In the rotary motor device 1 of the third embodiment, the same effects as those of the rotary motor device 1 of the first embodiment can be achieved. For example, six operating modes can be realized, thus enabling diversified control of the rotary motor 2.

[0375] In the rotary electric motor device 1 of the third embodiment, the excitation winding 50 is arranged radially outward within the excitation slot 35b, relative to the second excitation magnet 60. The first excitation magnet 70 is not sandwiched between the excitation windings 50 within the excitation slot 35b, but is arranged on at least one of the circumferential sides of the excitation winding 50. The first excitation magnet 70 is radially magnetized.

[0376] In the above structure, compared to the case where the second excitation magnet 60 is located between the excitation winding 50 and the first excitation magnet 70 within the excitation slot 35b, the first excitation magnet 70 can be brought closer to the excitation winding 50. This allows the excitation flux M50 of the excitation winding 50 to pass efficiently through the first excitation magnet 70, thus facilitating changes in the magnetic force of the first excitation magnet 70 caused by the excitation flux M50.

[0377] (Fourth Implementation)

[0378] Figure 22 The structure of the rotary motor device 1 according to the fourth embodiment is illustrated. The rotary motor device 1 of the fourth embodiment differs from the rotary motor device 1 of the second embodiment in that the structure within the excitation slot 35b of the stator 20 of the rotary motor 2 is different. The other structural features of the rotary motor device 1 of the fourth embodiment are the same as those of the rotary motor device 1 of the second embodiment.

[0379] [Structure inside the excitation slot]

[0380] In the fourth embodiment, the second excitation magnet 60 is omitted in the excitation slot 35b. The first excitation magnet 70 is arranged in the excitation slot 35b at a position radially outward from the excitation winding 50.

[0381] [Forward and Reverse]

[0382] In the fourth embodiment, the "positive" magnetization direction of the first excitation magnet 70 is a predetermined magnetization direction. In the fourth embodiment, the "negative" magnetization direction of the first excitation magnet 70 is the direction opposite to the predetermined magnetization direction.

[0383] [Work status of the control department]

[0384] Similar to the control unit 3 in the second embodiment, the control unit 3 in the fourth embodiment selectively performs first magnetic force control, second magnetic force control, first rotation control, second rotation control, third rotation control, fourth rotation control, fifth rotation control, and sixth rotation control.

[0385] [Effects of the Fourth Implementation]

[0386] In the rotary motor device 1 of the fourth embodiment, the same effects as those of the rotary motor device 1 of the second embodiment can be achieved. For example, six operating modes can be realized, thus enabling diversified control of the rotary motor 2.

[0387] (Fifth Implementation)

[0388] Figure 23 The structure of the rotary motor device 1 according to the fifth embodiment is illustrated. The rotary motor device 1 of the fifth embodiment differs from the rotary motor device 1 of the first embodiment in that the structure within the excitation slot 35b of the stator 20 of the rotary motor 2 is different. The other structural features of the rotary motor device 1 of the fifth embodiment are the same as those of the rotary motor device 1 of the first embodiment.

[0389] In the fifth embodiment, the excitation slot 35b includes a first excitation slot 35c and a second excitation slot 35d. The first excitation slot 35c houses the excitation winding 50 and the first excitation magnet 70. The second excitation slot 35d houses the excitation winding 50 and the second excitation magnet 60.

[0390] In this example, the first excitation slot 35c and the second excitation slot 35d are adjacent to each other across the armature slot 35a. Figure 23 In the middle, the first excitation slot 35c, armature slot 35a, second excitation slot 35d, and armature slot 35a are arranged circumferentially.

[0391] In the first excitation slot 35c, the first excitation magnet 70 is arranged radially outward from the excitation winding 50. In the second excitation slot 35d, the second excitation magnet 60 is arranged radially inward from the excitation winding 50.

[0392] [Work status of the control department]

[0393] Similar to the control unit 3 in the first embodiment, the control unit 3 in the fifth embodiment selectively performs first magnetic force control, second magnetic force control, first rotation control, second rotation control, third rotation control, fourth rotation control, fifth rotation control, and sixth rotation control.

[0394] [Effects of the Fifth Implementation]

[0395] In the rotary motor device 1 of the fifth embodiment, the same effects as those of the rotary motor device 1 of the first embodiment can be achieved. For example, six operating modes can be realized, thus enabling diversified control of the rotary motor 2.

[0396] In the rotary motor device 1 of the fifth embodiment, the excitation slot 35b includes: a first excitation slot 35c that houses the first excitation magnet 70 but not the second excitation magnet 60, and a second excitation slot 35d that houses the second excitation magnet 60 but not the first excitation magnet 70.

[0397] With this structure, compared to housing both the first excitation magnet 70 and the second excitation magnet 60 in all the excitation slots 35b, the number of the first excitation magnet 70 and the second excitation magnet 60 can be reduced. The magnetic permeability of the first excitation magnet 70 and the second excitation magnet 60 can be increased. This, in turn, improves the demagnetization resistance of the first excitation magnet 70 and the second excitation magnet 60.

[0398] In the rotary electric machine device 1 of the fifth embodiment, the first excitation magnet 70 is arranged radially outward from the excitation winding 50 in the first excitation slot 35c. This structure allows the first excitation magnet 70 to be located away from the rotor 10. This makes it less prone to demagnetization of the first excitation magnet 70.

[0399] When the first excitation magnet 70 is positioned radially outward from the excitation winding 50 in the first excitation slot 35c, if an excitation current i50 is supplied to the excitation winding 50 during rotation control, the excitation flux M50 generated by the energization of the excitation winding 50 will pass through the first excitation magnet 70 in the positive direction. Since the magnetization direction of the first excitation magnet 70 is positive, the direction in which the excitation flux M50 passes through the first excitation magnet 70 is the same as the magnetization direction of the first excitation magnet 70, making it difficult for demagnetization of the first excitation magnet 70 caused by the excitation flux M50 to occur.

[0400] In the rotating electric machine device 1 of the fifth embodiment, the second excitation magnet 60 is arranged radially inward from the excitation winding 50 in the second excitation slot 35d. With this structure, compared to arranging the second excitation magnet 60 radially outward from the excitation winding 50, the second excitation magnet 60 can be positioned closer to the rotor 10. This mitigates magnetic saturation at the radially inward end of the tooth 32, allowing more magnetic flux to pass through. Consequently, the magnetic flux of the second excitation magnet 60 easily links with the rotor 10, thus effectively utilizing the magnetic flux of the second excitation magnet 60 and resulting in good torque characteristics for the rotating electric machine 2.

[0401] It should be noted that the description of the fifth embodiment uses the case where the first excitation slot 35c and the second excitation slot 35d are adjacent to each other with an armature slot 35a in between as an example, but it is not limited to this. For example, the two first excitation slots 35c may be adjacent to each other with an armature slot 35a in between, or the two second excitation slots 35d may be adjacent to each other with an armature slot 35a in between.

[0402] In the fifth embodiment, the magnetomotive force of the excitation winding 50 housed in the first excitation slot 35c can be the same as or different from that of the excitation winding 50 housed in the second excitation slot 35d. For example, the number of turns of the excitation winding 50 housed in the first excitation slot 35c can be the same as or different from that of the excitation winding 50 housed in the second excitation slot 35d.

[0403] (compressor)

[0404] Figure 24 The structure of compressor CC is illustrated. Compressor CC includes a rotary motor device 1, a housing CC1, and a compression mechanism CC2.

[0405] The housing CC1 houses the compression mechanism CC2 and the rotary motor 2. In this example, the housing CC1 is formed as a cylindrical shape extending vertically and closed at both ends. An intake pipe CC11 and an exhaust pipe CC12 are provided on the housing CC1. The intake pipe CC11 passes through the body of the housing CC1 and is connected to the compression mechanism CC2. The exhaust pipe CC12 passes through the upper part of the housing CC1 and communicates with the internal space of the housing CC1.

[0406] Compression mechanism CC2 compresses the fluid. In this example, compression mechanism CC2 is arranged below rotary motor 2. Compression mechanism CC2 compresses the fluid drawn in through suction pipe CC11 and ejects the compressed fluid into the internal space of housing CC1. The fluid ejected into the internal space of housing CC1 is ejected through ejection pipe CC12. In this example, compression mechanism CC2 is a rotary compression mechanism.

[0407] Shaft 4 connects the rotary motor 2 and the compression mechanism CC2. In this example, shaft 4 extends vertically. The rotary motor 2 drives shaft 4 to rotate. The compression mechanism CC2 operates under the rotational drive of shaft 4.

[0408] (Refrigeration unit)

[0409] Figure 25 The structure of the refrigeration unit RR is illustrated. The refrigeration unit RR includes a refrigerant circuit RR1 for refrigerant circulation. In this example, the refrigeration unit RR constitutes an air conditioner. Specifically, the refrigerant circuit RR1 includes: a compressor CC with a rotary motor device 1, a first heat exchanger RR5, a second heat exchanger RR6, an expansion mechanism RR7, and a four-way reversing valve RR8.

[0410] The compressor CC compresses the refrigerant and then sprays the compressed refrigerant out. The discharge side of the compressor CC is connected to the first port of the four-way reversing valve RR8. The suction side of the compressor CC is connected to the second port of the four-way reversing valve RR8.

[0411] The first heat exchanger RR5 facilitates heat exchange between the refrigerant and the air. The gas end of the first heat exchanger RR5 is connected to the third port of the four-way reversing valve RR8. The liquid end of the first heat exchanger RR5 is connected to the liquid end of the second heat exchanger RR6 via the expansion mechanism RR7. For example, the first heat exchanger RR5 is a heat source heat exchanger, and it is located outdoors.

[0412] The second heat exchanger RR6 facilitates heat exchange between the refrigerant and the air. The gas end of the second heat exchanger RR6 is connected to the fourth port of the four-way reversing valve RR8. For example, the second heat exchanger RR6 is installed indoors.

[0413] The expansion mechanism RR7 expands the refrigerant to reduce pressure. For example, the expansion mechanism RR7 is an electronic expansion valve.

[0414] The four-way directional valve RR8 can be in a first state where the first valve port is connected to the third valve port and the second valve port is connected to the fourth valve port. Figure 25 The state shown by solid lines), and the second state where the first valve port is connected to the fourth valve port and the second valve port is connected to the third valve port. Figure 25 Switching between states (shown by dashed lines).

[0415] With the four-way reversing valve RR8 in its first state, the refrigerant injected from the compressor CC releases heat in the first heat exchanger RR5, is depressurized in the expansion mechanism RR7, and then absorbs heat in the second heat exchanger RR6. The refrigerant flowing out of the second heat exchanger RR6 is then drawn into the compressor CC.

[0416] With the four-way reversing valve RR8 in its second state, the refrigerant injected from the compressor CC releases heat in the second heat exchanger RR6, and after being depressurized in the expansion mechanism RR7, absorbs heat in the first heat exchanger RR5. The refrigerant flowing out of the first heat exchanger RR5 is then drawn into the compressor CC.

[0417] (vehicle)

[0418] Figure 26 The structure of vehicle VV is illustrated. Vehicle VV includes a rotary motor 1, wheels VV1, and a power transmission mechanism VV2. The power transmission mechanism VV2 transmits the rotational force of the rotary motor 2 to the wheels VV1. Once the rotary motor 2 is driven to rotate, its rotational force is transmitted to the wheels VV1 through the power transmission mechanism VV2, thus driving the wheels VV1 to rotate.

[0419] (Other implementation methods)

[0420] It should be noted that, Figures 3 to 10 as well as Figures 13-20 The various magnetic flux flows shown are merely examples, and the various magnetic flux paths can vary depending on the rotational position of the rotor 10 (e.g., the position of the protrusion 13). However, even if the rotational position of the rotor 10 changes, various magnetic fluxes will still flow through the rotor 10 and act as excitation flux on the rotor 10.

[0421] In the above description, the rotary motor 2 is an internal rotor type motor. Therefore, the radially outer side is the side away from the rotor 10, and the radially inner side is the side closer to the rotor 10.

[0422] It should be noted that the above explanation uses the case where the rotating electric motor 2 is configured as an internal rotor type motor as an example, but it is not limited to this. For example, the rotating electric motor 2 can also be configured as an external rotor type motor.

[0423] In the above explanation, the case where the control unit 3 controls the rotary motor 2 based on the outputs of various sensors (not shown) that detect various parameters of the rotary motor 2 has been described as an example, but it is not limited to this. For example, the control unit 3 can also control the rotary motor 2 by operating it without sensors.

[0424] The above explanation uses the case where the rotary motor 2 is configured as an electric motor as an example, but the rotary motor 2 can also be configured as a generator.

[0425] The above description illustrates cases where the rotor core 11 and stator core 30 are composed of laminated cores, but this is not a limitation. For example, the rotor core 11 and stator core 30 may also be composed of dust cores containing insulation.

[0426] In the above description, the case where the through hole 15 of the insertion shaft 4 is provided at the center of the rotor core 11 is used as an example, but it is not limited to this. For example, the shaft 4 can also be mounted on end plates (not shown) provided at both ends of the rotor core 11 along its axial direction. In this case, the through hole 15 is not required.

[0427] The above description illustrates an example where the first excitation magnet 70 is arranged radially outward within the excitation slot 35b compared to the second excitation magnet 60, but this is not a limitation. For example, the first excitation magnet 70 could also be arranged radially inward within the excitation slot 35b compared to the second excitation magnet 60.

[0428] In the above description, the case where the winding housing 350, the first magnet housing 352, and the second magnet housing 351 are connected in the excitation slot 35b is used as an example, but it is not limited to this. For example, the winding housing 350, the first magnet housing 352, and the second magnet housing 351 may also be configured to be adjacent to each other with a thin-walled portion (not shown). In other words, the winding housing 350, the first magnet housing 352, and the second magnet housing 351 may also be independent slots, and the excitation slot 35b may be an assembly of these slots.

[0429] The above describes the embodiments and variations, but it is understood that various changes can be made to the embodiments and details without departing from the spirit and scope of the claims. Appropriate combinations or substitutions of the above embodiments and variations are also possible as long as the function of the object of this disclosure is not impaired.

[0430] -Industry Applicability-

[0431] In summary, this disclosure is useful as a rotary electric motor, compressor, refrigeration unit, and vehicle.

[0432] - Symbol Explanation -

[0433] 1 Rotary electric motor device

[0434] 2 Rotary motor

[0435] 3. Control Department

[0436] 4-axis

[0437] 10 rotors

[0438] 20 stators

[0439] 30 stator core

[0440] 35 slots

[0441] 35a armature slot

[0442] 35b Excitation Slot

[0443] 350 Winding Storage Section

[0444] 351 Second Magnet Storage Section

[0445] 352 First Magnet Storage Section

[0446] 40 Armature winding

[0447] 50 Excitation winding

[0448] 70 First Excitation Magnet

[0449] 60 Second excitation magnet

Claims

1. A rotary electric machine characterized by comprising: The rotating electric machine includes a rotor (10) and a stator (20) opposed to the rotor (10) with a prescribed gap (G) therebetween, The stator (20) has a stator core (30), an armature winding (40), an excitation winding (50), a first excitation magnet (70), and a second excitation magnet (60), The stator core (30) is formed in a substantially circular ring shape and is provided with armature slots (35a) and excitation slots (35b) alternately arranged in the circumferential direction, The armature winding (40) is housed in the armature slots (35a), and the excitation winding (50), the first excitation magnet (70), and the second excitation magnet (60) are housed in the excitation slots (35b), The armature winding (40) generates a rotating magnetic field that rotates the rotor (10) by being supplied with an armature current (i40) that is alternating current, The excitation winding (50) generates excitation magnetic flux (M50) by being supplied with an excitation current (i50) that is direct current, The first excitation magnet (70) is capable of changing the magnitude and orientation of the magnetic force of the first excitation magnet (70) using the excitation magnetic flux (M50), The second excitation magnet (60) is arranged in magnetic parallel with the first excitation magnet (70) and has a pole face that extends in the circumferential direction, The product of the residual magnetic flux density of the second excitation magnet (60) and the pole area of the second excitation magnet (60) is greater than the product of the residual magnetic flux density of the first excitation magnet (70) and the pole area of the first excitation magnet (70).

2. The rotating electric machine according to claim 1, characterized in that: In a temperature range in which the rotating electric machine is used, the maximum value of the coercive force of the first excitation magnet (70) is less than the minimum value of the coercive force of the second excitation magnet (60).

3. The rotating electric machine according to claim 1 or 2, characterized in that: The first excitation magnet (70) is arranged on a side of the excitation slot (35b) that is farther from the rotor (10) than the second excitation magnet (60).

4. The rotating electric machine according to claim 3, characterized in that: The excitation winding (50) is arranged on a side of the excitation slot (35b) that is farther from the rotor (10) than the first excitation magnet (70).

5. The rotating electric machine according to claim 4, characterized in that: The circumferential length (LC70) of the first excitation magnet (70) is less than the circumferential length (LC60) of the portion of the second excitation magnet (60) that is farther from the rotor (10), and the circumferential length (LC70) of the first excitation magnet (70) is less than the circumferential length (LC350) of the portion of the winding housing portion (350) of the excitation slot (35b) that houses the excitation winding (50) that is closer to the rotor (10).

6. The rotating electric machine according to claim 3, characterized in that: The excitation winding (50) is arranged on a side of the excitation slot (35b) that is farther from the rotor (10) than the second excitation magnet (60), The first field magnet (70) is disposed in the field slot (35b) on a side farther from the rotor (10) than the field winding (50).

7. The rotary electric machine according to claim 6, characterized in that: The circumferential length (LC70) of the first field magnet (70) is shorter than the circumferential length (LC350) of a portion of a winding receiving portion (350) in the field slot (35b) for receiving the field winding (50) on a side farther from the rotor (10).

8. The rotary electric machine according to claim 3, characterized in that: The field winding (50) is disposed in the field slot (35b) on a side farther from the rotor (10) than the second field magnet (60), The first field magnet (70) is not sandwiched between the field windings (50) in the field slot (35b), but is disposed on at least one of the circumferential sides of the field windings (50) and is radially magnetized.

9. The rotary electric machine according to claim 1, characterized in that: The field slot (35b) includes a first field slot (35c) for receiving the field winding (50) and the first field magnet (70), and a second field slot (35d) for receiving the field winding (50) and the second field magnet (60).

10. The rotary electric machine according to claim 9, characterized in that: The first field slot (35c) and the second field slot (35d) are adjacent across the armature slot (35a).

11. The rotary electric machine according to claim 9 or 10, characterized in that: In the first field slot (35c), the first field magnet (70) is disposed on a side farther from the rotor (10) than the field winding (50), In the second field slot (35d), the second field magnet (60) is disposed on a side closer to the rotor (10) than the field winding (50).

12. A compressor characterized by: The compressor includes the rotary electric machine according to any one of claims 1 to 11.

13. A refrigeration apparatus characterized by comprising: The refrigerating apparatus includes the compressor according to claim 12.

14. A vehicle characterized by: The vehicle includes the rotary electric machine according to any one of claims 1 to 11.

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