Winding-field type rotary electric machine

Abstract

The winding-excited type rotating electric machine (40) includes: a stator (50) having a stator winding (52); a rotor (60) having a rotor core (61) and an excitation winding (70); and a circuit module (102) configured to rotate integrally with the rotor and having electrical components connected to the excitation winding. The rotor has a first circuit module (141) disposed on the side of a first rotor end (X1) which is the axial side of the rotor core, and a second circuit module (142) disposed on the side of a second rotor end (X2) which is the axial side of the rotor core.

Description

[0001] Cross-reference of related applications

[0002] This application is based on Japanese Application No. 2024-005114, filed on January 17, 2024, the contents of which are incorporated herein by reference. Technical Field

[0003] The disclosure in this specification pertains to winding-excited rotary motors. Background Technology

[0004] In a wound-excitation type rotating electric motor, the rotor has a rotor core and an excitation winding. The rotor core has multiple main pole portions (magnetically salient pole portions) arranged circumferentially, and the excitation winding is wound around the main pole portions. Furthermore, it is known that a circuit module incorporating capacitors and diodes as electrical components is provided on one of the axial sides of the rotor (see Patent Document 1). In the circuit module, capacitors, etc., are held by component holders.

[0005] Existing technical documents

[0006] Patent documents

[0007] Patent Document 1: Japanese Patent Application Publication No. 2020-124100

[0008] In the rotor with the above structure, a circuit module is positioned on one axial side of the rotor. Therefore, when the electrical components in the circuit module generate heat upon energization, the heat concentrates on that single axial side of the rotor. For example, as the number of electrical components in the circuit module increases, the thermal deviation becomes significant. In this case, there is a concern that the circuit module and its vicinity in the rotor may locally become excessively hot. Summary of the Invention

[0009] This disclosure is made in view of the above circumstances, with the aim of providing a winding-excited type rotating electric motor capable of suppressing the condition of excessively high temperature in the rotor.

[0010] This disclosure relates to a winding-excited type rotary electric motor, which has the following features:

[0011] Stator, which has stator windings;

[0012] A rotor having a rotor core and an excitation winding wound around the rotor core; and

[0013] A circuit module, configured to rotate integrally with the rotor and having electrical components connected to the excitation winding,

[0014] The rotor has a first circuit module and a second circuit module as the circuit module. The first circuit module is disposed on a first rotor end side, which is one axial side of the rotor core, and the second circuit module is disposed on a second rotor end side, which is the other axial side of the rotor core.

[0015] In a wound-excitation type rotating electric motor, the circuit module, which comprises electrical components connected to the excitation winding, is configured with a first circuit module and a second circuit module. The first circuit module is located on the first rotor end side, which is one axial side of the rotor core, and the second circuit module is located on the second rotor end side, which is the other axial side of the rotor core. Therefore, when the electrical components in the circuit module generate heat upon energization, the heat is dispersed to both axial sides of the rotor. As a result, overheating in the rotor can be suppressed. Attached Figure Description

[0016] The foregoing and other objects, features, and advantages of this disclosure will become more apparent from the following detailed description with reference to the accompanying drawings, which are shown below.

[0017] Figure 1 This is an overall structural diagram of the control system for a rotating electric machine.

[0018] Figure 2 This is a diagram showing the inverter and its surrounding structure.

[0019] Figure 3 This is a cross-sectional view of the rotor and stator.

[0020] Figure 4 This is a diagram showing the circuitry of the rotor.

[0021] Figure 5 This is an exploded 3D view of the rotor.

[0022] Figure 6 It is a perspective view showing the winding unit decomposed in the main part of the rotor.

[0023] Figure 7 This is a cross-sectional view of the main rotor section.

[0024] Figure 8 This is a schematic diagram showing the structure of a longitudinal section of a rotary electric machine.

[0025] Figure 9 This is a cross-sectional view of the main rotor section.

[0026] Figure 10 It is a diagram showing the electrical connection status of each coil module and each circuit module of the winding unit.

[0027] Figure 11 This is a diagram used to illustrate the cooling structure in a rotating electric machine.

[0028] Figure 12 This is a cross-sectional view of the main rotor section.

[0029] Figure 13 It is a diagram showing the electrical connection status of each coil module and each circuit module of the winding unit.

[0030] Figure 14 This is a cross-sectional view of the main rotor section.

[0031] Figure 15 It is a diagram showing the electrical connection status of each coil module and each circuit module of the winding unit.

[0032] Figure 16 It is a diagram showing the electrical connection status of each coil module and each circuit module of the winding unit.

[0033] Figure 17 It is a diagram showing the electrical connection status of each coil module and each circuit module of the winding unit.

[0034] Figure 18 It is a diagram showing the electrical connection status of each coil module and each circuit module of the winding unit.

[0035] Figure 19 This is a diagram showing the circuitry of the rotor.

[0036] Figure 20 This is a diagram showing the circuitry of the rotor. Detailed Implementation

[0037] Hereinafter, embodiments of the winding-excited type rotary electric motor relating to this disclosure will be described with reference to the accompanying drawings. Rotary electric motors are used as a power source for propulsion in electric vehicles, such as electric cars and hybrid electric vehicles.

[0038] First, use Figure 1 The control system for the rotating electric motor is described below. The control system includes a DC power supply 10, an inverter 20, a control device 30, and a rotating electric motor 40. The rotating electric motor 40 is a self-excited winding type synchronous machine. For example, the rotating electric motor 40, the inverter 20, and the control device 30 can be a mechatronic drive unit, or they can be composed of individual components.

[0039] The rotary motor 40 includes: a housing 41; and a stator 50 and a rotor 60 housed within the housing 41. The rotary motor 40 of this embodiment is an inner rotor type rotary motor in which the rotor 60 is arranged radially inside the stator 50.

[0040] The stator 50 includes a stator core 51 and a stator winding 52. The stator winding 52 is made of copper wire, for example, and includes U, V, and W phase windings 52U, 52V, and 52W arranged with electrical angles offset from each other by 120°.

[0041] The rotor 60 includes a rotor core 61 and an excitation winding 70. The excitation winding 70 can be made of, for example, aluminum wire, which is lightweight and easy to form. Furthermore, the excitation winding 70 is not limited to aluminum wire; it can also be made of copper wire or CNTs (carbon nanotubes), for example. A rotating shaft 32 is assembled in the central hole of the rotor core 61. The rotating shaft 32 is rotatably supported on the housing 41 by bearings 42 and 43.

[0042] like Figure 2 As shown, the inverter 20 includes a series connection of the upper arm switches SUP, SVP, SWP for phases U, V, and W, and the lower arm switches SUn, SVn, SWn for phases U, V, and W. In each phase, the first terminals of the phase windings 52U, 52V, and 52W are connected at the connection points of the upper arm switches SUP, SVP, SWp and the lower arm switches SUn, SVn, SWn. The second terminals of the phase windings 52U, 52V, and 52W are connected at the neutral point. That is, in this embodiment, the stator winding 52 is star-connected. However, the stator winding 52 can also be delta-connected. In this embodiment, each switch SUP to SWn is, for example, an IGBT. A freewheeling diode is connected in reverse parallel to each switch SUP to SWn.

[0043] The collectors of the upper arm switches SUP, SVP, and SWP of each phase are connected to the positive terminal of the DC power supply 10. The emitters of the lower arm switches SUn, SVn, and SWn of each phase are connected to the negative terminal of the DC power supply 10. A smoothing capacitor 11 is connected in parallel with the DC power supply 10.

[0044] Next, use Figure 3 The stator 50 and rotor 60 are described below.

[0045] The stator 50 and rotor 60 are both arranged coaxially with the rotating shaft 32. In the following description, the direction in which the rotating shaft 32 extends is defined as axial, the direction in which it extends radially from the center of the rotating shaft 32 is defined as radial, and the direction in which it extends circumferentially around the rotating shaft 32 is defined as circumferential.

[0046] The stator core 51 is constructed from a laminated steel plate made of a soft magnetic material and has: an annular magnetic yoke 51a; and a plurality of teeth 51b protruding radially inward from the magnetic yoke 51a. A plurality of slots 54 are formed between adjacent teeth 51b arranged circumferentially. The stator winding 52 is constructed by accommodating the phase windings of each phase in these slots 54 in a predetermined order. For example, in the stator 50, a segmented coil construction using multiple conductor segments can be employed. However, the construction of the stator winding 52 is arbitrary.

[0047] The rotor core 61 is made of a soft magnetic material, such as laminated steel plates. The rotor core 61 has a cylindrical portion 61a and a plurality of main pole portions 62 protruding radially outward from the cylindrical portion 61a. An excitation winding 70 is wound around the main pole portions 62 in a concentrated manner. In this embodiment, eight main pole portions 62 are arranged at equal intervals along the circumference.

[0048] The excitation winding 70 includes a first winding portion 71 and a second winding portion 72. In each main pole portion 62, the first winding portion 71 is wound radially outward, and the second winding portion 72 is wound radially inward. In each main pole portion 62, the winding directions of the first winding portion 71 and the second winding portion 72 are the same. Furthermore, in adjacent main pole portions 62 in the circumferential direction, the winding directions of the winding portions 71 and 72 wound on one side are opposite to those of the winding portions 71 and 72 wound on the other side. Therefore, adjacent main pole portions 62 in the circumferential direction have opposite magnetization directions. In the rotor 60, multiple magnetic poles (magnetic field poles) arranged circumferentially are formed by the main pole portions 62 in the rotor core 61 and the excitation winding 70 wound around these main pole portions 62.

[0049] Figure 4 This diagram shows the circuitry on the rotor 60 side, which includes a first winding section 71 and a second winding section 72. The first winding section 71 and the second winding section 72 are connected in series via a second end 71b of the first winding section 71 and a first end 72a of the second winding section 72. A diode 91 and a capacitor 92 are connected in parallel to the second winding section 72 at the second end 71b of the first winding section 71. Furthermore, a diode 93 and a capacitor 94 are connected in series to the series connection of the first winding section 71 and the second winding section 72. In the following description, the diode 91 and the capacitor 92 connected in parallel to the second winding section 72 will be referred to as parallel diode 91 and parallel capacitor 92, respectively. Similarly, the diode 93 and the capacitor 94 connected in series to the series connection of the first winding section 71 and the second winding section 72 will be referred to as series diode 93 and series capacitor 94, respectively. The capacitors 92 and 94 are, for example, ceramic capacitors or film capacitors.

[0050] The cathode of the parallel diode 91 is connected to the first end 72a of the second winding section 72, and the anode of the parallel diode 91 is connected to the second end 72b of the second winding section 72. Therefore, in the closed circuit including the second winding section 72 and the parallel diode 91, the current flows in one direction from the anode side to the cathode side of the parallel diode 91. Furthermore, the cathode of the series diode 93 is connected to the first end 71a of the first winding section 71, and the anode of the series diode 93 is connected to the second end 72b of the second winding section 72. This rectifies the excitation current flowing through each winding section 71, 72. In this embodiment, the second winding section 72 has more turns than the first winding section 71.

[0051] return Figure 2 As explained, the control device 30 is an electronic control unit (Electronic Control Unit) primarily composed of a microcomputer 31. The microcomputer 31 includes a CPU (Central Processing Unit). The functions provided by the microcomputer 31 can be provided through software stored in a physical storage device and a computer executing it, software only, hardware only, or a combination thereof. For example, when the microcomputer 31 is provided as hardware electronic circuitry, it can be provided through digital circuitry or analog circuitry containing multiple logic circuits. For example, the microcomputer 31 executes a program stored in a non-transitory physical storage medium, which is its own storage unit. The program includes a program for controlling the rotary motor 40. By executing the set of instructions constituting the program, the method corresponding to the program is executed. The storage unit is, for example, non-volatile memory. Furthermore, the program stored in the storage unit can be updated via communication networks such as OTA (Over-The-Air) or the Internet.

[0052] The control device 30 generates drive signals to turn on / off each of the switches Sup to SWn constituting the inverter 20. Specifically, in order to convert the DC power output from the DC power supply 10 into AC power and supply it to the U, V, and W phase windings 52U, 52V, and 52W, the control device 30 generates drive signals to turn on / off each of the switches Sup to SWn and supplies the generated drive signals to the gates of each switch Sup to SWn. Thus, in each phase, the upper arm switch and the lower arm switch are alternately turned on with a dead time interval.

[0053] The control device 30 switches Sup to SWn on / off by causing a combined current of the fundamental current and a high-frequency current (specifically, a high-frequency excitation current) with a higher frequency than the fundamental current to flow through each phase winding 52U, 52V, and 52W. The fundamental current is the current that primarily generates torque in the rotating motor 40. The high-frequency current is the current that primarily excites the first winding section 71 and the second winding section 72 constituting the excitation winding 70 and induces an excitation current in the excitation winding 70. The phase currents flowing through each phase winding 52U, 52V, and 52W are electrically offset by 120°.

[0054] In addition, the high-frequency current flowing through the stator winding 52 can be a harmonic current with a frequency that is N times the frequency of the fundamental current (N is an integer greater than 2), or a current with a frequency that is N times the frequency of the fundamental current.

[0055] When a high-frequency current flows through the stator winding 52, voltages are induced in the first winding section 71 and the second winding section 72, and excitation current flows through them. The induced voltages in the first winding section 71 and the second winding section 72 are, for example, in phase. The currents IL1 and IL2 flowing through the first winding section 71 and the second winding section 72 contain frequency components of the high-frequency current.

[0056] exist Figure 4 In the circuit shown, when the stator winding 52 is energized and the first winding 71 and the second winding 72 are energized, current flows from the first winding 71 to the second winding 72. Furthermore, when the voltage across the second winding 72 exceeds the forward voltage of the parallel diode 91, a current IL2, larger than the current IL1 flowing through the first winding 71, flows through the second winding 72 in the closed loop containing the second winding 72 and the parallel diode 91. By allowing current to flow through the closed loop containing the second winding 72 and the parallel diode 91, the DC component of the excitation current can be increased. This increases the DC component of the magnetic flux of the rotor 60 and increases the torque of the rotary motor 40.

[0057] Furthermore, when current flows through the closed loop comprising the second winding 72 and the parallel diode 91, a portion of this current flows through the first winding 71. In this case, the direction of the current IL1 flowing through the first winding 71 and the direction of the current IL2 flowing through the second winding 72 are opposite to each other. As a result, the pulsation of the excitation current, which is the sum of the currents IL1 and IL2, is reduced, thereby reducing the torque pulsation of the rotary motor 40.

[0058] Next, the structure of rotor 60 will be described in more detail. Figure 5 This is an exploded perspective view of rotor 60. Additionally, Figure 6 This is a perspective view showing the winding unit 110 exploded within the rotor main section 101. Figure 7 This is a cross-sectional view showing a portion of the rotor main section 101.

[0059] The rotor 60 has a rotor main section 101 and a circuit module 102 disposed at one end of one of the axial sides of the rotor main section 101. The rotor main section 101 is like... Figure 3 As described, the rotor core 61 and excitation winding 70 are included, and a rotating shaft 32 is assembled in the central hole of the rotor core 61. The excitation winding 70 is composed of a plurality of winding units 110 arranged circumferentially. The circuit module 102 is fixed to the rotating shaft 32 with the rotating shaft 32 inserted through the hollow portion. The circuit module 102 is positioned in the excitation winding 70 at an axially opposite position to the coil end that is axially outer of the rotor core 61. The circuit module 102 is equivalent to a "circuit module".

[0060] The rotor main section 101 has a plurality of winding units 110 provided at each magnetic pole of the rotor 60. Each winding unit 110 is formed in a ring shape with the axial direction as its long side, and is assembled to the rotor core 61 with the main pole section 62 of the rotor core 61 inserted through its hollow portion. In this embodiment, the winding units 110 constitute a "pole coil".

[0061] The winding unit 110 includes a first coil module 111 that is radially outward when mounted on the main pole portion 62, and a second coil module 112 that is radially inward. The first coil module 111 is a coil module corresponding to the first winding portion 71, and the second coil module 112 is a coil module corresponding to the second winding portion 72.

[0062] The first coil module 111 includes: a ring-shaped coil body 121 formed by multiple windings of wires composed of flat angled wires in the circumferential and radial directions; and a thin plate-shaped insulator 122 integrally disposed on the coil body 121. The insulator 122 has: an outer peripheral portion extending circumferentially and covering the radially outer and inner sides of the coil body 121; and a portion extending radially and covering the hollow portion of the coil body 121. That is, in the coil body 121, the radially outer outer peripheral portion, the radially inner inner peripheral portion, and the hollow portion are insulated and covered by the insulator 122.

[0063] The second coil module 112 includes: a ring-shaped coil body 123 formed by multiple windings of flat angle wires in the circumferential and radial directions; and a thin plate-shaped insulator 124 integrally disposed on the coil body 123. The insulator 124 has: an outer peripheral portion extending circumferentially and covering the radially outer and inner sides of the coil body 123; and a portion extending radially and covering the hollow portion of the coil body 123. That is, in the coil body 123, the radially outer outer peripheral portion, the radially inner inner peripheral portion, and the hollow portion are insulated and covered by the insulator 124.

[0064] Coil bodies 121 and 123 are, for example, air-core coils configured as α-wound coils. Furthermore, the flat corner wires used for coil bodies 121 and 123 have a generally rectangular cross-sectional shape (specifically, a generally elongated shape), and consist of a conductor portion made of aluminum or the like, and an insulating layer covering the conductor portion. However, round wires with a circular cross-section can also be used as the conductor material.

[0065] like Figure 7 As shown, in the first coil module 111, the wire is wound into two layers radially, and in the second coil module 112, the wire is wound into six layers radially. Furthermore, the number of circumferential turns (in other words, the number of circumferential wire arrangements) differs in each coil module 111 and 112; the number of turns on the radially outer side is greater than that on the radially inner side. This improves the occupancy rate of the excitation winding 70. Moreover, if occupancy rate is not considered, the number of circumferential turns in each radially arranged coil body 121 and 123 can be set to be the same.

[0066] Furthermore, in the rotor main section 101, with the first coil module 111 and the second coil module 112 assembled to each of the main pole sections 62, retaining plates 125 and 126 are provided between each other on the main pole sections 62 of the rotor core 61 to maintain the assembly state of these coil modules 111 and 112. The retaining plate 125 is installed radially outside the first coil module 111, and the retaining plate 126 is installed between the first coil module 111 and the second coil module 112.

[0067] like Figure 6 As shown, in each magnetic pole winding unit 110, two wire ends 127 are led out axially from the first coil module 111, and six wire ends 128 are led out axially from the second coil module 112. Furthermore, in each circumferentially arranged winding unit 110, the wire ends 127 and 128 are joined together by welding or the like, thereby connecting multiple first coil modules 111 provided in each main pole portion 62 in series, and connecting multiple second coil modules 112 provided in each main pole portion 62 in series.

[0068] Furthermore, the structure connecting the windings (coil modules 111, 112) of each main pole 62 arranged circumferentially can also be a structure other than the structure described above where the wire ends 127, 128 of each coil module 111, 112 are joined to each other by welding or the like. For example, it can also be a structure in which the wire is continuously wound around the multiple main poles 62 in a manner that spans the multiple main poles 62 (a continuously wound structure).

[0069] exist Figure 5In the circuit module 102, there is a component holder 130 made of an electrically insulating material. Specifically, the component holder 130 is a resin molded body made of resin material. The component holder 130 is generally disc-shaped with a central hole 131 at its center. The component holder 130 is assembled to the rotating shaft 32 with the rotating shaft 32 inserted through the central hole 131.

[0070] In the component holder 130, an electrical component E consisting of diodes 91 and 93 and capacitors 92 and 94 is held in a manner surrounding the central hole 131. These electrical components E are electrically connected via a busbar (not shown). Furthermore, in the component holder 130, the winding ends that form the two ends of the first winding section 71, which is composed of multiple first coil modules 111, and the winding ends that form the two ends of the second winding section 72, which is composed of multiple second coil modules 112, are electrically connected to a circuit consisting of diodes 91 and 93 and capacitors 92 and 94 (see reference). Figure 4 ).

[0071] However, in the structure where the circuit module 102 is arranged on one side of the rotor 60 along the axial direction, when the electrical components E in the circuit module 102 generate heat when energized, the heat is concentrated on one side of the rotor 60 along the axial direction. For example, if the number of electrical components E in the circuit module 102 increases, the thermal deviation becomes significant. In this case, there is a concern that the circuit module 102 in the rotor 60 may locally become overheated.

[0072] Therefore, in this embodiment, as Figure 8 As shown, the structure is as follows: a first loop module 141 and a second loop module 142 are provided as loop module 102. The first loop module 141 is configured on the first rotor end X1 side, which is one axial side of the rotor core 61 (left side of the figure), and the second loop module 142 is configured on the second rotor end X2 side, which is the other axial side of the rotor core 61 (right side of the figure).

[0073] The first circuit module 141 and the second circuit module 142 respectively have Figure 4 The circuit shown. The circuit of the first circuit module 141 is electrically connected to half of the winding units 110 of the plurality of winding units 110 via the winding end Y on the first rotor end X1 side. Additionally, the circuit of the second circuit module 142 is electrically connected to the remaining half of the winding units 110 of the plurality of winding units 110 via the winding end Y on the second rotor end X2 side. The winding end Y on the first rotor end X1 side and the winding end Y on the second rotor end X2 side are... Figure 4 The first end 71a and the second end 71b of the first winding portion 71 and the first end 72a and the second end 72b of the second winding portion 72 are respectively.

[0074] In the rotary motor 40, each circuit module 141, 142 may be arranged on both axial sides of the stator winding 52 in a hollow space surrounded by the coil ends SE1, SE2 of the stator winding 52. That is, the portion of the stator winding 52 that is axially outer than the axial end face of the stator core 51 is the coil end SE1, SE2, which serves as the stator coil end. Furthermore, on one axial end side (the first rotor end X1 side) and the other axial end side (the second rotor end X2 side), each circuit module 141, 142 is arranged on the inner circumference of the annularly connected coil ends SE1, SE2.

[0075] As described above, the multiple winding units 110 are divided into two halves, and each half of the winding unit 110 is electrically connected to the respective circuit modules 141 and 142 on both sides of the axial direction. The specific structure is described below.

[0076] Figure 9 This is a cross-sectional view of the main rotor section. Figure 9 The image shows eight main pole sections 62 arranged circumferentially and winding units 110 wound around each main pole section 62. Additionally, in... Figure 9 In the diagram, four winding units 110 connected to the first circuit module 141 are enclosed by solid lines and are designated as "winding units 110A". The remaining four winding units 110 connected to the second circuit module 142 are enclosed by dashed lines and are designated as "winding units 110B".

[0077] Here, if the four winding units 110A connected to the first circuit module 141 are designated as the "first coil group," and the four winding units 110B connected to the second circuit module 142 are designated as the "second coil group," then the winding units 110A included in the first coil group and the winding units 110B included in the second coil group are arranged alternately one by one in the circumferential direction. In this embodiment, the winding directions of the wires in adjacent winding units 110 in the circumferential direction are opposite to each other. Therefore, the winding directions of each winding unit 110A included in the first coil group are the same, and the winding directions of each winding unit 110B included in the second coil group are the same. In addition, the winding directions of each winding unit 110A included in the first coil group are opposite to the winding directions of each winding unit 110B included in the second coil group.

[0078] Figure 10 This is a diagram showing the electrical connection status of the first coil module 111 and the second coil module 112 of each winding unit 110 with the first circuit module 141 and the second circuit module 142.

[0079] exist Figure 10The diagram shows eight first coil modules 111 constituting the first winding section 71 and eight second coil modules 112 constituting the second winding section 72 arranged in a left-right direction. Furthermore, the upper side of the diagram is designated as the first rotor end X1 side, and the lower side as the second rotor end X2 side, with the first circuit module 141 positioned on the first rotor end X1 side and the second circuit module 142 positioned on the second rotor end X2 side. Additionally, coil modules 111 and 112 included in the first coil group are designated as "coil modules 111A and 112A," and coil modules 111 and 112 included in the second coil group are designated as "coil modules 111B and 112B." To distinguish them, coil modules 111A and 112A are given cross-sectional lines.

[0080] exist Figure 10 In this configuration, four coil modules 111A and 112A, each contained in the first coil group, are electrically connected to the first circuit module 141 on the X1 side of the first rotor end. Additionally, four coil modules 111B and 112B, each contained in the second coil group, are electrically connected to the second circuit module 142 on the X2 side of the second rotor end. Each circuit module 141 and 142 is connected to... Figure 4 Similarly, the circuit, consisting of diodes 91 and 93 and capacitors 92 and 94, is capable of rectifying the excitation current separately. However, in each loop module 141 and 142, the capacitor capacity can be determined based on the number of winding units 110 of each coil group, and the capacitor capacity is only about half that of the structure where eight winding units 110 are electrically connected to one loop module 102.

[0081] In each of the four coil modules 111A and 112A included in the first coil group, the wire ends of each coil module 111A and 112A are led out towards the first rotor end X1, and the wire ends are connected to each other. In addition, on the first rotor end X1 side, the winding ends of the first coil module 111A, which becomes the two ends of the first winding section 71, and the winding ends of the second coil module 112A, which becomes the two ends of the second winding section 72, are respectively connected to the circuit of the first circuit module 141 as shown in the figure.

[0082] In each of the four coil modules 111B and 112B included in the second coil group, the wire ends of each coil module 111B and 112B are led out towards the second rotor end X2 side, and the wire ends are connected to each other. In addition, on the second rotor end X2 side, the winding ends of the first coil module 111B, which becomes both ends of the first winding section 71, and the winding ends of the second coil module 112B, which becomes both ends of the second winding section 72, are respectively connected to the circuit of the second circuit module 142 as shown in the figure.

[0083] In addition, such as Figure 9 and Figure 10 Thus, the structure in which winding units 110A of the first coil group and winding units 110B of the second coil group are alternately arranged one by one in the circumferential direction in each main pole portion 62 of the rotor core 61 can be achieved by providing four or more and an even number of main pole portions 62 in the rotor core 61. Therefore, the number of main pole portions 62 provided in the rotor core 61 can also be four, six, ten, twelve, fourteen, sixteen, etc., other than the eight mentioned above.

[0084] according to Figure 10 In this structure, when the stator winding 52 is energized, the high-frequency current flowing through the stator winding 52 causes the excitation current to flow through the circuits of each circuit module 141, 142, and through each coil module 111A, 112A (winding unit 110A) included in the first coil group and each coil module 111B, 112B (winding unit 110B) included in the second coil group. In this case, each coil group can generate excitation flux independently. Therefore, the excitation winding 70 can be redundantly energized in the rotor 60.

[0085] Here, each circuit module 141, 142 can be configured such that, when the stator winding 52 is energized, an equal amount of excitation current flows through the coil modules 111, 112 of each coil group. In this case, compared to the case where eight coil modules 111, 112 are connected in series, the inductance of the coil modules 111, 112 of each coil group is approximately half, but the excitation current generated in each coil group is equal, thus generating an equal amount of excitation flux in the sum of the two coil groups. Compared to the case where eight coil modules 111, 112 are connected in series, the torque generated in each coil group is approximately half. Furthermore, compared to the case where eight coil modules 111, 112 are connected in series, the voltage generated in each coil group is slightly higher than half.

[0086] In addition, Figure 9 and Figure 10 In the structure, in the rotor 60, the coil modules 111A and 112A (winding unit 110A) of the first coil group and the coil modules 111B and 112B (winding unit 110B) of the second coil group are alternately arranged one by one in the circumferential direction among the main pole portions 62 arranged in the circumferential direction. Therefore, when the excitation winding 70 is redundantly energized using the two circuit modules 141 and 142, the excitation flux of each pole generated by the energization of the first circuit module 141 and the excitation flux of each pole generated by the energization of the second circuit module 142 are uniformly and finely distributed in the circumferential direction. In this case, depending on each coil group, it is possible to observe the position of a polygon that is half the total number of poles when viewed along the circumference of the rotor 60 (in Figure 9The excitation flux is generated in the position where the quadrilateral is formed.

[0087] Furthermore, even if one of the two circuit modules 141 and 142 malfunctions due to a fault, the excitation winding 70 can still be energized through the other circuit module, allowing the rotary motor 40 to continue rotating. That is, because the excitation winding 70 is divided into two independent systems, even if either of the circuit modules 141 or 142 fails, at least half the torque can be generated while the rotary motor 40 continues rotating.

[0088] In the structure where the circuit module 102 is divided into two circuit modules 141 and 142 as described above, the number of electrical components or the size of the electrical components can be reduced in each individual circuit module 141 and 142. Therefore, the size of each circuit module 141 and 142 becomes smaller. That is, the axial thickness dimension of each circuit module 141 and 142 is reduced. This enables the miniaturization of the rotary motor 40.

[0089] Furthermore, if the diodes 91 and 93 are oriented in opposite directions in either of the circuit modules 141 and 142, the direction of the excitation current in the winding unit 110 connected to that circuit module will also be opposite. Therefore, even in the excitation winding 70, which has a structure in which all circumferential windings are wound in the same direction, excitation fluxes of opposite polarities can be generated in each circumferentially adjacent main pole portion 62.

[0090] Furthermore, the rotary motor 40 in this embodiment has the following structure: each circuit module 141, 142, respectively disposed on both sides of the axial direction, is individually cooled. Figure 11 Explain the structure. Furthermore, in Figure 11 In the diagram, the left side is the first rotor end X1 side, and the right side is the second rotor end X2 side. In this structure, the rotary motor 40 has a first refrigerant supply section that supplies refrigerant to the first circuit module 141 and a second refrigerant supply section that supplies refrigerant to the second circuit module 142. Furthermore, it is configured to use refrigerant such as cooling water or cooling oil to cool each circuit module 141, 142.

[0091] In the housing 41 of the rotary motor 40, a refrigerant intake section, serving as a refrigerant intake unit, has inlet portions 151 and 152 respectively provided at both axial ends of the rotor 60 (i.e., the first rotor end X1 side and the second rotor end X2 side). Furthermore, in the housing 41, a refrigerant passage 153 is provided on the first rotor end X1 side to guide the refrigerant drawn in from the inlet portion 151 to the first circuit module 141, and a refrigerant passage 154 is provided on the second rotor end X2 side to guide the refrigerant drawn in from the inlet portion 152 to the second circuit module 142. In addition, the inlet portion 151 and the refrigerant passage 153 correspond to the "first refrigerant supply section," and the inlet portion 152 and the refrigerant passage 154 correspond to the "second refrigerant supply section."

[0092] Furthermore, in the housing 41, as a refrigerant discharge section, outlet sections 155 and 156 are respectively provided on both axial ends of the rotor 60 (i.e., the first rotor end X1 side and the second rotor end X2 side).

[0093] The refrigerant supply system for supplying refrigerant to the rotary motor 40 includes a circulation passage 161 for refrigerant circulation, and a circulation pump 162 and a heat dissipation unit 163 disposed in the circulation passage 161. The circulation pump 162 is, for example, an electric pump. The heat dissipation unit 163 is, for example, a radiator that releases heat from the refrigerant to the atmosphere. The refrigerant flows through the circulation passage 161 by driving the circulation pump 162.

[0094] When the rotary motor 40 is driven to rotate, the refrigerant flowing in from the circulation passage 161 is supplied to each loop module 141 and 142 through the refrigerant passages 153 and 154. As a result, each loop module 141 and 142 is cooled individually using refrigerant.

[0095] Furthermore, as a refrigerant supply system, it is also possible to construct a system structure in which different systems are built on the first loop module 141 side and the second loop module 142 side. In this case, refrigerant can be supplied to the first loop module 141 side and the second loop module 142 side via different circulation paths 161.

[0096] Based on the embodiment described in detail above, the following excellent effects are obtained.

[0097] The rotor 60 is configured such that a first circuit module 141 is positioned on the first rotor end X1 side, which is one axial side of the rotor core 61, and a second circuit module 142 is positioned on the second rotor end X2 side, which is the other axial side of the rotor core 61. Therefore, when the electrical components in each circuit module 141, 142 generate heat upon energization, the heat is dispersed to both axial sides of the rotor 60. In other words, the heat source is dispersed within the rotor 60. As a result, overheating within the rotor 60 can be suppressed.

[0098] The structure is configured as follows: half of the winding units 110A arranged circumferentially are designated as the first coil group, and the remaining half are designated as the second coil group. The winding ends of the first coil group are electrically connected to the electrical components of the first circuit module 141, and the winding ends of the second coil group are electrically connected to the electrical components of the second circuit module 142. In this configuration, the excitation current in the first coil group and the excitation current in the second coil group can be energized independently. This allows for redundant excitation of the excitation winding 70 in the rotor 60. Furthermore, the redundancy of the circuit improves fault tolerance.

[0099] The structure is configured as follows: in the winding unit 110A included in the first coil group, a wire end is led out to the first rotor end X1 side, and this wire end is electrically connected to the electrical components of the first circuit module 141; and in the winding unit 110B included in the second coil group, a wire end is led out to the second rotor end X2 side, and this wire end is electrically connected to the electrical components of the second circuit module 142. Thus, suitable electrical connections can be made respectively to the first rotor end X1 side and the second rotor end X2 side.

[0100] The structure is configured such that, in each main pole portion 62 of the rotor core 61 arranged circumferentially, winding units 110A of the first coil group and winding units 110B of the second coil group are alternately arranged circumferentially. In this case, when the excitation winding 70 is redundantly energized using the two circuit modules 141 and 142, the excitation flux of each pole generated by energizing the first circuit module 141 and the excitation flux of each pole generated by energizing the second circuit module 142 can be uniformly and finely distributed circumferentially. This reduces rotational vibration in the rotor 60.

[0101] The structure is configured such that the first circuit module 141 and the second circuit module 142 have diodes 91 and 93 and capacitors 92 and 94, and have circuits for rectifying the excitation current in the first and second coil groups when the stator winding 52 is energized. In this configuration, the same excitation current flows through each circuit module 141 and 142 in both the first and second coil groups. Therefore, even if either circuit module 141 or 142 fails, at least half the torque can still be generated.

[0102] The structure is designed to supply refrigerant to each loop module 141 and 142 separately. This improves the cooling effect of each loop module 141 and 142.

[0103] (Other implementation methods)

[0104] The above implementation method can also be modified as described below.

[0105] In rotor 60, the structure that distinguishes between the first coil group and the second coil group can also be configured as described below.

[0106] Can be set as Figure 12 and Figure 13 The structure shown. Figure 12 With the above Figure 9 Similarly, this is a cross-sectional view of the rotor main section 101. Figure 13 With the above Figure 10 Similarly, it is a diagram showing the electrical connection state of the first coil module 111 and the second coil module 112 of each winding unit 110 with the first circuit module 141 and the second circuit module 142.

[0107] exist Figure 12 In the structure shown, the winding unit 110A included in the first coil group and the winding unit 110B included in the second coil group are arranged alternately in pairs in the circumferential direction.

[0108] In addition, Figure 13 In this circuit, four coil modules 111A and 112A, each contained in the first coil group, are electrically connected to the first circuit module 141 on the X1 side of the first rotor end. Additionally, four coil modules 111B and 112B, each contained in the second coil group, are electrically connected to the second circuit module 142 on the X2 side of the second rotor end.

[0109] Furthermore, the structure in which the winding units 110A of the first coil group and the winding units 110B of the second coil group are alternately arranged in pairs in the circumferential direction in each main pole portion 62 of the rotor core 61 can be achieved by providing 4×n (n is an integer) main pole portions 62 in the rotor core 61. Therefore, the number of main pole portions 62 provided in the rotor core 61 can also be four, twelve, sixteen, etc., other than the eight mentioned above.

[0110] According to the above Figure 12 and Figure 13 The structure, when the excitation winding 70 is redundantly energized using two circuit modules 141 and 142, allows the excitation flux of each magnetic pole generated by the energization of the first circuit module 141 and the excitation flux of each magnetic pole generated by the energization of the second circuit module 142 to be uniformly distributed circumferentially. This reduces the rotational vibration of the rotor 60.

[0111] In addition, being able to become Figure 14 and Figure 15 The structure shown. Figure 14 With the above Figure 9 Similarly, this is a cross-sectional view of the rotor main section 101. Figure 15 With the above Figure 10 Similarly, it is a diagram showing the electrical connection state of the first coil module 111 and the second coil module 112 of each winding unit 110 with the first circuit module 141 and the second circuit module 142.

[0112] exist Figure 14 In the structure shown, the winding unit 110A included in the first coil group and the winding unit 110B included in the second coil group are divided into 1 / 2 of each other in the circumferential direction of the rotor core 61, and are respectively arranged on one side and the other side.

[0113] In addition, Figure 15 In this circuit, four coil modules 111A and 112A, each contained in the first coil group, are electrically connected to the first circuit module 141 on the X1 side of the first rotor end. Additionally, four coil modules 111B and 112B, each contained in the second coil group, are electrically connected to the second circuit module 142 on the X2 side of the second rotor end.

[0114] According to the above Figure 14 and Figure 15 Because the coil modules 111 and 112, which are contained in the same coil group, are arranged in a grouped manner, the length of the transition portion of the wire between each main pole 62 is shortened. Therefore, it is possible to reduce the winding resistance. In addition, if it is a continuously wound structure, the wire is continuously wound on each main pole 62 that are close to each other, so the winding operation can be considered to be easier.

[0115] In the above embodiments, the structure is configured as follows: the eight circumferentially arranged winding units 110 are divided into two coil groups, and the circuits of each loop module 141, 142 in each coil group are set with the same loop structure. However, the structure of the circuits of each loop module 141, 142 is not limited to this. Other structures will be described below.

[0116] Figures 16-18 This is a diagram showing the electrical connection status of the first coil module 111 and the second coil module 112 of each winding unit 110 with the first circuit module 141 and the second circuit module 142.

[0117] exist Figure 16 In this configuration, the circuit of the first circuit module 141 is connected to both ends of the second winding section 72 in the series connection between the first winding section 71 and the second winding section 72, forming a closed loop (first closed loop) that rectifies the current flowing through the second winding section 72 in one direction when the stator winding 52 is energized. Similarly, the circuit of the second circuit module 142 is connected to both ends of the series connection between the first winding section 71 and the second winding section 72, forming a closed loop (second closed loop) that rectifies the current flowing through the series connection in one direction when the stator winding 52 is energized. (As...) Figure 4 As described, the first closed loop has a parallel diode 91 and a parallel capacitor 92. The second closed loop has a series diode 93 and a series capacitor 94.

[0118] According to the above structure, in the first closed loop formed by connecting the two ends of the second winding section 72 and the second closed loop formed by connecting the two ends of the series connector of the first winding section 71 and the second winding section 72, it is easy to change the electrical components used in each closed loop individually, which can improve the design freedom.

[0119] In addition, Figure 16 In the structure, for example, one winding end of the second winding section 72 ( Figure 4 The second end 72b) is respectively connected to the respective loop modules 141 and 142 on both sides of the axial direction. In this case, an axial transition line extending in the axial direction may be connected to the winding end (second end 72b) of the second winding portion 72, and the first loop module 141 side and the second loop module 142 side may be connected through this axial transition line. Specifically, it may be, for example, in Figure 7 The retaining plate 125 or retaining plate 126 shown is provided with a groove-shaped or hole-shaped transition line insertion part extending axially, and is configured to connect the circuit modules 141 and 142 on both sides of the axial direction by inserting the axial transition line into the transition line insertion part. The winding end (first end 71a) of the first winding part 71 can also have the same structure.

[0120] exist Figure 16 Alternatively, it can replace the structure of the second winding section 72 that connects the first closed loop to the radially inner side, and be configured as the structure of the first winding section 71 that connects the first closed loop to the radially outer side.

[0121] exist Figure 17 In the structure, the circuit of the first loop module 141 has the function of constituting Figure 4 The diodes 91 and 93 in the diodes 91 and 93 and the capacitors 92 and 94 in the circuit shown. Additionally, the circuit of the second circuit module 142 has features constituting... Figure 4 The circuit shown includes diodes 91 and 93 and capacitors 92 and 94.

[0122] exist Figure 18 In the structure, the circuit of the first loop module 141 has the function of constituting Figure 4 The circuit shown includes diodes 91 and 93 and a portion of capacitor 92 and 94. Additionally, the circuit of the second circuit module 142 has features that constitute... Figure 4 The remaining capacitor 92 is one of the diodes 91 and 93 and capacitors 92 and 94 in the circuit shown.

[0123] The circuit on the rotor 60 side, which has a first winding section 71 and a second winding section 72, can also be configured as described below.

[0124] exist Figure 19 In the circuit shown, a parallel diode 91 and a parallel capacitor 92 are connected in parallel to the second winding section 72. Additionally, a parallel capacitor 95 is connected in parallel to the first winding section 71. A series diode 93 is connected in series with the series connection body of the first winding section 71 and the second winding section 72. When... Figure 4 The circuit comparison shown shows that... Figure 19 In, replacing Figure 4 The series capacitor 94 is provided, and a parallel capacitor 95 is provided in parallel with the first winding section 71.

[0125] exist Figure 20 In the circuit shown, a parallel capacitor 92 is connected in parallel to the second winding section 72. Additionally, a series diode 93 and a series capacitor 94 are connected in series to the series connectors of the first winding section 71 and the second winding section 72, respectively. When... Figure 4 The circuit comparison shown shows that... Figure 20 In the middle, it was set to be removed. Figure 4 The structure of the parallel diode 91.

[0126] Furthermore, the circuit on the rotor 60 side can also be configured as described above. Figure 4 , Figure 19 , Figure 20 Other structures. For example, the capacitors can be arranged in different positions where the diodes 91, 93 and the windings 71, 72 are connected in parallel or in series.

[0127] In each circuit module 141 and 142, the heat generated during energization differs due to the structure of the circuits within each module. For example, the heat generated by diode elements and capacitor elements during energization differs. Therefore, it is assumed that the heat generated when the excitation current flows through the excitation winding 70 during the energization of the stator winding 52 is different in each circuit module 141 and 142.

[0128] Considering this, the refrigerant supply amount per unit time of the first refrigerant supply section supplying refrigerant to the first loop module 141 and the second refrigerant supply section supplying refrigerant to the second loop module 142 can also be different; that is, the cooling capacity of each refrigerant supply section can also be different. In this case, the refrigerant supply amount per unit time of the loop module with the greater heat generation of the electrical components in each loop module 141, 142 can be increased. Thus, even if the heat generation of each loop module 141, 142 is different, each loop module 141, 142 can be appropriately cooled.

[0129] The excitation winding 70 is not limited to having a first winding section 71 and a second winding section 72. For example, the excitation winding 70 can be configured as follows: a structure in which the winding sections of each main pole section 62 are not connected in series as a first winding section 71 and a second winding section 72; a structure in which diodes are connected at both ends of the excitation winding 70; or a structure in which diodes and capacitors are connected in parallel.

[0130] That is, in the above embodiment, the pole coil of each magnetic pole is formed by a winding unit 110 consisting of two coil modules (first coil module 111 and second coil module 112) for each magnetic pole. However, this can be changed to form a structure in which the pole coil of each magnetic pole is formed by one coil module.

[0131] In stator 50, the stator core can also be a stator core without teeth.

[0132] As a rotary motor, it is not limited to a rotary motor used as an on-board unit; for example, it can also be a rotary motor used as an ISG (Integrated Starter Generator) that serves as both an electric motor and a generator.

[0133] The mobile body equipped with the rotary motor system is not limited to vehicles; it can also be an aircraft or a ship. Furthermore, the rotary motor system is not limited to systems mounted on mobile bodies; it can also be a stationary system.

[0134] The technical concepts extracted from the above embodiments are recorded as follows.

[0135] [Structure 1]

[0136] A winding-excited type rotary motor (40) has the following features:

[0137] Stator (50), which has stator windings (52);

[0138] Rotor (60), the rotor having a rotor core (61) and an excitation winding (70) wound around the rotor core; and

[0139] A circuit module (102) is configured to rotate integrally with the rotor and has electrical components connected to the excitation winding.

[0140] The rotor has a first circuit module (141) and a second circuit module (142) as the circuit module. The first circuit module is disposed on the first rotor end (X1) side, which is one axial side of the rotor core, and the second circuit module is disposed on the second rotor end (X2) side, which is the other axial side of the rotor core.

[0141] [Structure 2]

[0142] According to the winding-excited type rotary motor described in Structure 1, in the rotor, a radially protruding main pole portion (62) is provided in the rotor core for each circumferentially arranged magnetic pole, and the excitation winding has a plurality of pole coils (110) provided in each of the main pole portions and formed by winding wire.

[0143] The plurality of pole coils are divided into pole coils included in a first coil group and pole coils included in a second coil group.

[0144] The winding ends of the first coil group are electrically connected to the electrical components of the first circuit module, and the winding ends of the second coil group are electrically connected to the electrical components of the second circuit module.

[0145] [Structure 3]

[0146] According to Structure 2, in the winding-excited type rotary motor, the ends of the conductors of the pole coils included in the first coil group extend toward the first rotor end side and are electrically connected to the electrical components of the first circuit module at the first rotor end side.

[0147] The ends of the conductors of the pole coils included in the second coil group are led out toward the end side of the second rotor and are electrically connected to the electrical components of the second circuit module at the end side of the second rotor.

[0148] [Structure 4]

[0149] According to the winding-excited type rotating electric motor described in structure 2 or 3, the rotor core has four or more, and an even number of, the main pole portions.

[0150] In the main pole portions arranged circumferentially in the rotor core, the pole coils included in the first coil group and the pole coils included in the second coil group are arranged alternately one by one in the circumferential direction.

[0151] [Structure 5]

[0152] According to the winding-excited rotating electric motor described in structure 2 or 3, the rotor core has 4×n main pole portions, where n is an integer.

[0153] In each of the main pole portions arranged circumferentially in the rotor core, the pole coils included in the first coil group and the pole coils included in the second coil group are arranged alternately in pairs circumferentially.

[0154] [Structure 6]

[0155] According to any one of structures 2 to 5, a winding-excited type rotating electric motor (40) is used to induce an excitation current in the excitation winding, through which a high-frequency current flows in the stator winding.

[0156] The first circuit module and the second circuit module each have diodes (91, 93) and capacitors (92, 94) as electrical components, and have circuits that rectify the excitation current in the first coil group and the second coil group respectively when the stator winding is energized.

[0157] [Structure 7]

[0158] According to Structure 1, the winding-excited type rotary motor (40) is used to induce an excitation current in the excitation winding, through which a high-frequency current flows in the stator winding.

[0159] The excitation winding has a first winding portion (71) wound radially outward and a second winding portion (72) wound radially inward in a plurality of main pole portions (62) disposed in the rotor core, and these first winding portions and second winding portions are connected in series.

[0160] The circuit module has:

[0161] A first closed loop, connected to both ends of either the first winding section or the second winding section, and rectifying the current flowing through that winding section in one direction when the stator winding is energized; and

[0162] The second closed loop is connected to both ends of the series connector between the first winding section and the second winding section, and rectifyes the current flowing through the series connector in one direction when the stator winding is energized.

[0163] The electrical components constituting the first closed loop are mounted in the first circuit module, and the electrical components constituting the second closed loop are mounted in the second circuit module.

[0164] [Structure 8]

[0165] According to any one of structures 1 to 7, the winding-excited type rotary motor has a first refrigerant supply section that supplies refrigerant to the first circuit module and a second refrigerant supply section that supplies refrigerant to the second circuit module.

[0166] While this disclosure is described based on embodiments, it is to be understood that this disclosure is not limited to those embodiments or constructions. This disclosure covers various modifications and equivalent variations. Furthermore, various combinations and methods, including only one element, or more than, or less than, other combinations and methods, also fall within the scope and spirit of this disclosure.

Claims

1. A winding-excited type rotary electric motor (40), comprising: Stator (50), which has stator windings (52); Rotor (60), the rotor having a rotor core (61) and an excitation winding (70) wound around the rotor core; and A circuit module (102) is configured to rotate integrally with the rotor and has electrical components connected to the excitation winding. Its features are, The rotor has a first circuit module (141) and a second circuit module (142) as the circuit module. The first circuit module is disposed on the first rotor end (X1) side, which is one axial side of the rotor core, and the second circuit module is disposed on the second rotor end (X2) side, which is the other axial side of the rotor core.

2. The winding-excited rotary motor according to claim 1, characterized in that, In the rotor, the rotor core is provided with a radially protruding main pole portion (62) for each circumferentially arranged magnetic pole, and the excitation winding has a plurality of pole coils (110) provided in each of the main pole portions and formed by winding wire. The plurality of pole coils are divided into pole coils included in a first coil group and pole coils included in a second coil group. The winding ends of the first coil group are electrically connected to the electrical components of the first circuit module, and the winding ends of the second coil group are electrically connected to the electrical components of the second circuit module.

3. The winding-excited rotary motor according to claim 2, characterized in that, The ends of the conductors of the pole coils included in the first coil group are led out toward the first rotor end side and electrically connected to the electrical components of the first circuit module at the first rotor end side. The ends of the conductors of the pole coils included in the second coil group are led out toward the end side of the second rotor and are electrically connected to the electrical components of the second circuit module at the end side of the second rotor.

4. The winding-excited rotary motor according to claim 2, characterized in that, The rotor core has four or more, and an even number of, the main pole portions. In the main pole portions arranged circumferentially in the rotor core, the pole coils included in the first coil group and the pole coils included in the second coil group are arranged alternately one by one in the circumferential direction.

5. The winding-excited rotary motor according to claim 2, characterized in that, The rotor core has 4×n main pole sections, where n is an integer. In each of the main pole portions arranged circumferentially in the rotor core, the pole coils included in the first coil group and the pole coils included in the second coil group are arranged alternately in pairs circumferentially.

6. The winding-excited rotary motor (40) according to any one of claims 2 to 5, characterized in that, A high-frequency current used to induce an excitation current in the excitation winding flows through the stator winding. The first circuit module and the second circuit module each have diodes (91, 93) and capacitors (92, 94) as electrical components, and have circuits that rectify the excitation current in the first coil group and the second coil group respectively when the stator winding is energized.

7. The winding-excited rotary motor (40) according to claim 1, characterized in that, A high-frequency current used to induce an excitation current in the excitation winding flows through the stator winding. The excitation winding has a first winding portion (71) wound radially outward and a second winding portion (72) wound radially inward in a plurality of main pole portions (62) disposed in the rotor core, and these first winding portions and second winding portions are connected in series. The circuit module has: A first closed loop is connected to both ends of either the first winding section or the second winding section, and rectifyes the current flowing through that winding section in one direction when the stator winding is energized. as well as The second closed loop is connected to both ends of the series connector between the first winding section and the second winding section, and rectifyes the current flowing through the series connector in one direction when the stator winding is energized. The electrical components constituting the first closed loop are mounted in the first circuit module, and the electrical components constituting the second closed loop are mounted in the second circuit module.

8. The winding-excited rotary motor according to claim 1, characterized in that, It has a first refrigerant supply unit that supplies refrigerant to the first circuit module and a second refrigerant supply unit that supplies refrigerant to the second circuit module.

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