Wound field rotary electric machine

Abstract

This wound field rotary electric machine (40) has: a stator (50) having a stator coil (52); a rotor (60) having a rotor core (61) and a field coil (70); and electrical circuit modules (102) provided so as to be able to rotate integrally with the rotor and having an electrical component connected to the field coil. As the electrical circuit modules, the rotor has a first circuit module (141) disposed on the side having a first rotor end (X1) that is one side in the axial direction of the rotor core, and a second circuit module (142) disposed on the side having a second rotor end (X2) that is the other end side in the axial direction of the rotor core.

Description

Wound-field type rotating electric machine CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application is based on Japanese Application No. 2024-005114, filed on January 17, 2024, the contents of which are incorporated herein by reference.

[0002] The disclosure in this specification relates to a wound field type rotating electric machine.

[0003] In a wound-field rotating electric machine, the rotor has a rotor core with multiple main poles (magnetic salient poles) arranged circumferentially, and a field winding wound around the main poles. Also, a known configuration is one in which a circuit module equipped with capacitors and diodes as electrical components is provided on one of the axial ends of the rotor (see Patent Document 1). The capacitors and other components are held in the circuit module by a component holder.

[0004] Japanese Patent Application Laid-Open No. 2020-124100

[0005] In a rotor with the above configuration, the circuit module is located on one axial side of the rotor. Therefore, when electrical components in the circuit module generate heat as current flows through them, the heat is concentrated on one axial side of the rotor. For example, if the number of electrical components in the circuit module increases, the heat distribution becomes more pronounced. In this case, there is a concern that the circuit module and its surrounding area on the rotor may become locally overheated.

[0006] The present disclosure has been made in consideration of the above circumstances, and has an object to provide a wound-field rotating electric machine that can prevent the rotor from becoming overheated.

[0007] The present disclosure relates to a wound-field rotating electric machine having: a stator having a stator winding; a rotor having a rotor core and a field winding wound around the rotor core; and an electric circuit module that is rotatable integrally with the rotor and has electric components connected to the field winding, wherein the rotor has, as the electric circuit modules, a first circuit module arranged on a first rotor end side that is one axial end of the rotor core, and a second circuit module arranged on a second rotor end side that is the other axial end of the rotor core.

[0008] In a wound-field rotating electric machine, an electric circuit module having electric components connected to a field winding is configured to include a first circuit module arranged on one axial end of the rotor core, that is, a first rotor end, and a second circuit module arranged on the other axial end of the rotor core, that is, a second rotor end. This allows heat generated by the electric components in the electric circuit module to be dispersed to both axial sides of the rotor, thereby preventing the rotor from becoming overheated.

[0009] The above and other objects, features, and advantages of the present disclosure will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which Fig. 1 is an overall configuration diagram of a control system for a rotating electric machine, Fig. 2 is a diagram showing an inverter and its peripheral configuration, Fig. 3 is a cross-sectional view of a rotor and a stator, Fig. 4 is a diagram showing an electric circuit provided in the rotor, Fig. 5 is an exploded perspective view of the rotor, Fig. 6 is an exploded perspective view of a winding unit in a rotor main section, Fig. 7 is a cross-sectional view of the rotor main section, Fig. 8 is a diagram showing a vertical cross-sectional configuration of a rotating electric machine, Fig. 9 is a cross-sectional view of the rotor main section, Fig. 10 is a diagram showing an electrical connection state between each coil module of a winding unit and each circuit module, Fig. 11 is a diagram for explaining a cooling structure in the rotating electric machine, and Fig. 12 is a cross-sectional view of the rotor main section. 13 is a diagram showing the electrical connection state between each coil module of the winding unit and each circuit module, FIG. 14 is a cross-sectional view of the rotor main part, FIG. 15 is a diagram showing the electrical connection state between each coil module of the winding unit and each circuit module, FIG. 16 is a diagram showing the electrical connection state between each coil module of the winding unit and each circuit module, FIG. 17 is a diagram showing the electrical connection state between each coil module of the winding unit and each circuit module, FIG. 18 is a diagram showing the electrical connection state between each coil module of the winding unit and each circuit module, FIG. 19 is a diagram showing an electrical circuit provided in the rotor, and FIG. 20 is a diagram showing an electrical circuit provided in the rotor.

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A wound-field rotating electric machine according to an embodiment of the present disclosure is used as a power source for driving electric vehicles such as electric vehicles and hybrid vehicles.

[0011] First, a control system including a rotating electric machine will be described with reference to Fig. 1. The control system includes a DC power supply 10, an inverter 20, a control device 30, and a rotating electric machine 40. The rotating electric machine 40 is a self-excited wound field type synchronous machine. For example, the rotating electric machine 40, the inverter 20, and the control device 30 may be configured as an electromechanical integrated drive device, or the rotating electric machine 40, the inverter 20, and the control device 30 may each be configured as a separate component.

[0012] The rotating electric machine 40 includes a housing 41, and a stator 50 and a rotor 60 housed in the housing 41. The rotating electric machine 40 of this embodiment is an inner rotor type rotating electric machine in which the rotor 60 is disposed radially inside the stator 50.

[0013] The stator 50 includes a stator core 51 and a stator winding 52. The stator winding 52 is made of, for example, copper wire, and includes U-, V-, and W-phase windings 52U, 52V, and 52W that are arranged with an electrical angle offset of 120° from one another.

[0014] The rotor 60 includes a rotor core 61 and a field winding 70. The field winding 70 may be made of, for example, aluminum wire, which has a low specific gravity and is easily formed. The field winding 70 is not limited to aluminum wire, and may be made of, for example, copper wire or CNT (carbon nanotube). A rotating shaft 32 is attached to the center hole of the rotor core 61. The rotating shaft 32 is rotatably supported by bearings 42 and 43 in the housing 41.

[0015] As shown in FIG. 2 , the inverter 20 includes a series connection of upper-arm switches SUp, SVp, and SWp for U, V, and W phases and lower-arm switches SUn, SVn, and SWn for U, V, and W phases. First ends of U-, V-, and W-phase windings 52U, 52V, and 52W are connected to the connection points between the upper-arm switches SUp, SVp, and SWp and the lower-arm switches SUn, SVn, and SWn for each phase. Second ends of the U-, V-, and W-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 may also be delta-connected. In this embodiment, each of the switches SUp to SWn is, for example, an IGBT. A freewheel diode is connected in antiparallel to each of the switches SUp to SWn.

[0016] The collectors of the upper arm switches SUp, SVp, SWp of each phase are connected to the positive terminal of a DC power supply 10. The emitters of the lower arm switches SUn, SVn, SWn of each phase are connected to the negative terminal of the DC power supply 10. A smoothing capacitor 11 is connected in parallel to the DC power supply 10.

[0017] Next, the stator 50 and the rotor 60 will be described with reference to FIG.

[0018] The stator 50 and the 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 referred to as the axial direction, the direction extending radially from the center of the rotating shaft 32 is referred to as the radial direction, and the direction extending circumferentially around the rotating shaft 32 is referred to as the circumferential direction.

[0019] The stator core 51 is made of laminated steel plates made of a soft magnetic material and has an annular back yoke 51a and multiple teeth 51b protruding radially inward from the back yoke 51a. Multiple slots 54 are formed between adjacent teeth 51b in the circumferential direction. The stator winding 52 is formed by accommodating the phase windings of each phase in a predetermined order in each of these slots 54. For example, the stator 50 may employ a segment coil structure using multiple conductor segments. However, the structure of the stator winding 52 is arbitrary.

[0020] The rotor core 61 is made of a soft magnetic material, for example, laminated steel plates. The rotor core 61 has a cylindrical portion 61a and a plurality of main pole portions 62 that protrude radially outward from the cylindrical portion 61a. A field winding 70 is wound around the main pole portions 62 by concentrated winding. In this embodiment, eight main pole portions 62 are provided at equal intervals in the circumferential direction.

[0021] The field winding 70 includes a first winding portion 71 and a second winding portion 72. The first winding portion 71 is wound radially outward around each main pole portion 62, and the second winding portion 72 is wound radially inward relative to the first winding portion 71. 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, among circumferentially adjacent main pole portions 62, the winding direction of the winding portions 71, 72 wound around one is opposite to the winding direction of the winding portions 71, 72 wound around the other. Therefore, the magnetization directions of circumferentially adjacent main pole portions 62 are opposite to each other. In the rotor 60, the main pole portions 62 in the rotor core 61 and the field winding 70 wound around each main pole portion 62 form a plurality of magnetic poles (field poles) arranged circumferentially.

[0022] FIG. 4 is a diagram showing an electrical circuit on the rotor 60 side including the first and second winding portions 71 and 72. The first winding portion 71 and the second winding portion 72 are connected in series by connecting the second end 71b of the first winding portion 71 to the first end 72a of the second winding portion 72. A diode 91 and a capacitor 92 are connected to the second end 71b of the first winding portion 71 in parallel with the second winding portion 72. A diode 93 and a capacitor 94 are connected in series to the series connection of the first winding portion 71 and the second winding portion 72. In the following description, the diode 91 and the capacitor 92 connected in parallel with the second winding portion 72 are also referred to as the parallel diode 91 and the parallel capacitor 92, respectively. The diode 93 and the capacitor 94 connected in series to the series connection of the first winding portion 71 and the second winding portion 72 are also referred to as the series diode 93 and the series capacitor 94, respectively. The capacitors 92 and 94 are, for example, ceramic capacitors or film capacitors.

[0023] The parallel diode 91 has a cathode connected to the first end 72a of the second winding portion 72 and an anode connected to the second end 72b of the second winding portion 72. As a result, in a closed circuit including the second winding portion 72 and the parallel diode 91, current flows in one direction, from the anode side to the cathode side of the parallel diode 91. Furthermore, the series diode 93 has a cathode connected to the first end 71a of the first winding portion 71 and an anode connected to the second end 72b of the second winding portion 72. As a result, the field current flowing through each winding portion 71, 72 is rectified. In this embodiment, the number of turns of the second winding portion 72 is greater than the number of turns of the first winding portion 71.

[0024] Returning to the description of FIG. 2 , the control device 30 is an electronic control unit (EC) primarily composed of a microcomputer 31. The microcomputer 31 includes a central processing unit (CPU). The functions provided by the microcomputer 31 can be provided by software stored in a physical memory device and a computer executing the software, software alone, hardware alone, or a combination thereof. For example, if the microcomputer 31 is provided by a hardware electronic circuit, the functions can be provided by a digital circuit including multiple logic circuits or an analog circuit. For example, the microcomputer 31 executes a program stored in a non-transitory tangible storage medium (NSS) that serves as its own storage unit. The program includes a program for controlling the rotating electric machine 40. A method corresponding to the program is executed by executing a set of instructions that constitute the program. The storage unit is, for example, a non-volatile memory. The program stored in the storage unit can be updated via a communication network such as the Internet, for example, via OTA (Over the Air).

[0025] The control device 30 generates drive signals that turn on and off the switches SUp to SWn that constitute the inverter 20. Specifically, the control device 30 generates drive signals that turn on and off the switches SUp to SWn and supplies the generated drive signals to the gates of the switches SUp to SWn in order to convert the DC power output from the DC power supply 10 into AC power and supply the AC power to the U-, V-, and W-phase windings 52U, 52V, and 52W. As a result, the upper and lower arm switches in each phase are alternately turned on with dead times therebetween.

[0026] The control device 30 turns on and off the switches SUp to SWn so that a composite current of a fundamental current and a high-frequency current (specifically, a high-frequency excitation current) having a frequency higher than that of the fundamental current flows through each of the phase windings 52U, 52V, and 52W. The fundamental current is a current that mainly serves to generate torque in the rotary electric machine 40. The high-frequency current is a current that mainly serves to excite the first and second winding portions 71 and 72 that constitute the field winding 70, thereby inducing a field current in the field winding 70. The phase currents flowing through the phase windings 52U, 52V, and 52W are shifted by 120 electrical degrees.

[0027] The high-frequency current flowing through the stator winding 52 may be a harmonic current whose fluctuating frequency is N times (N is an integer of 2 or more) the frequency of the fundamental current, or may be a current whose fluctuating frequency is different from N times the frequency of the fundamental current.

[0028] When a high-frequency current flows through the stator winding 52, a voltage is induced in the first and second winding portions 71 and 72, causing a field current to flow. The induced voltages in the first and second winding portions 71 and 72 are, for example, in phase. The currents IL1 and IL2 flowing through the first and second winding portions 71 and 72 contain frequency components of the high-frequency current.

[0029] In the electric circuit shown in Fig. 4, when the first and second winding portions 71, 72 are excited by energizing the stator winding 52, a current flows from the first winding portion 71 to the second winding portion 72. Furthermore, when the voltage across the second winding portion 72 exceeds the forward voltage of the parallel diode 91, a current IL2, which is greater than the current IL1 flowing through the first winding portion 71, flows through the closed circuit including the second winding portion 72 and the parallel diode 91. The current flowing through the closed circuit including the second winding portion 72 and the parallel diode 91 increases the DC component of the field current. This increases the DC component of the magnetic flux of the rotor 60, thereby increasing the torque of the rotating electric machine 40.

[0030] Furthermore, when a current flows through the closed circuit including the second winding portion 72 and the parallel diode 91, a portion of the current flows through the first winding portion 71. In this case, the direction of the current IL1 flowing through the first winding portion 71 and the direction of the current IL2 flowing through the second winding portion 72 are opposite to each other. This reduces the pulsation of the field current, which is the sum of the currents IL1 and IL2, and ultimately reduces the torque pulsation of the rotating electric machine 40.

[0031] Next, the configuration of the rotor 60 will be described in more detail. Fig. 5 is an exploded perspective view of the rotor 60. Fig. 6 is an exploded perspective view of the winding unit 110 in the rotor main section 101, and Fig. 7 is a cross-sectional view showing the cross-sectional structure of a portion of the rotor main section 101.

[0032] The rotor 60 has a rotor main section 101 and a circuit module 102 provided at one end of the rotor main section 101 in the axial direction. As described in FIG. 3 , the rotor main section 101 includes the rotor core 61 and the field winding 70, and the rotating shaft 32 is attached to the center hole of the rotor core 61. The field winding 70 is made up of a plurality of winding units 110 arranged in the circumferential direction. 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 provided at a position axially opposite a coil end of the field winding 70 that is axially outer than the rotor core 61. The circuit module 102 corresponds to an "electrical circuit module."

[0033] The rotor main section 101 has a plurality of winding units 110, one for each magnetic pole of the rotor 60. Each winding unit 110 is formed in an annular shape with the axial direction as the longitudinal direction, and is assembled to the rotor core 61 with the main pole section 62 of the rotor core 61 inserted into its hollow section. In this embodiment, the winding units 110 form a "pole coil."

[0034] The winding unit 110 has a first coil module 111 that is located on the radially outer side when attached to the main pole portion 62, and a second coil module 112 that is located on the radially inner side. The first coil module 111 is a coil module that corresponds to the first winding portion 71, and the second coil module 112 is a coil module that corresponds to the second winding portion 72.

[0035] The first coil module 111 has an annular coil body 121 formed by multiple windings of a conductor material made of a rectangular wire in the circumferential and radial directions, and a thin plate-like insulator 122 provided integrally with the coil body 121. The insulator 122 has a portion that extends circumferentially and covers the outer peripheral portions on the radially outer and inner sides of the coil body 121, and a portion that extends radially and covers the hollow portion of the coil body 121. In other words, the outer peripheral portion on the radially outer side and the inner peripheral portion and hollow portion of the coil body 121 are insulated and coated with the insulator 122.

[0036] The second coil module 112 has an annular coil body 123 formed by multiple windings of a conductor material made of a rectangular wire in the circumferential and radial directions, and a thin plate-like insulator 124 provided integrally with the coil body 123. The insulator 124 has a portion that extends circumferentially and covers the outer peripheral portions on the radially outer and inner sides of the coil body 123, and a portion that extends radially and covers the hollow portion of the coil body 123. In other words, the outer peripheral portion on the radially outer side, the inner peripheral portion on the radially inner side, and the hollow portion of the coil body 123 are insulated and coated with the insulator 124.

[0037] The coil bodies 121 and 123 are air-core coils configured as, for example, α-winding coils. The flat wire used for the coil bodies 121 and 123 has a substantially rectangular cross section (specifically, a substantially rectangular shape) and is composed of a conductor portion made of aluminum or the like and an insulating layer covering the conductor portion. However, it is also possible to use a round wire with a circular cross section as the conductor material.

[0038] As shown in Fig. 7, the first coil module 111 has two radially wound layers of conductor wire, while the second coil module 112 has six radially wound layers. The coil modules 111, 112 have different numbers of circumferential windings (i.e., the number of rows of conductor wire in the circumferential direction), with the number of windings being greater on the radially outer side than on the radially inner side. This improves the space factor of the field winding 70. Ignoring the space factor, it is also possible to make the number of circumferential windings the same for all of the radially arranged coil bodies 121, 123.

[0039] Furthermore, in the rotor main section 101, holding plates 125 and 126 are provided between the main pole sections 62 of the rotor core 61 to maintain the assembled state of the first coil module 111 and the second coil module 112 when these coil modules 111 and 112 are assembled to each main pole section 62. The holding plate 125 is attached to the radial outside of the first coil module 111, and the holding plate 126 is attached between the first coil module 111 and the second coil module 112.

[0040] 6 , in the winding unit 110 of each magnetic pole, two conductor ends 127 are drawn out in the axial direction from the first coil module 111, and six conductor ends 128 are drawn out in the axial direction from the second coil module 112. In each of the winding units 110 arranged in the circumferential direction, the conductor ends 127, 128 are joined to each other by welding or the like, so that the multiple first coil modules 111 provided in each main pole portion 62 are connected in series, and the multiple second coil modules 112 provided in each main pole portion 62 are connected in series.

[0041] The configuration for connecting the windings (coil modules 111, 112) of the main pole parts 62 arranged in the circumferential direction may be other than the configuration in which the conductor ends 127, 128 of the coil modules 111, 112 are joined together by welding or the like as described above. For example, a configuration in which the conductor wire is continuously wound around the multiple main pole parts 62 so as to straddle the multiple main pole parts 62 (continuous winding configuration) may be used.

[0042] 5, the circuit module 102 includes a component holder 130 made of an electrically insulating material. Specifically, the component holder 130 is a resin molded body made of a resin material. The component holder 130 is generally disk-shaped with a center hole 131 in the center. The component holder 130 is configured to be assembled to the rotating shaft 32 with the rotating shaft 32 inserted through the center hole 131.

[0043] The component holder 130 holds electrical components E, including diodes 91 and 93 and capacitors 92 and 94, surrounding the central hole 131. These electrical components E are electrically connected via a bus bar (not shown). In the component holder 130, the winding ends of the first winding section 71, which is made up of a plurality of first coil modules 111, and the winding ends of the second winding section 72, which is made up of a plurality of second coil modules 112, are electrically connected to an electrical circuit made up of the diodes 91 and 93 and the capacitors 92 and 94 (see FIG. 4 ).

[0044] In a configuration in which the circuit modules 102 are arranged on one axial side of the rotor 60, when the electrical components E in the circuit modules 102 generate heat as a result of current flow, the heat is concentrated on one axial side of the rotor 60. For example, if the number of electrical components E in the circuit modules 102 increases, the heat distribution becomes more pronounced. In this case, there is a concern that the circuit modules 102 in the rotor 60 may become locally overheated.

[0045] Therefore, in this embodiment, as shown in Figure 8, a first circuit module 141 and a second circuit module 142 are provided as the circuit module 102, and the first circuit module 141 is arranged on the side of the first rotor end X1, which is on one axial end of the rotor core 61 (left side of the figure), and the second circuit module 142 is arranged on the side of the second rotor end X2, which is on the other axial end of the rotor core 61 (right side of the figure).

[0046] The first circuit module 141 and the second circuit module 142 each have an electric circuit shown in Fig. 4. The electric circuit of the first circuit module 141 is electrically connected to half of the plurality of winding units 110 on the first rotor end X1 side via winding end portions Y. The electric circuit of the second circuit module 142 is electrically connected to the remaining half of the plurality of winding units 110 on the second rotor end X2 side via winding end portions Y. The winding end portions Y on the first rotor end X1 side and the winding end portions Y on the second rotor end X2 side correspond to the first end 71a and second end 71b of the first winding portion 71 and the first end 72a and second end 72b of the second winding portion 72 in Fig. 4.

[0047] In the rotating electric machine 40, each circuit module 141, 142 is preferably disposed in a hollow space surrounded by coil ends SE1, SE2 of the stator winding 52 on both axial sides of the stator winding 52. In other words, the coil ends SE1, SE2 serve as stator coil ends, and are located axially outward of the axial end face of the stator core 51 in the stator winding 52. The circuit modules 141, 142 are disposed on the inner circumferential side of the coil ends SE1, SE2 that are connected in an annular shape at one axial end side (first rotor end X1 side) and the other axial end side (second rotor end X2 side).

[0048] As described above, the multiple winding units 110 are divided into halves, and each half of the winding units 110 is electrically connected to each of the circuit modules 141, 142 on both sides in the axial direction. The specific configuration is described below.

[0049] Figure 9 is a cross-sectional view of the rotor main section 101. Figure 9 shows eight main pole sections 62 lined up in the circumferential direction and winding units 110 wound around each main pole section 62. In Figure 9, of the eight winding units 110, four winding units 110 connected to the first circuit module 141 are surrounded by a solid line frame, and these winding units 110 are referred to as "winding units 110A." In addition, the remaining four winding units 110 connected to the second circuit module 142 are surrounded by a dashed line frame, and these winding units 110 are referred to as "winding units 110B."

[0050] Here, the four winding units 110A connected to the first circuit module 141 are referred to as the "first coil group," and the four winding units 110B connected to the second circuit module 142 are referred to as the "second coil group." The winding units 110A included in the first coil group and the winding units 110B included in the second coil group are alternately arranged in the circumferential direction. In this embodiment, the winding directions of the conductor wires of adjacent winding units 110 are opposite to each other. Therefore, the winding directions of the winding units 110A included in the first coil group are all the same, and the winding directions of the winding units 110B included in the second coil group are all the same. Furthermore, the winding directions of the winding units 110A included in the first coil group and the winding directions of the winding units 110B included in the second coil group are opposite to each other.

[0051] FIG. 10 is a diagram showing the electrical connection state between the first coil module 111 and the second coil module 112 of each winding unit 110 and the first circuit module 141 and the second circuit module 142.

[0052] 10 shows eight first coil modules 111 constituting the first winding section 71 and eight second coil modules 112 constituting the second winding section 72 lined up in the left-right direction. The upper side of the figure is the first rotor end X1 side, and the lower side of the figure is the second rotor end X2 side, with the first circuit module 141 disposed on the first rotor end X1 side and the second circuit module 142 disposed on the second rotor end X2 side. Of the eight coil modules 111, 112, the coil modules 111, 112 included in the first coil group are referred to as "coil modules 111A, 112A," and the coil modules 111, 112 included in the second coil group are referred to as "coil modules 111B, 112B," with the coil modules 111A, 112A hatched to distinguish them.

[0053] 10 , each of the four coil modules 111A, 112A included in the first coil group is electrically connected to a first circuit module 141 on the first rotor end X1 side. Similarly, each of the four coil modules 111B, 112B included in the second coil group is electrically connected to a second circuit module 142 on the second rotor end X2 side. As in FIG. 4 , each of the circuit modules 141, 142 has an electrical circuit including diodes 91, 93 and capacitors 92, 94, and each circuit module is capable of rectifying the field current. However, in each of the circuit modules 141, 142, the capacitor capacitance only needs to be determined according to the number of winding units 110 in each coil group. Compared to a configuration in which one circuit module 102 is electrically connected to eight winding units 110, the capacitor capacitance only needs to be about half.

[0054] In each of the four coil modules 111A, 112A included in the first coil group, the conductor ends of each coil module 111A, 112A are drawn out to the first rotor end X1 side and connected to each other. Also, on the first rotor end X1 side, the winding ends of the first coil module 111A, which form both ends of the first winding section 71, and the winding ends of the second coil module 112A, which form both ends of the second winding section 72, are each connected to the electrical circuit of the first circuit module 141 as shown in the figure.

[0055] In each of the four coil modules 111B, 112B included in the second coil group, the conductor ends of each coil module 111B, 112B are drawn out to the second rotor end X2 side and connected to each other. Also, on the second rotor end X2 side, the winding ends of the first coil module 111B, which form both ends of the first winding section 71, and the winding ends of the second coil module 112B, which form both ends of the second winding section 72, are each connected to the electrical circuit of the second circuit module 142 as shown in the figure.

[0056] 9 and 10 , the configuration in which the winding units 110A included in the first coil group and the winding units 110B included in the second coil group are alternately arranged one by one in the circumferential direction on each main pole portion 62 of the rotor core 61 can be realized by providing an even number of main pole portions 62, equal to or greater than four, on the rotor core 61. Therefore, the number of main pole portions 62 provided on the rotor core 61 may be 4, 6, 10, 12, 14, 16, etc., in addition to the above-mentioned eight.

[0057] 10 , when the stator winding 52 is energized, a high-frequency current flowing through the stator winding 52 causes a field current to flow through the coil modules 111A and 112A (winding unit 110A) included in the first coil group and the coil modules 111B and 112B (winding unit 110B) included in the second coil group via the electrical circuits of the circuit modules 141 and 142. In this case, a field magnetic flux can be generated individually in each coil group. This allows the field winding 70 in the rotor 60 to be excited with redundancy.

[0058] Here, each circuit module 141, 142 is preferably configured so that, when the stator winding 52 is energized, the same level of field current flows through the coil modules 111, 112 of each coil group. In this case, compared to when 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 field current generated in each coil group is approximately the same, so the combined field flux of both coil groups is approximately the same. The torque generated in each coil group is approximately half that of when eight coil modules 111, 112 are connected in series. Furthermore, the voltage generated in each coil group is slightly higher than half that of when eight coil modules 111, 112 are connected in series.

[0059] 9 and 10 , the coil modules 111A, 112A (winding units 110A) included in the first coil group and the coil modules 111B, 112B (winding units 110B) included in the second coil group are alternately arranged in the circumferential direction on each of the main poles 62 aligned in the circumferential direction of the rotor 60. Therefore, when the field winding 70 is redundantly energized by the two circuit modules 141, 142, the field flux of each magnetic pole generated by energizing the first circuit module 141 and the field flux of each magnetic pole generated by energizing the second circuit module 142 are evenly and finely distributed in the circumferential direction. In this case, each coil group can generate field flux at polygonal positions (quadratic positions in FIG. 9 ) that are equal to half the total number of poles when viewed in the circumferential direction of the rotor 60.

[0060] Furthermore, even if one of the two circuit modules 141, 142 malfunctions due to a failure, the other circuit module can excite the field winding 70, allowing the rotary electric machine 40 to continue to rotate. In other words, because the field winding 70 is divided into two independent systems, even if a failure occurs in one of the circuit modules 141, 142, the rotary electric machine 40 can continue to rotate while generating at least about half the torque.

[0061] In the configuration in which the circuit module 102 is divided into two circuit modules 141 and 142 as described above, it is possible to reduce the number and size of electrical components in the individual circuit modules 141 and 142. This reduces the size of each circuit module 141 and 142. In other words, the axial thickness of each circuit module 141 and 142 is reduced. This allows the rotating electric machine 40 to be made smaller.

[0062] Incidentally, if the orientation of the diodes 91, 93 is reversed in either one of the circuit modules 141, 142, the direction of the field current is reversed in the winding unit 110 connected to that circuit module. Therefore, even if the field winding 70 is configured such that all of the windings in the circumferential direction are wound in the same direction, it is possible to generate field fluxes of opposite polarities in each of the main pole portions 62 that are adjacent in the circumferential direction.

[0063] Furthermore, the rotating electric machine 40 of this embodiment has a configuration in which each of the circuit modules 141, 142 arranged on both axial sides is individually cooled. This configuration will be described with reference to FIG. 11 . In FIG. 11 , the left side of the drawing is the first rotor end X1 side, and the right side is the second rotor end X2 side. In this configuration, the rotating electric machine 40 has a first refrigerant supply unit that supplies refrigerant to the first circuit module 141 and a second refrigerant supply unit that supplies refrigerant to the second circuit module 142. In this configuration, each of the circuit modules 141, 142 is cooled using a refrigerant such as cooling water or cooling oil.

[0064] The housing 41 of the rotary electric machine 40 is provided with inlets 151 and 152 at both axial ends of the rotor 60 (i.e., the first rotor end X1 side and the second rotor end X2 side) as refrigerant intake sections for taking in refrigerant. Furthermore, the housing 41 is provided with a refrigerant passage 153 at the first rotor end X1 side that guides the refrigerant taken in from the inlet 151 toward the first circuit module 141, and with a refrigerant passage 154 at the second rotor end X2 side that guides the refrigerant taken in from the inlet 152 toward the second circuit module 142. The inlet 151 and the refrigerant passage 153 correspond to the "first refrigerant supply section," and the inlet 152 and the refrigerant passage 154 correspond to the "second refrigerant supply section."

[0065] Furthermore, the housing 41 is provided with outlets 155 and 156 at both axial ends of the rotor 60 (i.e., the first rotor end X1 side and the second rotor end X2 side) as refrigerant discharge portions for discharging the refrigerant.

[0066] The coolant supply system that supplies coolant to the rotating electrical machine 40 includes a circulation passage 161 that circulates the coolant, as well as a circulation pump 162 and a heat dissipation unit 163 that are provided 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 coolant into the atmosphere. The coolant flows through the circulation passage 161 when the circulation pump 162 is driven.

[0067] When the rotating electrical machine 40 is driven to rotate, the coolant flowing in from the circulation passage 161 is supplied to each of the circuit modules 141, 142 through the coolant passages 153, 154. As a result, each of the circuit modules 141, 142 is individually cooled by the coolant.

[0068] The refrigerant supply system may be configured such that separate systems are constructed for the first circuit module 141 and the second circuit module 142. In this case, it is preferable that the refrigerant is supplied to the first circuit module 141 and the second circuit module 142 via separate circulation passages 161.

[0069] According to the present embodiment described above in detail, the following excellent effects can be obtained.

[0070] In the rotor 60, the first circuit module 141 is disposed on the first rotor end X1 side, which is one axial end of the rotor core 61, and the second circuit module 142 is disposed on the second rotor end X2 side, which is the other axial end of the rotor core 61. As a result, when electrical components in each of the circuit modules 141, 142 generate heat as current is passed through them, the heat is dispersed to both axial sides of the rotor 60. In other words, the heat source is dispersed in the rotor 60. As a result, the rotor 60 can be prevented from becoming overheated.

[0071] Of the multiple winding units 110 (coil modules 111, 112) arranged in the circumferential direction, half of the winding units 110A are classified as a first coil group, and the remaining half of the winding units 110B are classified as a 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, field current can be passed through the first coil group and the second coil group separately. This allows the field winding 70 in the rotor 60 to be excited redundantly. Furthermore, the redundancy of the electrical circuit improves fault tolerance.

[0072] In the winding unit 110A included in the first coil group, conductor ends are drawn out to the first rotor end X1 side and are electrically connected to the electrical components of the first circuit module 141, while in the winding unit 110B included in the second coil group, conductor ends are drawn out to the second rotor end X2 side and are electrically connected to the electrical components of the second circuit module 142. This allows for suitable electrical connections to be made on both the first rotor end X1 side and the second rotor end X2 side.

[0073] The winding units 110A included in the first coil group and the winding units 110B included in the second coil group are arranged alternately in the circumferential direction on each of the main poles 62 arranged circumferentially on the rotor core 61. In this case, when the field winding 70 is redundantly energized by the two circuit modules 141, 142, the field magnetic flux of each magnetic pole generated by energizing the first circuit module 141 and the field magnetic flux of each magnetic pole generated by energizing the second circuit module 142 can be distributed evenly and finely in the circumferential direction. This reduces rotational vibration in the rotor 60.

[0074] The first circuit module 141 and the second circuit module 142 have diodes 91, 93 and capacitors 92, 94, and are configured to have electric circuits that rectify the field current in the first coil group and the second coil group when current is applied to the stator winding 52. In this case, equal field currents flow through the first coil group and the second coil group due to the circuit modules 141, 142. Therefore, even if a failure occurs in one of the circuit modules 141, 142, it is possible to generate at least about half the torque.

[0075] The refrigerant is supplied individually to each of the circuit modules 141 and 142. This makes it possible to improve the cooling effect of each of the circuit modules 141 and 142.

[0076] (Other Embodiments) The above embodiment may be modified as follows, for example.

[0077] The rotor 60 may be configured to separate the first coil group and the second coil group as follows.

[0078] The configurations shown in Figures 12 and 13 are possible. Figure 12 is a cross-sectional view of the rotor main section 101, similar to Figure 9 described above. Figure 13 is a diagram showing the electrical connection state between the first coil module 111 and the second coil module 112 of each winding unit 110 and the first circuit module 141 and the second circuit module 142, similar to Figure 10 described above.

[0079] In the configuration shown in FIG. 12, winding units 110A included in the first coil group and winding units 110B included in the second coil group are alternately arranged two by two in the circumferential direction.

[0080] 13, each of the four coil modules 111A, 112A included in the first coil group is electrically connected to the first circuit module 141 on the first rotor end X1 side, and each of the four coil modules 111B, 112B included in the second coil group is electrically connected to the second circuit module 142 on the second rotor end X2 side.

[0081] The configuration in which the winding units 110A included in the first coil group and the winding units 110B included in the second coil group are alternately arranged two by two in the circumferential direction on each main pole portion 62 of the rotor core 61 can be realized by providing 4×n (n is an integer) main pole portions 62 on the rotor core 61. Therefore, the number of main pole portions 62 provided on the rotor core 61 may be 4, 12, 16, etc., other than the above-mentioned 8.

[0082] 12 and 13 , when the field winding 70 is redundantly energized by the two circuit modules 141, 142, the field flux of each magnetic pole generated by energizing the first circuit module 141 and the field flux of each magnetic pole generated by energizing the second circuit module 142 can be uniformly dispersed in the circumferential direction. This makes it possible to reduce rotational vibration in the rotor 60.

[0083] Also, the configurations shown in Figures 14 and 15 are possible. Figure 14 is a cross-sectional view of the rotor main section 101, similar to Figure 9 described above. Figure 15 is a diagram showing the electrical connection state between the first coil module 111 and the second coil module 112 of each winding unit 110 and the first circuit module 141 and the second circuit module 142, similar to Figure 10 described above.

[0084] In the configuration shown in Figure 14, the winding units 110A included in the first coil group and the winding units 110B included in the second coil group are arranged in equal numbers in the circumferential direction of the rotor core 61, divided into halves, on one side and the other side, respectively.

[0085] 15, each of the four coil modules 111A, 112A included in the first coil group is electrically connected to the first circuit module 141 on the first rotor end X1 side, and each of the four coil modules 111B, 112B included in the second coil group is electrically connected to the second circuit module 142 on the second rotor end X2 side.

[0086] 14 and 15, the coil modules 111, 112 included in the same coil group are arranged together, shortening the length of the conductor wire between the main pole parts 62. This reduces the winding resistance. Furthermore, with a continuous winding configuration, the conductor wire is wound continuously around the main pole parts 62 that are close to each other, which is thought to facilitate the winding work.

[0087] In the above embodiments, the eight winding units 110 arranged in the circumferential direction are divided into two coil groups, and the electric circuits of the circuit modules 141, 142 are provided for each coil group with the same circuit configuration, but the configuration of the electric circuits of the circuit modules 141, 142 is not limited to this. Other configurations will be described below.

[0088] 16 to 18 are diagrams showing the electrical connection state between the first coil module 111 and the second coil module 112 of each winding unit 110 and the first circuit module 141 and the second circuit module 142. FIG.

[0089] 16 , the electric circuit of the first circuit module 141 is connected to both ends of the second winding portion 72 in the series connection of the first winding portion 71 and the second winding portion 72, and is configured as a closed circuit (first closed circuit) that unidirectionally rectifies the current flowing through the second winding portion 72 when the stator winding 52 is energized. The electric circuit of the second circuit module 142 is connected to both ends of the series connection of the first winding portion 71 and the second winding portion 72, and is configured as a closed circuit (second closed circuit) that unidirectionally rectifies the current flowing through the series connection when the stator winding 52 is energized. As described in FIG. 4 , the first closed circuit includes a parallel diode 91 and a parallel capacitor 92. The second closed circuit includes a series diode 93 and a series capacitor 94.

[0090] According to the above configuration, in the first closed circuit connected to both ends of the second winding portion 72 and the second closed circuit connected to both ends of the series connection of the first winding portion 71 and the second winding portion 72, it is easy to individually change the electrical components used in each closed circuit, thereby improving design freedom.

[0091] In the configuration shown in FIG. 16 , for example, one winding end (second end 72 b in FIG. 4 ) of the second winding portion 72 is connected to each of the circuit modules 141, 142 on both axial sides. In this case, an axial crossover wire extending in the axial direction may be connected to the winding end (second end 72 b) of the second winding portion 72, and the first circuit module 141 side and the second circuit module 142 side may be connected by the axial crossover wire. Specifically, for example, a groove-like or hole-like crossover wire insertion portion extending in the axial direction may be provided in the holding plate 125 or the holding plate 126 shown in FIG. 7 , and the axial crossover wire may be inserted into the crossover wire insertion portion to connect the circuit modules 141, 142 on both axial sides to each other. The winding end (first end 71 a) of the first winding portion 71 may also have a similar configuration.

[0092] In Figure 16, instead of the configuration in which the first closed circuit is connected in parallel to the second winding portion 72 on the radially inner side, it is also possible to configure the first closed circuit to be connected in parallel to the first winding portion 71 on the radially outer side.

[0093] In the configuration of Fig. 17, the electric circuit of the first circuit module 141 includes the diodes 91 and 93 of the diodes 91 and 93 and the capacitors 92 and 94 that constitute the electric circuit shown in Fig. 4. Also, the electric circuit of the second circuit module 142 includes the capacitors 92 and 94 of the diodes 91 and 93 and the capacitors 92 and 94 that constitute the electric circuit shown in Fig. 4.

[0094] In the configuration of Fig. 18, the electric circuit of the first circuit module 141 includes the diodes 91 and 93 and some of the capacitors (capacitor 94) among the diodes 91 and 93 and capacitors 92 and 94 that constitute the electric circuit shown in Fig. 4. The electric circuit of the second circuit module 142 includes the remaining capacitor 92 among the diodes 91 and 93 and capacitors 92 and 94 that constitute the electric circuit shown in Fig. 4.

[0095] The electric circuit on the rotor 60 side including the first and second winding portions 71 and 72 can also be configured as follows.

[0096] In the electric circuit shown in Fig. 19, a parallel diode 91 and a parallel capacitor 92 are connected in parallel to the second winding portion 72. A parallel capacitor 95 is connected in parallel to the first winding portion 71. A series diode 93 is connected in series to the series connection of the first winding portion 71 and the second winding portion 72. In comparison with the electric circuit shown in Fig. 4, in Fig. 19, a parallel capacitor 95 is provided in parallel to the first winding portion 71 instead of the series capacitor 94 of Fig. 4.

[0097] In the electric circuit shown in Fig. 20, a parallel capacitor 92 is connected in parallel to the second winding portion 72. A series diode 93 and a series capacitor 94 are connected in series to the series connection of the first winding portion 71 and the second winding portion 72. In comparison with the electric circuit shown in Fig. 4, the parallel diode 91 of Fig. 4 is eliminated in the configuration of Fig. 19.

[0098] The electric circuit on the rotor 60 side may have a configuration other than that shown in Figures 4, 19, and 20. For example, the capacitor may be arranged in another position in parallel or series with the diodes 91, 93 and the windings 71, 72.

[0099] The amount of heat generated when current is applied differs between the circuit modules 141, 142 depending on the configuration of the electrical circuits in the circuit modules 141, 142. That is, for example, the amount of heat generated when current is applied differs between diode elements and capacitor elements. In this case, it is conceivable that the amount of heat generated when a field current flows through the field winding 70 as current is applied to the stator winding 52 differs between the circuit modules 141, 142.

[0100] In consideration of this, the first refrigerant supply unit that supplies refrigerant to the first circuit module 141 and the second refrigerant supply unit that supplies refrigerant to the second circuit module 142 may be configured to supply different amounts of refrigerant per unit time, i.e., the cooling capacities of the refrigerant supply units may be different. In this case, it is preferable that the amount of refrigerant supplied per unit time to the circuit module whose electrical components generate a greater amount of heat is greater than that of the circuit modules 141 and 142. This allows the circuit modules 141 and 142 to be properly cooled even if the heat generation amounts of the circuit modules 141 and 142 differ.

[0101] The field winding 70 is not limited to a configuration including the first winding portion 71 and the second winding portion 72. For example, the field winding 70 may be configured such that the winding portions for each main pole portion 62 are connected in series without being divided into the first and second winding portions 71, 72, and a diode is connected to both ends of the field winding 70, or a diode and a capacitor are connected in parallel.

[0102] In other words, in the above embodiment, the pole coil of each magnetic pole is configured by a winding unit 110 consisting of two coil modules (first coil module 111 and second coil module 112) for each magnetic pole, but this may be changed so that the pole coil of each magnetic pole is configured by one coil module for each magnetic pole.

[0103] In the stator 50, the stator core may not be provided with teeth.

[0104] The rotating electric machine is not limited to a rotating electric machine used as an in-vehicle main engine, but may be, for example, a rotating electric machine used as an ISG (Integrated Starter Generator) that is both a motor and a generator.

[0105] The moving body on which the rotating electric machine system is mounted is not limited to a vehicle, but may be, for example, an aircraft or a ship. Furthermore, the rotating electric machine system is not limited to a system mounted on a moving body, but may be a stationary system.

[0106] The technical concepts extracted from the above-described embodiments are described below. [Configuration 1] A wound-field rotating electric machine (40) having: a stator (50) having a stator winding (52), a rotor (60) having a rotor core (61) and a field winding (70) wound around the rotor core, and an electric circuit module (102) provided on the rotor so as to be rotatable integrally with the rotor and having electric components connected to the field winding, wherein the rotor has, as the electric circuit modules, a first circuit module (141) arranged on a first rotor end (X1) side that is one axial end of the rotor core, and a second circuit module (142) arranged on a second rotor end (X2) side that is the other axial end of the rotor core. [Configuration 2] The wound-field rotating electric machine according to Configuration 1, wherein in the rotor, the rotor core is provided with a main pole portion (62) that protrudes radially for each circumferentially arranged magnetic pole, the field winding has a plurality of pole coils (110) that are provided for each main pole portion and are formed by winding a conductive 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, and 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. [Configuration 3] The wound-field rotating electric machine according to Configuration 2, wherein the pole coils included in the first coil group have ends of the conductor material drawn to the first rotor end side and are electrically connected to the electrical components of the first circuit module at the first rotor end side, and the pole coils included in the second coil group have ends of the conductor material drawn to the second rotor end side and are electrically connected to the electrical components of the second circuit module at the second rotor end side. [Configuration 4] The wound-field rotating electric machine according to Configuration 2 or 3, wherein the rotor core has four or more and an even number of main pole portions, and the pole coils included in the first coil group and the pole coils included in the second coil group are arranged alternately in the circumferential direction on each of the main pole portions lined up in the circumferential direction of the rotor core.[Configuration 5] The wound-field rotating electric machine according to Configuration 2 or 3, wherein the rotor core has 4×n (n is an integer) main pole portions, and each of the main pole portions lined up in the circumferential direction of the rotor core has the pole coils included in the first coil group and the pole coils included in the second coil group arranged alternately in the circumferential direction by two. [Configuration 6] The wound-field rotating electric machine (40) according to any of Configurations 2 to 5, in which a high-frequency current for inducing a field current in the field winding flows in the stator winding, wherein the first circuit module and the second circuit module each have a diode (91, 93) and a capacitor (92, 94) as the electrical components, and each have an electric circuit that rectifies the field current in the first coil group and the second coil group when the stator winding is energized. [Configuration 7] A wound-field type rotating electric machine (40) in which a high-frequency current for inducing a field current in the field winding flows in the stator winding, wherein the field winding has a first winding portion (71) wound radially outward around a plurality of main pole portions (62) provided on the rotor core and a second winding portion (72) wound radially inward, the first winding portion and the second winding portion being connected in series, and the electric circuit module has: a first closed circuit connected to both ends of one of the first winding portion and the second winding portion and unidirectionally rectifying a current flowing in the one winding portion as the stator winding is energized; and a second closed circuit connected to both ends of a series connection of the first winding portion and the second winding portion and unidirectionally rectifying a current flowing in the series connection as the stator winding is energized, The wound-field rotating electric machine according to configuration 1, wherein the first circuit module is equipped with the electrical components that configure the first closed circuit, and the second circuit module is equipped with the electrical components that configure the second closed circuit. [Configuration 8] The wound-field rotating electric machine according to any of configurations 1 to 7, further comprising 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.

[0107] Although the present disclosure has been described with reference to the embodiments, it is understood that the present disclosure is not limited to the embodiments or structures. The present disclosure also encompasses various modifications and equivalent modifications. In addition, various combinations and forms, including only one element, more than one element, or less than one element, are also within the scope and spirit of the present disclosure.

Claims

1. A wound-field rotating electric machine (40) having a stator (50) with a stator winding (52), a rotor (60) having a rotor core (61) and a field winding (70) wound around the rotor core, and an electric circuit module (102) provided rotatably integrally with the rotor and having an electrical component connected to the field winding, wherein the rotor has, as the electric circuit module, a first circuit module (141) disposed on the side of a first rotor end portion (X1) which is one axial end side of the rotor core, and a second circuit module (142) disposed on the side of a second rotor end portion (X2) which is the other axial end side of the rotor core.

2. In the rotor, the rotor core is provided with main pole portions (62) protruding radially for each of the magnetic poles arranged in the circumferential direction, the field winding has a plurality of pole coils (110) provided for each of the main pole portions and wound with a conductor material, 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, a winding end portion of the first coil group is electrically connected to the electrical component of the first circuit module, and a winding end portion of the second coil group is electrically connected to the electrical component of the second circuit module. The wound-field rotating electric machine according to claim 1.

3. For the pole coils included in the first coil group, an end portion of the conductor material is drawn out to the side of the first rotor end portion and is electrically connected to the electrical component of the first circuit module on the side of the first rotor end portion, and for the pole coils included in the second coil group, an end portion of the conductor material is drawn out to the side of the second rotor end portion and is electrically connected to the electrical component of the second circuit module on the side of the second rotor end portion. The wound-field rotating electric machine according to claim 2.

4. The rotor core has 4 or more and an even number of the main pole portions, and in each of the main pole portions arranged in the circumferential direction in the rotor core, the pole coils included in the first coil group and the pole coils included in the second coil group are alternately arranged one by one in the circumferential direction. The wound-field rotating electric machine according to claim 2.

5. The rotor core has 4×n (n is an integer) of the main pole portions, and in each of the main pole portions arranged in the circumferential direction in the rotor core, the pole coils included in the first coil group and the pole coils included in the second coil group are alternately arranged two by two in the circumferential direction. The wound field type rotating electric machine according to claim 2.

6. A wound field type rotating electric machine (40) in which a high-frequency current for inducing a field current in the field winding flows through the stator winding, wherein each of the first circuit module and the second circuit module has a diode (91, 93) and a capacitor (92, 94) as the electrical components, and has an electric circuit for rectifying the field current in each of the first coil group and the second coil group when the stator winding is energized. The wound field type rotating electric machine according to any one of claims 2 to 5.

7. A wound field type rotating electric machine (40) in which a high-frequency current for inducing a field current in the field winding flows through the stator winding, wherein the field winding has a first winding portion (71) wound radially outside in a plurality of main pole portions (62) provided in the rotor core, and a second winding portion (72) wound radially inside, and the first winding portion and the second winding portion are configured to be connected in series. The electric circuit module includes a first closed circuit connected to both ends of either one of the first winding portion and the second winding portion, and rectifying the current flowing through the one winding portion in one direction as the stator winding is energized, and a second closed circuit connected to both ends of the series connection body of the first winding portion and the second winding portion, and rectifying the current flowing through the series connection body in one direction as the stator winding is energized. The first circuit module is mounted with the electrical components constituting the first closed circuit, and the second circuit module is mounted with the electrical components constituting the second closed circuit. The wound field type rotating electric machine according to claim 1.

8. The wound field type rotating electric machine according to claim 1, further comprising a first refrigerant supply unit for supplying refrigerant to the first circuit module and a second refrigerant supply unit for supplying refrigerant to the second circuit module.

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