Wound field rotor

Abstract

To hold an electric component in a proper state in a component holder.SOLUTION: A rotor includes: a rotor core; a field winding wound around the rotor core; and a circuit module 102 disposed on one axial end side of the rotor core and including an electric component connected to the field winding. The circuit module 102 has a component holder 130 for holding the electric component. The component holder 130 includes a fitting fixing part fitted and fixed relative to a rotary shaft of the rotor core with an interference, and a component accommodating part provided at a position on a radially outer side of the fitting fixing part and accommodating the electric component. In the component holder 130, a plurality of hole parts 151 and connecting parts 152 are provided between the fitting fixing part and the component accommodating part as a distortion absorbing part that absorbs distortion in a radial direction due to the interference.SELECTED DRAWING: Figure 12

Description

Technical Field

[0001] The disclosure in this specification relates to a wound-field rotor used in a wound-field type rotating electrical machine.

Background Art

[0002] In a wound-field type rotating electrical machine, the rotor has a rotor core having a plurality of main pole portions (magnetic salient pole portions) arranged in the circumferential direction, and a field winding wound around the main pole portions. Further, in the rotor, a component holder for accommodating electrical components connected to the field winding is provided, and a configuration in which the component holder is fixed in a state of being rotatable integrally with the rotor at an axial end portion of the rotor is known (see, for example, Patent Document 1).

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the rotor, in order to reduce weight imbalance, it is desirable to reliably bring the component holder into contact with the rotating shaft, and a configuration in which the component holder is fitted and fixed to the rotating shaft by press-fitting or the like with a predetermined interference fit is conceivable. However, in a configuration in which the component holder is fitted and fixed to the rotating shaft with an interference fit, distortion due to the interference fit occurs in the fitting and fixing portion of the component holder, and there is a concern that problems such as displacement or breakage of the electrical components may occur due to the distortion.

[0005] The present disclosure has been made in view of the above circumstances, and an object thereof is to provide a wound-field rotor capable of holding electrical components in an appropriate state in a component holder.

Means for Solving the Problems

[0006] The present disclosure relates to a rotor core, a field winding wound around the rotor core, a circuit module disposed on one axial end side of the rotor core and including an electrical component connected to the field winding, and a wound-field rotor having the same, wherein the circuit module has a component holder for holding the electrical component, the component holder has a fitting and fixing portion that is fitted and fixed with a margin to a rotating member that is either the shaft portion of the rotor core or an annular member that rotates integrally with the shaft portion, and a component accommodating portion that is provided at a position that is either radially outside or radially inside the fitting and fixing portion and that accommodates the electrical component, and a strain absorbing portion that absorbs radial strain due to the margin is provided between the fitting and fixing portion and the component accommodating portion in the component holder.

[0007] In a circuit module of a wound-field rotor, in a configuration in which a component holder is fitted and fixed with a margin to a rotating member that is either the shaft portion of the rotor core or an annular member that rotates integrally with the shaft portion, there is concern that the component holder may be distorted by radial stress due to the margin, and the influence of the distortion may reach the electrical component. In this regard, in the above configuration, since a strain absorbing portion that absorbs radial strain due to the margin is provided between the fitting and fixing portion and the component accommodating portion in the component holder, it is possible to suppress the influence of the distortion of the component holder from reaching the electrical component. As a result, the electrical component can be held in an appropriate state in the component holder.

Brief Description of the Drawings

[0008]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

Figure 12

Figure 13

Figure 14

Figure 15

Figure 16

Figure 17

Figure 18

Figure 19

Figure 20

Figure 21

Figure 22

Figure 23

Mode for Carrying Out the Invention

[0009] Hereinafter, an embodiment in which the rotating electrical machine according to the present disclosure is embodied will be described with reference to the drawings. The rotating electrical machine is used, for example, as a driving power source in electric vehicles such as electric automobiles and hybrid automobiles.

[0010] First, a control system including a rotating electrical 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 electrical machine 40. The rotating electrical machine 40 is a wound-field synchronous machine. For example, the rotating electrical machine 40, the inverter 20, and the control device 30 may be configured as an integrated electro-mechanical drive device, or each of the rotating electrical machine 40, the inverter 20, and the control device 30 may be composed of respective components.

[0011] The rotating electrical machine 40 includes a housing 41, a stator 50, and a rotor 60 housed in the housing 41. The rotating electrical machine 40 of the present embodiment is an inner-rotor type rotating electrical machine in which the rotor 60 is arranged radially inside the stator 50.

[0012] The stator 50 includes a stator core 51 and a stator winding 52. The stator winding 52 is composed of, for example, copper wire and includes U, V, W phase windings 52U, 52V, 52W arranged in a state of being shifted from each other by 120° in electrical angle.

[0013] The rotor 60 includes a rotor core 61 and a field winding 70. The field winding 70 may be composed of, for example, aluminum wire having a small specific gravity and being easy to form. Note that the field winding 70 is not limited to aluminum wire, and may be, for example, copper wire or CNT (carbon nanotube). A rotating shaft 32 is assembled in the central hole of the rotor core 61. The rotating shaft 32 is rotatably supported by bearings 42 and 43 in the housing 41.

[0014] As shown in FIG. 2, the inverter 20 includes a series connection of upper arm switches SUp, SVp, SWp for the U, V, and W phases and lower arm switches SUn, SVn, SWn for the U, V, and W phases. At the connection points of the upper arm switches SUp, SVp, SWp and the lower arm switches SUn, SVn, SWn in each phase, the first ends of the U, V, and W phase windings 52U, 52V, 52W are connected. The second ends of the U, V, and W phase windings 52U, 52V, 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 be delta-connected. In this embodiment, each of the switches SUp to SWn is an IGBT. A freewheel diode is connected in anti-parallel to each of the switches SUp to SWn.

[0015] The positive terminal of the DC power supply 10 is connected to the collector of the upper arm switches SUp, SVp, SWp of each phase. The negative terminal of the DC power supply 10 is connected to the emitter of the lower arm switches SUn, SVn, SWn of each phase. A smoothing capacitor 11 is connected in parallel to the DC power supply 10.

[0016] Subsequently, with reference to FIG. 3, the stator 50 and the rotor 60 will be described.

[0017] Both the stator 50 and the rotor 60 are arranged coaxially with the rotating shaft 32. In the following description, the direction in which the rotating shaft 32 extends is defined as the axial direction, the direction extending radially from the center of the rotating shaft 32 is defined as the radial direction, and the direction extending circumferentially around the rotating shaft 32 is defined as the circumferential direction.

[0018] The stator core 51 is composed of a laminated steel sheet made of a soft magnetic material, and has an annular back yoke 51a and a plurality of teeth 51b protruding radially inward from the back yoke 51a. A plurality of slots 54 arranged in the circumferential direction are formed between adjacent teeth 51b. By accommodating the phase windings of each phase in these slots 54 in a predetermined order, the stator winding 52 is constituted. For example, in the stator 50, a segment coil structure using a plurality of conductor segments may be adopted. However, the structure of the stator winding 52 is arbitrary.

[0019] The rotor core 61 is made of a soft magnetic material and is constituted by, for example, a laminated steel sheet. The rotor core 61 has a cylindrical cylindrical portion 61a and a plurality of main pole portions 62 protruding radially outward from the cylindrical portion 61a. The field winding 70 is wound around the main pole portion 62 by concentrated winding. In the present embodiment, eight main pole portions 62 are provided at equal intervals in the circumferential direction.

[0020] The field winding 70 includes a first winding portion 71a and a second winding portion 71b. The first winding portion 71a is wound around each main pole portion 62 on the radially outer side, and the second winding portion 71b is wound around the radially inner side of the first winding portion 71a. In each main pole portion 62, the winding directions of the first winding portion 71a and the second winding portion 71b are the same as each other. Also, among the main pole portions 62 adjacent to each other in the circumferential direction, the winding directions of the winding portions 71a and 71b wound around one are opposite to the winding directions of the winding portions 71a and 71b wound around the other. For this reason, the magnetization directions of the main pole portions 62 adjacent to each other in the circumferential direction are opposite to each other. In the rotor 60, a plurality of magnetic poles (field poles) arranged in the circumferential direction are formed by each main pole portion 62 in the rotor core 61 and the field winding 70 wound around each main pole portion 62.

[0021] FIG. 4 shows the electric circuit on the rotor 60 side including the winding portions 71a and 71b wound around the main pole portion 62. The first winding portion 71a and the second winding portion 71b are connected in series, and a capacitor portion CC composed of a plurality of first capacitors 91 is connected in parallel to the second winding portion 71b. In the present embodiment, the capacitor portion CC is configured as a parallel connection body of, for example, 11 first capacitors 91. Further, a second capacitor 92 is connected in parallel to the series connection body of the first winding portion 71a and the second winding portion 71b. The second capacitor 92 is provided for noise suppression. In the present embodiment, one second capacitor 92 is provided. The first capacitor 91 and the second capacitor 92 are, for example, multilayer ceramic capacitors and have the same configuration as each other.

[0022] A diode 93 as a rectifying element is connected between both ends of the series connection body composed of the winding portions 71a and 71b. That is, the first end of the first winding portion 71a is connected to the cathode of the diode 93, and the first end of the second winding portion 71b is connected to the second end of the first winding portion 71a. The anode of the diode 93 is connected to the second end of the second winding portion 71b.

[0023] In the present embodiment, a series resonance circuit is configured by the first winding portion 71a, the first capacitor 91, and the diode 93, and a parallel resonance circuit is configured by the second winding portion 71b and the first capacitor 91. Let the first resonance frequency, which is the resonance frequency of the series resonance circuit, be f1, and the second resonance frequency, which is the resonance frequency of the parallel resonance circuit, be f2. These resonance frequencies f1 and f2 are represented by the following formulas (1) and (2). L1 is the inductance of the first winding portion 71a, L2 is the inductance of the second winding portion 71b, and C is the capacitance of the first capacitor 91. f1 = 1 / (2π√(L1×C)) …(1) f2 = 1 / (2π√(L2×C)) …(2) When a high-frequency exciting current flows through the stator winding 52, fluctuations due to the high-frequency component of the main magnetic flux occur in the magnetic circuit including the stator core 51 and the rotor core 61. When fluctuations in the main magnetic flux occur, induced voltages are generated in the respective winding portions 71a and 71b, and currents are induced in the respective winding portions 71a and 71b. When induced voltages with the same polarity are generated in the respective winding portions 71a and 71b, the induced currents in the respective winding portions 71a and 71b are not canceled out, so the induced current increases. Also, the diode 93 rectifies the current flowing through the respective winding portions 71a and 71b in one direction. As a result, a field current flows through the field winding 70 in the direction rectified by the diode 93, and the field winding 70 is excited.

[0024] Returning to the description of FIG. 2, the control device 30 is mainly composed of a microcomputer (equivalent to a computer), and the microcomputer includes a processor and a memory. The control device 30 generates drive signals for turning on and off the switches SUp to SWn that constitute the inverter 20. Specifically, the control device 30 generates drive signals for turning on and off the switches SUp to SWn in order to convert the DC power output from the DC power supply 10 into AC power and supply it to the U, V, W phase windings 52U, 52V, 52W, and supplies the generated drive signals to the gates of the switches SUp to SWn.

[0025] The control device 30 turns on and off the switches SUp to SWn so that a combined current of the fundamental wave current and the high-frequency exciting current flows through the respective phase windings 52U, 52V, 52W. The fundamental wave current is mainly a current that generates torque in the rotating electrical machine 40. The high-frequency exciting current is a high-frequency current having a higher frequency than the fundamental wave current, and is mainly a current that excites the field winding 70. It is also possible to use a harmonic current as the high-frequency current. The phase currents flowing through the respective phase windings 52U, 52V, 52W are shifted by 120° in electrical angle.

[0026] Next, the configuration of the rotor 60 will be described in more detail. FIG. 5 is a perspective view showing the overall configuration of the rotor 60, FIG. 6 is an exploded perspective view of the rotor 60, and FIG. 7 is a longitudinal sectional view of the rotor 60.

[0027] The rotor 60 is roughly divided into a main rotor part 101, a circuit module 102 provided at one end side of both axial ends of the main rotor part 101, and coil end covers 103 and 104 as annular members attached to one axial end side and the other axial end side of the main rotor part 101. The main rotor part 101 includes a rotor core 61 and a field winding 70 as described with reference to FIG. 3, and a rotating shaft 32 is assembled in the central hole of the rotor core 61. The field winding 70 is composed of a plurality of winding units 110 arranged side by side in the circumferential direction. The circuit module 102 is fixed to the rotating shaft 32 with the rotating shaft 32 inserted through the hollow part. As shown in FIG. 7, in the field winding 70 (winding unit 110), the portion facing the rotor core 61 in the radial direction is the coil side part CS, and the portion outside the rotor core 61 in the axial direction is the coil end part CE. The circuit module 102 is provided at a position axially opposed to the coil end part CE of the field winding 70.

[0028] FIG. 8 is a perspective view showing the winding unit 110 disassembled in the main rotor part 101, and FIG. 9 is a cross-sectional view showing the cross-sectional structure of a part of the main rotor part 101. The main rotor part 101 has a plurality of winding units 110 provided for each 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 part 62 of the rotor core 61 inserted through the hollow part thereof.

[0029] The winding unit 110 has a first coil module 111 on the outer side in the radial direction and a second coil module 112 on the inner side in the radial direction in a state of being mounted on the main pole part 62. The first coil module 111 is a coil module corresponding to the first winding part 71a, and the second coil module 112 is a coil module corresponding to the second winding part 71b.

[0030] The first coil module 111 includes an annular coil body 121 formed by winding a flat wire conductor multiple times in the circumferential and radial directions, and a thin plate-shaped insulator 122 integrally provided on the coil body 121. The insulator 122 has a portion extending in the circumferential direction and covering the outer and inner peripheral portions of the coil body 121 in the radial direction, and a portion extending in the radial direction and covering the hollow portion of the coil body 121. That is, the outer peripheral portion on the outer side in the radial direction, the inner peripheral portion on the inner side in the radial direction, and the hollow portion of the coil body 121 are insulated and covered by the insulator 122.

[0031] The second coil module 112 includes an annular coil body 123 formed by winding a flat wire conductor multiple times in the circumferential and radial directions, and a thin plate-shaped insulator 124 integrally provided on the coil body 123. The insulator 124 has a portion extending in the circumferential direction and covering the outer and inner peripheral portions of the coil body 123 in the radial direction, and a portion extending in the radial direction and covering the hollow portion of the coil body 123. That is, the outer peripheral portion on the outer side in the radial direction, the inner peripheral portion on the inner side in the radial direction, and the hollow portion of the coil body 123 are insulated and covered by the insulator 124.

[0032] The coil bodies 121 and 123 are air-core coils configured as, for example, α-wound coils. The flat wire used for the coil bodies 121 and 123 has a substantially rectangular cross-sectional shape (specifically, a substantially rectangular shape), and the flat wire 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 wire.

[0033] As shown in FIG. 9, in the first coil module 111, the conductor wire is wound in two layers in the radial direction, and in the second coil module 112, the conductor wire is wound in six layers in the radial direction. Also, in each of the coil modules 111 and 112, the number of winding turns in the circumferential direction (in other words, the number of arrangements of the conductor wires in the circumferential direction) is different, and the number of winding turns is larger on the outer side in the radial direction than on the inner side in the radial direction. Thereby, an improvement in the space factor of the field winding 70 is achieved. If the space factor is disregarded, it is also possible to make the number of winding turns in the circumferential direction the same for each of the coil bodies 121 and 123 arranged in the radial direction.

[0034] Further, in the main rotor part 101, between the main pole parts 62 of the rotor core 61, holding plates 125 and 126 for holding the assembled states of the first coil module 111 and the second coil module 112 are provided in a state where the first coil module 111 and the second coil module 112 are assembled to each main pole part 62. The holding plate 125 is attached to the outer side in the radial direction 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.

[0035] As shown in FIG. 6, the rotor 60 has a coil end ring 81 assembled to the axial end of the winding unit 110. As shown in FIG. 7, the coil end ring 81 is provided between the coil end parts of the first coil module 111 and the second coil module 112 in the radial direction and is sandwiched between the holding plate 126 and the coil end cover 103 in the axial direction.

[0036] Next, the circuit module 102 will be described. FIG. 10 is a perspective view of the circuit module 102, and FIG. 11 is a perspective view of the component holder 130 constituting the circuit module 102.

[0037] The circuit module 102 includes a first capacitor 91, a second capacitor 92, a diode 93, a component holder 130, and a plurality of bus bars 147. The component holder 130 is made of a material having electrical insulation properties, specifically, a resin molded body made of a resin material.

[0038] As shown in FIG. 11, the component holder 130 includes an annular main body portion 131. The main body portion 131 includes a bottom plate portion 132 that extends in the radial direction and has an annular shape, an outer peripheral wall portion 133 that extends in the axial direction from the radially outer end of the bottom plate portion 132, and an inner peripheral wall portion 134 that extends in the axial direction from the radially inner end of the bottom plate portion 132. The inner peripheral wall portion 134 is continuously formed in an annular shape in the circumferential direction, while the outer peripheral wall portion 133 is provided at a portion excluding a part in the circumferential direction. Further, the main body portion 131 includes side wall portions 135 that extend in the radial direction between the outer peripheral wall portion 133 and the inner peripheral wall portion 134 at positions that are both ends in the circumferential direction of the outer peripheral wall portion 133.

[0039] In the main body portion 131, a first accommodating portion 136, which is a C-shaped space, is formed by the bottom plate portion 132 and the respective wall portions 133 to 135, and capacitors 91 and 92 as electrical components are accommodated in the first accommodating portion 136. Note that, among the above spaces, a partition portion 137 that partitions the accommodating space of the first capacitor 91 and the space of the second capacitor 92 is formed to extend in the axial direction from the bottom plate portion 132.

[0040] A central hole 141 through which the rotating shaft 32 is inserted is formed in the main body portion 131. Specifically, the central hole 141 is formed by the inner peripheral surface 134a of the inner peripheral wall portion 134. The component holder 130 is configured to be assembled to the rotating shaft 32 with the rotating shaft 32 inserted through the central hole 141 (see FIG. 7).

[0041] The inner peripheral wall portion 134 of the main body portion 131 is fitted and fixed to the rotating shaft 32 with a predetermined interference fit. Specifically, the inner peripheral surface 134a of the inner peripheral wall portion 134 is fitted and fixed to the rotating shaft 32 by press-fitting. However, instead of press-fitting, methods such as shrink fitting or expansion fitting can also be used. In the component holder 130, the inner peripheral surface 134a of the inner peripheral wall portion 134 corresponds to the "fitting and fixing portion". The first accommodating portion 136 is provided at a position radially outside the inner peripheral surface 134a so as to surround the inner peripheral surface 134a of the inner peripheral wall portion 134.

[0042] In addition, the component holder 130 includes a second accommodation portion 142 in which a diode 93 as an electrical component is accommodated. The second accommodation portion 142 is provided radially outside the inner peripheral wall portion 134 at a position where the outer peripheral wall portion 133 is not provided in the circumferential direction. The diode 93 is fixed to the second accommodation portion 142 by a fixture such as a bolt. In the present embodiment, the first accommodation portion 136 and the second accommodation portion 142 correspond to the "component accommodation portion".

[0043] The component holder 130 includes a plurality of winding fixing portions 145 that protrude radially outward from the main body portion 131. In the present embodiment, the number of winding fixing portions 145 provided is the same as the number of main pole portions 62. Specifically, eight winding fixing portions 145 are provided at equal intervals in the circumferential direction. Each winding fixing portion 145 extends radially outward from an intermediate position in the axial direction of the outer peripheral wall portion 133.

[0044] A plurality of through holes 146 penetrating in the axial direction are formed in each winding fixing portion 145. As shown in FIG. 8, in the rotor main body 101, in each winding unit 110, two conductor end portions 127 are drawn out from the axial end portion of the first coil module 111, and six conductor end portions 128 are drawn out from the axial end portion of the second coil module 112. In the first coil module 111, since the first winding portion 71a is constituted by one air-core coil, two conductor end portions 127 are drawn out. In the second coil module 112, since the second winding portion 71b is constituted by three air-core coils arranged in the radial direction, six conductor end portions 128 are drawn out.

[0045] Then, with the conductor end portions 127 of two adjacent first coil modules 111 in the circumferential direction inserted into the through holes 146 one by one, the conductor end portions 127 are connected to each other by welding or the like, so that the first coil modules 111 in the circumferential direction are connected in series. Also, with the conductor end portions 128 of two adjacent second coil modules 112 in the circumferential direction inserted into the through holes 146 one by one, the conductor end portions 128 are connected to each other by welding or the like, so that the second coil modules 112 in the circumferential direction are connected in series.

[0046] In each winding fixing portion 145, it is preferable that the leading ends 127 and 128 of the conducting wires are fixed to the winding fixing portion 145 with the leading ends 127 and 128 of the conducting wires inserted into the through holes 146. For example, it is preferable that the leading ends 127 and 128 of the conducting wires are fixed by a molding resin or an adhesive in the through holes 146.

[0047] In the first accommodating portion 136 of the component holder 130, the first capacitor 91 and the second capacitor 92 are arranged side by side in the circumferential direction. Further, a bus bar 147 is connected to each of the capacitors 91 and 92, and the capacitors 91 and the like and the field winding 70 are electrically connected via the bus bar 147.

[0048] By the way, in a configuration in which the component holder 130 is fitted and fixed to the rotating shaft 32 with a clearance in the circuit module 102, distortion due to the clearance occurs around the inner peripheral surface 134a in the component holder 130, and due to this distortion, there is a concern that problems such as displacement or breakage of the capacitor 91 or the like may occur.

[0049] Therefore, in the present embodiment, a distortion absorbing portion for absorbing the radial distortion due to the clearance is provided on the inner peripheral wall portion 134 of the component holder 130 (that is, between the inner peripheral surface 134a of the inner peripheral wall portion 134 and the accommodating portions 136 and 142). And with this configuration, it is possible to suppress the influence on the capacitor 91 or the like due to the distortion of the component holder 130, and the capacitor 91 or the like is held in an appropriate state. The specific configuration thereof will be described below.

[0050] FIG. 12 is a plan view of the circuit module 102. FIG. 13 is a longitudinal sectional view showing a cross section of the circuit module 102 taken along line 13-13 in FIG. 12.

[0051] In the component holder 130, a plurality of holes 151 that are arranged in the circumferential direction and each penetrate in the axial direction are provided in the inner peripheral wall portion 134, and connecting portions 152 are provided between the holes 151 adjacent to each other in the circumferential direction. That is, in the inner peripheral wall portion 134, the holes 151 and the connecting portions 152 are alternately provided in the circumferential direction. Further, in the inner peripheral wall portion 134, the radially inner side (inner peripheral surface 134a side) of each of the holes 151 arranged in the circumferential direction is an inner annular portion 153, and the radially outer side (opposite side of the inner peripheral surface 134a) of each of the holes 151 is an outer annular portion 154. In the component holder 130, the plurality of holes 151 and the connecting portions 152 provided between the inner peripheral surface 134a of the inner peripheral wall portion 134 and the respective accommodating portions 136 and 142 correspond to a "strain absorbing portion".

[0052] The connecting portion 152 is a portion that is narrowed in the circumferential direction by being sandwiched by the holes 151 on both circumferential sides, and is a low-rigidity connecting portion having a lower connection rigidity than a configuration in which the holes 151 are not provided.

[0053] The hole 151 is formed of a long hole extending in the circumferential direction and has an arcuate shape in plan view. Each hole 151 has the same length dimension in the circumferential direction and is provided at predetermined intervals in the circumferential direction. Further, the connecting portion 152 is provided so as to extend in the radial direction between the inner annular portion 153 and the outer annular portion 154. The width dimension of the connecting portion 152 in the circumferential direction is shorter than the length dimension of the hole 151 in the circumferential direction. However, the width dimension of the connecting portion 152 in the circumferential direction may be the same as the length dimension of the hole 151 in the circumferential direction, or may be longer than the length dimension of the hole 151 in the circumferential direction. The hole 151 does not have to be a long hole. Further, in the component holder 130, the number of the holes 151 and the connecting portions 152 is not limited to that shown in the figure and can be changed.

[0054] In the configurations of FIGS. 12 and 13, when radial strain occurs in the component holder 130 by press-fitting, the strain is absorbed by the holes 151 and the connecting portions 152 arranged alternately in the circumferential direction. As a result, the transmission of strain from the inner peripheral surface 134a (fitting and fixing portion) side to the side of the capacitor 91 or the like in the component holder 130 is reduced, and thus the electrical components such as the capacitor 91 can be properly protected.

[0055] In the first accommodating portion 136 of the component holder 130, electrical components such as the capacitors 91 are covered with a resin encapsulant. Specifically, as shown in FIG. 6, the first accommodating portion 136 of the component holder 130 is filled with a resin material, and a resin molded portion 138 is formed. The resin material is a thermosetting resin such as, for example, an epoxy resin. Each of the capacitors 91, 92 is in a state of being embedded in the resin molded portion 138 in the first accommodating portion 136. Note that the capacitors 91 etc. only need to have at least a part thereof covered with the resin material in the first accommodating portion 136.

[0056] The elastic modulus of the resin material of the resin molded portion 138 is higher than the elastic modulus of the resin material constituting the component holder 130. In this case, the strain due to press-fitting is transmitted to the component holder 130 but is less likely to be transmitted to the electrical components. Thereby, the electrical components can be protected.

[0057] Also, in the component holder 130, as described above, a plurality of winding fixing portions 145 are provided on the radially outer side of the first accommodating portion 136, and the conductor end portions 127, 128 extending axially from the field winding 70 are fixed to the through holes 146 of the respective winding fixing portions 145. FIG. 14 shows the connection structure of the conductor end portions 127, 128 in the winding fixing portion 145.

[0058] FIG. 14 shows two through holes 146 in the winding fixing portion 145. The conductor end portion 127 is fixed to one of the through holes 146, and the conductor end portion 128 and the end portion of a bus bar 129 electrically connected to the conductor end portion 128 are fixed to the other through hole 146. Note that the bus bar 129 may be a relay bus bar that connects the winding end portions to the capacitors 91, 92 and the diodes 93. In the component holder 130, only the conductor end portions 127, 128 may be fixed to the through holes 146 of the winding fixing portion 145, or only the bus bar 129 may be fixed.

[0059] As described above, in the configuration in which the strain absorbing portion is provided on the inner peripheral wall portion 134 of the component holder 130, it is conceivable that the component holder 130 becomes more likely to vibrate due to the reduction in rigidity in the strain absorbing portion. As a countermeasure, in the component holder 130, on the radially outer side of the first accommodating portion 136, that is, on the side opposite to the inner peripheral surface 134a (fitting and fixing portion) across the first accommodating portion 136 in the radial direction, the conductor end portions 127 and 128 and the bus bar 129 are fixed to the winding fixing portion 145 in a state of being inserted through the through hole 146. In this case, in the component holder 130, vibration reduction can be achieved by fixing the winding on the radially outer side of the first accommodating portion 136.

[0060] A part of the configurations of FIGS. 12 and 13 may be changed as follows.

[0061] FIG. 15 is a plan view of the component holder 130. In the configuration of FIG. 15, the connecting portion 152 is an inclined connecting portion that inclines with respect to the radiation LA extending linearly in the radial direction from the rotation center of the rotor 60 (center point CP of the rotation shaft 32) in the plan view of the component holder 130. Specifically, the connecting portion 152 is such that the center line LB in the plan view is inclined with respect to the radiation LA while extending linearly between the inner annular portion 153 and the outer annular portion 154 of the inner peripheral wall portion 134. The plurality of connecting portions 152 in the circumferential direction are all inclined in the same direction in the circumferential direction. In this configuration, by providing each connecting portion 152 so as to extend in a direction inclined with respect to the radiation LA, the effect of strain absorption in the radial direction can be enhanced. Note that the connecting portions 152 may include those having different inclination directions from each other, for example, the inclination directions may alternate in the circumferential direction.

[0062] Also, in the configuration of FIG. 16, the connecting portion 152 is a bent connecting portion having a bent shape in the plan view of the component holder 130. Specifically, the connecting portion 152 has two inclined portions that are opposite to each other with respect to the radiation LA between the inner annular portion 153 and the outer annular portion 154 of the inner peripheral wall portion 134, and has a substantially L-shaped bent shape. The bending directions of the respective connecting portions 152 may all be the same in the circumferential direction, or may include those different in the circumferential direction.

[0063] Since the connecting portion 152 is formed in a bent shape, the effect of absorbing strain in the radial direction can be enhanced. Further, in the configuration where the connecting portion 152 has a bent shape, rotation in the circumferential direction can be suppressed on the outer side in the radial direction of the connecting portion 152 as compared with the configuration where the connecting portion 152 has a straight inclined shape (the configuration of FIG. 15).

[0064] FIG. 17 is a plan view of the circuit module 102. Note that FIG. 17 is a drawing showing the circuit module 102 shown in FIG. 12 with the bus bar 147 on the front side of the paper surface removed, and the circumferential arrangement of the capacitors 91 and 92 and the diode 93, which are electrical components, is shown in the figure.

[0065] In the configuration of FIG. 17, a plurality of the electrical components (capacitors 91 and 92 and diode 93) are accommodated side by side in the circumferential direction in each of the accommodating portions 136 and 142, and the existing portions where the electrical components are present and the non-existing portions where the electrical components are not present are arranged alternately in the circumferential direction. On the other hand, in the configuration where the hole portions 151 and the connecting portions 152 are alternately provided in the circumferential direction on the inner peripheral wall portion 134 of the component holder 130, although the transmission of strain itself is reduced when strain due to the tightening margin occurs, it is considered that the strain is somewhat transmitted in the radial direction. In this case, there is a difference in the transmission of strain in the radial direction between the hole portion 151 and the connecting portion 152, and the degree of transmission of strain is greater in the connecting portion 152.

[0066] In consideration of this point, in FIG. 17, in the component holder 130, the connecting portion 152 is provided at a position corresponding to the non-existing portion among the existing portion where the electrical component is present and the non-existing portion where the electrical component is not present. Thereby, the influence of strain on the electrical component can be further reduced.

[0067] Another configuration of the strain absorbing portion in the component holder 130 will be described below. The points of change with respect to the above configuration will be described below.

[0068] FIG. 18 is a plan view of the component holder 130. FIG. 19 is a longitudinal sectional view showing a cross section of the component holder 130 along line 19-19 of FIG. 18.

[0069] In FIGS. 18 and 19, an annular groove portion 161 is provided on the inner peripheral wall portion 134 of the component holder 130, which opens to one side of the end faces on both axial sides and extends in the circumferential direction. And in the inner peripheral wall portion 134, the portion that becomes thin in the axial direction due to the annular groove portion 161 is the thin wall portion 162. The annular groove portion 161 opens to the side opposite to the bottom plate portion 132 (the upper side in FIG. 19) of the end faces on both axial sides of the component holder 130. Thereby, in the component holder 130, the thin wall portion 162 is provided at a position radially continuous with the bottom plate portion 132. The thin wall portion 162 is preferably thinner than the bottom plate portion 132. In this configuration, the annular groove portion 161 and the thin wall portion 162 correspond to a "strain absorption portion". The thin wall portion 162 is a portion that becomes thin due to the annular groove portion 161 in the axial direction, and is a low-rigidity connection portion having a lower connection rigidity than a configuration in which the annular groove portion 161 is not provided.

[0070] Since the annular groove portion 161 is provided on the inner peripheral wall portion 134 of the component holder 130, the thin wall portion 162 formed by the annular groove portion 161 has low rigidity. In this case, the thin wall portion 162 can preferably absorb the strain generated by the press-fitting of the inner peripheral wall portion 134. The configuration of FIGS. 18 and 19 is less likely to reduce the circumferential rigidity in the strain absorption portion compared to a configuration in which a hole (hole portion) is provided between the inner peripheral surface 134a, which is a fitting and fixing portion, and each accommodating portion 136, 142, and has a structure that is strong against the load generated by rotational fluctuations.

[0071] Note that in the configuration shown in FIG. 19, the annular groove portion 161 is provided by opening it to the side opposite to the bottom plate portion 132 of the end faces on both axial sides of the inner peripheral wall portion 134, but this can be changed, and the annular groove portion 161 may be provided by opening it to the side of the bottom plate portion 132. Alternatively, the annular groove portion 161 may be provided by opening it to the end faces on both axial sides of the inner peripheral wall portion 134.

[0072] In FIG. 20, in the inner peripheral wall portion 134, annular groove portions 161A and 161B are provided by opening both end faces in the axial direction, and a thin-walled portion 162 is provided between the annular groove portions 161A and 161B on both sides in the axial direction. Further, the thin-walled portion 162 is provided so as to extend in a direction inclined with respect to the direction orthogonal to the axial direction.

[0073] In this case, the thin-walled portion 162 has low rigidity due to its thin wall, and further, since it is inclined with respect to the direction orthogonal to the axial direction, shrinkage deformation in the radial direction is facilitated. Thereby, the distortion generated by press-fitting or the like of the inner peripheral wall portion 134 can be preferably absorbed.

[0074] In FIG. 21, in the component holder 130 which is a resin molded body, a metal ring body 171 having higher rigidity than the resin material is insert-molded on the side of the rotary shaft 32 rather than the strain absorbing portion (for example, the connecting portion 152). The ring body 171 is, for example, a cylindrical body made of aluminum. In this configuration, the ring body 171 serves as a fitting and fixing portion in the component holder 130, and this ring body 171 is fitted and fixed to the rotary shaft 32 with an interference fit. In this case, by making the component holder 130 a resin molded body molded from a resin having a lower longitudinal elastic modulus (Young's modulus) than the ring body 171, the transmission of the distortion due to the interference fit to the resin portion is suppressed, and the generation of distortion in the resin portion in the component holder 130 is suppressed.

[0075] As a measure for reducing vibration in the configuration in which the component holder 130 is provided with a strain absorbing portion, a configuration in which a metal reinforcing member is provided in the vicinity of each accommodating portion 136 and 142 of the component holder 130 may be adopted. Specifically, as shown in FIG. 22, it is preferable to integrally provide a reinforcing member 172 extending annularly around the rotary shaft 32 at a portion surrounding the first accommodating portion 136 in the component holder 130. The reinforcing member 172 is a metal reinforcing member and is made of, for example, a metal plate such as aluminum. The reinforcing member 172 is embedded in the bottom plate portion 132 in a direction with the plate surface as the axial direction. In this case, the portion surrounding the first accommodating portion 136 in the component holder 130 is seismically reinforced, and the influence of vibration on the electrical component is reduced.

[0076] In addition, as a configuration of metal reinforcement in the vicinity of the first accommodation portion 136 of the component holder 130, a configuration of metal-reinforcing the outer peripheral wall portion 133, or a configuration of metal-reinforcing the outer annular portion 154 radially outside the hole portion 151, the annular groove portion 161, etc. in the inner peripheral wall portion 134 may be adopted.

[0077] In the component holder 130, in a configuration where the capacitors 91 and 92 and the diodes 93 are accommodated side by side in the circumferential direction as electrical components, it is conceivable that the degree of influence of distortion due to the tightening allowance differs between the capacitors 91 and 92 and the diodes 93. Considering this point, in the component holder 130, a configuration may be adopted in which the degree of distortion absorption in the distortion absorption portion differs between the circumferential position corresponding to the capacitors 91 and 92 and the circumferential position corresponding to the diodes 93.

[0078] Specifically, a configuration shown in FIG. 23 may be adopted. FIG. 23 schematically shows the configuration of the circuit module 102. In FIG. 23, an annular component accommodation portion 136 is provided in the component holder 130, and four capacitors 91 and two diodes 93 are arranged side by side in the circumferential direction in the component accommodation portion 136. For example, the two diodes 93 are arranged on the opposite side (180° opposite side) with the rotor center point interposed therebetween.

[0079] Then, among the thin-walled portions 162 provided in an annular shape as the distortion absorption portion, a thin-walled portion 162A is provided at the circumferential position corresponding to the capacitors 91 and 92, that is, at the position radially inside the capacitors 91 and 92, and a thin-walled portion 162B is provided at the circumferential position corresponding to the diodes 93, that is, at the position radially inside the diodes 93. The thin-walled portions 162A and 162B have different axial thickness dimensions, and "the thickness dimension T1 of the thin-walled portion 162A < the thickness dimension T2 of the thin-walled portion 162B". In this case, in the thin-walled portion 162A, the degree of distortion absorption is larger than that in the thin-walled portion 162B, and the influence of distortion in the capacitors 91 and 92 is preferentially reduced. Also, the strength can be increased in the thin-walled portion 162B. However, "the thickness dimension T1 of the thin-walled portion 162A > the thickness dimension T2 of the thin-walled portion 162B" may also be possible.

[0080] In the configuration of FIG. 23, while imparting appropriate strength to the strain absorbing portion of the component holder 130, the influence of strain on the electrical components can be appropriately reduced.

[0081] In FIG. 23, a configuration may be adopted in which a hole portion 151 and a connecting portion 152 are provided as the strain absorbing portion. In such a configuration, the circumferential width dimension of the connecting portion 152 may be changed at the position corresponding to the capacitors 91 and 92 and the position corresponding to the diode 93. For example, the width dimension of the connecting portion 152 may be relatively reduced at the position corresponding to the capacitors 91 and 92, and the width dimension of the connecting portion 152 may be relatively increased at the position corresponding to the diode 93. However, the reverse may also be possible.

[0082] The configurations of the above-described respective figures can also be implemented by appropriately combining them. For example, a configuration in which a plurality of hole portions 151 and connecting portions 152 are provided as strain absorbing portions on the inner peripheral wall portion 134 (see FIGS. 12, 13, 15 to 17) and a configuration in which an annular groove portion 161 and a thin wall portion 162 are provided as strain absorbing portions on the inner peripheral wall portion 134 (see FIGS. 18 to 20) can be combined. Specifically, as shown in FIGS. 18 to 20, a configuration may be adopted in which the thin wall portion 162 is formed by the annular groove portion 161 provided on at least one of the end faces on both axial sides of the component holder 130, and further, a plurality of hole portions 151 penetrating in the axial direction are provided in the thin wall portion 162 extending in the circumferential direction. The plurality of hole portions 151 provided in the thin wall portion 162 may be provided in any of the forms shown in FIGS. 12, 15 to 17. In this case, the inner peripheral wall portion 134 has a configuration in which a connecting portion 152 having an axial thickness dimension smaller than those of the inner annular portion 153 and the outer annular portion 154 is provided as the strain absorbing portion. In this configuration, the circumferential width dimension of the connecting portion 152 may be longer than the circumferential length dimension of the hole portion 151.

[0083] <Other Embodiments> The above embodiments may be modified as follows, for example.

[0084] · In the above-described embodiment, in the rotor 60, the inner peripheral side of the component holder 130, that is, the inner peripheral surface 134a of the inner peripheral wall portion 134, is used as the fitting and fixing portion, and the inner peripheral surface 134a is fitted and fixed to the rotating shaft 32 by press-fitting or the like. However, this configuration may be changed. In the rotor 60, the outer peripheral side of the component holder 130, that is, the outer peripheral surface of the outer peripheral wall portion 133, may be used as the fitting and fixing portion. For example, a configuration may be adopted in which the outer peripheral surface of the outer peripheral wall portion 133 is fitted and fixed to the inner peripheral side of the coil end cover 103 (see FIGS. 5 and 6) that rotates integrally with the rotating shaft 32 by press-fitting or the like. In this case, the coil end cover 103 as an annular member corresponds to the "rotating member" to be fitted and fixed. In this configuration, in the component holder 130, a component accommodating portion is provided at a position radially inward with respect to the outer peripheral surface of the outer peripheral wall portion 133, and a strain absorbing portion is preferably provided between the outer peripheral surface of the outer peripheral wall portion 133 and the component accommodating portion.

[0085] · The configuration of the field winding 70 may be other than the above. For example, in the first coil module 111 of the field winding 70, a configuration may be adopted in which one end of the conductor is wound first and the other end is wound last, and the conductor is continuously wound in two layers in the radial direction. Further, in the second coil module 112, a configuration may be adopted in which one end of the conductor is wound first and the other end is wound last, and the conductor is continuously wound in six layers in the radial direction.

[0086] · The first capacitor 91 constituting the resonance circuit may be connected in parallel to the first winding portion 71a instead of the second winding portion 71b. Further, in the resonance circuit, among the series connection bodies of the first and second winding portions 71a and 71b, the anode of the diode 93 may be connected to the first winding portion 71a side, and the cathode of the diode 93 may be connected to the second winding portion 71b side.

[0087] · In the rotor 60, the second winding portion 71b may be disposed radially outside (on the stator 50 side) of the first winding portion 71a.

[0088] · In the stator 50, the stator core may be a stator core provided without teeth.

[0089] ·As the rotating electrical machine, it is not limited to the rotating electrical machine used as the in-vehicle main machine. For example, it may be a rotating electrical machine used as an ISG (Integrated Starter Generator) which is both a motor and a generator.

[0090] ·As the moving body on which the rotating electrical machine system is mounted, it is not limited to a vehicle. For example, it may be an aircraft or a ship. Further, the rotating electrical machine system is not limited to the system mounted on the moving body, and may be a stationary system.

[0091] The technical idea extracted from the above-described embodiment is described below. [Configuration 1] A rotor core (61), A field winding (70) wound around the rotor core, A circuit module (102) disposed on one end side in the axial direction of the rotor core and including an electrical component connected to the field winding, A wound-field rotor (60) having: The circuit module has a component holder (130) for holding the electrical component, The component holder, A fitting and fixing portion (134a) that is fitted and fixed with a margin to a rotating member that is either the shaft portion (32) of the rotor core or an annular member that rotates integrally with the shaft portion, A component accommodating portion (136, 142) that is provided at a position that is either radially outside or radially inside the fitting and fixing portion and that accommodates the electrical component, and A wound-field rotor in which a strain absorbing portion (152, 162) for absorbing radial strain due to the margin is provided between the fitting and fixing portion and the component accommodating portion in the component holder. [Configuration 2] In the component holder, as the strain absorbing portion, a plurality of hole portions (151) that are arranged in the circumferential direction and each penetrate in the axial direction, and a connecting portion (152) that is located between the adjacent hole portions in the circumferential direction and extends in the radial direction are provided. The wound-field rotor according to Configuration 1. [Configuration 3] The connecting portion is an inclined connecting portion that inclines with respect to a radiation that linearly extends radially from the center point of the shaft portion in a plan view of the component holder, the wound field magnet rotor according to Configuration 2. [Configuration 4] The connecting portion is a bent connecting portion that forms a bent shape in a plan view of the component holder, the wound field magnet rotor according to Configuration 2. [Configuration 5] A plurality of the electrical components are accommodated side by side in the circumferential direction in the component accommodating portion, The component accommodating portion has a presence site where the electrical component exists and an absent site where the electrical component does not exist in the circumferential direction, The connecting portion is provided at a position corresponding to the absent site among the presence site and the absent site in the circumferential direction on the component holder, the wound field magnet rotor according to any one of Configurations 2 to 4. [Configuration 6] An annular groove portion (161) that opens to at least one of the end faces on both axial sides of the component holder and extends in the circumferential direction is provided between the fitting and fixing portion and the component accommodating portion in the component holder, and a thin portion (162) that is thin in the axial direction due to the annular groove portion serves as the distortion absorbing portion, the wound field magnet rotor according to Configuration 1. [Configuration 7] An annular groove portion (161) that opens to the axial end faces and extends in the circumferential direction is provided on both axial sides of the component holder between the fitting and fixing portion and the component accommodating portion, and a thin portion (162) between the annular groove portions on both axial sides serves as the distortion absorbing portion, The thin portion is provided so as to extend in a direction inclined with respect to a direction orthogonal to the axial direction between the fitting and fixing portion and the component accommodating portion, the wound field magnet rotor according to Configuration 1. [Configuration 8] A capacitor (91, 92) and a diode (93) are accommodated side by side in the circumferential direction as the electrical components in the component accommodating portion, In the component holder, the degree of strain absorption in the strain absorption portion is different between the circumferential position corresponding to the capacitor and the circumferential position corresponding to the diode, and the wound field magnetic rotor according to any one of Configurations 1 to 7. [Configuration 9] The component holder is a resin molded body, In the component holder, a metal ring body (171) is insert-molded on the side of the rotating member of the strain absorption portion, and the wound field magnetic rotor according to any one of Configurations 1 to 8. [Configuration 10] The component holder is a resin molded body, In the component housing portion, at least a part of the electrical component is covered with a resin sealing material, The elastic modulus of the resin sealing material is higher than the elastic modulus of the resin material constituting the component holder, and the wound field magnetic rotor according to any one of Configurations 1 to 9. [Configuration 11] The field winding is formed by winding a conductor wire and has conductor wire end portions (127, 128) extending in the axial direction, The component holder has a through hole (146) penetrating in the axial direction, In the component holder, at least one of the conductor wire end portion and the end portion of a bus bar (129) electrically connected to the conductor wire end portion is fixed to the component holder in a state of being inserted through the through hole on the radially opposite side of the fitting and fixing portion with respect to the component housing portion, and the wound field magnetic rotor according to any one of Configurations 1 to 10. [Configuration 12] In the component holder, a reinforcing portion (172) extending annularly around the shaft portion is integrally provided at a portion surrounding the component housing portion, and the wound field magnetic rotor according to any one of Configurations 1 to 11.

Description of Signs

[0092] 32…Rotating shaft, 60…Rotor, 61…Rotor core, 70…Field winding, 102…Circuit module, 130…Component holder, 134a…Inner peripheral surface, 136…First housing portion, 142…Second housing portion, 152…Connecting portion, 162…Thin portion.

Claims

1. A wound-field rotor (60) having: a rotor core (61); a field winding (70) wound around the rotor core; and a circuit module (102) disposed on one axial end side of the rotor core and including an electrical component connected to the field winding, wherein the circuit module has a component holder (130) for holding the electrical component, the component holder has: a fitting and fixing portion (134a) that is fitted and fixed with a margin to a rotating member that is either the shaft portion (32) of the rotor core or an annular member that rotates integrally with the shaft portion; and a component accommodating portion (136, 142) that is provided at a position that is either radially outside or radially inside the fitting and fixing portion and that accommodates the electrical component, and a strain absorbing portion (151, 152, 161, 162) for absorbing radial strain due to the margin is provided between the fitting and fixing portion and the component accommodating portion in the component holder.

2. The wound-field rotor according to claim 1, wherein the component holder is provided with a plurality of hole portions (151) that are arranged in the circumferential direction and each penetrate in the axial direction, and connecting portions (152) that are located between adjacent ones of the hole portions in the circumferential direction and extend in the radial direction as the strain absorbing portion.

3. The wound-field rotor according to claim 2, wherein the connecting portion is an inclined connecting portion that is inclined with respect to a radiation line that linearly extends in the radial direction from the center point of the shaft portion in a plan view of the component holder.

4. The wound-field rotor according to claim 2, wherein the connecting portion is a bent connecting portion that forms a bent shape in a plan view of the component holder.

5. A plurality of the electrical components are accommodated side by side in the circumferential direction in the component accommodating portion, the component accommodating portion has a presence portion where the electrical component exists and an absence portion where the electrical component does not exist in the circumferential direction, and the connecting portion is provided at a position corresponding to the absence portion among the presence portion and the absence portion in the circumferential direction in the component holder.

6. The wound-field rotor according to claim 1, wherein an annular groove portion (161) that opens to at least one of end faces on both axial sides of the component holder and extends in the circumferential direction is provided between the fitting and fixing portion and the component accommodating portion in the component holder, and a thin-walled portion (162) that is thinned in the axial direction by the annular groove portion serves as the strain absorbing portion.

7. In the component holder, annular groove portions (161) that open at the axial end faces and extend in the circumferential direction are provided on both axial sides of the component holder between the fitting and fixing portion and the component accommodating portion, and a thin-walled portion (162) between the annular groove portions on both axial sides is the distortion absorbing portion. The wound field magnet rotor according to claim 1, wherein the thin-walled portion is provided so as to extend in a direction inclined with respect to a direction orthogonal to the axial direction between the fitting and fixing portion and the component accommodating portion.

8. In the component accommodating portion, capacitors (91, 92) and a diode (93) are accommodated side by side in the circumferential direction as the electrical components. The wound field magnet rotor according to any one of claims 1 to 7, wherein in the component holder, the degree of distortion absorption in the distortion absorbing portion is different at a circumferential position corresponding to the capacitor and a circumferential position corresponding to the diode.

9. The component holder is a resin molded body. The wound field magnet rotor according to any one of claims 1 to 7, wherein a metal ring body (171) is insert-molded on the side of the rotating member of the distortion absorbing portion in the component holder.

10. The component holder is a resin molded body. In the component accommodating portion, at least a part of the electrical component is covered with a resin encapsulant. The wound field magnet rotor according to any one of claims 1 to 7, wherein an elastic modulus of the resin encapsulant is higher than an elastic modulus of a resin material constituting the component holder.

11. The field winding is configured by winding a conductor material and has conductor end portions (127, 128) extending in the axial direction. The component holder has a through hole (146) penetrating in the axial direction. The wound field magnet rotor according to any one of claims 1 to 7, wherein in the component holder, at least one of the conductor end portion and an end portion of a bus bar (129) electrically connected to the conductor end portion is fixed to the component holder in a state of being inserted into the through hole on the radially opposite side of the fitting and fixing portion with the component accommodating portion interposed therebetween.

12. The wound field magnet rotor according to any one of claims 1 to 7, wherein a reinforcing portion (172) extending annularly around the shaft portion is integrally provided at a portion surrounding the component accommodating portion in the component holder.

Images