Rotary electric machine

Abstract

To provide a rotary electric machine capable of suppressing damage of a control substrate device of a rotary rectifier.SOLUTION: A rotary rectifier 101 of a rotary electric machine has a control unit 102. The control unit 102 has a housing 150, a control substrate device 103, a filler 160, recesses 162, and protrusions 161. The housing 150 has a cylindrical portion 151. The control substrate device 103 is accommodated in the cylindrical portion 151. The filler 160 is filled between the cylindrical portion 151 and the control substrate device 103 in the cylindrical portion 151. Each of the recesses 162 is provided on one of an inner circumferential surface 151b of the cylindrical portion 151 and an outer circumferential surface 160a of the filler 160 overlapping the inner circumferential surface 151b. Each of the protrusions 161 is provided on the other one of the inner circumferential surface 151b of the cylindrical portion 151 and the outer circumferential surface 160a of the filler 160, and fit in each of the recesses 162.SELECTED DRAWING: Figure 6

Description

[Technical field]

[0001] The present invention relates to a rotating electric machine. [Background technology]

[0002] A self-starting type rotating electric machine having a rotary rectifier that rotates integrally with a shaft has been known as a rotating electric machine. This type of rotary rectifier has a control unit having a housing fixed to the shaft, a control board device provided in a cylindrical part of the housing, and a filler made of a synthetic resin material and filled between the cylindrical part and the control board device. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 6-153475 Summary of the Invention [Problem to be solved by the invention]

[0004] In the control unit, the filled filler may shrink (sink mark) and peel off from the cylindrical part of the housing. If the filler peels off from the cylindrical part of the housing, the filler may rotate relative to the cylindrical part of the housing due to the influence of centrifugal force, etc., and the control board device may be damaged.

[0005] An object of the present invention is to provide a rotating electric machine capable of suppressing damage to a control board device of a rotating rectifier. [Means for solving the problem]

[0006] A rotating electric machine according to an embodiment of the present invention comprises a stator, a rotor having a shaft with a portion located inside the stator and rotatable around a rotation axis, and an excitation device having a rotary rectifier having a control unit and rotating integrally with the shaft, wherein the control unit has a cylindrical portion shaped around the rotation axis, a housing fixed to the shaft, a control board device housed within the cylindrical portion and fixed to the housing, a filler filled between the cylindrical portion and the control board device within the cylindrical portion, a recess provided on one of the inner surface of the cylindrical portion and the outer surface of the filler overlapping the inner surface, and a convex portion provided on the other of the inner surface of the cylindrical portion and the outer surface of the filler and fitted into the recess. Effect of the Invention

[0007] According to the rotating electric machine of the embodiment of the present invention, it is possible to obtain a rotating electric machine capable of suppressing damage to the control board device of the rotary rectifier. [Brief description of the drawings]

[0008] [Figure 1] FIG. 1 is a diagram illustrating a schematic configuration of a rotating electric machine according to an embodiment. [Diagram 2] FIG. 2 is a cross-sectional view of a portion including an excitation device for a rotating electric machine according to an embodiment. [Diagram 3] FIG. 3 is a diagram showing a circuit configuration of the rotating electric machine according to the embodiment. [Figure 4] FIG. 4 is a cross-sectional view of a control unit in the excitation device according to the embodiment. [Diagram 5] FIG. 5 is a front view of a control unit in the excitation device according to the embodiment. [Figure 6] FIG. 6 is a cross-sectional view of a control unit in the excitation device according to the embodiment. [Figure 7] FIG. 7 is a cross-sectional view showing a part of the control unit according to the embodiment. [Figure 8] FIG. 8 is a cross-sectional view showing a part of the control unit according to the embodiment. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0009] Exemplary embodiments of the present invention are disclosed below. The configurations of the embodiments described below and the actions and effects brought about by the configurations are merely examples. The present invention can be realized by configurations other than those disclosed in the following embodiments. Furthermore, according to the present invention, it is possible to obtain at least one of the various effects (including derivative effects) obtained by the configurations.

[0010] Fig. 1 is a diagram illustrating a schematic configuration of a rotating electric machine 1 according to an embodiment. As illustrated in Fig. 1, the rotating electric machine 1 includes a rotor 10, a stator 20, bearings 32, a heat exchanger 41, an exciter 50, an internal fan 15, and a housing 100. The rotating electric machine 1 is, for example, a self-starting brushless rotating electric machine (generator). However, the rotating electric machine 1 is not limited to the above.

[0011] The housing 100 has a frame 30, a bearing bracket 34, an exciter cover 61, and a heat exchanger cover 42. The frame 30, the bearing bracket 34, the exciter cover 61, and the heat exchanger cover 42 are fixed to one another. Inside the housing 100, an accommodation chamber is formed to accommodate each part of the rotating electric machine 1.

[0012] The rotor 10 has a shaft 11, a rotor core 12, and a rotor winding 13. The shaft 11 is supported by a bearing bracket 34 of the housing 100 via two bearings 32 so as to be rotatable around a central rotation axis Ax.

[0013] In this specification, for convenience, the axial direction, radial direction, and circumferential direction are defined. The axial direction is a direction along the central axis of rotation Ax. The radial direction is a direction perpendicular to the central axis of rotation Ax. The circumferential direction is a direction around the central axis of rotation Ax. Hereinafter, the axial direction, radial direction, and circumferential direction are the axial direction, radial direction, and circumferential direction of the shaft 11 (i.e., the central axis of rotation Ax) unless otherwise specified. The axial direction also includes a first axial direction D1 and a second axial direction D2. The first axial direction D1 is a direction along the central axis of rotation Ax. The second axial direction D2 is the opposite direction to the first axial direction D1.

[0014] The shaft 11 is accommodated in the housing 100 with a portion of the shaft 11 protruding outward from the housing 100. The shaft 11 has an end 11a on the first axial direction D1 side and an end 11b on the second axial direction D2 side. The end 11a constitutes a protruding portion protruding outward from the housing 100.

[0015] The rotor core 12 is housed in a housing 100 and fixed to the shaft 11. The rotor core 12 is located radially outward from the shaft 11. The rotor core 12 rotates integrally with the shaft 11. The rotor winding 13 is fixed to the rotor core 12. In detail, the rotor winding 13 is fixed to the rotor core 12 while passing through the rotor core 12 in the axial direction.

[0016] An inner fan 15 is fixed to the shaft 11 between the rotor core 12 and the two bearings 32. That is, two inner fans 15 are fixed to the shaft 11 with a gap therebetween in the axial direction. The two inner fans 15 rotate integrally with the shaft 11. A partition plate 15a is provided on the radial outside of the inner fan 15. The inner fan 15 sucks in gas (hereinafter also referred to as cooling gas) in the housing 100 on the axial outside of the inner fan 15 and the partition plate 15a, i.e., on the bearing 32 side, and sends it to the rotor core 12 and stator 20 side. That is, the inner fan 15 blows air in the axial direction.

[0017] The stator 20 has a stator core 21 and a stator winding 22, and is accommodated in a container 100. The stator core 21 faces the rotor core 12 in the radial direction of the shaft 11. The stator core 21 is located radially outside the rotor core 12 with a gap between it and the outer circumferential surface of the shaft 11. The stator core 21 has a cylindrical shape. The stator winding 22 is fixed to the stator core 21 while passing through the stator core 21.

[0018] The frame 30 is disposed outside the rotor core 12 and the stator 20 so as to surround them. Bearing brackets 34 are attached to both axial ends of the frame 30. The bearing brackets 34 each support a bearing 32.

[0019] The heat exchanger 41 cools a cooling gas such as air that cools the rotor 10 and the stator 20. The heat exchanger 41 has a cooling pipe (not shown) through which a cooling medium such as outside air or water flows. The heat exchanger 41 is housed in a heat exchanger cover 42.

[0020] The space within the frame 30 and the space within the heat exchanger cover 42 communicate with each other through a heat exchanger inlet opening 43 and two heat exchanger outlet openings 44. The heat exchanger inlet opening 43 is formed above the stator 20. The two heat exchanger outlet openings 44 are formed on both sides of the heat exchanger inlet opening 43 in the axial direction.

[0021] The exciter 50 is housed in an exciter cover 61 of the housing 100 .

[0022] 2 is a cross-sectional view of a portion including an excitation device 50 of the rotating electric machine 1 of the embodiment. As shown in FIGS.

[0023] The AC excitation unit 51 has an excitation rotor 52 and an excitation stator 53 .

[0024] The excitation stator 53 is formed in an annular shape around the central axis of rotation Ax. The excitation stator 53 is provided so as to face the excitation rotor 52 in the radial direction, and is fixed to the housing 100. The excitation stator 53 has an excitation stator core 71 and an excitation stator winding 72, and is configured as an electromagnet. DC power is supplied to the excitation stator winding 72 from a power source.

[0025] The excitation rotor 52 is coupled (fixed) to the shaft 11 and rotates integrally with the shaft 11. The excitation rotor 52 has an excitation rotor core 131 and an excitation rotor winding 132.

[0026] The excitation rotor core 131 is formed in an annular (cylindrical) shape around the central axis of rotation Ax. The excitation rotor core 131 has, for example, a laminated structure in which disk-shaped steel plates made of a ferromagnetic material and having an opening in the center are laminated in the axial direction. The excitation rotor core 131 is fixed to the shaft 11. The excitation rotor core 131 is inserted radially inside the excitation stator 53. The outer periphery of the excitation rotor core 131 is formed with a plurality of slots that extend in the axial direction at intervals from one another in the circumferential direction of the central axis of rotation Ax. The excitation rotor windings 132 are inserted in these slots. The excitation rotor windings 132 are fixed to the excitation rotor core 131.

[0027] The rotary rectifier 101 includes a control unit 102. As shown in Fig. 2, the control unit 102 is fixed to an end 11b on the second axial side of the shaft 11, and rotates integrally with the shaft 11. The control unit 102 includes a control board device 103 that controls the rotary rectifier 101. The control unit 102 will be described in detail later.

[0028] Fig. 3 is a diagram showing a circuit configuration of the rotating electric machine 1 of the embodiment. As shown in Fig. 3, in addition to the control board device 103, the rotating electric machine 1 includes a power converter 110, a thyristor 111, a diode 112, and a discharge resistor 113. The power converter 110 includes three thyristors 114 and three diodes 115.

[0029] In the excitation device 50 configured as above, when the excitation rotor 52 rotates around the rotation axis Ax inside the DC field generated by the excitation stator 53, an AC induced electromotive force is generated in the excitation rotor winding 132 of the excitation rotor 52. The AC power generated in the excitation rotor winding 132 is converted to DC power by the rotary rectifier 101 and supplied to the rotor winding 23 (field winding) provided on the rotor core 12 which also rotates around the rotation axis Ax. This field generates an induced electromotive force in the stator winding 22 (armature winding).

[0030] During the above operation, the control board device 103 performs the following control. That is, the control board device 103 makes the thyristor 111 conductive at startup. As a result, the control board device 103 connects the discharge resistor 113, together with the diode 112, in parallel to the rotor winding 13 of the rotor 10 as a field winding. As a result, the control board device 103 suppresses the high AC voltage caused by the transformer action between the stator winding 22 of the stator 20 and the rotor winding 13 of the rotor 10 at startup, and protects the elements (thyristor 114, diode 115) that make up the rotary rectifier 101 from overvoltage.

[0031] When the rotating electric machine 1 starts, the rotation speed of the shaft 11 approaches the synchronous speed, and the synchronizing phase reaches the allowable range, the control board device 103 makes the thyristor 111 non-conductive and starts the operation of the power converter 110. As a result, the AC voltage induced in the exciting rotor winding 132 of the exciting rotor 52 by the exciting magnetic flux of the exciting stator winding 72 of the exciting stator 53 of the AC exciting unit 51 is converted to a DC voltage by the power converter 110, and the rotor winding 13 of the rotor 10 is DC excited, thereby entering synchronous operation.

[0032] Next, the control unit 102 will be described in detail. Fig. 4 is a cross-sectional view of the control unit 102 in the exciter 50 of the embodiment. Specifically, Fig. 4 is a cross-sectional view of the control unit 102 in a plane including the rotation central axis Ax. Fig. 5 is a front view of the control unit 102 in the exciter 50 of the embodiment. Fig. 6 is a cross-sectional view of the control unit 102 in the exciter 50 of the embodiment. Specifically, Fig. 6 is a cross-sectional view of the control unit 102 in a plane perpendicular to the rotation central axis Ax.

[0033] As shown in FIGS. 4 to 6, the control unit 102 has a housing 150, a control board device 103, and a filler 160. The control unit 102 includes a housing 150, a control board device 103, and a filler 160. The housing 150 includes a housing 150a.

[0034] The housing 150 is fixed to an end 11b on the second axial direction side of the shaft 11. The housing 150 has a cylindrical portion 151, a bottom wall 152, and a partition wall 153.

[0035] The cylindrical portion 151 is formed in a cylindrical shape around the central axis of rotation Ax. The cylindrical portion 151 has an outer peripheral surface 151a and an inner peripheral surface 151b. The outer peripheral surface 151a is formed in a cylindrical surface shape around the central axis of rotation Ax and faces radially outward. The inner peripheral surface 151b is formed in a cylindrical surface shape around the central axis of rotation Ax and faces radially inward. The cylindrical portion 151 also has an end portion 151c on a first axial side and an end portion 151d on a second axial side.

[0036] The bottom wall 152 is fixed to the end portion 151d of the cylindrical portion 151 and closes the opening of the end portion 151d. The bottom wall 152 is formed in a disk shape that expands in a direction perpendicular to the axial direction. The bottom wall 152 is provided with a plurality of terminals (not shown) electrically connected to a control circuit of the control board device 103.

[0037] The partition wall 153 is provided inside the cylindrical portion 151 and fixed to an inner peripheral surface 151b of the cylindrical portion 151. The partition wall 153 is formed in a disk shape extending in a direction perpendicular to the axial direction, and divides the inside of the cylindrical portion 151 into two regions. The partition wall 153 is provided with a plurality of holes 158 (FIG. 5). The plurality of holes 158 penetrate the partition wall 153 in the axial direction.

[0038] Further, the housing 150 is provided with a plurality of (for example, four) mounting portions 154 and a plurality of (for example, four) protruding portions 156.

[0039] 4 and 5, the mounting portions 154 protrude radially from the end portion 151c of the cylindrical portion 151. The mounting portions 154 are provided at intervals around the central axis of rotation Ax. As shown in FIG. 2, the mounting portions 154 are fixed to the shaft 11 by fasteners 155 such as bolts.

[0040] 4 and 6, the multiple protrusions 156 protrude radially from the bottom wall 152. The multiple protrusions 156 are provided at intervals around the central axis of rotation Ax.

[0041] The housing 150 is configured, for example, by a combination of a plurality of members. Specifically, the housing 150 has a member 171 including the cylindrical portion 151, a part of the bottom wall 152, and the mounting portion 154, a member 172 including a part of the bottom wall 152 and the protruding portion 156, and a member 173 including the partition wall 153. The members 171 and 173 are configured, for example, by a metal material. The member 172 is configured, for example, by a fiber-reinforced plastic. Note that the housing 150 is not limited to the above.

[0042] 4 and 6, control board device 103 is accommodated in cylindrical portion 151 and fixed to housing 150. In detail, control board device 103 is fixed to the inner surface of bottom wall 152 of housing 150 and extends from bottom wall 152 in first axial direction D1. Control board device 103 is spaced apart from inner circumferential surface 151b of cylindrical portion 151 and partition wall 153.

[0043] The control board device 103 has a plurality of (three, for example) boards 142 and a connecting member 143. A control circuit for controlling the rotary rectifier 101 is provided on the boards 142. Wiring 157 (FIG. 2) is connected to the control circuit via a terminal on the bottom wall 152, and the control circuit is electrically connected to the thyristors 111, 114 via the terminal and the wiring 157. The control circuit is also called a phase-adjusting circuit. The number of boards 142 is not limited to the above.

[0044] The plurality of substrates 142 are arranged at intervals in a direction perpendicular to the axial direction. The plurality of substrates 142 are joined (fixed) by connecting members 143.

[0045] As shown in Figs. 4 and 6, the filler 160 is filled inside the cylindrical portion 151. In detail, the filler 160 is filled between the bottom wall 152 and the partition wall 153 of the housing 150. That is, the filler 160 is filled between the cylindrical portion 151 and the control board device 103. The filler 160 has an outer peripheral surface 160a that overlaps (contacts) with an inner peripheral surface 151b of the cylindrical portion 151 of the housing 150. The filler 160 is made of a synthetic resin material and has insulating properties. The filler 160 is also referred to as a resin portion or an insulating portion.

[0046] Filler 160 is formed by filling (injecting) a liquid or semi-liquid synthetic resin material, which is the material of filler 160, between partition wall 153 and bottom wall 152 through hole 158 in partition wall 153 with control board device 103 placed inside housing 150, and then solidifying. Filler 160 is filled between control board device 103 and housing 150, and fixes control board device 103 to housing 150.

[0047] As shown in FIG. 4 to FIG. 6, the control unit 102 has a plurality of (four, for example) protruding portions 161 and a plurality of (four, for example) recessed portions 162. The protruding portions 161 are provided on the inner peripheral surface 151b of the cylindrical portion 151, and the recessed portions 162 are provided on the outer peripheral surface 160a of the filler 160. The protruding portions 161 are fitted into the recessed portions 162. The protruding portions 161 and the recessed portions 162 are each provided at intervals around the rotation central axis Ax. In detail, the protruding portions 161 and the recessed portions 162 are each disposed at equal intervals around the rotation central axis Ax. The center of gravity P1 (FIG. 6) of the plurality of protruding portions 161 coincides with the rotation central axis Ax. In other words, the center of gravity P1 of the group of the plurality of protruding portions 161 coincides with the rotation central axis Ax. The numbers of the protruding portions 161 and the recessed portions 162 are not limited to the above. For example, the number of each of the convex portion 161 and the concave portion 162 may be one, or may be a number other than four.

[0048] The protruding portion 161 protrudes radially inward from an inner circumferential surface 151b of the cylindrical portion 151. The protruding portion 161 extends along the axial direction of the central rotation axis Ax. The protruding portion 161 is made of, for example, a metal material. The protruding portion 161 is fixed to the cylindrical portion 151 by welding or the like. Note that the protruding portion 161 may be integrally formed with the cylindrical portion 151 by casting or the like.

[0049] Fig. 7 is a cross-sectional view showing a part of the control unit 102 according to the embodiment. Specifically, Fig. 7 is a cross-sectional view of a part of the control unit 102 along a plane including the central axis of rotation Ax. Fig. 8 is a cross-sectional view of a part of the control unit 102 according to the embodiment. Specifically, Fig. 8 is a cross-sectional view of a part of the control unit 102 along a plane perpendicular to the central axis of rotation Ax.

[0050] 7 and 8, the protrusion 161 is formed in a substantially rectangular parallelepiped shape extending in the axial direction. The shape of the protrusion 161 is not limited to the above. For example, the protrusion 161 may be plate-shaped or semicircular. The protrusion 161 is made of, for example, a metal material.

[0051] The protrusion 161 has two end faces 161a and 161b, two side faces 161c and 161d, a tip face 161e, and a chamfered portion 161f.

[0052] The end face 161a is a face on the first axial direction D1 side. The end face 161b is a face on the opposite side to the end face 161a. In other words, the end face 161b is a face on the second axial direction D2 side.

[0053] The side surface 161c is a surface on one side in the circumferential direction. The side surface 161d is a surface on the opposite side to the side surface 161c. In other words, the side surface 161d is a surface on the other side in the circumferential direction.

[0054] The tip surface 161e is the surface on the protruding direction side of the convex portion 161, that is, the surface on the radially inner side.

[0055] The chamfered portion 161f is formed between the above-mentioned multiple surfaces (end surfaces 161a, 161b, side surfaces 161c, 161d, and tip surface 161e) and is inclined with respect to those surfaces. Note that a curved shape (R-shape) may be formed at the edge of each surface (end surfaces 161a, 161b, side surfaces 161c, 161d, and tip surface 161e) of the protruding portion 161. Furthermore, in addition to the end of each surface of the protruding portion 161, the boundary between each surface (end surfaces 161a, 161b, side surfaces 161c, 161d) of the protruding portion 161 and the inner peripheral surface 151b of the cylindrical portion 151 may also be curved (R-shaped). In this way, it is possible to prevent the contact surface between the filling material 160 and the protruding portion 161 or the cylindrical portion 151 from becoming a corner, and it is possible to suppress the occurrence of breakage or cracks in the filling material 160 due to centrifugal force or the like.

[0056] The recess 162 is a surface recessed in the radial direction from the outer circumferential surface 160a of the filler 160. The recess 162 is also referred to as a concave portion. The recess 162 has two end faces 162a and 162b, two side faces 162c and 162d, a bottom face 162e, and an inclined face 162f. The two end faces 162a and 162b, the two side faces 162c and 162d, the bottom face 162e, and the inclined face 162f overlap (are in contact with) the two end faces 161a and 161b, the two side faces 161c and 161d, the tip face 161e, and the chamfered portion 161f of the protrusion 161.

[0057] The end face 162a is a face on the side of the first axial direction D1. The end face 162b is a face on the side of the second axial direction D2. The end face 162a and the end face 162b face each other in the axial direction.

[0058] The side surface 162c is a surface on one side in the circumferential direction. The side surface 162d is a surface on the other side in the circumferential direction. The side surfaces 162c and 162d face each other in the circumferential direction.

[0059] The bottom surface 162e is the radially inner surface.

[0060] The inclined surface 162f is formed between the above-mentioned surfaces (the end surfaces 162a, 162b, the side surfaces 162c, 162d, and the bottom surface 162e).

[0061] The recess 162 configured as described above sandwiches the protrusion 161 between the two side surfaces 162c and 162d in the circumferential direction of the rotation center axis Ax.

[0062] The recess 162 is formed along the protrusion 161 by injecting a molten synthetic resin material, which is the material of the filler 160, between the partition wall 153 and the bottom wall 152 through the hole 158 of the partition wall 153 and solidifying it. There is a case where sink occurs in such a filler 160, and the filler 160 peels off from the cylindrical part 151 of the housing 150. In contrast, in this embodiment, since the protrusion 161 provided on the cylindrical part 151 fits into the recess 162 provided on the filler 160, even if the above peeling occurs, the relative rotation between the cylindrical part 151 and the filler 160 is suppressed. Therefore, even if the above peeling occurs, the control board device 103 in the cylindrical part 151 is suppressed from rotating relative to the cylindrical part 151.

[0063] Next, a description will be given of the airflow generated in the rotating electrical machine 1. The direction of the airflow is indicated by arrows in Fig. 1 and Fig. 2.

[0064] 1, as shaft 11 rotates, internal fan 15 rotates, driving the cooling gas inside frame 30. The cooling gas is sent by internal fan 15 from both outer sides in the axial direction toward rotor core 12 and stator 20, passes through rotor core 12, rotor winding 13, stator core 21, and stator winding 22 while cooling them, and is then pushed out in the radial direction of stator 20.

[0065] The cooling gas pushed out in the radial direction of the stator 20 flows into the heat exchanger cover 42 from the heat exchanger inlet opening 43. The cooling gas that has flowed into the heat exchanger cover 42 is cooled in the heat exchanger 41, and then flows out of the heat exchanger 41 and into the frame 30 from the two heat exchanger outlet openings 44. The cooling gas that has flowed into the frame 30 respectively flows into the internal fan 15 again.

[0066] In addition, a part of the cooling gas flowing out from the heat exchanger 41 flows into the branch pipe 62, flows into the exciter cover 61, passes through the exciter cover 61, and then returns to the frame 30 through the return pipe 63, and merges with the cooling gas that has flowed into the frame 30 from one of the heat exchanger outlet openings 44. The cooling gas that has flowed into the exciter cover 61 cools each part of the exciter 50.

[0067] As described above, in this embodiment, the rotating electric machine 1 includes the stator 20, the rotor 10, and the exciter 50. The rotor 10 has a shaft 11 that is partially located inside the stator 20 and can rotate around the rotation axis Ax. The exciter 50 has a rotary rectifier 101 that rotates integrally with the shaft 11. The rotary rectifier 101 has a control unit 102. The control unit 102 has a housing 150, a control board device 103, a filler 160, a recess 162, and a protrusion 161. The housing 150 has a cylindrical portion 151 that is cylindrical around the rotation axis Ax, and is fixed to the shaft 11. The control board device 103 is accommodated in the cylindrical portion 151 and fixed to the housing 150. The filler 160 is filled between the cylindrical portion 151 and the control board device 103 in the cylindrical portion 151. The recess 162 is provided on one of the inner peripheral surface 151b of the cylindrical portion 151 and the outer peripheral surface 160a of the filler 160 overlapping the inner peripheral surface 151b. The protrusion 161 is provided on the other of the inner peripheral surface 151b of the cylindrical portion 151 and the outer peripheral surface 160a of the filler 160, and fits into the recess 162.

[0068] According to this configuration, the protrusion 161 provided on the other of the inner peripheral surface 151b of the cylindrical portion 151 and the outer peripheral surface 160a of the filler 160 is fitted into the recess 162 provided on one of the inner peripheral surface 151b of the cylindrical portion 151 and the outer peripheral surface 160a of the filler 160. Therefore, even if a sink occurs in the filler 160 and the filler 160 is peeled off from the cylindrical portion 151 of the housing 150, the filler 160 can be prevented from rotating relative to the cylindrical portion 151 of the housing 150 due to the influence of centrifugal force, etc., and the occurrence of vibration in the control board device 103 can be prevented. Therefore, according to the above configuration, the control board device 103 can be prevented from being damaged. That is, according to the above configuration, the control board device 103 can be protected. In addition, according to the above configuration, damage to the control board device 103 can be suppressed, so there are no restrictions on the dimensional shrinkage rate of the filler 160, making it easier to select a filler 160 with excellent electrical properties, thermal conductivity, and mechanical properties.

[0069] Further, the recessed portion 162 sandwiches the protruding portion 161 in the circumferential direction of the rotation central axis Ax.

[0070] According to this configuration, the circumferential movement of the convex portion 161 is restricted by the concave portion 162, so that even if the filler 160 of the cylindrical portion 151 peels off from the cylindrical portion 151 of the housing 150, the filler 160 can be further prevented from rotating relative to the cylindrical portion 151 of the housing 150 due to the influence of centrifugal force, etc. Therefore, according to the above configuration, the control board device 103 can be further prevented from being damaged.

[0071] The recessed portion 162 is provided on an outer peripheral surface 160 a of the filler 160 , and the protruding portion 161 is provided on an inner peripheral surface 151 b of the cylindrical portion 151 .

[0072] According to this configuration, the strength and rigidity of the cylindrical portion 151 can be increased as compared to a configuration in which the recess 162 is provided in the cylindrical portion 151. Therefore, according to the above configuration, when a predetermined strength and rigidity of the cylindrical portion 151 is ensured, the thickness of the cylindrical portion 151 can be made smaller as compared to a configuration in which the recess 162 is provided in the cylindrical portion 151.

[0073] Moreover, the protrusion 161 extends along the axial direction of the rotation center axis Ax.

[0074] According to this configuration, when filling the filler 160 from one end of the cylindrical portion 151, the filler 160 is likely to move to the other end of the cylindrical portion 151. Therefore, the occurrence of insufficient filling of the filler 160 can be suppressed.

[0075] Further, a plurality of recesses 162 and a plurality of protrusions 161 are provided around the rotational center axis Ax at intervals, and the center of gravity P1 of the plurality of protrusions 161 coincides with the rotational center axis Ax.

[0076] With this configuration, it is possible to prevent the shaft 11 from wobbling in its rotation.

[0077] In the above embodiment, the convex portion 161 is provided on the inner peripheral surface 151b of the cylindrical portion 151 of the housing 150, and the concave portion 162 is provided on the outer peripheral surface 160a of the filler 160. However, the present invention is not limited to this. For example, the convex portion 161 may be provided on the outer peripheral surface 160a of the filler 160, and the concave portion 162 may be provided on the inner peripheral surface 151b of the cylindrical portion 151 of the housing 150.

[0078] Although some embodiments of the present invention have been described, these embodiments are presented as examples and are not intended to limit the scope of the invention. These novel embodiments can be implemented in various other forms, and various omissions, substitutions, and modifications can be made without departing from the spirit of the invention. These embodiments and their modifications are included in the scope and spirit of the invention, and are included in the scope of the invention and its equivalents described in the claims. [Explanation of symbols]

[0079] 1...rotating electric machine, 10...rotor, 11...shaft, 20...stator, 50...exciter, 101...rotary rectifier, 102...control unit, 103...control board device, 150...housing, 151...cylindrical portion, 151b...inner surface, 160...filler, 160a...outer surface, 161...convex portion, 162...concave portion, Ax...rotation axis, P1...center of gravity.

Claims

1. A stator; A rotor having a shaft, a portion of which is located inside the stator and which is rotatable about a central axis of rotation; an exciter having a rotary rectifier having a control unit and rotating integrally with the shaft; Equipped with The control unit a housing having a cylindrical portion shaped around the central axis of rotation and fixed to the shaft; A control board device accommodated in the cylindrical portion and fixed to the housing; A filler is filled between the cylindrical portion and the control board device within the cylindrical portion; a recess provided on one of an inner circumferential surface of the cylindrical portion and an outer circumferential surface of the filler overlapping the inner circumferential surface; a protrusion provided on the other of the inner circumferential surface of the cylindrical portion and the outer circumferential surface of the filler and fitted into the recess; With Rotating electric motor.

2. The recessed portion sandwiches the protruding portion in the circumferential direction of the rotation central axis. The rotating electric machine according to claim 1 .

3. The recess is provided on the outer circumferential surface of the filling material, The protrusion is provided on the inner circumferential surface of the cylindrical portion. The rotating electric machine according to claim 1 .

4. The protrusion extends along the axial direction of the rotation center shaft. The rotating electric machine according to claim 3 .

5. the recessed portion and the protruding portion are each provided in a plurality at intervals around the central axis of rotation, The center of gravity of the plurality of protrusions coincides with the central axis of rotation. The rotating electric machine according to claim 1 .

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