JP6112983B2 - Rotating electric machine - Google Patents

Description

  The present invention relates to a rotating electrical machine.

  2. Description of the Related Art Conventionally, a rotating electrical machine that rotates a rotor by forming a rotating magnetic field on a rotor magnet by a stator having a core member is known (see, for example, Patent Document 1).

Japanese Patent No. 4871216

  However, when such a conventional rotating electrical machine is driven at a high voltage with a low voltage specification structure, the potential of the core member may become unstable, which may increase electromagnetic noise.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a rotating electrical machine that can suppress an increase in electromagnetic noise even when driven at a high voltage.

In order to solve the above-described problem, a rotating electrical machine according to claim 1 is configured such that a core member configured in an annular shape and having a plurality of teeth portions formed radially and wound around each of the plurality of teeth portions via an insulator. A stator having a wound winding; a rotating shaft member disposed radially inward of the core member; and extending along a central axis direction of the core member; and supported by the rotating shaft member; A rotor having a rotor magnet disposed radially opposite to the stator; a conductive member connected to the core member and grounded to a ground portion; and a central portion disposed radially inward of the core member but and a center piece for supporting the core member is a pillar portion, the conductive member is inserted between the core member and the strut of the center piece, the inner peripheral surface of said core member It is supported in a touch state.

According to this rotating electrical machine, the core member of the stator is wound with windings around the radially formed teeth portion via the insulator. On the other hand, the rotating shaft member is disposed radially inward of the core member, extends along the central axis direction of the core member, and supports the rotor. The rotor faces the stator in the radial direction. The rotor magnet is arranged in the same manner. Therefore, when a voltage is applied to the winding, the rotor rotates by receiving a rotating magnetic field from the stator. On the other hand, a conductive member is connected to the core member, and this conductive member is grounded to the ground portion. Thereby, even when a high voltage is applied to the winding of the core member, the potential of the core member is stabilized, so that an increase in electromagnetic noise can be suppressed.
Further, according to this rotating electric machine, the center piece supports the core member with the central portion disposed on the radially inner side of the core member serving as the support column. On the other hand, the conductive member is inserted between the support portion of the center piece and the core member, and is supported in contact with the inner peripheral surface of the core member. Thereby, the displacement of the conductive member can be suppressed by the center piece and the core member.

In order to solve the above-described problem, a rotating electrical machine according to claim 2 is configured such that a core member configured in an annular shape and having a plurality of teeth portions formed radially and wound around each of the plurality of teeth portions via an insulator. A stator having a wound winding; a rotating shaft member disposed radially inward of the core member; and extending along a central axis direction of the core member; and supported by the rotating shaft member; A rotor having a rotor magnet disposed radially opposite to the stator; a conductive member connected to the core member and grounded to a ground portion; and a central portion disposed radially inward of the core member together but to support the core member is a pillar portion, and a center piece having a flange portion extending from one axial end of the strut, the conductive member, the center piece It penetrates in pressed state with respect to the flange portion.

According to this rotating electrical machine, the core member of the stator is wound with windings around the radially formed teeth portion via the insulator. On the other hand, the rotating shaft member is disposed radially inward of the core member, extends along the central axis direction of the core member, and supports the rotor. The rotor faces the stator in the radial direction. The rotor magnet is arranged in the same manner. Therefore, when a voltage is applied to the winding, the rotor rotates by receiving a rotating magnetic field from the stator. On the other hand, a conductive member is connected to the core member, and this conductive member is grounded to the ground portion. Thereby, even when a high voltage is applied to the winding of the core member, the potential of the core member is stabilized, so that an increase in electromagnetic noise can be suppressed.
Further, according to this rotating electrical machine, the center piece is supported by the center portion disposed radially inward of the core member as a support portion, and extends from one axial end portion of the support portion. Has a flange. On the other hand, the conductive member penetrates the flange portion of the center piece in a press-fit state. Thereby, a conductive member can be easily hold | maintained by the press-fit part of the flange part of a center piece, and the displacement of a conductive member can be suppressed.
The rotating electrical machine according to claim 3 is the rotating electrical machine according to claim 2, wherein the center piece is made of resin, and the vibration of the conductive member is caused by the press-fitted portion into which the conductive member is press-fitted in the flange portion. It is configured to be absorbed.
According to this rotating electrical machine, the center piece is formed of resin, and the vibration of the conductive member is absorbed by the press-fit portion of the flange portion of the center piece. Thereby, even if a core member vibrates, the vibration transmitted to an earth | ground part via an electroconductive member can be suppressed.

The rotating electrical machine according to claim 4 is the rotating electrical machine according to claim 2 or 3 , wherein the conductive member is inserted into a groove formed in the core member and is supported in contact with the core member. ing.

  According to this rotating electrical machine, since the conductive member is inserted through the groove formed in the core member, the displacement of the conductive member can be suppressed by the groove.

The rotating electrical machine according to claim 5, in the rotating electric machine according to claim 1 Symbol placement, the conductive member, the other end portion in the opposing portion between the ground portion of the core member with one end contacting the ground portion Is formed of an elastic member that is in contact with the ground portion and the core member by an elastic force, and a guide portion that supports a side surface of the elastic member is formed on an outer peripheral portion of the support column portion. .

  According to this rotating electrical machine, the center piece supports the core member with the central portion disposed on the radially inner side of the core member serving as the support column. The conductive member is made of an elastic member. The elastic member has one end in contact with the ground portion and the other end in contact with a portion of the core member facing the ground portion. Is kept in contact with the elastic force. Furthermore, the guide part formed in the outer peripheral part of the support | pillar part is supporting the side surface of an elastic member.

The rotating electrical machine according to claim 6 is the rotating electrical machine according to any one of claims 1 to 5 , wherein the rotor rotates in a state where a voltage of 200 V to 300 V is applied to the winding.

  According to this rotating electrical machine, when a high voltage of 200 V to 300 V is applied to the winding, the rotor rotates by receiving a rotating magnetic field from the stator. Even when such a high voltage is applied, since the conductive member connected to the core member is grounded to the ground portion, the potential of the core member can be stabilized and an increase in electromagnetic noise can be suppressed. Become.

It is a side sectional view of a rotary electric machine according to the first embodiment (a cross-sectional view taken along line 1-1 of Figure 2.). It is a perspective view which shows a part of rotary electric machine of FIG. It is a schematic view showing a configuration of a rotary electric machine according to the first embodiment. It is a figure which shows the stator of FIG. 1, and its peripheral part. FIG. 4A shows the stator and the center piece separated from each other, and FIG. 4B shows the stator and the center piece assembled. It is a perspective view showing a stator and its peripheral portion of the rotary electric machine according to the second embodiment. It is a perspective view shown in the state where the insulator was removed from FIG. It is sectional drawing which shows the modification which hold | maintains a 2nd terminal member to a center piece. FIG. 7A shows a configuration according to the first modification, and FIG. 7B shows a configuration according to the second modification. It is a perspective view which shows the modification of a 2nd terminal member. It is a side sectional view of a rotary electric machine according to a third embodiment.

[First embodiment]
First , the first embodiment will be described. The first embodiment is an embodiment of the present invention.

The rotary electric machine 10 according to the first embodiment Ru shown in FIG. 1 is an example of a rotary electric machine according to the present invention. The rotating electrical machine 10 is suitably used as a multiphase rotating electric motor having an outer rotor structure such as an air conditioner blower motor mounted on a vehicle such as a passenger car or a fan motor for cooling a radiator. The rotating electrical machine 10 includes a stator 12, a motor shaft 14 as a rotating shaft member, a rotor 16, a center piece 18, and a control unit 20. 4A, the stator 12 includes a U-phase stator component 12U, a V-phase stator component 12V, and a W-phase stator component 12W.

  As shown in FIGS. 1 and 4A, the stator 12 includes a core member 24 (also referred to as a “stator”), an insulator 26, and a winding 28, and constitutes an electromagnetic part. ing. The core member 24 is made of iron and has an annular shape, and includes an annular portion 24A formed in an annular shape and a plurality of teeth portions 24B formed radially on the outer peripheral portion of the annular portion 24A. Slots are formed between the teeth portions 24B adjacent in the circumferential direction. A winding 28 formed of a copper wire is wound around each of the plurality of tooth portions 24B via an insulator 26. In the drawing, the detailed illustration of the winding 28 is omitted except for a part of FIG. 1, but the winding 28 is not shown in the protruding direction of the tooth portion 24 (the tooth portion 24 shown in FIG. It is wound around the inside (left and right direction). In other words, the insulator and the winding are not arranged on the radially inner side and the radially outer side of the tooth portion 24. A strut portion 30 that is the center portion of the center piece 18 is disposed inside the core member 24 in the radial direction. The strut portion 30 has a cylindrical shape and supports the core member 24.

  The center piece 18 is formed of resin and has a center piece main body 18A and a center piece cylinder 18B. The center piece main body 18A includes a cylindrical support 30 that is press-fitted inside the core member 24, and a generally disc-shaped flange 32 that extends from one end of the support 30 in the axial direction. Yes. The cylindrical center piece cylinder portion 18B is integrally fixed inside the support column portion 30 of the center piece main body portion 18A. The motor shaft 14 is inserted into the inside of the support 30 of the center piece cylinder portion 18B and the center piece main body portion 18A.

  The motor shaft 14 is disposed inside the core member 24 in the radial direction, and extends along the central axis direction of the core member 24. The motor shaft 14 rotates around its own axis by a bearing (not shown) housed inside the centerpiece cylinder 18B and a bearing 22 housed inside the support 30 of the centerpiece body 18A. Supported as possible.

  The rotor 16 is supported on one end side of the motor shaft 14 (the side opposite to the flange portion 32 side of the center piece main body portion 18A). The rotor 16 has a flat cup-shaped rotor housing 34 having a bottom portion 36 and a peripheral wall portion 38, and the stator 12 is accommodated inside the rotor housing 34.

  A cylindrical portion 40 that protrudes from the center of the bottom portion 36 of the rotor housing 34 to the side opposite to the inner space of the rotor housing 34 is formed. One end side of the above-described motor shaft 14 is press-fitted into the cylindrical portion 40. Thus, the rotor housing 34 is fixed so as to be rotatable integrally with the motor shaft 14. A rotor magnet 42 is fixed to the inner peripheral surface of the peripheral wall portion 38 of the rotor housing 34. The rotor magnet 42 is disposed to face the core member 24 of the stator 12 in the radial direction.

  On the other hand, the control unit 20 is arranged on one side in the axial direction with respect to the rotor 16 and the stator 12 (on the flange portion 32 side of the center piece main body portion 18A). The control unit 20 includes a circuit board 20A, and although not shown in detail, is attached to the flange portion 32 of the center piece main body portion 18A. The circuit board 20A is arranged with the axial direction of the rotor 16 as the plate thickness direction, and is provided on the opposite side of the stator 12 to the flange portion 32 of the center piece main body 18A.

  An electric circuit (not shown) is formed on the circuit board 20A. The electrical circuit is provided with a plurality of circuit power feeding units 44 (see FIG. 3) for switching power feeding to the windings 28 of each phase, and between the circuit power feeding unit 44 and the windings 28, A metal first terminal member 46 (also referred to as “intermediate terminal”) is provided for conducting between the two. That is, as shown in the schematic configuration diagram of FIG. 3, the circuit power feeding portion 44 and the winding 28 are electrically connected via the first terminal member 46.

  The first terminal member 46 is a bent member bent in a substantially Z shape. Further, as shown in FIG. 2, the first terminal member 46 passes through the through hole 32A formed in the flange portion 32 of the center piece main body portion 18A, and is joined to the circuit power feeding portion 44 shown in FIG. Yes. And the control unit 20 is comprised so that an electric current may be sent through the coil | winding 28 sequentially via the 1st terminal member 46 from the circuit electric power feeding part 44 according to the control signal output from the external control apparatus which is not shown in figure. The rotor 16 rotates in a state where a voltage of 200 V to 300 V is applied to the winding 28.

  Further, the control unit 20 is provided with a ground portion 48 (see FIG. 3) such as a ground wire. The ground portion 48 is a ground portion having a constant potential (fixed potential), and may be provided on the circuit board 20A or may be provided apart from the circuit board 20A. Between the earth part 48 and the core member 24, the 2nd terminal member 50 as a metal electroconductive member for electrically connecting between both is provided. That is, as shown in the schematic configuration diagram of FIG. 3, the second terminal member 50 is connected to the core member 24, and the ground portion 48 and the core member 24 are electrically connected via the second terminal member 50. It is connected to the.

  In the present embodiment, the second terminal member 50 is tin-plated on the copper-based material, and as a result, the core member is compared with the case where the second terminal member 50 is composed of only the copper-based material. The electric corrosion potential difference with 24 (made of iron) is reduced, and the expansion of the potential difference due to the oxide is suppressed.

  The second terminal member 50 is a bent plate material bent in a substantially Z shape. As shown in FIG. 1, the second terminal member 50 is inserted (press-fitted) into the gap between the support column 30 of the center piece 18 and the core member 24 and supported in contact with the inner peripheral surface of the core member 24. Has been. Here, in the present embodiment, the second terminal member 50 is formed with a cut-and-raised portion 52 at a portion disposed between the support column portion 30 and the core member 24, and a distal end portion of the cut-and-raised portion 52. Is in contact with the inner peripheral surface of the core member 24. FIG. 4A shows a state before the second terminal member 50 is inserted between the support 30 of the center piece 18 and the core member 24. 4B shows a state after the second terminal member 50 (see FIG. 4A) is inserted between the support 30 of the center piece 18 and the core member 24. .

  As shown in FIG. 2, the second terminal member 50 passes through a through hole 32 </ b> B formed in the flange portion 32 of the center piece main body portion 18 </ b> A. In the present embodiment, the second terminal member 50 penetrates the flange portion 32 of the center piece 18 in a press-fit state. In other words, the vibration of the second terminal member 50 is absorbed by the press-fitted portion (through hole 32B) into which the second terminal member 50 is press-fitted in the flange portion 32. The second terminal member 50 is grounded to the ground portion 48 shown in FIG.

Next , the operation and effect of the first embodiment will be described.

As described above in detail, according to the rotating electrical machine 10 according to the first embodiment, the core member 24 of the stator 12 has the windings 28 wound around the radially formed teeth 24B via the insulator 26. Yes. On the other hand, the motor shaft 14 is disposed on the inner side in the radial direction of the core member 24, extends in the axial direction, and supports the rotor 16. The rotor 16 includes a rotor magnet 42 that is disposed to face the stator 12 in the radial direction. Therefore, when a voltage is applied to the winding 28, the rotor 16 rotates by receiving a rotating magnetic field from the stator 12. On the other hand, a second terminal member 50 is connected to the core member 24, and the second terminal member 50 is grounded to the ground portion 48. Thereby, even when a high voltage is applied to the winding 28 of the core member 24, the potential of the core member 24 is stabilized, so that an increase in electromagnetic noise can be suppressed.

  Such an action and effect can be obtained even when a high voltage of 200 V to 300 V is applied to the winding 28. Supplementally, while a blower motor for blowing air in a vehicle or an electric fan motor for cooling a radiator mounted on a normal vehicle has a specification of 12V or 24V, a drive motor of a hybrid vehicle or the like has a voltage of 200V to 300V. It is a high voltage specification. At present, this high voltage is converted by a circuit so as to be compatible with the 12V or 24V specification and applied to a blower motor or an electric fan motor. However, when these blower motors and electric fan motors are designed to be driven at a high voltage in the same manner as hybrid vehicle drive motors, the potential of the core member 24 (stator core) becomes unstable, which increases electromagnetic noise. . On the other hand, in the present embodiment, by connecting the second terminal member 50 to the core member 24 and grounding it, the potential of the core member 24 can be stabilized at a constant potential (grounding). Suppression is possible.

  Further, the second terminal member 50 is inserted between the support 30 of the center piece 18 and the core member 24 and is supported in contact with the inner peripheral surface of the core member 24. Thereby, the displacement of the second terminal member 50 can be suppressed by the center piece 18 and the core member 24. That is, it is possible to suppress the vibration when the motor is driven from being transmitted to the ground part 48 side (or the circuit board 20A side when the ground part 48 is on the circuit board 20A). For this reason, the stress to earth parts 48, such as an earth wire, is controlled.

  Further, the second terminal member 50 penetrates the flange portion 32 of the center piece 18 in a press-fit state. Thereby, the 2nd terminal member 50 can be easily hold | maintained by the to-be-inserted part (through-hole 32B) of the flange part 32 of the centerpiece 18. FIG.

  In addition, the center piece 18 is formed of resin, and the vibration of the second terminal member 50 is absorbed by the press-fit portion (through hole 32B) of the flange portion 32 of the center piece 18. Thereby, even if the core member 24 vibrates, the vibration transmitted to the ground part 48 via the second terminal member 50 can be suppressed.

[Second Embodiment]
Next , a second embodiment will be described. The second embodiment is an embodiment of the present invention. In the second embodiment, components that are substantially the same as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted.

Rotating electrical machine 60 according to the second embodiment Ru shown in FIGS. 5 and 6, to the rotary electric machine 10 according to the first embodiment described above (see FIGS. 1 to 4), is constructed as follows changes Has been.

  That is, as shown in FIG. 5, one end of the first terminal member 46 is press-fitted into a recess 26 </ b> A formed in the insulator 26, and in this state is connected to the end of the winding 28 (FIG. 3). reference). FIG. 6 shows a state where the insulator 26 of FIG. 5 is removed.

  On the other hand, as shown in FIG. 5, the insulator 26 is formed with a through hole 26 </ b> B so as to be juxtaposed with the recess 26 </ b> A, and one end of the second terminal member 50 passes through the through hole 26 </ b> B. As shown in FIG. 6, the core member 24 has a groove 62 for holding one end of the second terminal member 50, and the second terminal member 50 is inserted into the groove 62. The second terminal member 50 is supported in contact with the core member 24 by being press-fitted.

Next , the operation and effect of the second embodiment will be described with respect to differences from the first embodiment described above.

According to the rotating electrical machine 60 according to the second embodiment, as shown in FIGS. 5 and 6, one end of the second terminal member 50 is inserted into the through hole 26 </ b> B of the insulator 26 and the groove 62 of the core member 24. Therefore, the displacement of the second terminal member 50 can be suppressed by the through hole 26 </ b> B and the groove 62. Thus, even if the core member 24 vibrates when the motor is driven, the ground portion 48 side (see FIG. 1, when the ground portion 48 is provided on the circuit board 20A via the second terminal member 50, the circuit board 20A). Vibrations transmitted to the side) can be suppressed. Moreover, the emission resulting from the vibration of the second terminal member 50 is reduced.

Next , modified examples of the first and second embodiments will be described.

In the first and second embodiments, as shown in FIG. 7A, the second terminal member 50 has a saw-toothed uneven portion 64 at a portion passing through the through hole 32B of the center piece main body portion 18A. It may be formed. Then, the second terminal member 50 may be press-fitted into the through hole 32B of the center piece main body 18A so that the uneven portion 64 contacts the inner surface of the through hole 32B.

  Further, as shown in FIG. 7B, the second terminal member 50 in the first and second embodiments may be fixed to the peripheral edge portion of the through hole 32B of the centerpiece main body portion 18A by heat caulking. That is, the second terminal member 50 is formed with a recess 66 in a portion that penetrates the through hole 32B of the center piece main body 18A, and the center piece main body 18A has a peripheral portion of the through hole 32B on the circuit board 20A side. A projecting portion 68 that protrudes may be formed, and heat caulking may be performed so that the projecting portion 68 enters the recessed portion 66 (see the projecting portion 68 indicated by an imaginary line).

  In the modification shown in FIGS. 7A and 7B, the tip of the second terminal member 50 penetrates the circuit board 20A and is joined to the ground part 48 of the circuit board 20A by soldering. Has been. Even in such a configuration, since the center piece body 18A and the second terminal member 50 are firmly joined, the stress acting on the solder due to the vibration on the core member 24 (see FIG. 1) side. Can be suppressed.

  In addition, the second terminal member 50 in the first and second embodiments may be made of a spring-like alloy (beryllium copper or the like) as a material. Also by this, it is possible to suppress the stress on the ground portion 48 caused by the vibration of the core member 24 (see FIG. 1) (vibration by driving the motor). Therefore, the reliability of the joint portion between the core member 24 and the ground portion 48 is increased.

  Further, as shown in FIG. 8, the second terminal member 50 in the first and second embodiments has a bellows-shaped portion (wave-shaped portion) 50A or a twist-shaped portion that functions as a vibration damping portion at an intermediate portion in the connecting direction. 50B may be formed. According to this, the vibration of the core member 24 (see FIG. 1) (vibration due to motor driving) passes between the second terminal member 50 and the ground portion 48 (see FIGS. 1 and 7) via the second terminal member 50. Even if transmitted to the joint, the vibration is attenuated and transmitted. For this reason, the stress to the junction part of the 2nd terminal member 50 and the earthing | grounding part 48 (refer FIG. 1, FIG. 7) is suppressed, and the reliability of the said junction part increases.

  Moreover, although illustration is abbreviate | omitted, the 2nd terminal member 50 as a electrically-conductive member shown by FIG. 1 etc. is fixed with respect to the core member 24 by heat caulking, welding, adhesion | attachment etc. as a modification of the said embodiment. May be.

  Further, as a modification of the above-described embodiment, a part of the second terminal member 50 as a conductive member is firmly fixed with a screw or the like to a structurally fixed member (part which can be regarded as a rigid body). Also good. Even with such a structure, it is possible to suppress the vibration of the core member 24 (vibration caused by the motor drive) from being transmitted to the ground portion 48 and its joint portion. Therefore, the stress to the earth part 48 resulting from the vibration of the core member 24 is suppressed.

[Third embodiment]
Next , a third embodiment will be described. The third embodiment is not an embodiment of the present invention but a reference example. In the third embodiment, components that are substantially the same as those of the first embodiment are denoted by the same reference numerals and description thereof is omitted.

Rotating electrical machine 70 according to the third embodiment Ru shown in Figure 9, with respect to the rotating electrical machine 10 according to the first embodiment described above (see FIGS. 1 to 4), the following configuration has been changed .

  That is, as shown in FIG. 9, the second terminal member 72 as a metal conductive member is constituted by a coil spring which is an elastic member instead of the second terminal member 50 (see FIG. 1 and the like) of a bent plate material. Has been. The second terminal member 72 has one end in contact with the ground portion 48 and the other end in contact with the facing portion 74 of the core member 24 facing the ground portion 48. The contact state is maintained by the force to be extended). That is, the ground part 48 and the core member 24 are electrically connected by the second terminal member 72.

  The ground portion 48 is a ground pattern on the circuit board 20A as an example. Further, the core member 24 that is a laminated body of iron thin plates is covered with the non-conductive insulator 26 in the portion wound by the winding 28, but the facing portion 74 of the core member 24 facing the ground portion 48 is The exposed metal portion is not covered with the insulator 26.

  In addition, a guide wall portion 76 as a guide portion that supports the side surface of the second terminal member 72 is integrally formed on the outer peripheral portion of the support column portion 30 in the center piece 18. The guide wall portion 76 is set on the outer peripheral portion of the support column portion 30 closer to the ground portion 48 than the core member 24 (upper side in FIG. 9). Further, the guide wall portion 76 extends outward in the radial direction of the support column 30 and extends along the axial direction of the support column 30 so as to sandwich the second terminal member 72. 76A and a second guide portion 76B that connects the distal end portions of the pair of first guide portions 76A in the protruding direction. In FIG. 9, only the first guide portion 76A on the back side in the drawing of the pair of first guide portions 76A is illustrated by a background line.

  The first guide portion 76 </ b> A and the second guide portion 76 </ b> B are both rectangular wall portions and are formed continuously with the flange portion 32 of the center piece 18. The inner space formed between the guide wall portion 76 and the support column portion 30 is set at a position continuous with the inner space of the through hole 32 </ b> B in the flange portion 32.

  Also with the configuration of the present embodiment, the potential of the core member 24 is stabilized, so that an increase in high-frequency electromagnetic noise can be suppressed even when the rotating electrical machine 70 that is a brushless motor is driven at a high voltage. Thereby, it is possible to suppress, for example, influence on radio reception and the like. Moreover, the buckling of the second terminal member 72 is suppressed by providing the guide wall portion 76.

As a modification of the third embodiment (a reference example that is not an embodiment of the present invention) , the guide portion that supports the side surface of the second terminal member 72 is configured by only a pair of first guide portions 76A, for example. Also good. In the third embodiment, the second terminal member 72 as a conductive member is configured by a coil spring. However, as a modification of the third embodiment (a reference example that is not an embodiment of the present invention) , a conductive member Instead of the coil spring, it may be constituted by a plate spring which is a metal elastic member. That is, one end of such a leaf spring contacts the ground portion 48, the other end of the leaf spring contacts a portion 74 of the core member 24 facing the ground portion 48, and the leaf spring further contacts the ground portion 48. And the structure which maintains a contact state with an elastic force with respect to the core member 24 may be sufficient. In addition, as another modified example of the third embodiment (a reference example that is not an embodiment of the present invention) , a configuration in which the first guide portion 76A is not continuous with the flange portion 32 of the center piece 18 can be employed. A configuration in which the guide portion 76B is not continuous with the flange portion 32 of the center piece 18 may be employed.

Further, as another modified example of the third embodiment (a reference example that is not an embodiment of the present invention) , the guide portion that supports the side surface of the second terminal member 72 protrudes outward in the radial direction of the column portion 30, for example. It may be a guide portion that is disposed on both sides of the second terminal member 72 and that is intermittently (non-continuously) set along the axial direction of the support column 30.

Furthermore, as another modified example of the third embodiment, the core member 24 forms an insertion space between the column portion 30 on the side facing the ground portion 48 and a facing surface (facing the ground portion 48). Part) may be formed. That is, the portion of the second terminal member 72 on the core member 24 side is inserted into the insertion space and supported in contact with the inner peripheral surface of the core member 24, and the second terminal member 72 is on the core member 24 side. Of the core member 24 is in contact with the surface (facing portion) of the core member 24 facing the ground portion 48, and the second terminal member 72 is elastic with respect to the ground portion 48 and the core member 24. in Ri also der be configured such as to maintain the contact state, the configuration according to this modification, an example embodiment of the present invention.

Furthermore, as another modified example of the third embodiment (a reference example that is not an embodiment of the present invention) , a groove portion is formed in a portion 74 of the core member 24 facing the ground portion 48, and the second terminal member 72. The core member 24 may be inserted into the groove and supported by the core member 24 in a contact state. That is, the second terminal member 72 has one end in contact with the ground portion 47 and the other end in contact with the bottom surface of the groove portion of the facing portion 74 of the core member 24 facing the ground portion 48. 24 may be in contact with the elastic force.

  In addition, the rotary electric machine in this invention may be used for uses other than the use illustrated in the said embodiment. Moreover, the said embodiment and the above-mentioned some modification can be implemented combining suitably.

  Although an example of the present invention has been described above, the present invention is not limited to the above, and it is needless to say that various modifications can be made without departing from the spirit of the present invention. .

DESCRIPTION OF SYMBOLS 10, 60, 70 ... Rotary electric machine, 12 ... Stator, 14 ... Motor shaft (rotary shaft member), 16 ... Rotor, 18 ... Centerpiece, 24 ... Core member, 24B ... Teeth part, 26 ... Insulator, 28 ... Winding, 30 ... Strut part, 32 ... Flange part, 32B ... Through-hole (press-fit part), 42 ... Rotor Magnet, 48... Earth part, 50, 72... Second terminal member (conductive member), 62... Groove part, 76... Guide wall part (guide part)

Claims (6)

A stator having a core member configured in a ring and having a plurality of teeth portions formed radially, and a winding wound around each of the plurality of teeth portions via an insulator;
A rotating shaft member disposed on the radially inner side of the core member and extending along the central axis direction of the core member;
A rotor supported by the rotary shaft member and having a rotor magnet disposed in a radial direction opposite to the stator;
A conductive member connected to the core member and grounded to the ground portion;
A center piece disposed on the radially inner side of the core member as a support portion and supporting the core member;
Equipped with a,
The rotating electrical machine , wherein the conductive member is inserted between the support portion of the center piece and the core member, and is supported in contact with the inner peripheral surface of the core member . A stator having a core member configured in a ring and having a plurality of teeth portions formed radially, and a winding wound around each of the plurality of teeth portions via an insulator;
A rotating shaft member disposed on the radially inner side of the core member and extending along the central axis direction of the core member;
A rotor supported by the rotary shaft member and having a rotor magnet disposed in a radial direction opposite to the stator;
A conductive member connected to the core member and grounded to the ground portion;
A center piece disposed on the radially inner side of the core member serves as a support column and supports the core member, and a center piece having a flange portion extended from one axial end of the support column,
Equipped with a,
The rotating electrical machine , wherein the conductive member passes through the flange portion of the center piece in a press-fitted state . The rotating electrical machine according to claim 2 , wherein the center piece is made of resin, and the vibration of the conductive member is absorbed by a press-fit portion into which the conductive member is press-fitted in the flange portion. The rotating electrical machine according to claim 2 or 3, wherein the conductive member is inserted into a groove formed in the core member and is supported in contact with the core member. The conductive member has one end in contact with the ground portion and the other end in contact with a portion of the core member facing the ground portion, and is in contact with the ground portion and the core member by an elastic force. Consists of elastic members to keep
Wherein the outer peripheral portion of the pillar portion is formed guide portion for supporting the side surface of the elastic member, the rotary electric machine according to claim 1, wherein. The rotating electrical machine according to any one of claims 1 to 5 , wherein the rotor rotates in a state where a voltage of 200V to 300V is applied to the winding.

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