WO2019064793A1 - Moteur - Google Patents

Moteur Download PDF

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Publication number
WO2019064793A1
WO2019064793A1 PCT/JP2018/025400 JP2018025400W WO2019064793A1 WO 2019064793 A1 WO2019064793 A1 WO 2019064793A1 JP 2018025400 W JP2018025400 W JP 2018025400W WO 2019064793 A1 WO2019064793 A1 WO 2019064793A1
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WO
WIPO (PCT)
Prior art keywords
capacitor
heat sink
recess
heat
motor
Prior art date
Application number
PCT/JP2018/025400
Other languages
English (en)
Japanese (ja)
Inventor
佳明 山下
小川　裕史
和則 増渕
一樹 原田
Original Assignee
日本電産株式会社
日本電産エレシス株式会社
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 日本電産株式会社, 日本電産エレシス株式会社 filed Critical 日本電産株式会社
Priority to CN201880053461.1A priority Critical patent/CN111033976B/zh
Publication of WO2019064793A1 publication Critical patent/WO2019064793A1/fr

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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K11/00—Structural association of dynamo-electric machines with electric components or with devices for shielding, monitoring or protection
    • H02K11/30—Structural association with control circuits or drive circuits
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K21/00—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/12—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets
    • H02K21/14—Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with stationary armatures and rotating magnets with magnets rotating within the armatures

Definitions

  • the present invention relates to a motor.
  • a heat generating element such as a capacitor having a large amount of heat generation is accommodated inside the housing to dissipate heat.
  • a configuration in which an electrolytic capacitor is housed in a step provided in a heat sink of an electronic controller unit (ECU) housing is disclosed (Patent Document 1).
  • the conventional motor does not pay attention to the difference in the amount of heat generation depending on the position of the capacitor, so it can dissipate the heat from the capacitor, but the volume of the heat sink and the amount of heat dissipation material used increase, which may increase the cost of the motor .
  • One aspect of the motor of the present invention includes a motor body having a rotor and a stator, and a columnar capacitor electrically connected to the motor body and extending along a first direction, the motor body comprising the capacitor A heat sink opposed to the side surface of the capacitor, and a heat dissipating material in contact with a part of the side surface of the capacitor and the heat sink, the side surface of the capacitor having a first region in contact with the heat dissipating material;
  • One area is a part of the side surface of the capacitor and is an area including the central portion in the first direction of the side surface of the capacitor.
  • a motor capable of reducing the volume of a heat sink and the use amount of a heat dissipating material while dissipating heat from a capacitor, thereby reducing the cost of the motor.
  • FIG. 1 is a plan view of a motor of the embodiment.
  • FIG. 2 is a perspective view of the motor of FIG. 1 with the cover 40 removed from the housing 50.
  • FIG. 3 is a cross-sectional view of the motor taken along line II-II of FIG.
  • FIG. 4 is a cross-sectional view of the motor in which the region XI of FIG. 3 is enlarged.
  • FIG. 5 is a cross-sectional view showing a first modification of the motor of FIG.
  • FIG. 6 is a cross-sectional view showing a second modification of the motor of FIG.
  • FIG. 7 is a cross-sectional view showing a third modification of the motor of FIG.
  • FIG. 8 is a cross-sectional view showing a fourth modification of the motor of FIG. FIG.
  • FIG. 9 is a cross-sectional view showing a fifth modification of the motor of FIG.
  • FIG. 10 is a cross-sectional view showing a sixth modification of the motor of FIG.
  • FIG. 11 is a cross-sectional view showing a seventh modification of the motor of FIG.
  • FIG. 12 is a cross-sectional view showing an eighth modification of the motor of FIG.
  • FIG. 13 is a cross-sectional view showing a ninth modification of the motor of FIG.
  • FIG. 14 is a cross-sectional view showing a tenth modification of the motor of FIG.
  • FIG. 15 is a cross-sectional view showing an eleventh modification of the motor of FIG.
  • FIG. 16 is a cross-sectional view showing a twelfth modification of the motor of FIG. FIG.
  • FIG. 17 is a cross-sectional view showing a thirteenth modification of the motor of FIG.
  • FIG. 18 is a cross-sectional view showing a fourteenth modification of the motor of FIG. 1
  • FIG. 19 is a cross-sectional view showing a fifteenth modified example of the motor of FIG. 1;
  • an XYZ coordinate system is shown as a three-dimensional orthogonal coordinate system as appropriate.
  • the direction is parallel to the axial direction of the central axis J described later.
  • the X-axis direction is a direction orthogonal to the Z-axis direction.
  • the Y-axis direction is orthogonal to both the X-axis direction and the Z-axis direction.
  • the positive side (+ Z side) in the Z-axis direction is referred to as "upper side”
  • the negative side (-Z side) in the Z-axis direction is referred to as "lower side”.
  • the upper side and the lower side are names used merely for explanation, and do not limit the actual positional relationship or direction.
  • a direction (Z-axis direction, first direction) parallel to the central axis J is simply referred to as “axial direction”
  • a radial direction centered on the central axis J is simply referred to as “radial direction”.
  • the circumferential direction around the central axis J that is, around the axis of the central axis J, is simply referred to as “circumferential direction”.
  • plan view means a state viewed from the axial direction.
  • the “other side” is a direction away from the substrate, and the “one side” is a direction approaching the substrate.
  • the “one side in the first direction” may be the upper side of a motor described later with respect to the circuit board (substrate) or the lower side of the motor.
  • FIG. 1 is a plan view of a motor 1 of the present embodiment.
  • FIG. 2 is a perspective view of the motor 1 in a state in which the cover 40 is removed from the housing 50 described later.
  • FIG. 3 is a cross-sectional view of the motor 1 taken along the line II-II of FIG.
  • FIG. 4 is a cross-sectional view of the motor 1 in which the region XI of FIG. 3 is enlarged.
  • FIG. 5 is a cross-sectional view showing a first modified example of the motor 1.
  • FIG. 6 is a cross-sectional view showing a second modification of the motor 1.
  • FIG. 7 is a cross-sectional view showing a third modification of motor 1.
  • FIG. 8 is a cross-sectional view showing a fourth modification of motor 1.
  • FIG. 1 is a plan view of a motor 1 of the present embodiment.
  • FIG. 2 is a perspective view of the motor 1 in a state in which the cover 40 is removed from the housing 50 described later.
  • FIG. 3
  • FIG. 9 is a cross-sectional view showing a fifth modification of motor 1.
  • FIG. 10 is a cross-sectional view showing a sixth modification of motor 1.
  • FIG. 11 is a cross-sectional view showing a seventh modification of motor 1.
  • FIG. 12 is a cross-sectional view showing an eighth modification of the motor 1.
  • FIG. 13 is a cross-sectional view showing a ninth modification of motor 1.
  • FIG. 14 is a cross-sectional view showing a tenth modification of motor 1.
  • FIG. 15 is a cross-sectional view showing an eleventh modification of motor 1.
  • FIG. 16 is a cross-sectional view showing a twelfth modification of the motor 1.
  • FIG. 17 is a cross-sectional view showing a thirteenth modification of motor 1.
  • FIG. 18 is a cross-sectional view showing a fourteenth modified example of the motor 1.
  • FIG. 19 is a cross-sectional view showing a fifteenth modified example of the motor 1. 5 to 19 correspond to cross-sectional views of the motor in which the region XI of FIG. 3 is enlarged.
  • the motor 1 includes a motor body 2, a housing 50, a control unit 3, an upper bearing 7A, and a lower bearing 7B.
  • the motor body 2 has a rotor 20 and a stator 25.
  • the rotor 20 rotates about a central axis J extending along the vertical direction.
  • the rotor 20 has a shaft 21, a rotor core 22, and a rotor magnet 23.
  • the shaft 21 extends along the central axis J.
  • the shaft 21 is rotatably supported around the central axis J by the upper bearing 7A and the lower bearing 7B.
  • the rotor core 22 is fixed to the shaft 21.
  • the rotor core 22 circumferentially surrounds the shaft 21.
  • the rotor magnet 23 is fixed to the rotor core 22. More specifically, the rotor magnet 23 is fixed to the outer surface of the rotor core 22 along the circumferential direction.
  • the rotor core 22 and the rotor magnet 23 rotate with the shaft 21.
  • the stator 25 is located radially outward of the rotor 20.
  • the stator 25 faces the rotor 20 in the radial direction via a gap, and surrounds the radially outer side of the rotor 20.
  • the stator 25 has a stator core 27, an insulator 28 and a coil 29.
  • the insulator 28 is made of an insulating material.
  • the insulator 28 covers at least a part of the stator core 27.
  • the coil 29 excites the stator core 27.
  • the coil 29 is configured by winding a coil wire (not shown). The coil wire is wound around the teeth portion of the stator core 27 through the insulator 28.
  • the end of the coil wire is drawn upward, passes through a through hole provided in the bearing holder 30, and is connected to the circuit board (substrate) 60.
  • the circuit board (substrate) 60 When a bus bar is provided between the motor body 2 and the bearing holder 30, the end of the coil wire is connected to the bus bar and the bus bar is connected to the circuit board 60.
  • the upper bearing 7A rotatably supports the upper end portion of the shaft 21.
  • the upper bearing 7A is located above the stator 25.
  • the upper bearing 7A is supported by the bearing holder 30.
  • the lower bearing 7B rotatably supports the lower end portion of the shaft 21.
  • the lower bearing 7B is located below the stator 25.
  • the lower bearing 7 B is supported by the lower bearing holding portion 53 of the housing 50.
  • the upper bearing 7A and the lower bearing 7B are ball bearings.
  • the types of the upper bearing 7A and the lower bearing 7B are not particularly limited, and may be other types of bearings.
  • the housing 50 accommodates the motor body 2. That is, the housing 50 accommodates the rotor 20 and the stator 25.
  • the housing 50 is in the form of a tube that opens to the upper side (+ Z side).
  • the housing 50 has a cylindrical portion 51, a bottom portion 52, and a lower bearing holding portion 53.
  • the housing 50 may be a cylindrical member not having the bottom 52. In this case, a bearing holder 30 for holding a bearing is separately attached to the lower opening of the housing 50.
  • the cylindrical portion 51 surrounds the stator 25 from the radially outer side.
  • the cylindrical portion 51 is cylindrical.
  • the stator core 27 and the bearing holder 30 are fixed to the inner peripheral surface of the cylindrical portion 51.
  • the bottom portion 52 is located at the lower end of the cylindrical portion 51.
  • the bottom 52 is located below the stator 25.
  • the lower bearing holding portion 53 is located at the center of the bottom portion 52 in plan view.
  • the lower bearing holder 53 holds the lower bearing 7B.
  • a hole 53a penetrating in the axial direction is provided at the center of the lower bearing holding portion 53 in a plan view. The lower end portion of the shaft 21 is inserted into the hole 53a.
  • control unit 3 includes a circuit board 60, a housing 4, and a heat sink 80. Further, as shown in FIG. 2, the control unit 3 has a connector 70.
  • the housing 4 accommodates the circuit board 60 and the heat sink 80.
  • the housing 4 has a bearing holder 30 and a lid 40.
  • the bearing holder 30 is located below the circuit board 60 and the heat sink 80 and covers the circuit board 60 and the heat sink 80 from the lower side.
  • the lid 40 covers the circuit board 60 and the heat sink 80 from the upper side.
  • the bearing holder 30 is located on the upper side (+ Z side) of the stator 25.
  • the bearing holder 30 supports the upper bearing 7A.
  • the bearing holder 30 is positioned at the opening 51 a on the upper side of the cylindrical portion 51 of the housing 50, and is fixed to the inner peripheral surface of the cylindrical portion 51.
  • the bearing holder 30 is made of a metal material having high heat dissipation characteristics and sufficient rigidity.
  • the bearing holder 30 is made of an aluminum alloy.
  • the bearing holder 30 is manufactured by cutting a surface requiring accuracy after forming a schematic shape by die casting or the like.
  • the bearing holder 30 includes a disk-shaped holder body portion 31, an upper bearing holding portion 32 positioned radially inward of the holder body portion 31, and a holder fixing portion 33 positioned radially outward of the holder body portion 31. And a lower heat sink portion 34.
  • the upper bearing holder 32 holds the upper bearing 7A.
  • the upper bearing holder 32 is located at the center of the bearing holder 30 in plan view.
  • the holder fixing portion 33 has a cylindrical shape that protrudes downward from the outer peripheral edge of the holder body 31 in the radial direction.
  • the outer peripheral surface of the holder fixing portion 33 radially faces the inner peripheral surface of the cylindrical portion 51 of the housing 50.
  • the holder fixing portion 33 is fitted and fixed to the inner peripheral surface of the cylindrical portion 51.
  • the lower heat sink portion 34 extends along a horizontal direction (a direction orthogonal to the central axis J) from a partial region of the upper bearing holding portion 32 in the circumferential direction.
  • the lower heat sink portion 34 extends along the circuit board 60 below the circuit board 60.
  • the lower heat sink portion 34 has a heat radiating surface 39 facing upward. That is, the bearing holder 30 has a heat dissipation surface 39.
  • the heat dissipation surface 39 extends along the circuit board 60.
  • the heat dissipation surface 39 contacts the lower surface 61 c of the substrate body 61 of the circuit board 60 directly or indirectly via an interposed member such as a heat dissipation material.
  • the lower heat sink portion 34 absorbs heat from the circuit board 60 at the heat dissipation surface 39 to cool the circuit board 60.
  • the circuit board 60 has a plurality of field effect transistors 66 and a plurality of capacitors 65 mounted on the upper surface 61 d of the substrate body 61.
  • the field effect transistor 66 is a heating element that easily generates heat in the circuit board 60. As viewed in the axial direction, at least a portion of the field effect transistor 66 and the capacitor 65 overlap the heat dissipation surface 39. Thus, the heat generated by the field effect transistor 66 and the capacitor 65 can be effectively transferred to the lower heat sink portion 34 at the heat dissipation surface 39. As a result, the temperature of the field effect transistor 66 can be prevented from rising excessively, and the operation reliability of the field effect transistor 66 can be improved.
  • the bearing holder 30 has an upper surface 30 a facing upward.
  • the upper surface 30 a faces the lid 40 in the vertical direction.
  • the upper surface 30a is provided with a recess 35 extending along the outer edge of the upper surface 30a.
  • the recessed groove portion 35 is recessed downward with respect to the upper surface 30 a.
  • the recessed groove portion 35 extends in a plane orthogonal to the central axis J with a uniform width and a uniform depth to surround the central axis J.
  • the recessed groove portion 35, the convex portion 42 of the cover 40 to be described in the later stage is accommodated.
  • the circuit board 60 is located above the bearing holder 30.
  • the circuit board 60 extends in a direction orthogonal to the central axis J (that is, a direction orthogonal to the vertical direction).
  • a coil wire extending from the coil 29 of the stator 25 is connected to the circuit board 60.
  • the circuit board 60 supplies a current to the coil 29 to control the rotation of the rotor 20.
  • the circuit board 60 includes a substrate body 61, a plurality of capacitors 65, and a plurality of field effect transistors 66.
  • the substrate main body 61 further includes electronic components (not shown) for controlling the rotation of the rotor 20.
  • the substrate body 61 is disposed to be orthogonal to the axial direction (ie, the vertical direction). In the present embodiment, the substrate body 61 is fixed to the bearing holder 30 by the fixing screw 68 .
  • the substrate main body 61 has an upper surface 61 d facing upward and a lower surface 61 c facing downward.
  • the capacitor 65 and the field effect transistor 66 are mounted on the upper surface 61 d of the substrate body 61.
  • the capacitor 65 has the largest dimension in the axial direction (vertical direction) among the mounted components of the circuit board 60. That is, the motor 1 includes a columnar capacitor 65 electrically connected to the motor body 2 through the circuit board 60 and extending along the Z direction. The capacitor 65 extends upward from the circuit board 60.
  • the field effect transistor 66 has a rectangular shape in plan view.
  • the field effect transistor 66 is also referred to as a FET (field effect transistor).
  • electronic components such as a rotation sensor and a choke coil are mounted on one or both of the upper surface 61 d and the lower surface 61 c of the substrate main body 61.
  • the electronic components such as the capacitor 65 and the field effect transistor 66 may be mounted on a board (for example, a two-sheet board) different from the circuit board 60 as long as they can be electrically connected to the motor body 2.
  • the heat sink 80 is located on the upper side of the circuit board 60.
  • the heat sink 80 covers a part of the circuit board 60 from the upper side.
  • the heat sink 80 of the present embodiment is in contact with the circuit board 60 and functions as a heat sink for cooling the circuit board 60.
  • the heat sink 80 may be in direct contact with the circuit board 60 or may be in indirect contact as long as the heat sink 80 is in thermal contact with the circuit board 60 to cool the circuit board 60. More specifically, the heat sink 80 may be in contact with the circuit board 60 via a heat dissipating material such as heat dissipating grease.
  • the heat sink 80 is made of a metal material (for example, an aluminum alloy or a copper alloy) having high heat dissipation characteristics.
  • the heat sink 80 is fixed to the lower heat sink portion 34 of the bearing holder 30 by a fixing screw 68 (not shown).
  • the heat sink 80 and the bearing holder 30 are in direct contact with each other at the fixed portion. Fixing the heat sink 80 and the bearing holder 30 in contact with each other causes heat transfer between the heat sink 80 and the bearing holder 30. For this reason, when either one of the heat sink 80 and the bearing holder 30 becomes high temperature, the heat can be moved to the other side and the heat can also be radiated from the other side. As a result, the heat radiation efficiency is enhanced, and as a result, the cooling effect of the circuit board 60 can be enhanced.
  • the heat sink 80 is located directly above the field effect transistor 66 which is a heat generating element. That is, the heat sink 80 overlaps with at least a part of the field effect transistor 66 when viewed in the axial direction.
  • the heat sink 80 and the field effect transistor 66 are vertically opposed to each other with a gap.
  • a heat dissipating material such as a heat dissipating grease is disposed, for example.
  • the heat sink 80 is preferably the same member as the lower heat sink portion 34.
  • the heat sink 80 and the lower heat sink part 34 are formed of the same member, the heat transfer generated by the field effect transistor 66 becomes smooth and the heat radiation effect is enhanced, and the heat sink 80 is fixed to the lower heat sink part 34
  • the fixing screw 68 is not required, and the motor 1 can be miniaturized.
  • the heat sink 80 is provided with a capacitor accommodation hole 81 penetrating in the vertical direction. As shown in FIG. 3, inside the capacitor accommodation hole 81, a capacitor 65, which is a heating element, is accommodated.
  • the inner circumferential surface of the capacitor housing hole 81 faces the side surface of the capacitor 65. That is, the inner circumferential surface of the capacitor housing hole 81 surrounds the side surface of the capacitor 65.
  • a lid 40 described later covers the heat sink 80 and the capacitor 65 from above.
  • the side surface 65 a of the capacitor 65 has a first region 121 in contact with the heat dissipation material 90.
  • the capacitor 65 is a heating element that easily generates a large amount of heat in the circuit board 60 as compared to the field effect transistor 66 and other electronic components.
  • the central portion 120 hereinafter simply referred to as the “central portion 120” in the longitudinal direction (Z direction in FIG. 4) of the columnar capacitor 65, a large amount of heat is generated compared to the surroundings.
  • the first area 121 is a part of the side surface 65 a of the capacitor 65, and is an area including the central portion 120 in the Z direction of the side surface 65 a of the capacitor 65. In the past, the heat radiation focused on the heat generation portion of the capacitor 65 was not performed.
  • the side surface 65a of the capacitor 65 is in contact with the heat dissipation material 90 in the first region 121 including at least the central portion 120 that generates more heat than the other portions as described above. Furthermore, in the side surface 65 a of the capacitor 65, the region other than the first region 121 does not contact the heat dissipation material 90. As a result, the heat from the capacitor 65 can be dissipated efficiently, the volume of the heat sink 80 and the amount of use of the heat dissipation material 90 can be suppressed, and the cost of the motor 1 can be reduced.
  • the side surface 65 a of the capacitor 65 has a second region 122 up to the end 65 s below the central portion 120 (one side in the first direction). That is, the inner circumferential surface of the capacitor housing hole 81 of the heat sink 80 faces the second region 122. Since the heat sink 80 faces the second area 122 of the side surface 65a of the capacitor 65, the heat sink 90 can easily stay in the second area 122 even if the heat sink 90 leaks out from the heat sink containing recess 130, stabilizing the arrangement of the heat sink. it can.
  • the side surface 65 a of the capacitor 65 further includes a third region 123 up to the end 65 t above the central portion 120 (the other side in the first direction).
  • a heat dissipation material accommodation recess 130 recessed in the X direction is provided on the upper side of the inner peripheral surface of the capacitor accommodation hole 81. That is, the motor body 2 has the heat dissipation material accommodation recess 130 in the X direction orthogonal to the side surface 65 a of the capacitor 65 at the boundary between the heat sink 80 and the lid 40 in the Z direction. Further, the central portion 120 of the capacitor 65 and the heat sink containing recess 130 face each other.
  • the lid 40 is located above the bearing holder 30, the circuit board 60 and the heat sink 80.
  • the lid 40 covers the upper side of the circuit board 60 and protects the circuit board 60.
  • the lid 40 has a flat plate 45 extending in a direction orthogonal to the axial direction, and an outer edge 46 located at the outer edge of the flat 45 and projecting downward with respect to the flat 45. And a connector holder portion 47 extending upward from the flat plate portion 45.
  • the connector holder portion 47 has a tubular shape extending upward from the flat plate portion 45.
  • the external connection terminal 73 of the connector 70 is disposed inside the connector holder portion 47.
  • the external connection terminal 73 is connected to an external device (not shown) that supplies power to the circuit board 60.
  • the flat plate portion 45 extends in a direction orthogonal to the axial direction (vertical direction). That is, the flat plate portion 45 extends along the circuit board 60.
  • the outer edge portion 46 protrudes downward from the outer edge of the flat plate portion 45.
  • the outer edge portion 46 surrounds the flat plate portion 45 over the entire circumference when viewed from the axial direction.
  • a convex portion 42, an inner lower end surface 46a and an outer lower end surface 46b are provided.
  • the convex portion 42 protrudes downward.
  • the convex portion 42 extends in a plane perpendicular to the central axis J with a uniform width and a uniform height.
  • the protrusion 42 extends over the entire outer edge 46. Therefore, the convex portion 42 surrounds the flat plate portion 45 over the entire circumference when viewed from the axial direction.
  • the convex portion 42 is accommodated in the concave groove portion 35 provided in the bearing holder 30.
  • a gap is provided between the inner wall surface of the recessed groove portion 35 and the convex portion 42.
  • the adhesive B is filled in the recessed groove portion 35.
  • the convex portion 42 is accommodated in the concave groove portion 35 filled with the adhesive B. For this reason, it is possible to suppress water and contamination from entering between the lid 40 and the bearing holder 30 into the interior of the motor 1.
  • a moisture-curable adhesive as the adhesive B filled in the recessed groove portion 35.
  • Moisture-curable adhesives cure with moisture in the air.
  • the outer lower end surface 46b is a surface facing downward.
  • the outer lower end surface 46b is located inside the area surrounded by the convex portion 42 in a plan view.
  • the outer lower end surface 46 b contacts the upper surface 30 a of the bearing holder 30.
  • the lid 40 can be positioned in the axial direction (vertical direction) with respect to the bearing holder 30.
  • the inner lower end surface 46 a is a surface facing downward.
  • the inner lower end surface 46 a is located inside the area surrounded by the convex portion 42 in a plan view.
  • the inner lower end surface 46 a is axially separated from the upper surface 30 a of the bearing holder 30.
  • the adhesive B filled in the recessed groove 35 can be exposed to the air to accelerate the curing of the adhesive B.
  • the adhesive B overflowing from the concave groove portion 35 can be accumulated in the gap between the inner lower end surface 46a and the upper surface 30a of the bearing holder 30. Therefore, when the filling amount of the adhesive B varies, the excess adhesive B can be released to the gap between the inner lower end surface 46 a and the upper surface 30 a of the bearing holder 30.
  • a capacitor facing recess 49 is provided on the inner lower end surface 46 a at a position facing the heat sink 80. That is, the lid 40 includes the capacitor facing recess 49.
  • the inner wall surface of the capacitor facing recess 49 faces the third region 123 of the side surface 65 a of the capacitor 65 and the top surface 65 b of the capacitor 65. That is, the motor main body 2 includes the lid 40 facing the third region 123 of the side surface 65 a of the capacitor 65.
  • the lid 40 faces the third region 123 of the side surface 65a of the capacitor 65, and the heat sink 80 faces the second region 122 of the side surface 65a of the capacitor 65 as described in the previous step, thereby confining the capacitor 65 and dissipating the heat 90 leaks can be suppressed.
  • a heat dissipating material 90 such as heat dissipating grease is accommodated between the inner peripheral surface of the capacitor accommodating hole 81 and the side surface 65 a of the capacitor 65.
  • heat dissipating material 90 heat can be efficiently transferred from the side surface of the capacitor 65 toward the heat sink 80.
  • the heat generated in the capacitor 65 can be transferred to the heat sink 80 to cool the capacitor 65. That is, the motor body 2 has the heat sink 80 opposed to the side surface 65 a of the capacitor 65, and the heat dissipation material 90 in contact with a part of the side surface 65 a of the capacitor 65 and the heat sink 80.
  • a fifth recess 135 is provided in the surface 80b facing the upper side of the heat sink 80 on the side of the capacitor 65 so as to be recessed downward.
  • the heat sink containing recess 130 is configured by the fifth recess 135 and the inner lower end surface (surface facing toward one side in the first direction) 46 a of the lid 40.
  • a part of the heat dissipating material 90 is disposed inside the heat dissipating material accommodation recess 130. Since the heat dissipating material 90 is disposed in the housing recess 130, the arrangement of the heat dissipating material 90 can be stabilized. Can be suppressed from entering the motor main body.
  • the heat dissipating material 90 contacts at least the central portion 120 having a large amount of heat generation, so that the heat from the capacitor 65 is efficiently dissipated, and the heat dissipating material 90 contacts the entire side surface 65 a and the top surface 65 b Also, the amount of heat dissipation material 90 used can be reduced. Further, since the heat sink 80 faces only the first region 121 of the side surface 65a of the capacitor 65, the heat from the capacitor 65 transmitted through the heat dissipation material 90 is efficiently dissipated while the side surface 65a and the top surface 65b of the capacitor 65 are The amount of heat dissipation material 90 used can be reduced compared to the case of contacting the whole.
  • the heat dissipation material accommodation recess 130 may be recessed toward the lid 40 at the boundary between the heat sink 80 and the lid 40. That is, in the first modification, a sixth recess 136 that is recessed upward is provided on the inner lower end surface 46 a of the lid 40 on the capacitor 65 side.
  • the heat sink containing recess 130 is provided by the sixth recess 136 and the surface 80 b facing the upper side of the heat sink 80.
  • part of the heat dissipation material 90 is disposed inside the heat dissipation material accommodation recess 130. Since the heat dissipating material 90 is disposed in the heat dissipating material accommodation recess 130, the arrangement of the heat dissipating material 90 can be stabilized.
  • the heat sink 80 may have a first recess 131 recessed on the lower side (one side in the first direction) on the surface 80 b facing the upper side (the other side in the first direction).
  • the first recess 131 constitutes at least a part of the heat dissipation material accommodation recess 130, and in the second modification, constitutes a lower portion of the heat dissipation material accommodation recess 130 and a portion parallel to the X direction.
  • the lid 40 has a first projection 141 that protrudes to the lower side (one side in the first direction) of the capacitor 65 on the inner lower end face (the side facing the one side in the first direction) 46 a.
  • the first protrusion 141 is fitted into the first recess 131 of the heat sink 80.
  • the heat dissipation material accommodation recess 130 is formed between the heat sink 80 and the lid 40 on the capacitor 65 side of the first protrusion 141. That is, the heat dissipation material 90 is disposed so as to be surrounded by the first recess 131 and the first protrusion 141. Since the heat dissipation material 90 is disposed so as to be surrounded by the first recess 131 and the first protrusion 141, the heat dissipation material 90 can be prevented from entering the motor main body by the labyrinth structure.
  • the heat sink 80 has a first recess 131, and in the third modification, the first recess 131 is a portion below the heat sink containing recess 130 and parallel to the X direction; It constitutes an opposing side and a portion parallel to the Z direction.
  • the lid 40 has a first protrusion 141 on the inner lower end surface 46 a.
  • the first protrusion 141 constitutes a portion above the heat dissipation material accommodation recess 130 and parallel to the X direction. That is, in the third modification, the heat dissipation material accommodation recess 130 is provided between the first protrusion 141 and the capacitor 65 in the X direction.
  • the heat dissipation material accommodation recess 130 is provided between the first protrusion 141 and the heat sink 80 in the Z direction. Also in the third modification, the heat dissipating material 90 is disposed so as to be surrounded by the first recess 131 and the first protrusion 141, so that the heat dissipating material 90 is prevented from entering the motor main body by the labyrinth structure. Can.
  • the lid 40 has a second recess 132 that is recessed on the upper side (the other side in the first direction) on the inner lower end face (the surface facing the one side in the first direction) 46a.
  • the second recess 132 constitutes at least a part of the heat dissipation material accommodation recess 130, and in the fourth modification, constitutes a portion above the heat dissipation material accommodation recess 130 and parallel to the X direction.
  • the heat sink 80 may have a second protrusion 142 that protrudes upward (the other side in the first direction) on the surface 80 b facing the upper side (the other side in the first direction).
  • the second protrusion 142 is fitted in the second recess 132.
  • the heat sink containing recess 130 is formed between the heat sink 80 and the lid 40 of the second protrusion 142 on the side of the capacitor 65. That is, the heat dissipation material 90 is disposed so as to be surrounded by the second recess 132 and the second protrusion 142.
  • the heat dissipation material 90 is disposed so as to be surrounded by the circuit board 60, the second recess 132, and the second protrusion 142, the heat dissipation material 90 can be prevented from entering the motor main body by the labyrinth structure.
  • the heat sink 80 may extend from the end 65s on the lower side (that is, the circuit board 60 side) of the capacitor 65 in the Z direction to the upper end 65t in the Z direction. Since the end 65s to the end 65t of the capacitor 65 are surrounded by the heat sink 80, the capacitor 65 can be stabilized at a predetermined position (within the capacitor receiving hole 81 of the heat sink 80).
  • the heat dissipating material 90 opposes at least a part of a region of the side surface 65 a of the capacitor 65 from the central portion 120 to the end 65 s on the lower side in the Z direction or the end 65 t on the upper side.
  • the heat dissipation material 90 faces the central portion 12 of the side surface 65 a of the capacitor 65.
  • the heat sink 80 dissipates heat toward the XY direction (second direction) orthogonal to the side surface 65 a of the capacitor 65 on the side surface 80 c opposite to the central portion 120 of the capacitor 65
  • a material accommodation recess 130 is provided.
  • the heat dissipating material 90 is disposed in the heat dissipating material accommodation recess 130 and faces the central portion 120. By disposing the heat dissipating material 90 in the heat dissipating material accommodation recess 130, the heat dissipating material 90 can be easily held at a predetermined position, and the arrangement of the heat dissipating material 90 can be stabilized.
  • the lid 40 is disposed on the upper side (the other side in the first direction) of the capacitor 65 in the Z direction, and faces the top surface (the end face on the other side of the first direction) 65 b of the capacitor 65 and the upper side in the Z direction of the heat sink 80 It faces the surface 80b. That is, the motor main body 2 includes the lid 40 facing both the top surface 65 b of the capacitor 65 and the surface 80 b of the heat sink 80.
  • the lid 40 is disposed on the upper side (the other side in the first direction) of the capacitor 65. Therefore, the capacitor 65 can be confined in the capacitor housing hole 81 and leakage of the heat dissipation material 90 can be suppressed.
  • the heat sink 80 may have a third recess 133 recessed in the XY direction (second direction) on the side surface 80c opposite to the central portion 120 of the side surface 65a of the capacitor 65.
  • the third recess 133 extends from the central portion 120 of the capacitor 65 to the lower side in the Z direction (one side in the first direction).
  • the heat dissipation material 90 is disposed in the third recess 133.
  • the heat sink 80 may have a fourth recess 134 recessed in the XY direction (second direction) on the side surface 80 c opposite to the central portion 120 of the side surface 65 a of the capacitor 65.
  • the fourth recess 134 extends from the central portion 120 of the capacitor 65 to the upper side in the Z direction (the other side in the first direction).
  • the heat dissipation material 90 is disposed in the fourth recess 134.
  • the heat sink 80 is disposed below the circuit board 60.
  • the housing 50 that accommodates the motor body 2 may have the function of the heat sink 80.
  • the bearing holder 30 attached to the opening 51 a of the housing 50 may have the function of a heat sink. That is, in the lower side of the XI region in FIG. 2, the housing 50 is provided with the capacitor housing recess 150.
  • the capacitor 65 extends from the circuit board 60 to the lower side (the other side in the first direction) in the Z direction.
  • the heat sink 80 may include a capacitor housing recess 150 that opens to the upper side (one side in the first direction) in the Z direction.
  • the capacitor 65 is disposed in the capacitor housing recess 150.
  • the heat dissipating material 90 opposes at least a part of the inner wall surface of the capacitor housing recess 150 and the region of the side surface 65 a of the capacitor 65 up to the end 65 s or the lower end 65 t above the central portion 120.
  • the heat dissipation material 90 faces the central portion 12 of the side surface 65 a of the capacitor 65.
  • the heat sink 80 is recessed in the heat sink 80 toward the XY direction (second direction) orthogonal to the side surface 65 a of the capacitor 65 on the side surface 150 c of the capacitor accommodation recess 150 opposed to the central portion 120 of the capacitor 65. It has a recess 130.
  • the heat dissipating material 90 is disposed in the heat dissipating material accommodation recess 130 and faces the central portion 120. By disposing the heat dissipating material 90 in the heat dissipating material accommodation recess 130, the heat dissipating material 90 can be easily held at a predetermined position, and the arrangement of the heat dissipating material 90 can be stabilized.
  • the heat sink 80 includes a capacitor housing recess 150 as in the eighth modification.
  • Capacitor 65 is arranged in capacitor housing recess 150.
  • the heat sink 80 has the third recess 133 recessed in the XY direction (second direction) on the side surface 150 c of the capacitor housing recess 150 facing the central portion 120 of the side surface 65 a of the capacitor 65. Good.
  • the third recess 133 extends from the central portion 120 of the capacitor 65 to the upper side in the Z direction (one side in the first direction).
  • the heat dissipation material 90 is disposed in the third recess 133.
  • the heat dissipating material 90 is disposed in the third recess 133, more heat dissipating materials 90 are disposed in the third recess 133 than in the configuration of the eighth modification, so the heat dissipating efficiency is improved and the heat dissipating material 90 is increased. Can be well prevented.
  • the heat sink 80 includes a capacitor housing recess 150 as in the eighth modification.
  • Capacitor 65 is arranged in capacitor housing recess 150.
  • the heat sink 80 has a fourth recess 134 recessed in the XY direction (second direction) on the side surface 150 c of the capacitor housing recess 150 facing the central portion 120 of the side surface 65 a of the capacitor 65.
  • the fourth recess 134 extends from the central portion 120 of the capacitor 65 to the lower side in the Z direction (the other side in the first direction).
  • the heat dissipation material 90 is disposed in the fourth recess 134.
  • the heat dissipating material 90 is disposed in the fourth recess 134, the heat dissipating material 90 is disposed more in the fourth recess 134 than in the configuration of the eighth modification, so that the heat dissipating efficiency is enhanced. Can be well prevented.
  • the heat sink 80 extends from the lower end 65 s of the capacitor 65 in the Z direction to the upper end 65 t and includes a capacitor receiving hole 81.
  • the capacitor 65 is disposed in the capacitor receiving hole 81.
  • the motor main body 2 includes a lid 40 facing both the top surface 65 b of the capacitor 65 and the surface 80 b of the heat sink 80.
  • the motor 1 has a sealing member 94 that seals between the capacitor 65 and the heat sink 80 on the upper side (the other side in the first direction) than the central portion 120.
  • the heat dissipating material 90 contacts the capacitor 65, the heat sink 80, the circuit board 60, and the sealing member 94.
  • the heat dissipating material 90 is disposed in the space surrounded by the capacitor 65, the heat sink 80, the circuit board 60, and the sealing member 94, the heat dissipating efficiency can be enhanced.
  • the sealing member 94 can isolate the electric field or the like and the heat dissipation material 90.
  • the heat sink 80 includes a capacitor housing recess 150.
  • Capacitor 65 is arranged in capacitor housing recess 150.
  • the motor body 2 does not include the lid 40.
  • the motor 1 has a sealing member 94 that seals between the capacitor 65 and the heat sink 80 on the upper side (the other side in the first direction) than the central portion 120 of the capacitor.
  • the heat dissipating material 90 contacts the capacitor 65, the heat sink 80, the circuit board 60, and the sealing member 94.
  • the heat dissipating material 90 is disposed in the space surrounded by the capacitor 65, the heat sink 80, the circuit board 60, and the sealing member 94, the heat dissipating efficiency can be enhanced as in the eleventh modification.
  • the sealing member 94 can isolate the electric field or the like and the heat dissipation material 90.
  • the heat sink 80 extends from the lower end 65 s of the capacitor 65 in the Z direction to the upper end 65 t and has a capacitor accommodation hole 81.
  • the capacitor 65 is disposed in the capacitor accommodation hole 81.
  • the motor body 2 includes a lid 40 facing both the top surface 65 b and the top surface 65 b of the capacitor 65 and the surface 80 b of the heat sink 80.
  • a sealing member 94 that seals between the capacitor 65 and the heat sink 80 is provided below the central portion 120 of the capacitor (one side in the first direction).
  • the heat dissipating material 90 contacts the capacitor 65, the heat sink 80, the lid 40, and the sealing member 94.
  • the heat dissipating material is disposed in the space surrounded by the capacitor 65, the heat sink 80, the lid 40, and the sealing member 94, the heat dissipating effect can be enhanced and the heat dissipating material 90 can be favorably prevented from leaking.
  • the heat sink 80 includes a capacitor housing recess 150.
  • Capacitor 65 is arranged in capacitor housing recess 150.
  • the motor 1 has a sealing member 94 that seals between the capacitor 65 and the heat sink 80 below the central portion 120.
  • the heat dissipating material 90 contacts the capacitor 65, the heat sink 80, and the sealing member 94.
  • the heat dissipating material 90 is disposed in the space surrounded by the capacitor 65, the heat sink 80, and the sealing member 94, so that the heat dissipating efficiency can be enhanced and the heat dissipating material 90 can be favorably prevented from leaking.
  • the heat sink 80 extends from the lower end 65 s of the capacitor 65 in the Z direction to the upper end 65 t and has a capacitor accommodation hole 81.
  • the capacitor 65 is disposed in the capacitor accommodation hole 81.
  • the motor main body 2 includes a lid 40 facing both the top surface 65 b of the capacitor 65 and the surface 80 b of the heat sink 80.
  • the lid portion 40 protrudes toward the lower side in the Z direction (surface) 46 a toward the lower side (one side in the first direction) in the Z direction, and a third protrusion facing the side surface 65 a of the capacitor 65 It has a portion 143.
  • the third protrusion 143 is disposed between the capacitor 65 and the heat sink 80.
  • the heat dissipating material 90 contacts the capacitor 65, the heat sink 80, the third protrusion 143, and the circuit board 60.
  • the heat dissipating material 90 is disposed in the space surrounded by the capacitor 65, the heat sink 80, the third protrusion 143, and the circuit board 60 to enhance the heat dissipation efficiency, and the third protrusion 143 removes the heat dissipating material 90. Can be well prevented.
  • the connector 70 is provided to connect the circuit board 60 to an external device. As shown in FIG. 2, the connector 70 includes a pair of conductive connector bodies 70 ⁇ / b> A and an insulating support portion 71. The pair of connector bodies 70A are arranged along one direction (one direction in the horizontal plane, in the present embodiment, the X-axis direction) orthogonal to the axial direction.
  • the support portion 71 is located below the circuit board 60.
  • the support portion 71 supports the connector main body 70A.
  • the support 71 is fixed to a bearing holder 30 which is a part of the housing 4. That is, the support 71 is fixed to the housing 4.
  • the support portion 71 is insulating.
  • that the support part 71 is insulating means that the support part 71 insulates the connector main body 70A and the bearing holder 30.
  • the support portion 71 may have an insulating member interposed between the connector main body 70A and the bearing holder 30.
  • a resin material is used as the insulating member.
  • the support portion 71 includes a support portion main body 71 a and a pair of fixing portions 71 b. A part of the connector main body 70A is embedded in the support main body 71a by insert molding. Therefore, the support portion 71 supports the connector main body 70A in the support portion main body 71a.
  • the support portion main body 71a has a rectangular shape whose longitudinal direction is the direction in which the pair of connector main bodies 70A are arranged (X-axis direction).
  • the pair of fixing portions 71b are located at both ends in the longitudinal direction of the support portion main body 71a.
  • the pair of fixing portions 71b respectively extend on both sides in the longitudinal direction of the support portion main body 71a.
  • the housing 4 includes a lid 40 that covers the upper side of the circuit board 60, and a bearing holder 30 as a base located below the circuit board 60.
  • the base located below the circuit board 60 may be part of the housing 50. That is, the base may be at least one of the housing 50 and the bearing holder 30.
  • the circuit board 60 is located on one side in the axial direction with respect to the motor body 2. Also, the circuit board 60 extends in a direction orthogonal to the central axis J. However, the position of the circuit board 60 with respect to the motor body 2 is not limited to this. As an example, the circuit board may be disposed along the central axis J on the side surface of the motor body.
  • the length in the Z direction (first direction) of the capacitor accommodation hole 81 and the capacitor accommodation recess 150 is substantially the same as the length in the Z direction of the capacitor 65. However, the length in the Z direction of capacitor housing hole 81 and capacitor housing recess 150 may be longer than the length in the Z direction of capacitor 65. At this time, since the heat-radiating material accommodation concave portion 130 faces the central portion 120 of the capacitor 65, the heat-radiating material accommodation concave portion 130 is positioned below the capacitor accommodation hole 81.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Cooling System (AREA)
  • Permanent Magnet Type Synchronous Machine (AREA)

Abstract

La présente invention concerne un moteur qui comprend : un corps principal de moteur ayant un rotor et un stator ; et un condensateur en colonne, qui est électriquement connecté au corps principal de moteur, et qui s'étend dans une première direction. Le corps principal de moteur comporte : un dissipateur thermique faisant face à la surface latérale du condensateur ; et un matériau de dissipation de chaleur en contact avec le dissipateur thermique et une partie de la surface latérale du condensateur. La surface latérale du condensateur a une première région en contact avec le matériau de dissipation de chaleur, et la première région est une partie de la surface latérale du condensateur, et comprend une partie centrale de la surface latérale du condensateur, ladite partie centrale étant dans la première direction.
PCT/JP2018/025400 2017-09-29 2018-07-04 Moteur WO2019064793A1 (fr)

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JP2017192190A JP7002904B2 (ja) 2017-09-29 2017-09-29 モータ
JP2017-192190 2017-09-29

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WO2019064793A1 true WO2019064793A1 (fr) 2019-04-04

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CN (1) CN111033976B (fr)
WO (1) WO2019064793A1 (fr)

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WO2021065452A1 (fr) * 2019-09-30 2021-04-08 日本電産株式会社 Unité de moteur
CN114503399A (zh) * 2019-09-30 2022-05-13 日本电产株式会社 马达单元
WO2022230007A1 (fr) * 2021-04-26 2022-11-03 三菱電機株式会社 Machine électrique tournante
EP4333269A4 (fr) * 2021-04-26 2024-06-19 Mitsubishi Electric Corporation Machine tournante électrique

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JP2021035165A (ja) * 2019-08-23 2021-03-01 日本電産トーソク株式会社 電動アクチュエータ
JP7435151B2 (ja) 2020-03-27 2024-02-21 ニデックパワートレインシステムズ株式会社 制御装置

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CN114450873A (zh) * 2019-09-30 2022-05-06 日本电产株式会社 马达单元
CN114503399A (zh) * 2019-09-30 2022-05-13 日本电产株式会社 马达单元
CN114450873B (zh) * 2019-09-30 2024-06-04 日本电产株式会社 马达单元
CN114503399B (zh) * 2019-09-30 2024-06-04 日本电产株式会社 马达单元
WO2022230007A1 (fr) * 2021-04-26 2022-11-03 三菱電機株式会社 Machine électrique tournante
EP4333269A4 (fr) * 2021-04-26 2024-06-19 Mitsubishi Electric Corporation Machine tournante électrique

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CN111033976B (zh) 2022-04-08
JP7002904B2 (ja) 2022-01-20
JP2019068628A (ja) 2019-04-25
CN111033976A (zh) 2020-04-17

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