WO2024143511A1 - Dispositif d'entraînement - Google Patents

Dispositif d'entraînement Download PDF

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Publication number
WO2024143511A1
WO2024143511A1 PCT/JP2023/047115 JP2023047115W WO2024143511A1 WO 2024143511 A1 WO2024143511 A1 WO 2024143511A1 JP 2023047115 W JP2023047115 W JP 2023047115W WO 2024143511 A1 WO2024143511 A1 WO 2024143511A1
Authority
WO
WIPO (PCT)
Prior art keywords
housing
motor
fastening portions
axial
stator core
Prior art date
Application number
PCT/JP2023/047115
Other languages
English (en)
Japanese (ja)
Inventor
成勝 松田
大介 小笠原
浩毅 赤石
Original Assignee
ニデック株式会社
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 ニデック株式会社 filed Critical ニデック株式会社
Publication of WO2024143511A1 publication Critical patent/WO2024143511A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02K—DYNAMO-ELECTRIC MACHINES
    • H02K5/00—Casings; Enclosures; Supports
    • H02K5/24—Casings; Enclosures; Supports specially adapted for suppression or reduction of noise or vibrations

Definitions

  • one of the objectives of the present invention is to provide a drive device that can suppress the transmission of vibrations to a control device.
  • the first direction Z is at least a direction perpendicular to the axial direction Y.
  • the second direction X is a direction perpendicular to the axial direction Y and intersects with the first direction Z. Note that in the embodiment described below, the second direction X is perpendicular to both the axial direction Y and the first direction Z.
  • Fig. 1 is a conceptual diagram of a drive device 1 according to the present embodiment.
  • Fig. 2 is a perspective view of the drive device 1 according to the present embodiment.
  • Fig. 3 is an exploded perspective view of the drive device 1 according to the present embodiment.
  • the drive device 1 of this embodiment is mounted on a vehicle that uses a motor as a power source, such as a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHV), or an electric vehicle (EV), and is used as the power source thereof.
  • a motor such as a hybrid electric vehicle (HEV), a plug-in hybrid electric vehicle (PHV), or an electric vehicle (EV)
  • the drive device 1 includes a motor 2, a transmission mechanism 4, a first control unit 7, a second control unit 8, a housing 6, and a case 70.
  • the motor 2, the transmission mechanism 4, and the second control unit 8 are arranged on the first axis J1.
  • the first control unit 7 is located radially outside the motor 2, the transmission mechanism 4, and the second control unit 8.
  • the motor 2, the transmission mechanism 4, and the second control unit 8 are housed in the housing 6.
  • the first control unit 7 is housed in the case 70.
  • the motor 2 has a rotor 20 and a stator 30.
  • the motor 2 is an inner rotor type motor in which the rotor 20 is disposed inside the stator 30.
  • the rotor 20 can rotate around a first axis J1 that extends horizontally.
  • the rotor 20 has a shaft 21, a rotor core 24 fixed to the outer circumferential surface of the shaft 21, and a rotor magnet (not shown) fixed to the rotor core.
  • the torque of the rotor 20 is transmitted to the transmission mechanism 4.
  • the shaft 21 extends along the first axis J1.
  • the shaft 21 is rotatably supported by a pair of bearings 5A, 5B.
  • the stator 30 is held in the housing 6.
  • the stator 30 is located radially outside the rotor 20 and surrounds the rotor 20 from the radial outside.
  • the stator 30 has an annular stator core 32 centered on the first axis J1, and a coil 31 attached to the stator core 32 via an insulator (not shown).
  • the coil 31 has coil ends 31a that protrude in the axial direction from the end faces on one axial side (+Y) and the other axial side (-Y) of the stator core 32.
  • the first control unit 7 controls the motor 2.
  • the first control unit 7 in this embodiment is located above the second control unit 8, the motor 2, and the transmission mechanism 4. Therefore, the first control unit 7 is located radially outside the second control unit 8, the motor 2, and the transmission mechanism 4.
  • the first control unit 7 in this embodiment is connected to a battery (not shown) mounted on the vehicle, a vehicle integrated control system of the vehicle, and the like.
  • the power conversion unit 72 has a voltage adjustment function.
  • the power conversion unit 72 has, for example, an on-board charger (OBC; On Board Charger) 72a and a DC/DC converter 72b.
  • OBC On Board Charger
  • the on-board charger 72a is a system for converting AC voltage supplied via a plug into DC voltage and charging the battery.
  • the DC/DC converter 72b is a part that converts the voltage supplied from the battery and charges another low-voltage battery. Note that the power conversion unit 72 does not have to have at least one of the DC/DC converter 72b and the on-board charger 72a. Note that the DC/DC converter 72b may boost the voltage supplied from the battery and supply it to other electronic components, etc.
  • the second control unit 8 controls the motor 2 together with the first control unit 7.
  • the second control unit 8 is connected to the motor 2 and the first control unit 7 via a bus bar (not shown).
  • the second control unit 8 converts the direct current supplied from the first control unit 7 into alternating current and supplies it to the motor 2.
  • the second control unit 8 functions as an inverter.
  • the cylindrical portion 61a surrounds the motor 2 and the power module 83 from the radial outside. That is, the housing 6 surrounds the motor 2 at the cylindrical portion 61a.
  • the outer peripheral surface of the stator core 32 contacts the inner peripheral surface of the cylindrical portion 61a.
  • a bearing holder 64 is fixed to the inner peripheral surface of the cylindrical portion 61a. The bearing holder 64 holds the bearing 5A.
  • the transmission mechanism accommodating section 6B accommodates the transmission mechanism 4.
  • the transmission mechanism accommodating section 6B has a cover section 61b of the housing body 61 and a lid member 62 that covers the opening of the cover section 61b.
  • Oil O is stored inside the transmission mechanism accommodating section 6B.
  • the oil O increases the lubricity of the transmission mechanism 4 inside the transmission mechanism accommodating section 6B.
  • the electronic component storage section 6C stores multiple electronic components 82, 83 of the second control section 8.
  • the electronic component storage section 6C has an end portion on the other axial side (-Y) of the cylindrical portion 61a of the housing main body 61 and an electronic component support member 63.
  • the housing 6 is provided with seven first fixing parts 66. Of the seven first fixing parts 66, three are provided in the transmission mechanism housing part 6B and four are provided in the electronic component housing part 6C. A case 70 is fixed to the first fixing parts 66.
  • the case 70 is fixed by screwing the multiple second fixing parts 75c to the first fixing parts 66 with fixing screws 9. That is, in this embodiment, the first control unit 7 is fixed to the second control unit 8 from above. Also, in this embodiment, the case 70 is fastened to the housing 6 by the fixing screws 9 extending in the first direction Z. Therefore, the fastening direction of the case 70 in this embodiment to the housing 6 is the first direction Z.
  • first fastening portion 91 when distinguishing between the seven fastening portions 90, they will be referred to as the first fastening portion 91, the second fastening portion 92, the third fastening portion 93, the fourth fastening portion 94, the fifth fastening portion 95, the sixth fastening portion 96, and the seventh fastening portion 97, respectively.
  • the sixth fastening portion 96 and the seventh fastening portion 97 are end portions on the other axial side (-Y) of the electronic component support member 63, and protrude from the surface of the outer surface of the electronic component support member 63 facing the other axial side (-Y) in the second direction toward the other side (-Y).
  • the sixth fastening portion 96 and the seventh fastening portion 97 are arranged in this order toward one side (+X) in the second direction.
  • the one-side fastening parts 91, 92, 93 can be moved axially away from the transmission mechanism 4 by moving the one-side fastening parts 91, 92, 93 closer to the stator core 32 in the axial direction.
  • This allows the one-side fastening parts 91, 92, 93 to be positioned axially away from the meshing parts of the gears, which are the source of gear noise, and reduces the gear noise transmitted to the case 70 via the one-side fastening parts 91, 92, 93.
  • the multiple one-side fastening portions 91, 92, 93 are located radially outside the coil end 31a located on one axial side of the stator core 32. That is, the multiple one-side fastening portions 91, 92, 93 at least partially overlap the coil end 31a when viewed from the radial direction.
  • the one-side fastening portions 91, 92, 93 By arranging the one-side fastening portions 91, 92, 93 in this manner, they can be positioned axially away from the source of gear noise in the transmission mechanism 4, and the gear noise transmitted to the case 70 via the one-side fastening portions 91, 92, 93 can be reduced.
  • FIG. 5 is a schematic diagram of the housing 6 showing the main longitudinal resonance mode assumed for the housing 6 of this embodiment.
  • FIG. 6 is a schematic diagram of the housing 6 showing the main vertical resonance mode assumed for the housing 6 of this embodiment.
  • the main longitudinal resonance mode shown in FIG. 5 is a resonance mode that deforms the ends of the housing 6 on one axial side (+Y) and the other axial side (-Y) in the longitudinal direction of the vehicle (i.e., the second direction X).
  • the main left-right resonance mode shown in FIG. 6 is a resonance mode that deforms the ends of the housing 6 on one axial side (+Y) and the other axial side (-Y) in the vertical direction of the vehicle (i.e., the first direction Z).
  • the fifth fastening portion 195 of this modified example is located on the other axial side (-Y) compared to the above-described embodiment.
  • the fifth fastening portion 195 of this modified example protrudes to one side in the second direction (+X) from the surface of the outer surface of the electronic component support member 63 that faces one side in the second direction (+X).
  • the housing 6 is provided with the transmission mechanism accommodating portion 6B, so that the region on one axial side (+Y) of the stator core 32 has higher rigidity than the region on the other axial side (-Y). That is, the region on the other axial side (-Y) of the stator core 32 in the housing 6 has lower rigidity than the region on one axial side (+Y) of the stator core 32, and vibrations are more likely to be transmitted.
  • one (the fifth fastening portion 195) of the two fastening portions (the fourth fastening portion 94 and the fifth fastening portion 195) that are located closest to the stator core 32 among the multiple other side fastening portions 94, 195, 96, 97 is axially separated from the stator core 32. This makes it difficult for vibrations of the stator core 32 to be transmitted to the fifth fastening portion 195. According to this modified example, it is possible to suppress the transmission of vibrations of the stator core 32 to the case 70 via the fifth fastening portion 195.
  • the fourth fastening portion 94 which is one of the multiple other-side fastening portions 94, 195, 96, and 97 located furthest to the other side (-X) in the second direction, is provided on the housing main body 61, and the other other-side fastening portions (the fifth fastening portion 195, the sixth fastening portion 96, and the seventh fastening portion 97) are provided on the electronic component support member 63.
  • the housing main body 61 surrounds the motor 2 from the radial outside, so that the vibration of the stator core 32 is directly transmitted. In addition, the vibration of the stator core 32 is attenuated at the boundary between the housing main body 61 and the electronic component support member 63.
  • the fourth fastening portion 294 of this modified example is located on the other axial side (-Y) compared to the above-described embodiment.
  • the fourth fastening portion 294 of this modified example protrudes toward the other side in the second direction (-X) from the outer surface of the electronic component support member 63 that faces the other side in the second direction (-X). Therefore, in the drive device 201 of this modified example, the fourth fastening portion 294 and the fifth fastening portion 195 are provided on both sides of the electronic component support member 63 in the second direction X.
  • the multiple other-side fastening portions 294, 195, 96, 97 include two or more other-side fastening portions 294, 195 located on the same second imaginary plane VP2 perpendicular to the first axis J1, and two or more other-side fastening portions 96, 97 located on the same third imaginary plane VP3 perpendicular to the first axis J1.
  • the fourth fastening portion 294 and the fifth fastening portion 195 are located on the second imaginary plane VP2.
  • the sixth fastening portion 96 and the seventh fastening portion 97 are located on the third imaginary plane VP3.
  • the multiple other-side fastening portions 294, 195, 96, and 97 are arranged in a straight line aligned in the second direction X when viewed from the first direction Z, thereby suppressing the main longitudinal resonance mode of the housing 6 (see FIG. 5).
  • the drive device 201 of this modified example has two sets of two or more other-side fastening parts 294, 195, 96, 97 located on the same imaginary planes VP2 and VP3. Therefore, the drive device 201 of this modified example has an improved effect of suppressing the main front-rear resonance mode of the housing 6 (see FIG. 5).
  • (Variation 3) 9 is a plan view of a driving device 301 of Modification 3.
  • the driving device 301 of this modification is mainly different from Modifications 1 and 2 in that it does not have the fourth fastening portion and the fifth fastening portion.
  • the driving device 301 of this modification has five fastening portions 390.
  • the five fastening portions 390 in this modified example include three one-side fastening portions 191, 192, 193 located on one axial side (+Y) of the stator core 32, and two other-side fastening portions 96, 97 located on the other axial side (-Y) of the stator core 32.
  • the number of fastening parts 191, 192, 193 on one side is greater than the number of fastening parts 96, 97 on the other side.
  • the housing 6 is provided with the transmission mechanism accommodating part 6B, so that the rigidity of the region on one axial side (+Y) of the stator core 32 is higher than that of the region on the other axial side (-Y).
  • the number of fastening parts 390 arranged in the region with relatively high rigidity is increased compared to the number of fastening parts 390 arranged in the region with relatively low rigidity, so that the support of the case 70 by the fastening parts 390 can be stabilized.
  • the vibration of the stator core 32 is less likely to be transmitted to the fastening parts 390. Therefore, according to this modified example, the vibration transmitted to the case 70 via the fastening parts 390 can be reduced.
  • the drive device 301 of this modified example is provided with five fastening parts 390.
  • the fastening parts 390 serve as paths for transmitting vibrations from the housing 6 to the case 70. For this reason, by reducing the number of fastening parts 390, it becomes easier to reduce the vibrations transmitted from the housing 6 to the case 70.
  • the number of fastening parts 390 is five or less, it is possible to make it difficult for vibrations to be transmitted from the housing 6 to the case 70.
  • the drive device 301 has three to five fastening parts 390.
  • (Variation 4) 10 is a plan view of a driving device 401 of modified example 4.
  • the driving device 401 of this modified example has a configuration that combines the above-mentioned embodiment and modified examples. That is, the driving device 401 of this modified example has a first fastening portion 91, a second fastening portion 92, a third fastening portion 93, a sixth fastening portion 96, and a seventh fastening portion 97 similar to the embodiment, a fourth fastening portion 294 similar to modified example 2, and a fifth fastening portion 195 similar to modified example 1. According to the driving device 401 of this modified example, the effects of the above-mentioned embodiment and modified examples can be obtained at the same time.
  • stator core is in direct contact with the cylindrical portion of the first housing.
  • other members such as a water jacket may be disposed between the stator core and the cylindrical portion of the first housing.
  • a drive device as described in (2) or (3) further comprising a transmission mechanism accommodated in the housing on one axial side of the motor and transmitting the power of the rotor, the housing comprising a housing main body having a cylindrical portion surrounding the motor from the outside in the radial direction and a cover portion covering the transmission mechanism from the other axial side, and a lid member fixed to the cover portion at a fixing surface perpendicular to the first axis, the center of each of the multiple one-side fastening portions being located on the stator core side of a midpoint between an end face on one axial side of the stator core and the fixing surface.
  • the plurality of other-side fastening portions include two or more other-side fastening portions positioned on the same imaginary plane perpendicular to the first axis.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Motor Or Generator Frames (AREA)
  • Iron Core Of Rotating Electric Machines (AREA)

Abstract

Un aspect d'un dispositif d'entraînement selon la présente invention comprend : un moteur ayant un rotor qui peut tourner autour d'un premier axe et un stator qui entoure le rotor par le côté radialement extérieur ; un carter qui entoure le moteur ; une première unité de commande qui pilote le moteur ; et un boîtier qui loge la première unité de commande. Le stator comprend un noyau de stator annulaire qui est centré sur le premier axe et une bobine qui est installée sur le noyau de stator. Le boîtier est fixé au carter à partir d'une première direction qui est orthogonale à la direction axiale, au niveau d'une pluralité de parties de fixation. La pluralité de parties de fixation sont disposées à des positions qui sont décalées par rapport au noyau de stator dans la direction axiale.
PCT/JP2023/047115 2022-12-27 2023-12-27 Dispositif d'entraînement WO2024143511A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202263435395P 2022-12-27 2022-12-27
US63/435,395 2022-12-27

Publications (1)

Publication Number Publication Date
WO2024143511A1 true WO2024143511A1 (fr) 2024-07-04

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PCT/JP2023/047115 WO2024143511A1 (fr) 2022-12-27 2023-12-27 Dispositif d'entraînement

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012120588A1 (fr) * 2011-03-04 2012-09-13 三菱電機株式会社 Dispositif d'activation de moteur
JP2018050439A (ja) * 2016-09-23 2018-03-29 株式会社ジェイテクト モータおよび電動パワーステアリング装置
JP2021158860A (ja) * 2020-03-27 2021-10-07 日産自動車株式会社 回転電機装置

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2012120588A1 (fr) * 2011-03-04 2012-09-13 三菱電機株式会社 Dispositif d'activation de moteur
JP2018050439A (ja) * 2016-09-23 2018-03-29 株式会社ジェイテクト モータおよび電動パワーステアリング装置
JP2021158860A (ja) * 2020-03-27 2021-10-07 日産自動車株式会社 回転電機装置

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