Title:
ELECTRIC DRIVE DEVICE AND ELECTRIC POWER STEERING DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/042988
Kind Code:
A1
Abstract:
Provided is an electric drive device in which heat-dissipating sections (15A) (15B) that transfer at least heat generated by a power supply circuit unit (17) and power conversion circuit units (16) to a motor housing (11) are formed on an end surface section (15) of the motor housing (11) on the opposite side from an output section of a rotating shaft (23) of an electric motor. In addition, a power conversion circuit unit-fixing member (35) having an elastic functional member (36) is attached to an end surface section around the rotating shaft, and the power conversion circuit units (16) are pressed against the heat-dissipating sections and held by the elastic functional member (36). As a result of this configuration, heat generated by the power supply circuit unit (17) and the power conversion circuit units (16) is transferred to the end surface section (15) of the motor housing (11), and it is thereby possible to omit a heat sink member and shorten the length in the axial direction. Furthermore, as a result of the power conversion circuit units (16) being pressed against the heat-dissipating sections and held by the elastic functional member (36), it is possible to omit a fixing bolt and thereby reduce the size of the power conversion circuit units (16).
Inventors:
KANAZAWA TAKURO (JP)
HAMADA KEIJI (JP)
MOTODA HARUAKI (JP)
HAMADA KEIJI (JP)
MOTODA HARUAKI (JP)
Application Number:
PCT/JP2017/027589
Publication Date:
March 08, 2018
Filing Date:
July 31, 2017
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
H02K11/33; B62D5/04
Domestic Patent References:
| WO2016117144A1 | 2016-07-28 |
Foreign References:
| JP2009189179A | 2009-08-20 | |||
| JP2011067064A | 2011-03-31 | |||
| JP2005176451A | 2005-06-30 |
Attorney, Agent or Firm:
KOBAYASHI, Hiromichi et al. (JP)
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