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1. (WO2017154500) ELECTRIC DRIVE DEVICE AND ELECTRIC POWER STEERING DEVICE

Pub. No.:    WO/2017/154500    International Application No.:    PCT/JP2017/005639
Publication Date: Fri Sep 15 01:59:59 CEST 2017 International Filing Date: Fri Feb 17 00:59:59 CET 2017
IPC: B62D 5/04
B60R 16/02
H02K 9/22
H02K 11/30
Applicants: HITACHI AUTOMOTIVE SYSTEMS, LTD.
日立オートモティブシステムズ株式会社
Inventors: FUJIMOTO, Masao
藤本 政男
HAMADA, Keiji
濱田 啓二
Title: ELECTRIC DRIVE DEVICE AND ELECTRIC POWER STEERING DEVICE
Abstract:
The present invention comprises: a motor housing 20 in which an electric motor is housed; a heat dissipation base 23 that is fixed to an end surface of the motor housing, said end surface being on the opposite side from an output part of a rotational shaft of the electric motor, and extends in the opposite rotational shaft direction as the output part; one electronic control means of a redundant system, said one electronic control means comprising substrates 24, 25 that are positioned along the direction in which the heat dissipation base extends and are fixed, in a manner allowing heat conduction, to the heat dissipation base; and another electronic control means of the redundant system, said other electronic control means comprising substrates 26, 27 that are positioned along the direction in which the heat dissipation base extends and are fixed, in a manner allowing heat conduction, to the heat dissipation base, wherein the substrates of the one electronic control means and the substrates of the other electronic control means are attached to the heat dissipation base at a slant with regard to the direction in which the heat dissipation base extends, and heat is dissipated from the motor housing via the heat dissipation base.