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Title:
ELECTRIC POWER STEERING DEVICE AND RACK ASSIST-TYPE STEERING DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/142932
Kind Code:
A1
Abstract:
Provided is a novel electric power steering device that can continue a steering assist function to the greatest extent possible, even in an environment in which an electric short-circuit can occur due to the infiltration of moisture into the housing of an electric motor from damage to a rubber boot. A stator 14 around which a winding is wound is vertically divided into two regions relative to the direction of gravity. A winding 16 of one system is wound around an upper side stator region of the stator 14, and the winding 16 of another system is wound around a lower side stator region of the stator 14. Furthermore, the power of the winding of the one system is controlled by an electronic control means 33 of the one system, and the power of the winding of the other system is controlled by an electronic control means 34 of the other system. Even if moisture infiltrates into the housing of the electric motor from damage to the rubber boot, an electric short-circuit is suppressed from occurring for at least the winding wound around the upper side so that the steering assist can be continued.

Inventors:
NAKAYAMA Kenji (2520, Takaba, Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
KANAZAWA Hiroshi (2520, Takaba, Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
Application Number:
JP2018/001140
Publication Date:
August 09, 2018
Filing Date:
January 17, 2018
Export Citation:
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Assignee:
HITACHI AUTOMOTIVE SYSTEMS, LTD. (2520, Takaba Hitachinaka-sh, Ibaraki 03, 〒3128503, JP)
International Classes:
H02K3/18; B62D5/04; H02K5/10; H02K11/30
Foreign References:
JP2005237068A2005-09-02
JPS62230334A1987-10-09
JP2011131612A2011-07-07
Attorney, Agent or Firm:
TODA Yuji (6-1, Marunouchi 1-chome, Chiyoda-k, Tokyo 20, 〒1008220, JP)
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