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Title:
MOTOR FOR ELECTRIC POWER STEERING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2007/029562
Kind Code:
A1
Abstract:
[PROBLEMS] To provide a motor for EPS which can exhibit a desired performance while satisfying severe limitation on physical constitution. [MEANS FOR SOLVING PROBLEMS] In a motor for a rack assist type electric power steering system arranged coaxially around a rack shaft coupled with a steering wheel and supplying a steering assist force to the rack shaft, the motor has a six-pole/nine-slot structure and the ratio between the number of turns and the wire diameter of a winding (number of turns/wire diameter of winding) is set in the range of 15-25. Consequently, a motor for EPS in which physical constitution, output, heat generation, steering feeling, cost, and the like, are satisfied in good balance can be obtained. Since numeric values conforming to EPS specification are set for the ratio of number of turns/wire diameter of winding, specification at each part of the motor can be determined in accordance with these values resulting in optimization of design or reduction in manhour of design.

Inventors:
IKENO HIROTATSU (JP)
Application Number:
PCT/JP2006/316967
Publication Date:
March 15, 2007
Filing Date:
August 29, 2006
Export Citation:
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Assignee:
MITSUBA CORP (JP)
IKENO HIROTATSU (JP)
International Classes:
B62D5/04; H02K3/28; H02K29/12
Foreign References:
JP2004180449A2004-06-24
JPH08280194A1996-10-22
JP2002199683A2002-07-12
JP2005051950A2005-02-24
JP2005020887A2005-01-20
JP2003274615A2003-09-26
Attorney, Agent or Firm:
TAKANO, Yasushi (Miyamasuzaka-Toho-Estate 602 1-12-12, Shibuy, Shibuya-ku Tokyo 02, JP)
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