Title:
MOTOR FOR ELECTRIC POWER STEERING SYSTEM
Document Type and Number:
WIPO Patent Application WO/2007/029563
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 loading
ratio (2PΦ/(ZI/a)) of its magnetic loading (2PΦ) to electric loading
(ZI/a) is set in the range of 100-300. Consequently, a motor for EPS in which physical
constitution, output, steering feeling, cost, and the like, are satisfied in
good balance can be obtained. Since a numeric value conforming to EPS specification
is set for the loading ratio, specification at each part of the motor can be determined
in accordance with that value, resulting in optimization of design or reduction
in manhour of design.
Inventors:
IKENO HIROTATSU (JP)
Application Number:
PCT/JP2006/316968
Publication Date:
March 15, 2007
Filing Date:
August 29, 2006
Export Citation:
Assignee:
MITSUBA CORP (JP)
IKENO HIROTATSU (JP)
IKENO HIROTATSU (JP)
International Classes:
H02K21/14; B62D5/04; H02K1/16; H02K33/18
Foreign References:
| JP2004180449A | 2004-06-24 | |||
| JPH0662555A | 1994-03-04 | |||
| JPH09271157A | 1997-10-14 | |||
| JPH03243155A | 1991-10-30 | |||
| JP2005051950A | 2005-02-24 | |||
| JP2005020887A | 2005-01-20 | |||
| JP2003274615A | 2003-09-26 |
Attorney, Agent or Firm:
TAKANO, Yasushi (Miyamasuzaka-Toho-Estate 602 1-12-12, Shibuy, Shibuya-ku Tokyo 02, JP)
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