Title:
CONTROLLER FOR ELECTRIC POWER-STEERING APPARATUS
Document Type and Number:
WIPO Patent Application WO/2005/043089
Kind Code:
A1
Abstract:
Conventionally, the processing time is long and the load on the CPU is heavy because abnormality judgment is carried out by subjecting sin Ѳ and cos Ѳ to squaring operation so as to detect abnormality of the resolver. According to the invention, a map for judging whether the combination of sin Ѳ and cos Ѳ is normal or abnormal is prepared, the detected combination of sin Ѳ and cos Ѳ is mapped to make a judgment. Therefore, the processing is simple, the processing speed is fast, and consequently the load on the CPU is light. If the motor is controlled using rectangular waveform current by detecting the rotational angle signals from Hall sensors disposed round the motor, the assist can be continued.
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Inventors:
OTSUKA TETSURO (JP)
HORIKOSHI ATSUSHI (JP)
AOKI YUHO (JP)
HORIKOSHI ATSUSHI (JP)
AOKI YUHO (JP)
Application Number:
PCT/JP2004/016502
Publication Date:
May 12, 2005
Filing Date:
November 01, 2004
Export Citation:
Assignee:
NSK LTD (JP)
NSK STEERING SYS CO LTD (JP)
OTSUKA TETSURO (JP)
HORIKOSHI ATSUSHI (JP)
AOKI YUHO (JP)
NSK STEERING SYS CO LTD (JP)
OTSUKA TETSURO (JP)
HORIKOSHI ATSUSHI (JP)
AOKI YUHO (JP)
International Classes:
B62D5/04; G01D5/244; G01D5/245; (IPC1-7): G01D5/245
Foreign References:
| JP2003166803A | 2003-06-13 | |||
| JP2002005690A | 2002-01-09 | |||
| JPH04191615A | 1992-07-09 | |||
| JPH05322598A | 1993-12-07 | |||
| JPH0972758A | 1997-03-18 | |||
| JPS63135016U | 1988-09-05 |
Attorney, Agent or Firm:
Agata, Yuzo (Akasaka 2-Chome, Minato-Ku Tokyo 52, JP)
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