Title:
CURRENT-CARRYING CONTROL DEVICE AND ELECTRIC POWER STEERING SYSTEM
Document Type and Number:
Japanese Patent JP3584832
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To positively and securely avoid the overheat of a relay with the compact structure in an electric power steering system for controlling the switching condition of an assist motor and current-carrying lines of a driving circuit with a relay such as an electromagnetic relay.
SOLUTION: Temperature of electromagnetic relays 18a, 18b is estimated one by one on the basis of a detected temperature by a temperature sensor 18c with the control by a control circuit 13. In the case where this estimated temperature value exceeds the set value, current modifying control is performed so as to reduce the upper limit of the target current value of a motor 11 step by step.
Inventors:
Tetsuya Fukumoto
Keisuke Sawano
Yoshiaki Higashihara
Keisuke Sawano
Yoshiaki Higashihara
Application Number:
JP2000015181A
Publication Date:
November 04, 2004
Filing Date:
January 25, 2000
Export Citation:
Assignee:
OMRON Corporation
International Classes:
B62D6/00; B62D5/04; H01H50/12; H02H7/22; H02H5/04; H02H7/08; (IPC1-7): B62D6/00; B62D5/04
Domestic Patent References:
| JP10014089A | ||||
| JP6270824A | ||||
| JP62292576A | ||||
| JP11313466A | ||||
| JP11115775A |
Attorney, Agent or Firm:
Hidemi Kashima