Title:
電動パワーステアリング装置
Document Type and Number:
Japanese Patent JP5157429
Kind Code:
B2
Abstract:
When a source consisting of series-connected battery 7 and auxiliary power supply 9 supplies an electric power to a motor 4, a MOS-FET 13 for preventing a current induced by a voltage of the auxiliary power supply 9 from being reversed upstream should be off if it operates normally. Therefore, voltages at the opposite terminals of the MOS-FET 13 should have a difference which corresponds to a voltage of the auxiliary power supply 9. Hence, the voltages at the opposite terminals of the MOS-FET 13 are detected by two voltage detectors 23 and 25 when the electric power from the auxiliary power supply 9 is supplied to the motor 4. If the potential difference between the voltages at the opposite terminals of the MOS-FET 13 is equal to or less than a predetermined value, a control circuit 24 issues a failure signal upon determination that the MOS-FET 13 suffers a short-circuit fault. A MOS-FET 15 is also monitored in the same way.
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Inventors:
Shigeki Nagase
Application Number:
JP2007336427A
Publication Date:
March 06, 2013
Filing Date:
December 27, 2007
Export Citation:
Assignee:
JTEKT Corporation
International Classes:
B62D5/04; B60L3/00; B60R16/033; H02M3/155; H02P6/12
Domestic Patent References:
| JP10136687A | ||||
| JP2000244943A | ||||
| JP2004135389A | ||||
| JP2005261054A | ||||
| JP2005261180A | ||||
| JP2007131075A | ||||
| JP2007166792A |
Foreign References:
| WO2007004357A1 |
Attorney, Agent or Firm:
Patent Business Corporation Suncrest International Patent Office