Title:
Power steering device
Document Type and Number:
Japanese Patent JP5945740
Kind Code:
B2
Abstract:
In a power steering system, at least one of phase open relays in which a contact weld (an abnormality) occurs is detected. That is to say, the power steering system comprises an abnormality monitor section (57) configured to output vector control command signals to supply only a d-axis current in a positive side direction toward the motor, with all of phase open relays (58v, 58w) in an interruption state, and to determine an abnormality in at least one of the phase open relays in a case where a current value is detected by a current detection circuit which detects a current flowing into an inverter. In a case of three phase open relays installed between respective three phases of motor windings, a potential difference is detected at a neutral position of a star connection to determine the abnormality of at least two of the phase open relays.
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Inventors:
Kuzumi Takumi
Yoshitake Atsushi
Yoshitake Atsushi
Application Number:
JP2012201120A
Publication Date:
July 05, 2016
Filing Date:
September 13, 2012
Export Citation:
Assignee:
Hitachi Automotive Systems, Ltd.
International Classes:
B62D6/00; B62D5/04; H02P21/00; H02P27/04; B62D137/00
Domestic Patent References:
| JP2009261067A | ||||
| JP2007274849A | ||||
| JP10075596A |
Attorney, Agent or Firm:
Hiromichi Kobayashi
Tomioka Kiyoshi
Tsuyoshi Hashimoto
Tomioka Kiyoshi
Tsuyoshi Hashimoto
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