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Patent Searching and Data

Document Type and Number:
Japanese Patent JP3795477
Kind Code:

PROBLEM TO BE SOLVED: To provide a motor driver in which abnormality of a current sensor can be detected regardless of the cause thereof.
SOLUTION: When a current command value for a PDU 3 is set as the torque command value of a motor 1, feedback operating units 14a and 14b compare phase currents being fed to the motor 1 with the current command value and calculate a voltage command value for driving the motor 1 according to the torque command value. A voltage loss corrector in a current sensor failure detector 19 corrects the loss in the PDU 3 for the voltage command value to calculate a corrected voltage command value being fed actually to the motor 1. Since an inverter current estimator in the current sensor failure detector 19 calculates a PDU current being estimated to flow through the PDU 3 based on the current command value and the corrected voltage command value, a current sensor judging means in the current sensor failure detector 19 makes a decision whether a battery current sensor 5 is abnormal or not by comparing a battery current detected by the battery current sensor 5 with the PDU current.

Ichihiro Hara
Junji Kato
Koji Sakai
Yuji Fujita
Application Number:
Publication Date:
July 12, 2006
Filing Date:
June 30, 2003
Export Citation:
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Honda motor industry stock company
International Classes:
G01R35/00; H02P27/06; B60L3/00; G01R31/00; H02P21/00; H02P21/14; H02P21/18; H02P21/22; H02P21/24; H02P23/14; H02P27/04; H02P27/08; (IPC1-7): H02P7/63; B60L3/00; G01R31/00; G01R35/00; H02P21/00
Domestic Patent References:
Attorney, Agent or Firm:
Masatake Shiga
Takahashi Nobuo
Masakazu Aoyama
Suzuki Mitsuyoshi
Kazuya Nishi
Murayama Yasuhiko