| 摘要 |
PROBLEM TO BE SOLVED: To make it possible to control with a high corresponding reliability by providing sensor anomaly judging means and sensor specifying means, performing motor drive control corresponding to the normal time and abnormal time of the sensor, and specifying whether a trouble is at a current sensor or not. SOLUTION: A sensor specifying means comprises a trouble diagnosing circuit 13 including diagnosing signal output means and trouble sensor identifying means and a switching circuit 14. Also, a sensor anomaly judging means is a current sensor anomaly detecting circuit 30. By this configuration, if the current sensor anomaly detecting circuit 30 detects a certain anomaly, it is separated from a motor control circuit 1 as a main control means, and a diagnosing current is supplied from a sensor specifying means established separately to a three-phase motor 3. Using this diagnosing current as reference for judgment, a current sensor or another circuit, which is now being troubled, can be specified or distinguished. |
