Driving device of DC brushless motor and its good and bad identification method

摘要

The present invention easily and quickly verifies whether the unreasonableness of the motor drive is due to the fixing of the apparatus main body side or the failure of the motor side, and it is possible to easily and quickly check whether the stator and the permanent magnets having a plurality of phase winding lines Lu, Lv, A direct-current brushless motor (1) comprising a rotor, the direct-current brushless motor (1) comprising a plurality of brushless motors Is disconnected, the position of the rotor of the motor 1 can not be detected and the motor 1 stops abnormally. At this time, since the input current becomes lower than the predetermined value, the service operation is executed and the service operation mode switch 31), and in service operation, the energizing output to each phase winding line is forcibly switched to a specific frequency, so that the upper side of the rotor And the operation of the drive unit main body is continued even if the value detection can not be performed.