INVERTER CONTROL CIRCUIT FOR SENSORLESS MOTOR, AND SENSORLESS MOTOR CONTROLLER EQUIPPED WITH THE SAME

摘要

PPROBLEM TO BE SOLVED: To provide a sensorless motor controller, which can control a q-axis command current corresponding to requested torque, and to provide a control circuit for sensorless motors which is able to realize sensorless motor controller. PSOLUTION: Since a q-axis command current is controlled at switchover, to be made to correspond to a phase difference generated between a control axis qc-dc and magnetic flux vector in this sensorless control circuit, a current value at finish of forced operation work is made into a value corresponding to a load. Moreover, according to the sensorless motor controller, the current value of the q-axis command current is set, in response to the load by the control circuit for sensorless motor, so that smooth drive matching the load is realized in a rotor 302 of the sensorless motor 300. PCOPYRIGHT: (C)2011,JPO&INPIT