| 摘要 |
PURPOSE:To provide a motor controller which can stably control a rotating speed. CONSTITUTION:A controller 1 for a motor M compares a frequency signal proportional to a rotating speed of the motor M with that to become a reference, and controls an exciting current of the motor by an exciting current control circuit 5 based on a compared result. The controller 1 comprises an exciting current detector 6 for detecting an exciting current of the motor M, and a high frequency feedback circuit for feeding back only a high frequency component of the current detected by the detector 6 to the circuit 5 to phase- compensate it to attenuate a gain of the high frequency component of the current. With this configuration, a stable speed control is performed irrespective of the speed and a load. |
