MOTOR ROTATING SPEED CONTROLLER, ROTATING INFORMATION ISOLATING CIRCUIT AND ROTATING INFORMATION DETECTOR

摘要

PURPOSE:To detect rotating information such as a motor rotating speed signal, a rotating phase reference signal, etc., by a detector of one system. CONSTITUTION:Rotating information detected by a detector 2 from a motor 1 is isolated by an isolating circuit 4 to a rotating speed signal (FG) and a rotating phase reference signal (PG). Number of revolutions of a motor is controlled and a motor torque ripple, etc., is corrected according to the signals to stabilize rotation of the motor.