POSITION DETECTOR FOR MOTOR

摘要

PROBLEM TO BE SOLVED: To realize compensation for positional error and improvement of position accuracy by arithmetic process of a sensor output for detection of rotor magnetic pole position of a 3-phase motor. SOLUTION: An average value of the calculated value and an actually measured value is obtained from an output of a rotor magnetic pole position detecting sensor of the 3-phase motor. As a result, positional (phase) displacement is compensated and rotating accuracy of the motor can also be improved by feeding a compensation signal to the motor.