METHOD FOR MEASURING ROTOR ANGULAR POSITION OF PERMANENT-MAGNET SYNCHRONOUS MOTOR AND POSITION SENSOR

摘要

A method for measuring a rotor angular position of a permanent-magnet synchronous motor and a position sensor. The position sensor includes a hardware circuit, a probe coil (102) and a signal plate (3). The hardware circuit generates a high-frequency oscillating current. The high-frequency oscillating current causes the probe coil (102) to generate alternating magnetic field. The magnetic field induces eddy currents on the surface of the signal plate (3). The eddy currents cause an effective impedance of the probe coil (102) to change. The effective impedance corresponds to the rotor angular position.