Title :
Initial Rotor Polarity Detection and Sensorless Control of PM Synchronous Machines
Author_Institution :
Electr. Machines & Drives Group, Wuppertal Univ.
Abstract :
Sensorless control of a PM synchronous machine at low and zero speed is based on the injection of an oscillating high-frequency carrier signal. A particular demodulation technique serves to eliminate the estimation error introduced by the nonlinear characteristics of the inverter. The initial rotor position and the magnet polarity is detected before the drive is started. The initialization is performed by injecting an ac carrier and two short current pulses in a sequence
Keywords :
PWM invertors; machine control; permanent magnet machines; position control; reluctance motor drives; rotors; starting; synchronous machines; ac carrier signal injection; demodulation technique; estimation error; high-frequency signal injection; initial rotor polarity detection; initial rotor position; magnet polarity; nonlinear inverter characteristics; permanent magnet synchronous motor; sensorless control; zero speed operation; Anisotropic magnetoresistance; Magnetic anisotropy; Magnetic flux; Magnetic separation; Perpendicular magnetic anisotropy; Rotors; Saturation magnetization; Sensorless control; Synchronous machines; Voltage; Permanent magnet synchronous motor; initial rotor position; sensorless control; zero speed operation;
Conference_Titel :
Industry Applications Conference, 2006. 41st IAS Annual Meeting. Conference Record of the 2006 IEEE
Conference_Location :
Tampa, FL
Print_ISBN :
1-4244-0364-2
Electronic_ISBN :
0197-2618
DOI :
10.1109/IAS.2006.256816
