Abstract
For position sensorless control of permanent magnet synchronous motor (PMSM), a single position estimation control algorithm is difficult to satisfy the accurate estimation of the rotor speed and position in wide speed range. In this paper, the influence of non-ideal factors such as inverter non-ideal factors, stator resistance changes on the accuracy of position estimation are analyzed. According to the analyze, the pulsating high frequency voltage injection method is more suitable for motor start and low speed range. The rotor position is estimated by the model reference adaptive system (MRAS) method in the high-speed stage. By using the combination of pulsating high frequency voltage injection method and MRAS, the position sensorless control of the PMSM from zero speed to high speed is realized. Simulation and experimental results shows that the proposed sensorless control system based on the complex algorithm has good dynamic response performance within full speed.
Published Version
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