Speed Sensorless Control of PMSM Using Reactive Power Compensation

무효전력 보상을 이용한 영구자석 동기전동기의 센서리스 속도제어

Speed and torque controls of permanent magnet synchronous motors are usually attained by the application of position and speed sensors. However, speed and position sensors require the additional mounting space, reduce the reliability in harsh environments and increase the cost of a motor. Therefore, many studios have been performed for the elimination of speed and position sensors. This paper investigates a novel speed sensorless control of a permanent magnet synchronous motor. The proposed control strategy compensates a speed error through the difference between the calculated and measured reactive power. The proposed algorithm is verified through the simulation and experimentation.