A Speed Estimation based on the Very Quick Torque Controlmethod of Induction Motors

유도 전동기의 토크 속응 제어방식에 근거한 속도 추정법의 제안

In this paper, a new speed estimation method of induction motors based on the very quick torque control is proposed to realize speed sensorless control. The proposed method can be realized very simply by detecting primary motor current and voltage command at every sampling time. As the method need not the differential value of primary current in a arithmetic of voltage command, it can be expected to promote the precision of speed estimation in low speed area, especially. Through the numerical simulation, the validity of the proposed method was successfully confirmed.