Position Sensorless Vector Control of Stator Resistance Estimation Function of IPMSM Using Adaptive Identification

In the position sensorless vector control of IPMSM, the high frequency signals are usually applied at low speed. However, the application of the high frequency signals will cause noise. The decrease of the noise is required in the railways usage. Therefore, the development of the method without the impression of the high frequency signals that even low speed can carry out the accurate estimation of the rotor position and the rotational speed is demanded. This paper proposes the position sensorless vector control method of IPMSM with the following feature. “Even at low speed, the influence of the stator resistance variation isn't received easily because the proposed method has the stator resistance estimation function.” The success of the proposed method is demonstrated by experiments.