Research on IPMSM position decoupling control without filter

Abstract

In this paper, a new method of decoupling sensorless and filterless IPMSM (Interior permanent magnet synchronous motor) high frequency square wave is proposed, which is a new method of decoupling the rotor position of the motor and forming a stable control system by injecting high frequency square wave into the static shafts and computing the signal delay. Due to the high frequency square wave injection method, the influence of rotor resistance is reduced and the estimation accuracy is improved. At the same time, the decoupling method without filter is adopted to avoid filter interference and improve system bandwidth. In this paper, a better observer than PI observer is adopted, so that the system estimation accuracy is higher and the anti-interference performance is stronger. Finally, the simulation is realized by matlab.