Research on asynchronous motor rotor flux model based on PR controller

Considering the traditional integration regulator was likely to produce amplitude and phase errors for AC input signal, this paper proposes an improved induction motor rotor flux observation method based on PR regulator. In the control loop of speed and current, PR controller is used instead of PI regulator. This method decreases steady-state errors of the Integration of rotor EMF, has preferably observe precision of rotor flux and speed of motor, reduce the degree of flux aberration and improve the run characteristic. A great lot of analysis, simulations and experiments have verified the method´s feasibility and advantage.