上海科技大学知识管理系统

This paper briefly reviews threes classes of voltage model based flux estimators. The literature review shows that flux estimators that do not rely on steady state assumptions, in turn become dependent on the information of rotor flux command or permanent magnet flux linkage parameter. This paper focuses on the saturation based flux estimator and proposes a saturation time based offset voltage identifier and permanent magnet flux linkage parameter identifier. To the authors’ knowledge, there is no sensorless permanent magnet flux linkage identifier in the literature. In most literature, this parameter is used as a crucial parameter that stabilizes the unbounded integration of back emf. Simulation results are shown to demonstrate the effectiveness of the new design.