Transient performance analysis for permanent-magnet hysteresis synchronous motor

The combination of hysteresis and permanent-magnet materials in the rotor of a self-starting synchronous motor makes the motor analysis very difficult due to its inherent nonlinearity. This paper presents the simulation results of the transient performance of permanent magnet hysteresis synchronous (PMHS) motors. The major feature in this study is to combine the time-stepping finite-element technique with the model for B-H hysteresis loop in order to take the nonlinear magnetic hysteresis into account. The good agreement between computed and measured performance in a laboratory PMHS motor validates the proposed analysis.