Investigation and Implementation of Control Strategies for Flux-Switching Permanent Magnet Motor Drives

In this paper, stator-flux orientation control strategy for the flux-switching permanent magnet (FSPM) motor under two pulse width modulation (PWM) generation modes, namely current hysteresis and voltage space vector, is investigated and implemented. Firstly, the definition of d- and q-axes for the FSPM motor, which is crucial to the mathematic model and control strategy, is highlighted. The fundamental relationship and equalization between the two magnetic fields where the magnets are in the stator and rotor, respectively, are analyzed. Therefore, the control strategies and the main control system are derived and presented, in which the current hysteresis and voltage space vector are adopted and compared. Both the simulated and experimental results show that current hysteresis has a better sinusoidal current and voltage space vector may reduce torque ripple, verifying effectiveness of the stator-flux orientation control strategy for FSPM motor drive.