Sliding Mode Control of a Flux-Modulated Permanent-magnet In-Wheel Motor Based on a New Reaching Law

This paper proposed a new reaching law which is based on the exponential approach law. The system state and the terminal attractor are applied to suppress the chattering while maintaining strong robustness. Then, a sliding-mode speed controller of flux-modulated permanent magnet in-wheel (FMPMW) motor is developed based on this new reaching law. To improve steady-state accuracy and dynamic current/torque response performance, the current controller adopts deadbeat predictive current control (DPCC) algorithm. Thus, a composite control strategy combined SMC and DPCC for the FMPMW motor is developed. Simulation and experimental results show that the proposed control algorithm has strong robustness and better dynamic and steady-state performance.