Fast Torque Response and Reduced Pulse Width Modulation Switching Frequency Based on Model Predictive Direct Torque Control and Selective Harmonic Elimination

Abstract

Optimized pulse patterns, such as the selective harmonic elimination pulse width modulation (PWM) pattern (SHE-PWM) are used to suppress current harmonics at steady-state. However, achieving fast dynamic performance is very difficult in systems operated by SHE-PWM. This paper proposes a method that combines the performance of SHE-PWM at a steady-state with the fast torque response of model predictive direct torque control at the transient-state. Finally, the control performance of the proposed system is evaluated based on the experimental results.