Fuzzy Sliding Mode Variable Structure Control of Three-Phase Rectifier

The mathematical model of control system with PWM rectifier is deducted at first. In order to achieve anticipated wave of voltage and current and improved system dynamics, a novel compound control scheme for PWM rectifier with fuzzy sliding mode variable structure control is presented, which integrates advantages of sliding mode variable structure control and fuzzy control. It makes that PWM rectifier not only has excellent robustness of variable structure control, but also minimizes chatting. The simulation results show that fuzzy sliding mode variable structure control for PWM rectifier is rather simple, and the PWM rectifier can be adaptive to load disturbance or nonlinear variety by the novel control strategy. Furthermore, good dynamic and static performance is indicated in the system.