PWM整流器的模糊滑模变结构控制

结合滑模变结构控制与模糊控制两者的优点,提出了PWM整流器的模糊滑模变结构新型复合控制方案,使PWM整流器既具有变结构控制的良好鲁棒性,又能最大限度的减小抖振。文章给出了PWM整流器的数学模型,分析了PWM整流器的空间矢量脉宽调制的实现方法,着重探讨了模糊滑模变结构控制器的设计。实验结果表明,系统能保证有很高的功率因数和输入电流较好的正弦度;能适应负载的扰动和非线性变化;具有良好的动静态性能。

PWM Rectifier With Fuzzy Sliding Mode Variable Structure Control

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 robust of variable structure control, but also minimizes vibration. Mathematical model of PWM rectifier is deducted, A easy space vector pulse width modulation scheme is analyzed, and fuzzy sliding mode variable structure control regulator is designed. Experiment results show that power factor of the system is 1 and the waveform of input current is sine waveform by the novel control strategy, and the state of the PWM rectifier can be hold to disturbance or nonlinear variety of load. Furthermore, good dynamic and static performance is indicated in the system.