航空高压直流供电系统中三相Vienna整流器的控制策略研究》之四——连续和断续模式下Buck变换器的滞环滑模控制设计

A Hysteresis Sliding Mode Control Design for Vienna Rectifier in Continuous Conduction Mode and Discontinuous Conduction Mode

为提升Buck变换器的工作性能,降低其作为电子负载对Vienna整流器的不利影响,提出了一种在连续和断续工作模式下的滞环滑模控制策略。首先,设计了以输出电压误差和其微分值为状态量的滑模面,通过对Buck变换器二阶误差模型的相平面分析,确定了满足广义滑模条件的区域和连续导电模式、断续导电模式的边界及收敛情况;最终通过仿真和实验銅了上述分析的结论。

To improve the operating performance of the buck converter and reduce its adverse effect on the Vienna rectifier as an electronic load, this paper proposes a hysteresis sliding mode control strategy in continuous conduction mode and discontinuous conduction mode. Firstly, the output voltage error and its differential value are used as the states of the sliding surface, the region satisfying the generalized sliding mode condition, the border and convergence of continuous conduction mode and discontinuous conduction mode are determined through the phase plane analysis of Buck converter second-order error model. Finally, the conclusions of the above analysis are verified by simulation and experimental platform.