将滑模控制算法应用于Buck转换器的控制中,获得了快的收敛速度和良好的鲁棒性.这种控制策略可在FPGA上实现.为实现滑模控制算法,提出了一种基于拓扑结构的观测器,解决了传统观测器中传感器成本较高的问题,适用于多种开关电源结构.实验结果表明,应用滑模控制算法的Buck转换器在出现负载变化时具有很强的稳定性.“,”The sliding mode algorithm was applied to the controller of Buck converters.It had achieved fast convergence speed and strong robustness,and could be implemented on FPGA.In order to realize the sliding mode algorithm,an observer based on topological structure was proposed,which solved the problem of high cost of sensors in traditional observers,and was applicable in a variety of power circuit structures.The experimental results showed that the Buck converter based on the sliding mode algorithm exhibited a reliable stability under load change.