摘要
通过对移相控制全桥零电压开关变换器的运行过程的详细分析 ,研究了超前桥臂与滞后桥臂的开关互换动作在变换器功率传输过程中所起的作用 .另外 ,由于变换器的输出滤波部分与Buck变换器类似 ,因此 ,可将在Buck变换器闭环控制设计中获得成功应用的滑模控制引入移相控制全桥零电压开关变换器中 .仿真结果表明 ,滑模控制的变换器闭环系统对输入电源扰动具有较好的鲁棒性 ,对负载扰动的瞬态响应特性也较为理想 .
The paper studies the function and operation of a phase_shifted(PS) full_bridge(FB) zero_voltage_switched(ZVS) converter. It is concluded that the switch action in the leading leg stops power transfer from primary to secondary of the transformer, while the switch action in the lagging leg enables power transfer. So an equivalent Buck converter can be obtained, and the PS FB ZVS converter can be controlled like a Buck converter. In practical design, by employing a controller that can convert one input control to four output controls for the MOSFETs in bridge, the sliding_mode control is successfully applied to the PS FB ZVS converter.
出处
《华南理工大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2001年第4期83-86,共4页
Journal of South China University of Technology(Natural Science Edition)
基金
广东省自然科学基金资助项目! (990 5 85 )
