采用倍流整流移相全桥的ZVZCS直流变换器研究  

Study on ZVZCS Phase-Shift Full-Bridge DC Converter with Current-Double Rectifier

作　　者：刘殿勋[1] 吴正国[1] 李玉梅[1] 黄海[1] 

机构地区：[1]海军工程大学电气与信息工程学院,湖北武汉430033

出　　处：《通信电源技术》2010年第5期1-5,共5页Telecom Power Technology

摘　　要：在传统的移相全桥ZVZCS直流变换器中,输出侧多采用全波整流式结构,在大电流输出条件下这种结构将增加输出滤波电感和变压器的体积以及整流管上的电压应力,不利于在低压大电流输出场合的应用。针对这种情况,文章在输出侧采用一种适宜应用在低电压大电流输出场合的倍流整流式结构,使变压器和输出滤波电感的设计得到简化,并且输出整流二极管实现了零电流自然关断,降低了功率器件的应力与开关损耗,适合于大功率场合;文中还简单讨论了软开关的实现范围和参数的设计等问题。最后,在以上分析的基础上,设计了一台输出电压为27V,输出功率为3kW的电源,利用Matlab/Simulink进行了仿真,并给出了相应的仿真结果。The full-wave rectifier is usually used in the output side of the traditional phase-shift full-bridge ZVZCS DC converter, but it would make the size of filter inductor and transformer increased, and at the same time, the stress of the rectifiers diodes is increased. It is not suitable to be used in the occasion of low DC voltage and large current. To overcome these weakness, the current-double rectifier, which is sutiable for the occasion of low DC voltage and large current, is used in the output side of the converter. It can simplify the design of transformer and output filter inductor, make the rectifier diodes commute naturally, and reduce the stress and power dissipation of the power elements. The soft-switching operating range and the design considerations were discussed also. Finally, a 3 kW DC converter with input voltage 550-650 V, output voltage 27 V was designed based on the above analysis. The converter was simulated in Matlab/Simulink, and the related simulation results were given.

关 键 词：移相全桥 ZVZCS 倍流整流器 

分 类 号：TM461.5[电气工程—电器]