零电压开关移相全桥可调电流源

采用移相全桥控制策略,介绍了峰值功率为1 kVA,输出电流在0.2～1A之间连续可调电流源的工作原理和参数设计.其中增加辅助谐振电感使得滞后桥臂实现了ZVS,主变压器原边并联了电容以降低副边整流管电压应力.实验结果表明,输出电流调节范围宽,运行稳定可靠.

ZVS Phase Shifted Full Bridge Adjustable Current Stabilizer

The operation principle and parameter design of a 1 kVA adjustable current stabilizer are presented with phase shifted full bridge control. The output current of the proposed converter is from 0.2 A to 1 A. Auxiliary resonance inductance is added to achieve ZVS of lagging leg. A capacitance is connected in parallel with the primary side of power transformer to suppress the voltage stress of the rectifying diodes. The experimental results of the proposed current stabilizer show that it has universal output current and high reliability.