ZVS移相全桥低压大电流开关电源的设计∗

摘要

设计制作了一款ZVS移相全桥变换器的低压大电流开关电源，详细阐述了部分电路的设计过程和参数计算，并通过抑制桥式变换器中超前/滞后桥臂功率管的高频谐振，降低主电路中上下桥臂的直通风险。最后设计制作的3 kW(15 V/200 A)低压大电流电源验证了设计的可行性，给出了详细的实验结果，整机效率达90%以上，对电源开发者有一定的借鉴作用。%A low voltage and high current switching power supply based on ZVS Phase-shifted Full-bridge converter is proposed. And the design process and parameters of power supply are introduced. In order to solve the short cir-cuit problem of bridge arms generated by the oscillation of the MOSFET gate,an improved design of driving circuit is proposed,which can eliminate the parasitic oscillation and voltage spikes effectively. Finally,a 3 kW( 15 V/200 A) prototype converter is built and the experimental results verify the effectiveness of design.