基于高频高压交流母线多组输出直流电源的研制

本电源是基于高频高压交流母线具有多组输出的直流电源，它具有高达200kHz的开关频率，后级的整流电路由于高频交流母线的存在，使得变压器和电感的设计变得简单，滤波电容的选择也更容易。本电源由PFC电路提供400V的高压直流输入，再由MOSFET组成全桥逆变电路，在固定额率的PWM发生电路和IR2110 MOSFET驱动电路作用下，只加—个谐振电感就可实现开关管的零电压开通，可在大大降低开关损耗和噪声的同时实现直流交流的变换。整流部分采用倍流整流电路以提高原边电压的利用率，可输出低压大电流。由于采用肖特基管，—方面可使得二板管的损耗可以接受，另外—方面还避免了采用同步整流电路所面临的电路结构复杂和驱动困难。

The Design of the DC Power Supply with Multi-output Based on the High Frequency and High Voltage AC Bus

This is a multi-output DC power supply based on the high frequency and high voltage AC bus, for the high switching frequency up to 200kHz, the design of the transformer and inductor becomes much easier and the choosing for the capacitor is easy too. The input isde is a PFC circuit with 400V DC voltage, with a full-bridge MOSFET inverter circuit, at the fixed-frequency PWM generating circuit and IR2110 driving circuit, the input DC voltage is changed to high frequency AC voltage, by only one resonant inductor, the MOSFET can achieve the zero voltage turn-on, this greatly decreases the switching lose and the switching noise. The output is a current doubler rectifier circuit to improve the usage of the primary side voltage and to output low voltage and large current, considering the usage of Schottky diode, therefor the diode lose is acceptable, and also avoiding the difficulty in the circuit organization and driving circuit in the synchronous rectifier circuit.