中文摘要：

传统的ZVS移相全桥技术应用越来越广泛,但在实际应用中,其效率一般维持在86%左右。为提高电源效率,本文采用非线性饱和电感代替谐振电感;通过采集变压器原边和副边两侧电流来获得磁偏发生的相位和幅值,进而来调整FPGA输出PWM脉冲,从而快速地有效地抑制磁偏。最后利用PSIM仿真软件对该设计进行了仿真研究,其结果表明理论设计合理。并制作了一台360V/30k W、20k Hz的单元样机进行验证,实验证明,本实验方案在60%负载时效率已经达到90%以上,满载效率达到94%。

英文摘要：

Traditional ZVS phase-shifted full bridge technology is more and more widely used. But in practical applications, the efficiency is generally kept at about 86%. In order to improve the efficiency of the power supply, in this paper, the nonlinear saturation inductance is used to replace the resonant inductor. Through acquiring the current of the primary side and the secondary side of the transformer to obtain the phase and the amplitude of magnetic bias, and then making the FPGA to output PWM pulse by modulating it, the magnetic bias is effectively and quickly suppressed. At last, the simulation of the design is simulated using PSIM simulation software. The results show that the design is reasonable. At last, a 360V/30kW, 20kHz prototype of the unit is made. The efficiency of this experiment scheme has been reached to more than 90% at its 60% load. And the efficiency can reach 94% at rated load.