井下照明电源的新型单级三相高频隔离AC/DC变换器设计

 摘要：应用电力电子变压器可以实现煤矿井下660V/127V的电压变换，作为照明电源使用。为了简化电力电子变压器的结构，降低电路损耗，本文介绍了一种新型的单级三相高频隔离的AC/DC变换器及其控制方法——采用一个功率变换级同时完成PWM整流及高频隔离DC-DC变换，并且通过软件仿真验证了该拓扑结构的可行性。最后，在此基础上完成了小功率电路的样机实验及相关结论分析。结果表明，该变换器可以应用于煤矿井下照明电源的设计中。

New Single Stage Three Phase High Frequency Isolated AC/DC Converter for Illumination Power in Underground Mine

Abstract: Using power electronic transformers can transformer 660V/127V voltage as lighting power. In order to simplify the structure of power electronic transformer and reduce the circuit losses, this paper introduces a new kind of single-stage high-frequency isolated three-phase AC/DC converter and its control method--using a power conversion stage to complete the PWM rectifier and high-frequency isolated DC/DC converter. And then we tested the fesibility of the topology through software simulation. Finally, on this basis, we completed a low-power circuit design testing and analysis of relevant conclusions. The results show that the converter can be applied to the design of lighting power supply underground coal mine.