适合地下工作的宽范围输入直流稳压电源的研制

针对矿用电动车在地下工作，环境恶劣，输入电压范围较宽的情况，设计了一款开关电源，主电路拓扑选用结构简单，可靠性高的双管正激电路。文中介绍了其主电路的工作原理，尤其对每种工作模态进行了详细的理论分析，并给出了双管正激电路主要参数的设计。在此基础上，研制了一台交流输入为180V-280V的双管正激变换器。该变换器性能良好，运行可靠，实验结果表明其适合宽范围电压输入并且效率较高，验证了理论分析的正确性。

Research on DC Power Supply of Wide Range Input Voltage for Underground Work

Aiming at the mining electric vehicles that work underground with terrible conditions and wide range input voltage, this paper proposes a switching power supply whose main circuit structure is dual-transistor forward topology with simple structure and high reliability. It analyses the work principle of this circuit and the theory of each work mode in de- tail, gives design for the main parameters of dual-transistor forward circuit. Then a dual-transistor forward Converter with alternating input of 180 V-280 V is designed, which has good performance and reliable operation. The experiment results show that this converter is suitable for wide range input voltage and with high efficiency.