一种宽输入电压范围软开关电流型DC/DC转换器

针对太阳能光伏及燃料电池等领域电源需要较宽输入电压范围的需求，提出一种通用的具有较宽输入电压范围的软开关电流型DC/DC转换器。该转换器采用了固定频率混合调制设计，可以在所有工作条件下实现半导体器件的软开关工作，并采用电流馈电技术以便适用于低电压高电流的电源。相较于传统转换器，该转换器更为通用，能够实现零电压开关和零电流开关，并且能够在输入电压和负载变化出现较大变化时控制输出电压。实验结果显示，在20-60V输入电压范围内且负载出现变化时，该转换器均表现出良好的性能。

A wide input voltage range soft-switching current-mode DC/DC converter

For the power problem of solar photovoltaic (PV), fuel cells and other areas which need a wide input voltage range, a general current mode soft switching DC/DC converter was proposed which has a wide input voltage range. The converter uses a fixed modulation frequency hybrid design, which can achieve soft switching operation of the semiconductor device under all operating conditions and using current feeding technology for application in low voltage and high current power supply. Compared to conventional converters, the converter is more general, to achieve zero-voltage switching (ZVS) and zero current switching (ZCS), and is capable of controlling the output voltage of the input voltage and load changes larger changes. Experimental results show that when in the 20-60V input voltage range and load changes, the converters have shown good performance.