一种两象限零电压开关准谐振DC-DC转换器设计

摘要

传统的DC-DC转换器由电感、电容构成，通常电感和电容的面积很大，而且在开关导通和关断时的损耗严重。开关电感的两象限DC-DC转换器同时具有高功率密度和高转换效率，但是其开关导通和关断时的功率损耗仍然很严重。软开关技术可以实现开关导通和关断时的零功率损耗，从而大大减小了转换器的功率损耗。文章设计了一种新型的两象限零电压开关DC-DC转换器（ZVS-QRC），有效减小了功率损耗，并提高了功率密度和转换效率。%The classical DC/DC converters consist of inductors and capacitors, they usually are large and their power losses are high during switching-on and switching-off. A switched inductor DC/DC converter with two-quadrant operation can have characteristics of high power density and transfer efficiency. However, its power losses are still high during switching-on and switching-off. Soft switching technique implements the zero-power-consumption operation during switching-on and switching-off. Therefore, it largely reduces the power losses of the converter. This topic is a novel approach to investigate a two-quadrant DC/DC Zero-Voltage-Switching quasi-resonant converter (ZVS-QRC), which effectively reduces the power losses, and largely increases the power density and power transfer efficiency.