自换向辅助电路零电压转换PWM变流器(二)

Self-Commutated Auxiliary Circuit ZVT PWM Converters—part 2

介绍了一类新型的零电压转换(ZVT)的直-直PWM变流器,它使用了一个与辅助开关相连接的LC谐振电路,该电路被视为一个自换向辅助电路。它在较宽的负载范围为辅助开关实现零电流换向提供了一种简单可靠的方法,而不需任何电压源。此外,这种辅助电路与主电源变流器并联,保持了零电压转换特性。还分析了这种具有自换向辅助电路的零电压转换升压PWM方案,它的可行性与可靠性由实验数据证实,实验模型的额定功率为1kW,频率为100kHz。

This paper introduces a novel class of zero voltage transition (ZVT) dc-dc pulse-width modulation(PWM) converters that use a resonant inductance-capacitance(L-C) circuit connected to the auxiliary switch, which is termed a self-commutated auxiliary circuit. It provides a simple and reliable means of achieving zero-current conditions (ZCS) for auxiliary switch commutations under wide line and load ranges, without the inclusion of any kind of dc voltage source. Furthermore, this auxiliary circuit is placed in parallel with the main power converter, retaining the ZVT characteristics. The self-commutated auxiliary circuit ZVT PWM boost is analyzed, and its feasibility and reliability are confirmed by experimental results obtained from laboratory prototypes rated at 1kW and 100kHz.