谐振开关电容变换器的潜电路特性

Sneak Circuit Characteristic of Resonant Switched Capacitor Converter

潜电路是一种潜伏在系统中的路径或状态,仅在特定的条件下产生,使系统出现非期望的功能.本文以一个降压式谐振开关电容变换器为例,详细分析了潜电路出现时变换器的工作过程,利用电路能量守恒定理推导出变换器的潜电路特性以及潜电路发生条件.得到潜电路出现后,变换器的输出电压不再保持恒定,而是与电路参数、运行条件等密切相关,呈现出非预期特性的结论,并用实验结果加以证实.

Sneak circuit is a latent circuit path or condition that causes undesired function to occur at some certain conditions. A step-down resonant switched capacitor （RSC） converter was used as an example to analyze the converter operating process with sneak circuit state. The sneak circuit characteristics and the sneak circuit operating conditions were derived by law of energy conservation. When sneak circuits appear, the output voltage doesn＇t keep constant, but relates to converter parameters or operating conditions. The converter shows the undesired behaviors under sneak circuit state, which have been verified by experimental results.