基于移相控制的串联谐振变换器稳态分析

Steady State Analysis of the Series Resonant Converter Based on Phase-shifted Control

将基波分析法应用到基于移相控制的串联谐振变换器,以电路稳态模型为基础计算出变换器的电压增益、电路阻抗、谐振电容电压和谐振电感电流、电压电流应力及功率,得到这些量与工作频率、占空比及等效负载品质因数之间的数学表达式,并通过仿真图形进行直观显示。最后通过搭建的电路进行了实验验证。

The fundamental wave method is applied to analyze series resonant converter based on phase-shifted control.According to the steady state model,the expressions of voltage conversion ratio,circuit impedance,resonant inductance current and resonant capacitor voltage,voltage and current stresses against switching frequency are derived.The simulation diagrams are given to demonstrate their relationship.The experimental results verify the correctness of the analysis.