利用基波分析法对LLC谐振电路进行分析.pdf.pdf

利用基波分析法的串联谐振电容充电电源建模

张东辉

1, 2

, 严  萍

1

( 1. 中国科学院电工研究所, 北京 100080; 2. 中国科学院研究生院, 北京 100039)

摘 要: 为进一步研究因具有电流源特性而已广泛应用于电容器充电电路中的串 联谐振变换 器, 利用基波分析法

分析了串联谐振变换器, 建立了串联谐振变换器基波分析法的稳态模型并在适当修改后用于串联谐 振电容充电电

源的研究。用搭建的 30 kW、1 kV 电容充电 电源样 机验证的结果表明, 实验与 理论结果 在特定 条件 下非常 符合。

利用该模型可更快地确定电路工作在给定条件下的谐振 参数, 使电 源的整体效率和器件的应力都取得最优, 使用

稳态模型仿真可大大地节省仿真时间, 从而使系统的设计更快捷, 工作更稳定。

Abstract: Sinuso idal analy sis is used fo r study of ser ies resonant conver ter in details. Resonant conver ters contain a

co nt rolled switch network that driv es a linear r eso nant tank netw or k. In a resonant invert, t he tank netw or k drives

a resistiv e load. T he reactive component of the lo ad impedance can be effectiv ely incor porated into the tank netw ork.

In the case of a resonant dcdc conver ter, the r esonant tank netw o rk is connected to an uncontro lled rectifier net

w or k, filter netw ork and load. A n equivalent circuit for the co nt rolled swit ch netwo rk is given. The dc pow er sup

plied by the v olt age source is conver ted into ac po wer at the sw itch o ut put. T he output rectifier is driv en by the

near ly sinusoidal tank o utput curr ent, so the rectifier and capacitiv e filter network can be modeled using effect ive re

sisto r. T he series resonant conver ter steady state mo del is established with sinuso idal analysis and is applied in series

steady state analysis; tr ansfer function

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