LLC谐振功率变换器的大信号建模研究

系统仿真学报 ›› 2015, Vol. 27 ›› Issue (5): 921-926.

• 建模与仿真理论及方法 • 下一篇

LLC谐振功率变换器的大信号建模研究

郑锴¹, 李建兵¹, 周东方¹, 李凯¹, 张松振²

1.信息工程大学信息系统工程学院, 河南郑州 450001;
2.71521部队, 河南新乡 453000

收稿日期:2014-04-22 修回日期:2014-06-24 出版日期:2015-05-08 发布日期:2020-09-01
作者简介:郑锴(1983-),男,河南人,博士生,研究方向为谐振功率变换器建模与控制;李建兵(1976-),男,湖北人,副教授,研究方向为功率变换技术;周东方(1963-),男,浙江人,教授,研究方向为功率变换技术。

Large Signal Modeling for LLC Resonant Converter

Zheng Kai¹, Li Jianbing¹, Zhou Dongfang¹, Li Kai¹, Zhang Songzhen²

1. Information Engineering University, Zhengzhou 450001, China;
2. Unit 71521, Xinxiang 453000, China

Received:2014-04-22 Revised:2014-06-24 Online:2015-05-08 Published:2020-09-01

摘要/Abstract

摘要： 采用平均大信号建模法,结合全桥LLC谐振倍压功率变换器,开展LLC谐振功率变换器的大信号建模研究。分析了SSOC(Self-sustained oscillation controller)调制方式,在该调制方式下LLC谐振功率变换器的工作模式;建立了LLC谐振功率变换器的非线性状态空间模型,分析了非线性项的近似线性化、谐波平衡等处理环节,推导出LLC谐振功率变换器的平均大信号模型;通过仿真表明,平均大信号模型与非线性状态空间模型的仿真曲线基本吻合,验证了平均大信号模型的准确性。该大信号模型适用于指导LLC谐振功率变换器的现代非线性控制回路的设计。

关键词: LLC谐振变换器, 大信号模型, 非线性系统, SSOC调制

Abstract: The large-signal model modeling issue of LLC resonant converter was dealt with by using averaged large-signal modeling method, on the basis of a full-bridge LLC voltage-multiplying resonant converter. The SSOC (self-sustained oscillation controller) was analyzed, and the operation mode of LLC resonant converter under the SSOC mode was investigated. The nonlinear state space model of LLC resonant converter was established by analyzing linear approximation of nonlinear terms and harmonic balance, and the averaged large-signal model of LLC resonant converter was proposed. Two curves of large signal model and nonlinear state space model were proved to be identical by simulation, indicating that the proposed large-signal model is accurate. This averaged large-signal model can be used to guide the design of the nonlinear control loop.

Key words: LLC resonant converter, large-signal model, nonlinear system, SSOC

中图分类号:

TP391.9

郑锴, 李建兵, 周东方, 李凯, 张松振. LLC谐振功率变换器的大信号建模研究[J]. 系统仿真学报, 2015, 27(5): 921-926.

Zheng Kai, Li Jianbing, Zhou Dongfang, Li Kai, Zhang Songzhen. Large Signal Modeling for LLC Resonant Converter[J]. Journal of System Simulation, 2015, 27(5): 921-926.

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LLC谐振功率变换器的大信号建模研究

Large Signal Modeling for LLC Resonant Converter

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