Large Signal Modeling for LLC Resonant Converter

Authors

Zheng Kai, 1. Information Engineering University, Zhengzhou 450001, China;;
Jianbing Li, 1. Information Engineering University, Zhengzhou 450001, China;;
Zhou Dongfang, 1. Information Engineering University, Zhengzhou 450001, China;;
Li Kai, 1. Information Engineering University, Zhengzhou 450001, China;;
Songzhen Zhang, 2. Unit 71521, Xinxiang 453000, China;

Abstract

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.

Recommended Citation

Kai, Zheng; Li, Jianbing; Dongfang, Zhou; Kai, Li; and Zhang, Songzhen (2020) "Large Signal Modeling for LLC Resonant Converter," Journal of System Simulation: Vol. 27: Iss. 5, Article 1.
Available at: https://dc-china-simulation.researchcommons.org/journal/vol27/iss5/1

First Page

921

Revised Date

2014-06-24

DOI Link

https://doi.org/

Last Page

926

CLC

TP391.9

Recommended Citation

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.