Abstract：Compared with the single-module LCC converter, the multi-module LCC converters with input parallel output series (IPOS) have the advantages of modularity, small component electrical stress, small output ripple, high output voltage and high power. However, the deviation of the resonant tank parameters between the modules will cause the unbalanced module output voltage. In this paper, for the LCC resonant converter with the capacitive filter, the fundamental components of the voltage and current of the converter were calculated by the fundamental wave approximation. The state equation of the LCC converter was established adopting the generalized state-space averaging method. Then, the large-signal model of the single-module LCC converter was derived. On this basis, the large-signal model of the two-module LCC converter with input parallel and output series was derived. Through the large-signal model, the influence of the deviation of the resonant tank parameters on the output voltage balance between modules was analyzed. Finally, a prototype of the two-module LCC converter is built, which shows that the proposed large-signal model of multi-module LCC converter has good accuracy. The proposed model can provide a basis for the tolerance analysis of resonant tank parameters.
伍梁, 孙晓玮, 赵钧, 陈国柱. 基于大信号模型的多模块LCC级联变换器输出电压不均衡分析法[J]. 电工技术学报, 2020, 35(24): 5142-5151.
Wu Liang, Sun Xiaowei, Zhao Jun, Chen Guozhu. Analysis of Output Voltage Imbalance for Cascaded Multi-Module LCC Converters Based on Large-Signal Model. Transactions of China Electrotechnical Society, 2020, 35(24): 5142-5151.
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2020, Vol. 35 
