基于时域分析的CLLC双向谐振变换器优化设计
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摘要
利用时域分析对CLLC双向谐振变换器优化设计,给出电路正向和反向工作各个模态的精确波形表达式和增益曲线。基于基波分析法的频域分析在偏离谐振点难以给出精确的增益结果,时域分析利用状态方程求解可以得到CLLC变换器的精确增益,便于电路参数设计,同时可利用精确波形表达式进行损耗分析,以优化系统效率。依照所提出的时域分析优化设计方法,搭建并测试了一台3.3 kW的实验样机,实验结果验证了时域优化设计方法的可行性和有效性。该CLLC双向谐振变换器正向和反向变换最大效率达到98%以上。
A time domain analysis method is proposed for optimal design of CLLC bi-directional resonant converter.The exact waveforms expressions and gain curves of each mode on forward and reverse operation of the circuit are given.The frequency domain analysis based on the fundamental analysis method is not accurate when deviating from the resonance point.While the time-domain analysis method can obtain the precise gain by using the state equation solving technique,which is convenient for the design of circuit parameters.At the same time,the loss analysis is carried out by the accurate waveform expression to optimize the system efficiency.A 3.3 kW experimental prototype is built and tested based on the time domain analysis and optimization design method.The experimental results verify the feasibility and effectiveness of the time-domain optimization design method.The maximum efficiency of the CLLC bidirectional resonant converter is over 98%.
A time domain analysis method is proposed for optimal design of CLLC bi-directional resonant converter.The exact waveforms expressions and gain curves of each mode on forward and reverse operation of the circuit are given.The frequency domain analysis based on the fundamental analysis method is not accurate when deviating from the resonance point.While the time-domain analysis method can obtain the precise gain by using the state equation solving technique,which is convenient for the design of circuit parameters.At the same time,the loss analysis is carried out by the accurate waveform expression to optimize the system efficiency.A 3.3 kW experimental prototype is built and tested based on the time domain analysis and optimization design method.The experimental results verify the feasibility and effectiveness of the time-domain optimization design method.The maximum efficiency of the CLLC bidirectional resonant converter is over 98%.
引文
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[2]Gregory Ivensky,Svetlana Bronshtein,Alexander Abramovitz.Approximate Analysis of Resonant LLC DC/DC Converter[J].IEEE Trans.on Ind.Electron.,2011,26(11):3274-3284.
[3]Wei Chen,Ping Rong,Zhengyu Lu.Snubberless Bidirectional DC/DC Converter With New CLLC Resonant Tank Featuring Minimized Switching Loss[J].IEEE Trans.on Ind.Electron.,2010,57(9):3075-3086.
[4]Xiang Fang,Haibing Hu,Lin Chen,et al.Operation Analysis and Numerical Approximation for the LLC DC/DC Converter[A].Annual IEEE Applied Power Electronics Conference and Exposition(APEC)[C].2012:870-876.
[2]Gregory Ivensky,Svetlana Bronshtein,Alexander Abramovitz.Approximate Analysis of Resonant LLC DC/DC Converter[J].IEEE Trans.on Ind.Electron.,2011,26(11):3274-3284.
[3]Wei Chen,Ping Rong,Zhengyu Lu.Snubberless Bidirectional DC/DC Converter With New CLLC Resonant Tank Featuring Minimized Switching Loss[J].IEEE Trans.on Ind.Electron.,2010,57(9):3075-3086.
[4]Xiang Fang,Haibing Hu,Lin Chen,et al.Operation Analysis and Numerical Approximation for the LLC DC/DC Converter[A].Annual IEEE Applied Power Electronics Conference and Exposition(APEC)[C].2012:870-876.