高频双Buck全桥逆变器的功率损耗分布分析
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摘要
为了对高频条件下的变换器效率进行更加精准的估算,基于一台400 kHz高频双buck逆变器,提出了适用于高频变换器的损耗分布分析方法。该方法在分析开关过程的基础上,对开关管、二极管的开关损耗和导通损耗进行了详细估算,并根据电感磁滞回线,同时计及高频条件下的电容损耗对其磁性损耗进行了估算。此法充分考虑了高频工况对变换器损耗分布的影响,更好地实现了对系统变换效率的估算,对指导参数设计和功率元件选择具有重要意义。为验证理论分析的可靠性,对由不同半导体器件组成的1 kW实验样机进行了实验测试和分析对比。实验结果表明,所述方法在高频工况下有更高的估算精度,计算效率为97.32%,相应实验效率为96.1%。
To more accurately estimate the converter efficiency under high-frequency conditions,based on a 400 kHz high-frequency dual-Buck inverter,a loss distribution analysis method suitable for high-frequency converters is proposed in this paper.According to the analysis of the switching process,the switching loss and conduction loss of switch tube and diode are estimated in detail,and the magnetic loss is estimated based on inductance hysteresis loop.At the same time,the capacitance loss at high frequency is also considered.This method fully takes account of the influence of high-frequency working conditions on the loss distribution of the converter,and achieves better estimation of the system’s transformation efficiency,which is significant for guiding the parameter design and power element selection.Finally,to verify the reliability of theoretical analysis,tests and comparative analysis were conducted on a 1 kW experimental prototype composed by different semiconductor components.Experimental results showed that the proposed method had a higher estimation accuracy under high-frequency working conditions;the calculation efficiency was97.32%,while the corresponding experimental efficiency reached 96.1%.
To more accurately estimate the converter efficiency under high-frequency conditions,based on a 400 kHz high-frequency dual-Buck inverter,a loss distribution analysis method suitable for high-frequency converters is proposed in this paper.According to the analysis of the switching process,the switching loss and conduction loss of switch tube and diode are estimated in detail,and the magnetic loss is estimated based on inductance hysteresis loop.At the same time,the capacitance loss at high frequency is also considered.This method fully takes account of the influence of high-frequency working conditions on the loss distribution of the converter,and achieves better estimation of the system’s transformation efficiency,which is significant for guiding the parameter design and power element selection.Finally,to verify the reliability of theoretical analysis,tests and comparative analysis were conducted on a 1 kW experimental prototype composed by different semiconductor components.Experimental results showed that the proposed method had a higher estimation accuracy under high-frequency working conditions;the calculation efficiency was97.32%,while the corresponding experimental efficiency reached 96.1%.
引文
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[2]汪英,周乐明(Wang Ying,Zhou Leming).LCL型并网逆变器的GCFAD优化设计方法(Optimized design method of grid current feedback active damping for LCL-type gridconnected inverter)[J].电力系统及其自动化学报(Proceedings of the CSU-EPSA),2017,29(10):130-137.
[3]Fatemi A,Azizi M,Mohamadian M,et al.Single-phase dual-output inverters with three-switch legs[J].IEEE Trans on Industrial Electronics,2013,60(5):1769-1779.
[4]Zhou Yufei,Huang Wenxin,Hong Feng,et al.Modelling analysis and power loss of coupled-inductor single-stage boost inverter based grid-connected photovoltaic power system[J].IET Power Electronics,2016,9(8):1664-1674.
[5]Han Ying,Chen Weirong,Li Qi.Energy management strategy based on multiple operating states for a photovoltaic/fuel cell/energy storage DC microgrid[J].Energies,2017,10(1):136-150.
[6]Holtz J,Holtgen M,Krah J O.A space vector modulator for the high-switching frequency control of three-level SiCinverters[J].IEEE Trans on Power Electronics,2014,29(5):2618-2626.
[7]Shammas N,Chamund D,Taylor P.Forward and reverse recovery behavior of diodes in power converter applications[C]//24th International Conference on Microelectronics.Nis,Serbia,2004:3-10.
[8]Gurpinar E,Castellazzi A.Single-phase T-Type inverter performance benchmark using Si IGBTs,SiC MOSFETs,and GaN HEMTs[J].IEEE Trans on Power Electronics,2016,31(10):7148-7160.
[9]Matsumori H,Shimizu T,Takano K,et al.Evaluation of iron loss of AC filter inductor used in three-phase PWMinverters based on an iron loss analyzer[J].IEEE Trans on Power Electronics,2016,31(4):3080-3095.
[10]Hong Feng,Liu Jun,Ji Baojian,et al.Single inductor dual Buck full-bridge inverter[J].IEEE Trans on Industrial Electronics,2015,62(8):4869-4877.--------