一种改进型准Z源耦合电感型Boost变换器
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摘要
在传统准Z源(QZS)变换器的基础上引入耦合电感和开关电容技术,提出了一种高增益改进型的QZS Boost(IQB)变换器。耦合电感的使用既可以使变换器的控制维度增加,又能在恰当的占空比条件下提高变换器的电压增益;耦合电感的漏感具有降低二极管关断电流下降率、抑制二极管反向恢复的功能;耦合电感漏感的能量可以回收再利用,提高了变换器效率;在所提变换器中开关管的电压应力得到了一定降低;分析了该变换器的工作原理及其稳态工作特性,且进行了实验验证,结果表明,所提变换器可以实现较高的电压增益。
An improved high gain Boost(IQB)converter is proposed based on the traditional quasi-Z source(QZS)converter in which coupled inductor and switched capacitor technology are introduced.The use of the coupled inductor can increase the control dimension of the converter and the voltage gain of the converter under the appropriate duty cycle.The leakage inductance of the coupled inductor has the function of lowering rate of the diode turn-off current and suppressing the diode reverse recovery problem.The energy of the coupled inductor leakage inductance can be recycled and reused,which improves the efficiency of the converter.The voltage stress of the switching tube is reduced in the proposed converter.The converter is analyzed.The working principle and its steady-state working characteristics are verified by experiments,the results show that the proposed converter can achieve higher voltage gain.
An improved high gain Boost(IQB)converter is proposed based on the traditional quasi-Z source(QZS)converter in which coupled inductor and switched capacitor technology are introduced.The use of the coupled inductor can increase the control dimension of the converter and the voltage gain of the converter under the appropriate duty cycle.The leakage inductance of the coupled inductor has the function of lowering rate of the diode turn-off current and suppressing the diode reverse recovery problem.The energy of the coupled inductor leakage inductance can be recycled and reused,which improves the efficiency of the converter.The voltage stress of the switching tube is reduced in the proposed converter.The converter is analyzed.The working principle and its steady-state working characteristics are verified by experiments,the results show that the proposed converter can achieve higher voltage gain.
引文
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[2]Moumita Das,Vivek Agarwal.Novel High-performance St-and-alone Solar PV System With High-gain High-efficiency DC/DC Converter Power Stages[J].IEEE Trans.on Industry Applications,2015,51(6):4718-4728.
[3]Khamphakdi P,Nitta M,Hagiwara M,et al.Zero-voltage Ride-through Capability of a Transformerless Back-toBack System Using Modular Multilevel Cascade Converters for Power Distribution Systems[J].IEEE Tran.on Power Electronics,2015,31(4):2730-2741.
[4]Cao Y,Lei Y,Pilawa-Podgurski R C N,et al.Modular Switched-capacitor DC/DC Converters Tied With Lithiumion Batteries for Use in Battery Electric Vehicles[A].Energy Conversion Congress and Exposition[C].2015:85-91.
[5]胡雪峰,龚春英,陈杰,等.一种高增益交错耦合电感直流变换器[J].中国电机工程学报,2014,34(3):380-386.
[6]Hu X,Gong C.A High Gain Input-parallel Output-series DC/DC Converter With Dual Coupled Inductors[J].IEEE Trans.on Power Electronics,2015,30(3):1306-1317.
[7]C Y Inab,Y Konishi,M Nakaoka.High Frequency PWM Step-up Chopper Type DC/DC Power Converters With Reduced Peak Switch Voltage Stress[J].In Proc.IEEElect.Power Applicat.,2004,151(1):47-52.
[8]D Vinnikov,I Roasto.Quasi-Z-source Based DC/DC Converters for Distributed Power Generation[J].IEEE Trans.on Ind.Electron.,2011,58(1):192-201.