摘要
提出一种基于耦合电感倍压单元的零输入电流纹波非隔离型高增益DC-DC变换器。该变换器由零输入电流纹波Boost变换器和耦合电感单元组成,通过设计耦合电感电压比,实现了高升压增益特性。同时,采用无源无损吸收电路消除了漏感引起的开关管两端电压尖峰,降低了开关管的电压应力。通过增加由电容和二极管组成的倍压单元,进一步减小了开关管的电压应力,同时消除了输出二极管的电压尖峰,降低了二极管电压应力。因此,可通过选取低导通电阻、低电压等级的MOSFET,以降低变换器成本和开关管的导通损耗,提高变换器的效率。此外,还实现了变换器的零输入电流纹波,降低了输入滤波器的设计难度。文中详细分析了该变换器的工作原理及工作特性,给出了关键参数的设计原则。最后,通过实验结果验证了理论分析的正确性。
A zero-input-current-ripple high voltage gain non-isolated converter is proposed, which combines a zero-input-current-ripple boost cell with a couple inductor voltage doubler cell to achieve high step-up voltage gain with proper coupling factor. In addition, the passive lossless snubber circuit is adopted to recycle the leakage energy and therefore reduce the voltage spike stress of the switch. By utilizing a voltage-doubler cell consisting of a diode and capacitor, the voltage stress of the switch is further reduced and voltage spike of diode is eliminated, so voltage stress of diode is suppressed. Therefore, a low switch-on-resistance low-voltage-rated MOSFET for reducing the conduction loss and the cost can be employed. Furthermore, the proposed converter can achieve zero input current ripple, and therefore simplify the design of electromagnetic interference（EMI） filter. Principles and characteristics of the converter are discussed in detail. Finally, experimental results are presented to verify the analysis of the proposed converter.
出处
《电工技术学报》
EI
CSCD
北大核心
2015年第18期25-34,共10页
Transactions of China Electrotechnical Society
基金
国家自然科学基金(51177140)
中央高校基本科研业务费专项资金(2682013ZT20)资助项目
关键词
零纹波变换器
高增益
耦合电感倍压单元
无源无损吸收电路
Zero-ripple-current converter
high voltage gain
coupled inductor voltage doubler cell
passive lossless snubber circuit
