中国电机工程学报
中國電機工程學報
중국전궤공정학보
ZHONGGUO DIANJI GONGCHENG XUEBAO
2014年
33期
5836-5845
,共10页
陈章勇%许建平%吴建雪%贺明智
陳章勇%許建平%吳建雪%賀明智
진장용%허건평%오건설%하명지
零纹波Boost变换器%耦合电感%高增益%新能源
零紋波Boost變換器%耦閤電感%高增益%新能源
령문파Boost변환기%우합전감%고증익%신능원
zero-ripple Boost converter%coupled-inductor%high voltage gain%renewable resources
光伏、燃料电池等新能源系统的应用使低输入电流纹波高增益DC-DC变换器成为研究热点。在一种零输入电流纹波Boost变换器基础上,采用耦合电感,提出一种零输入电流纹波高增益非隔离DC-DC变换器。通过设计耦合电感变比,可实现变换器的高升压增益特性。耦合电感中存在的漏感在减缓二极管关断电流的 di/dt 的同时,却带来了开关管两端严重的电压尖峰。为了降低开关管两端的电压尖峰,提出采用无源无损吸收电路以吸收漏感能量和开关管两端电压尖峰的零输入电流纹波高增益非隔离DC-DC变换器,进而可选取低导通电阻、低电压等级的MOSFET以降低导通损耗,提高了变换器的效率。另外,变换器几乎实现了输入电流的零纹波,基本上不需要输入滤波器,从而减小了变换器成本及体积。文中分析变换器的工作原理及工作特性,最后通过搭建一台100 W、40 V/200 V的实验样机,验证理论分析的正确性。
光伏、燃料電池等新能源繫統的應用使低輸入電流紋波高增益DC-DC變換器成為研究熱點。在一種零輸入電流紋波Boost變換器基礎上,採用耦閤電感,提齣一種零輸入電流紋波高增益非隔離DC-DC變換器。通過設計耦閤電感變比,可實現變換器的高升壓增益特性。耦閤電感中存在的漏感在減緩二極管關斷電流的 di/dt 的同時,卻帶來瞭開關管兩耑嚴重的電壓尖峰。為瞭降低開關管兩耑的電壓尖峰,提齣採用無源無損吸收電路以吸收漏感能量和開關管兩耑電壓尖峰的零輸入電流紋波高增益非隔離DC-DC變換器,進而可選取低導通電阻、低電壓等級的MOSFET以降低導通損耗,提高瞭變換器的效率。另外,變換器幾乎實現瞭輸入電流的零紋波,基本上不需要輸入濾波器,從而減小瞭變換器成本及體積。文中分析變換器的工作原理及工作特性,最後通過搭建一檯100 W、40 V/200 V的實驗樣機,驗證理論分析的正確性。
광복、연료전지등신능원계통적응용사저수입전류문파고증익DC-DC변환기성위연구열점。재일충령수입전류문파Boost변환기기출상,채용우합전감,제출일충령수입전류문파고증익비격리DC-DC변환기。통과설계우합전감변비,가실현변환기적고승압증익특성。우합전감중존재적루감재감완이겁관관단전류적 di/dt 적동시,각대래료개관관량단엄중적전압첨봉。위료강저개관관량단적전압첨봉,제출채용무원무손흡수전로이흡수루감능량화개관관량단전압첨봉적령수입전류문파고증익비격리DC-DC변환기,진이가선취저도통전조、저전압등급적MOSFET이강저도통손모,제고료변환기적효솔。령외,변환기궤호실현료수입전류적령문파,기본상불수요수입려파기,종이감소료변환기성본급체적。문중분석변환기적공작원리급공작특성,최후통과탑건일태100 W、40 V/200 V적실험양궤,험증이론분석적정학성。
High voltage gain non-isolated DC-DC converters with low input current ripple have attracted much attention for photovoltaic cells, fuel cells and other renewable energy system applications. A zero input current ripple high voltage gain non-isolated converter was proposed, which combines a zero input current ripple boost converter and a coupled-inductor cell to achieve high voltage step-up. In addition, diode reverse recovery losses of the proposed converter was alleviated due to the leakage inductance of the transformer, but it cause serious voltage spike stress of the switch. Therefore, the passive lossless clamp circuit was adopted to recycle the leakage energy and thus a low-voltage-rated MOSFET with lowRds_on for reduction of the conduction loss and cost can be chosen. In addition, the proposed converter can nearly achieve zero input current ripple, and remove the electromagnetic interference (EMI) filter without sacrificing the performance of the converter. Consequently, small passive components, light weight and low costs can be achieved. Steady state analysis of the converter and operating characteristics was developed. Finally, experimental results from a 100W 40V/200V prototype were presented to verify the analysis of the proposed converter.