含电压提升单元的非隔离升压变换器

发布时间：2018-01-07 09:38

本文关键词：含电压提升单元的非隔离升压变换器　出处：《科学技术与工程》2015年35期 　论文类型：期刊论文

【摘要】：提出一种新型的非隔离型高升压变换器拓扑,该变换器由一个基本Boost单元和耦合电感、电容、二极管组成的电压提升单元(coupled inductor capacitor diode cell)构成。该变换器增益比传统Boost变换器高N倍电压增益,可有效避免高升压应用场合极大占空比的出现。由于CICD单元中储能电容存在,开关管电压应力降低,因此可以选择低电压应力器件来提升效率;储能电容同样降低了输出二极管的电压应力,缓解了反向恢复问题,进一步提高了效率;CICD升压单元中二极管实现了零电流关断,解决了二极管的反向恢复问题。首先对拓扑的推演进行了阐述,然后详细分析了变换器工作原理及性能特点,最后通过saber仿真验证了理论分析的正确性。
[Abstract]:A novel non-isolated high boost converter topology is proposed, which consists of a basic Boost cell, coupled inductors and capacitors. Diode voltage lift unit coupled inductor capacitor diode cell. The gain of this converter is higher than that of conventional Boost converter. It can effectively avoid the occurrence of high duty cycle in high voltage booster application. Because of the existence of energy storage capacitor in CICD unit, the voltage stress of switch tube can be reduced, so the low voltage stress device can be chosen to improve efficiency. The energy storage capacitor also reduces the voltage stress of the output diode, alleviates the reverse recovery problem, and further improves the efficiency. The diode in the CICD boost unit realizes zero current turn-off, which solves the reverse recovery problem of the diode. Firstly, the topology of the converter is described, and then the principle and performance characteristics of the converter are analyzed in detail. Finally, the correctness of the theoretical analysis is verified by saber simulation.
【作者单位】：南京工程学院电力工程学院;东南大学电气工程学院;江苏省电力公司南通供电公司;
【基金】：江苏省自然科学基金(BK20130742) 南京工程学院校级科研基金(YKJ201316)资助
【分类号】：TM46
【正文快照】： 高升压DC/DC变换器是一类能将较低的直流电压转换为较高等级直流电压的变换器。众所周知,单个燃料电池,光伏电池模块,以及蓄电池,超级电容的输出电压较低[1,2],为了将这些电源并入电网,或者用作不间断电源,需要使用高增益DC/DC变换器以满足后级逆变的需要。高升压DC/DC变换已

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