具有高增益、低输入电流纹波的Boost变换器研究

发布时间：2018-01-13 13:21

本文关键词：具有高增益、低输入电流纹波的Boost变换器研究　出处：《高电压技术》2017年01期 　论文类型：期刊论文

【摘要】：针对光伏、燃料电池等低压可再生能源发电系统,在传统Boost变换器基础上,利用耦合电感的原边替代基本Boost变换器中的独立电感,同时引入一个较小的辅助电感,提出一种单开关高增益、低输入电流纹波Boost变换器。耦合电感的使用,既增加了变换器的控制维度,又能在合适占空比条件下实现较高的电压增益;较小的输入电流纹波可以改善变换器对前端低压输入电源的电磁干扰;另外,该变换器中开关管的电压应力可以得到有效降低,有利于选取低电压等级、低导通电阻的高性能开关器件,以提高变换器的性能;详细分析了该变换器的工作原理及其稳态工作特性,并通过实验验证了理论分析的正确性与有效性。结果表明,所提变换器可以实现较高的电压增益和较小的输入电流纹波,具有实用价值。
[Abstract]:For low-voltage renewable energy generation systems such as photovoltaic, fuel cells, based on the traditional Boost converter, the primary edge of the coupling inductor is used to replace the independent inductor in the basic Boost converter. At the same time, a small auxiliary inductor is introduced, and a single-switch high gain, low input current ripple Boost converter is proposed. The use of coupling inductors not only increases the control dimension of the converter. It can also achieve higher voltage gain under the condition of proper duty cycle. The small input current ripple can improve the electromagnetic interference of the converter to the front-end low-voltage input power supply. In addition, the voltage stress of the switch in the converter can be reduced effectively, which is advantageous to select the high performance switch device with low voltage grade and low on-resistance, so as to improve the performance of the converter. The principle and steady-state characteristics of the converter are analyzed in detail, and the correctness and validity of the theoretical analysis are verified by experiments. The proposed converter can achieve higher voltage gain and smaller input current ripple, which is of practical value.
【作者单位】：安徽工业大学安徽省高校电力电子与运动控制重点实验室;河海大学文天学院;
【基金】：国家自然科学基金(51577002) 安徽省自然科学基金(1408085ME80) 安徽省教育厅自然科学重点项目(KJ2012A048)~~
【分类号】：TM46
【正文快照】： 0引言1基本Boost变换器的结构简单,在一般升压场合得到了广泛应用。然而,常规Boost变换器很难实现较高电压增益,因此国内外学者研究了多种高增益直流变换器[1-8]。其中将多个Boost变换器进行级联,是实现高电压增益的有效方法[9],但是直接级联后变换器的整体效率近似等于各单级

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