提出一种集成Y源网络的高升压DC-DC变换器。合理利用Y型支路,一路绕组匝比大于1,另一路绕组匝比小于1,选择合适的匝比组合,能实现比传统耦合电感更高的电压增益。在实现电压高增目的的同时,降低了开关管的电压应力。所提变换器具有传统Boost变换器输入电流连续的优点,且输入电流纹波小,这有利于电池、燃料电池和光伏组件应用。加入的无源钳位结构可将开关管关断时电压尖峰钳位至较低的电容电压,提高了变换器效率、减小了变换器的电磁耦合影响。实现了耦合电感器的零电流偏置,便于小磁芯体积的选择和低磁芯损耗。该文针对所提变换器的工作原理、特性以及参数设计进行详细说明。实验室搭建一台200 W的28 V输入和380 V输出的实验样机验证了所提变换器的可行性。
Abstract
This paper presents a Y-source network integrated high voltage step-up DC-DC converter. Using the Y-branch reasonably, the turn ratio of one winding is greater than 1 and the turn ratio of the other winding is less than 1. Selecting the appropriate turn ratio combination can achieve higher voltage gain than that of the traditional coupling inductance. While realizing the purpose of high voltage increase, the voltage stress of the switch is reduced. The proposed converter has the advantages of continuous input current and small input current ripple, which is conducive to the application of battery, fuel cell and photovoltaic panel. The added passive clamping structure can clamp the voltage peak to a lower capacitor voltage when the switch is turned off, which improves the efficiency and reduces the influence of electromagnetic coupling of the converter. The zero current bias of coupling inductor is realized, which is convenient for the selection of small core volume and low core loss. In this paper, the working principle, characteristics and parameter design of the proposed converter are described in detail. A 200 W 28 V input and 380 V output prototype is built to verify the feasibility of the proposed converter.
关键词
DC-DC变换器 /
光伏组件 /
电磁耦合 /
零电流偏置 /
Y源
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参考文献
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基金
国家自然科学基金（51477079）; 国家级创新创业项目（GC202010429058）; 省级创新创业项目（SC202010429163）
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