软开关无桥升压PFC的研究

2009 IEEE Vehicle Power and Propulsion Conference Pub Date : 2009-10-20 DOI:10.1109/VPPC.2009.5289522

Shiqi Jiang, Guihua Liu, Wei Wang, Dianguo Xu

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引用次数: 8

摘要

低导通损耗是无桥升压PFC拓扑结构的主要优点。为了降低开关损耗，进一步提高效率，提出了一种无源无损缓冲电路的无桥升压PFC电路。使用这种缓冲电路，电源开关在零电压开关时关闭，在接近零电压开关时打开，快速恢复二极管在零电压开关和关断时工作。在分析无桥升压PFC和无源无损缓冲电路的基础上，设计了单周期控制芯片IR1150的样机。实验结果表明，缓冲电路可以降低开关dv/dt、di/dt和开关损耗;功率因数大于0.99，在1.0kW时效率达到0.97。

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Research on bridgeless Boost PFC with soft-switching

Low conduction loss is the main advantage of bridgeless Boost PFC topology. In order to decrease switching loss and further improve efficiency, a bridgeless Boost PFC circuit with passive lossless snubber circuit is proposed. Using this snubber circuit, the power switches turn off with ZVS (zero voltage switching) and turn on with near ZCS (zero current switching) and the fast-recovery diodes operate at ZVS turn-on and turn-off. Prototype with one-cycle control chip IR1150 is designed after analyzing bridgeless Boost PFC and passive lossless snubber circuit. Experimental results verify that the snubber circuit can reduce switching dv/dt, di/dt and switching loss; the power factor is higher than 0.99 and the efficiency reaches 0.97 at 1.0kW.

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2009 IEEE Vehicle Power and Propulsion Conference

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