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临界连续模式单电感双输出Buck-Boost功率因数校正变换器

DOI: 10.13334/j.0258-8013.pcsee.2014.15.007, PP. 2379-2387

Keywords: 单电感双输出,功率因数校正,分时复用,临界连续模式,单级结构

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Abstract:

针对传统两级结构的多路输出功率因数校正(powerfactorcorrection,PFC)变换器成本高、体积大的问题,提出临界连续模式单电感双输出Buck-BoostPFC变换器及其控制策略,分析其工作特性,通过对电感的分时复用控制,实现了两个输出支路的独立控制。相对于传统两级结构的多路输出变换器,减少了电感与控制器的数量,降低了变换器的体积与成本,提高了变换器的效率。实验结果验证了变换器高效率、高功率因数、低总谐波失真及两个输出支路的高输出精度控制特性。

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