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单相升/降压PFC变换器分阶段电流优化控制技术研究

, PP. 122-126

Keywords: 升/降压,功率因数校正,分段优化,组合控制

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Abstract:

分析了单相级联型Boost-Buck高功率因数整流器工作原理,指出了传统双环控制方案存在的不足,在此基础上提出一种分阶段电流控制方案,并给出了程序流程图。新方案中,升压模式下采用平均电流控制,降压模式下采用电荷控制,可确保变换器在一个基波周期内的不同阶段都实现良好的输入电流控制效果,达到电流优化控制的目的。最后,通过实验对理论分析的正确性和控制方案的有效性进行了验证,并指出了后续研究工作的重点。

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