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基于交流侧LC滤波的近正弦输入电流三相整流器

, PP. 108-113

Keywords: 整流器,无源滤波器,功率因数,谐波

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Abstract:

基于交流侧LC滤波的三相整流器尽管由来已久,但对其原理和特性并没有深入、准确地研究,且缺乏有效的设计方法。根据交流侧电容充电完成时刻的不同,将该整流器分为小、中和大负载电流三种工作模式,详细阐述了其在小负载电流模式下的工作原理;基于拓扑演变论证了该整流器和典型近正弦三相整流器的关联性;此外,提出了一种实用的参数优化设计方案并探讨了该整流器的工作特性,实现了不同模式下输入电流近正弦且与输入电压同相的目的。最后通过三台小功率(250W)样机验证了分析的正确性和设计的可行性。

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