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无极灯用多阶高频谐振变换器负载匹配的研究

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Keywords: 无极灯,多阶,谐振变换器,负载匹配,最大功率

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Abstract:

立足于无极灯用多阶高频谐振变换器,阐述了变换器的工作原理和稳态特性,引出了对高管压小功率无极灯进行负载匹配的关键问题.从起动时无极灯负载电阻很大,并且需要高压触发到稳态时灯电阻急剧变小,能够以最大功率输出以及实现开关管零电压开通等几个方面进行了理论分析和数学推导,充分考虑了无极灯负载自身在不同工作阶段的特点,得到了适合无极灯负载特性的匹配方案及其关键参数的设计方法.依据所提出的关键参数设计方法,研制了一台适用于不同工况的实验样机,实验结果证明了设计方法的有效性和可行性.

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