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无接触传递能量的变换器-电容传递

消耗积分:0 | 格式:pdf | 大小:869 KB | 2011-12-09

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This paper presented a novel power conversionmethod of realizing the galvanic isolation by dual safetycapacitors (Y-cap) instead of conventional transformer. Withlimited capacitance of the Y capacitor, series resonant isproposed to achieve the power transfer. The basic concept is tocontrol the power path impedance, which blocks the dominantlow-frequency part of touch current and let the highfrequencypower flow freely. Conceptual analysis, simulation and designconsiderations are mentioned in this paper. An 85W AC/ACprototype is designed and verified to substitute the isolationtransformer of a CCFL LCD TV backlight system. Comparedwith the conventional transformer isolation, the new method isproved to meet the function and safety requirements of itsspecification while has higher efficiency and smaller size.
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