Analysis of a Modified Half-Bridge Type Inverter for Improvement of Power Factor and Harmonic Distortion

概要

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This paper deals with the analysis of a novel modified half-bridge type inverter for electronic ballast of fluorescent lamps, in which the functions of the active filter and inverter are combined, and the power factor and harmonic distortion in the input current are improved sufficiently. After discussing, the equivalent circuit model and the operation mode of the proposed half-bridge type inverter, we proceed to analyze its performance characteristics theoretically and experimentally. As a result, it is clarified that the new modified half-bridge type inverter has excellent characteristics such as high power factor over 0.97, low total harmonic distortion factor less than 11.3%, high power efficiency of 92% and low crest factor of 1.56.
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