Improving crest factor of electronic ballast-fed fluorescent lamp current using pulse frequency modulation
Improving crest factor of electronic ballast-fed fluorescent lamp current using pulse frequency modulation
复制标题
利用脉冲频率调制提高电子镇流器供电荧光灯电流的波峰因数
DOI：
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发表时间：
2001
期刊：
影响因子：
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通讯作者：
Ju
中科院分区：
文献类型：
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作者：
Jooho Song;Joong;I. Choy;Ju
针对采用填谷式无源功率因数校正（PFC）电路的电子镇流器用于荧光灯管供电的情况，研究了一种降低灯电流峰值因数的新方法。众所周知，为高输入功率因数提供的50%填谷无源PFC导致荧光灯电流的波峰因数的不期望值。为了将波峰因数减小到较低值，基于由无源PFC电路预定的DC链路电压的波形的脉冲频率调制技术被用于电子镇流器的开关控制动作中。基于方程的分析灯电流的波峰因数和改变逆变器的开关频率的效果进行了全面。仿真和实验结果验证了该控制方案的有效性。
In case where electronic ballast employing a valley-fill passive power-factor correction (PFC) circuit is used for feeding fluorescent tamps, a new method to reduce crest factor of the lamp current is studied in this paper. It is known that a 50% valley-fill passive PFC provided for high input power factor results in undesirable value of crest factor of the fluorescent lamp current, In order to reduce crest factor to a lower value, a pulse frequency modulation technique based on the waveform of the DC-link voltage which is predetermined by the passive PFC circuit is taken into the switching control action of the electronic ballast. An equation-based analysis between the crest factor of lamp current and the effect of varying the inverter switching frequency is comprehensively performed. Several simulation and experiment results illustrate the Effectiveness of the proposed control scheme.