CAJ | 학술논문

常规单相Boost功率因数校正( PFC)电路存在功率器件电压开关应力大问题,对此提出了一种基于电感电流临界导通模式的恒定导通时间( Constant On-Time, COT)控制方法。运用COT控制策略,开关管在低压时实现零电压( ZVS)开通,高压时实现谷压( VS)开通,大大地降低了功率开关器件的电压应力。论文分析了电路的工作原理,讨论其设计方案,并研制了一台600 W样机。实验结果表明：该交错并联PFC变换器降低了输入、输出电流纹波和开关器件的电流应力,降低了变换器的开关损耗和电磁干扰。
상규단상Boost공솔인수교정( PFC)전로존재공솔기건전압개관응력대문제,대차제출료일충기우전감전류림계도통모식적항정도통시간( Constant On-Time, COT)공제방법。운용COT공제책략,개관관재저압시실현령전압( ZVS)개통,고압시실현곡압( VS)개통,대대지강저료공솔개관기건적전압응력。논문분석료전로적공작원리,토론기설계방안,병연제료일태600 W양궤。실험결과표명：해교착병련PFC변환기강저료수입、수출전류문파화개관기건적전류응력,강저료변환기적개관손모화전자간우。
Due to the high voltage and high current stress of the power switch in traditional single-phase Boost power factor correction ( PFC) circuit, a constant on-time ( COT) approach based on the critical mode operation of inductor current is proposed. By using the COT, the zero-voltage on main switch at low voltage level and the valley voltage on the switch at higher voltage can be rea-lized. The voltage stress of the power switch is reduced dramatically. The operation principle is also analyzed in detail, and the design proposal is discussed. Finally, a 600W PFC prototype is deve-loped. The experimental results show that the interleaved PFC converter lowers input-output ripple current and current stress of the power switch, thus the switching losses and electromagnetic inter-ference ( EMI) can be decreased.