CAJ | 학술논문

提出了一种变导通时间(variable on-time，VOT)控制临界连续模式(critical conduction mode，CRM)反激功率因数校正(power factor correction，PFC)变换器的控制策略。引入输入电压和反激变压器辅助绕组电压参与CRM反激PFC变换器开关管的导通时间控制，解决了传统恒定导通时间(constant on-time，COT)控制CRM反激PFC变换器功率因数(power factor ， PF)低和总谐波畸变(total harmonic distortion，THD)高的问题。分析传统COT控制CRM反激PFC变换器和VOT控制CRM反激PFC变换器的工作原理，实验验证结果表明，VOT控制CRM反激PFC变换器比传统COT控制CRM反激PFC变换器具有更高的PF值和更低的THD。
제출료일충변도통시간(variable on-time，VOT)공제림계련속모식(critical conduction mode，CRM)반격공솔인수교정(power factor correction，PFC)변환기적공제책략。인입수입전압화반격변압기보조요조전압삼여CRM반격PFC변환기개관관적도통시간공제，해결료전통항정도통시간(constant on-time，COT)공제CRM반격PFC변환기공솔인수(power factor ， PF)저화총해파기변(total harmonic distortion，THD)고적문제。분석전통COT공제CRM반격PFC변환기화VOT공제CRM반격PFC변환기적공작원리，실험험증결과표명，VOT공제CRM반격PFC변환기비전통COT공제CRM반격PFC변환기구유경고적PF치화경저적THD。
A control strategy for critical conduction mode (CRM) Flyback power factor correction (PFC) converters which can realize unity power factor (PF) is proposed in this paper. By using input voltages and the voltage across the auxiliary winding of the Flyback transformer to control the turn-on time of the switch of the CRM Flyback PFC converter, the PF and the total harmonic distortion (THD) of the CRM Flyback PFC converter can be improved. The operation principles of the traditional constant On-Time (COT) controlled CRM Flyback PFC converters and the variable On-Time (VOT) controlled CRM Flyback PFC converter are analyzed. The experimental results show that the PF and THD of VOT controlled CRM Flyback PFC converters are better than these of COT controlled CRM Flyback PFC converters.