具有宽负载范围和低电压应力的三态反激PFC变换器  

Tri-state Flyback PFC Converter with Wide Load Range and Low Voltage Stress

作　　者：张斐[1] 许建平[1] 阎铁生[1] 董政[1] 

机构地区：[1]西南交通大学电气工程学院,成都610031

出　　处：《电工技术学报》2015年第3期123-130,共8页Transactions of China Electrotechnical Society

摘　　要：提出一种具有宽负载范围和低电压应力的三态反激功率因数校正(PFC)变换器拓扑。通过续流功率开关管和二极管,使该变换器工作于伪连续导电模式(PCCM),拓宽了传统不连续导电模式(DCM)反激PFC变换器的带载能力,并有效地降低了传统DCM反激PFC变换器中功率开关管所承受的电压应力。通过对电路工作模态及其稳态特性的分析可知,该变换器不仅具有较好的功率因数校正能力,还具有开关管电压应力低、负载范围宽等优点。最后,通过实验结果验证了该变换器的优越性。A novel tri-state Flyback power factor correction(PFC) converter with wide range of load and low switch voltage stress is proposed. By adding power switch and diode, which makes the converter operate in pseudo continuous conduction mode(PCCM), can slove the small power limitation when the conventional flyback PFC converter works under discontinuous conduction mode(DCM). Besides, it also can reduce the voltage stress of the power switch in the conventional DCM flyback PFC converter. Operation principle and steady-state characteristic analyze are discussed in detail. It can be seen that the proposed converter can obtain good power factor correction ability, low switch voltage stress and wide load range. The performance is verified by experimental results.

关 键 词：反激变换器 伪连续导电模式 功率因数校正 三态 宽负载范围 低电压应力 

分 类 号：TM46[电气工程—电器]