摘要
针对传统单级反激功率因数校正PFC(power factor correction)变换器存在工作效率低、变换器开关管和输出二极管电压应力大等缺点,研究了一种次级谐振单级反激PFC变换器,不仅能够合理利用次级漏感能量,提高变换器效率,而且有效解决了传统单级反激变换器开关管、输出二极管电压应力较大的问题;同时还分析了次级谐振单级反激PFC变换器工作于电感电流断续模式DCM(discontinuous current mode)时的工作模态及其稳态工作特性,并将该变换器应用于LED驱动电路。最后,通过实验验证了理论分析的正确性。
To improve the problems of low efficiency, high voltage stress for the switch and diode, a secondary side resonant single-stage flyback PFC converter is studied, which can improve efficiency by recycling the energy of the secondary side leakage inductance and alleviate the high voltage stress of the switch and diode. The working mode of the secondary side resonant single-stage flyback PFC converter in DCM is analyzed and the steady state characteristic is studied, and the converter is applied to the LED driver circuit. Finally, the theoretical analysis is verified by experimental results.
出处
《电源学报》
CSCD
2015年第1期56-60,共5页
Journal of Power Supply
基金
中央高校基本科研业务费专项资金项目(SWJTU2011CX003EM)~~
关键词
功率因数校正
断续导电模式
次级漏感谐振
LED驱动
power factor correction
discontinuous current mode
secondary side resonant
LED driver circuit
