摘要
详细分析了断续导电模式(DCM)反激功率因数校正(PFC)变换器和临界连续导电模式(CRM)反激PFC变换器实现功率因数校正的工作原理。通过推导DCM和CRM反激PFC变换器的输入电流的表达式,证明2种变换器都可以实现PFC功能。进一步推导DCM和CRM反激PFC变换器的输出电压纹波峰峰值的表达式,揭示了工作模式对PFC变换器的输出电压纹波的影响,发现CRM反激PFC变换器的输出电压纹波峰峰值比DCM反激PFC变换器的输出电压纹波峰峰值小。最后通过仿真和实验验证了理论推导的正确性。
The working principle of PFC（Power Factor Correction） is analyzed for DCM（Discontinuous Con- duction Mode） and CRM（CRitical conduction Mode） flyback PFC converters. The input current expressions of DCM and CRM flyback PFC converters are deduced respectively,which proves that both converters have PFC function. The peak-to-peak output voltage ripple expressions of both conveners are further deduced, which shows the infuence of operating mode on the output voltage ripple：the peak-to-peak output voltage ripple of CRM flyback PFC converter is smaller than that of DCM flyback PFC converter. Simulative and experimental results verify the correctness of theoretical analysis.
出处
《电力自动化设备》
EI
CSCD
北大核心
2013年第9期41-46,共6页
Electric Power Automation Equipment
基金
国家自然科学基金资助项目(51177140)
中央高校基本科研业务费专项资金资助项目(2682013ZT20)~~
关键词
输出电压
纹波
断续模式
临界连续模式
功率因数校正
变换器
反激
output voltage
ripple
discontinuous conduction mode
critical coflduction mode
power factor correction
electric converters
flyback
