| 引用本文: | 阎铁生,许建平,张 斐,周国华.反激PFC变换器输出电压纹波分析[J].电力自动化设备,2013,33(9): |
| YAN Tiesheng,XU Jianping,ZHANG Fei,ZHOU Guohua.Analysis of output voltage ripple for flyback PFC converter[J].Electric Power Automation Equipment,2013,33(9): |
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| 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。 |
| 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 |
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| Analysis of output voltage ripple for flyback PFC converter |
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YAN Tiesheng, XU Jianping, ZHANG Fei, ZHOU Guohua
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Key Laboratory of Magnetic Suspension Technology and Maglev Vehicle，Ministry of Education，
School of Electrical Engineering，Southwest Jiaotong University，Chengdu 610031，China
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| Abstract: |
| 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 converters are further deduced，which shows the influence 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. |
| Key words: output voltage ripple discontinuous conduction mode critical conduction mode power factor correction electric converters flyback |
