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- W2810271250 abstract "A single-stage ac–dc converter with high power factor (PF) usually suffers from a significant output voltage ripple at double line frequency. In order to suppress such low-frequency output voltage ripple and maintain high PF, a series compensation circuit (SCC), which generates the same magnitude but 180° phase shifted low-frequency voltage ripple, is connected in series with the output of a power factor correction (PFC) converter. In this paper, an output impedance model of the SCC is established and the relationship between the output impedance of the SCC and the low-frequency output voltage ripple of an ac–dc converter is analyzed. Based on the proposed output impedance model, a low-frequency output voltage ripple can be evaluated. To further reduce the low-frequency output voltage ripple, an output impedance shaping method with a virtual impedance is presented. The implementation of the virtual impedance of the SCC with average current mode control is studied. A flyback PFC converter with a buck SCC is implemented for the study of the suppression of the low-frequency output voltage ripple. A prototype is designed to verify the analysis results." @default.
- W2810271250 created "2018-07-10" @default.
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- W2810271250 date "2019-04-01" @default.
- W2810271250 modified "2023-09-26" @default.
- W2810271250 title "Evaluation and Suppression of a Low-Frequency Output Voltage Ripple of a Single-Stage AC–DC Converter Based on an Output Impedance Model" @default.
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- W2810271250 doi "https://doi.org/10.1109/tie.2018.2850022" @default.
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