New DC Hybrid Filter for Attenuating Low-Frequency Ripple of AC-DC Power Converter |
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| Authors: | Jinn-Chang Wu Hurng-Liahng Jou Tse-Yu Lin |
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| Affiliation: | 1. Department of Microelectronics Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan;2. Department of Electrical Engineering, National Kaohsiung University of Science and Technology, Kaohsiung, Taiwan |
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| Abstract: | In this article, a new DC hybrid power filter is proposed to attenuate the low–frequency ripple of AC-DC power converter. The proposed DC hybrid power filter is connected between the DC bus of AC-DC power converter and the load, and it composes of a passive power filter and a single-arm power converter. The passive power filter can reduce the voltage rating of single-arm power converter, and the operation of single-arm power converter generates a virtual harmonic resistor connected to the load in series. The DC hybrid power filter can suppress the twice-utility-frequency ripple for eliminating the use of electrolytic capacitor. The salient feature is that the control circuit of the proposed DC hybrid power filter is simplified because only a feedforward control is used. A hardware prototype is developed to validate the performance of the proposed DC hybrid power filter. The experimental results are as expected. |
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| Keywords: | hybrid power filter AC-DC power converter electrolytic capacitor |
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