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Switching Loss Reduction for an Active Buffer DAB AC-DC Converter
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| Author(s) |
Sindisiwe MALANDA, Kain ARAI, Shohei KOMEDA, Hiroyasu KIFUNE, Shunsuke TAKUMA, Yoshiya OHNUMA |
| Abstract |
This paper proposes a new control method which can reduce a switching loss for an active buffer dual-active-bridge (DAB) AC-DC converter. The proposed control method extends a conventional phase-shifted control method for the DAB converter to control the power from the single-phase AC line and buffer capacitor to absorb the power pulsation into the buffer capacitor. The required phase-shift angle and switching frequency of the DAB converter are theoretically obtained to realize a constant output power, a sinusoidal AC-line current, and a regulated buffer capacitor voltage at the same time. Experimental results demonstrate the operation of the DAB converter with reducing the number of switching of the discharging switch to half, and thus, the power conversion efficiency has been improved from 93.4\% to 94.4\% at the 5.5-kW output. |
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| Filename: | 0165-epe2023-full-10481461.pdf |
| Filesize: | 4.778 MB |
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| Type |
Members Only |
| Date |
Last modified 2023-09-24 by System |
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