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Modulation Strategy of Dual Active Bridge DC-DC Converter for a Complete Zero Voltage Switching Operation
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| Author(s) |
Muhammad Hazarul AZMEER BIN AB MALEK |
| Abstract |
A dual active bridge (DAB) dc-dc converter has a limited soft-switching range and high circulatingcurrent with the conventional phase shift modulation (PSM) when a voltage variation occurs in theinput/output voltage. To overcome these issues, single pulse-width modulation (SPWM) and dualpulse-width modulation (DPWM) were proposed and combined into one modulation strategy calledcombined pulse-width modulation (CPWM). However, this modulation strategy still operates in thehard-switching at the low power transfer with the DPWM. This paper modifies the DPWM to operatein a complete zero voltage switching (ZVS) operation. The efficiency of the modified DPWM arecompared with a prototype for buck and boost operation. The experiment results demonstrate theincrease in the efficiency with the modified modulation strategy by operating in a complete ZVS evenif the voltage variation occurs in the input/output voltage. |
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| Filename: | 0077-epe2017-full-07260113.pdf |
| Filesize: | 1.296 MB |
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| Type |
Members Only |
| Date |
Last modified 2018-04-17 by System |
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