Analysis of a DC/DC converter with wide ZVS range and low circulating current

This paper presents a new zero voltage switching (ZVS) converter with the full-bridge and halfbridge circuits. The main advantages of the proposed converter are wide ZVS range for all leading-leg and lagging-leg switches, low circulating losses and low output inductor size. The drawback of narrow ZV...

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Bibliographic Details
Main Authors: Lin, Bor-Ren, Chen, Jia-Sheng, Chen, Jeng-Yu
Format: Conference Proceeding
Language:English
Subjects:
Bridge circuits
Circuits
Circulating
Converters
Direct current
Electric potential
Full-Bridge
Half-Bridge
Hybrid DC/DC Converter
Inductors
Logic gates
Switches
Voltage
Voltage measurement
Zero voltage switching
ZVS
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Summary:This paper presents a new zero voltage switching (ZVS) converter with the full-bridge and halfbridge circuits. The main advantages of the proposed converter are wide ZVS range for all leading-leg and lagging-leg switches, low circulating losses and low output inductor size. The drawback of narrow ZVS range of lagging-leg switches in conventional phase-shift pulse-width modulation full-bridge converter is improved by adding a half-bridge circuit shared the lagging-leg switches with the full-bridge circuit. Therefore, all switches in the proposed converter can be turned on at ZVS from low light to full load. The output of half-bridge converter is connected to the secondary side of the full-bridge converter in order to generate a positive voltage instead of zero voltage at the secondary rectified point. Hence, the high circulating losses in conventional full-bridge converter is overcome and the output inductor current ripple is also reduced. Finally, the theoretical analysis and performance of the proposed converter are verified by the experimental results from a 1.44kW prototype.
ISSN:2150-6078
2150-6086
DOI:10.1109/ICPE.2015.7168136