Highly Efficient Bridgeless Dual-Mode Resonant Single Power-Conversion AC-DC Converter

This paper presents a bridgeless dual-mode single power-conversion ac-dc converter that can achieve a high conversion efficiency. By adopting a bidirectional switch, we remove a full-bridge diode rectifier from the grid side of the proposed converter, and thereby, reduce the number of components and...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2019-11, Vol.34 (11), p.10700-10709
Main Authors: Kim, Sooa, Kwon, Bong-Hwan, Kim, Minsung
Format: Article
Language:English
Subjects:
AC-DC converters
AC–DC power conversion
Algorithms
bidirectional switch
bridgeless converter
Capacitors
Circuits
Conduction losses
continuous conduction mode (CCM)
Control algorithms
Control theory
Diode rectifiers
discontinuous conduction mode (DCM)
Energy conversion efficiency
Inductance
Power factor
RLC circuits
series-resonant circuit
Switches
Switching circuits
Voltage control
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Summary:This paper presents a bridgeless dual-mode single power-conversion ac-dc converter that can achieve a high conversion efficiency. By adopting a bidirectional switch, we remove a full-bridge diode rectifier from the grid side of the proposed converter, and thereby, reduce the number of components and the primary-side conduction loss. To adapt the converter to 1-kW power applications with a bidirectional switch, we used a series-resonant circuit in the output voltage doubler on the secondary side. The series-resonant circuit also provides zero-current switching turn- off at the output diode, and thereby, reduces the reverse-recovery loss. To attain medium-high power capability with an appropriate transformer, the proposed converter operates in both discontinuous conduction mode and continuous conduction mode. The operation principle of the converter is presented and analyzed. By using the dual-mode control algorithm, the proposed converter achieves a high power factor of 0.994 and maximum efficiency of 97.3\%. Experimental results for a prototype 1-kW ac-dc converter verify these characteristics.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2019.2896605