High-Efficiency Bridgeless Single-Power-Conversion Battery Charger for Light Electric Vehicles

Charging batteries of light electric vehicles require chargers with high efficiency and a high power factor. To meet this need, this paper presents a bridgeless single-power-conversion battery charger composed of an isolated step-up ac-dc converter with a series-resonance circuit. The bridgeless con...

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Bibliographic Details
Published in:IEEE transactions on industrial electronics (1982) 2019-01, Vol.66 (1), p.215-222
Main Authors: Jeong, Seo-Gwang, Kwon, Jung-Min, Kwon, Bong-Hwan
Format: Article
Language:English
Subjects:
Alternating current
Batteries
Battery chargers
Bridge diode
Capacitors
Charging
Circuits
Conduction losses
Control theory
Diode rectifiers
Diodes
Efficiency
Electric converters
Electric vehicles
Electronic devices
Electronic equipment
Energy conversion efficiency
Feedback linearization
Inductors
Magnetic resonance
Power factor
power factor correction
Reactive power
RLC circuits
series resonance
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Summary:Charging batteries of light electric vehicles require chargers with high efficiency and a high power factor. To meet this need, this paper presents a bridgeless single-power-conversion battery charger composed of an isolated step-up ac-dc converter with a series-resonance circuit. The bridgeless configuration reduces the conduction losses associated with the input diode rectifier, and the series-resonance circuit reduces the reverse-recovery losses of the output diodes by providing zero-current switching. In addition, direct and series-resonance current injections enable bidirectional core excitation by the transformer, thereby allowing high-power capability. The control algorithm derived from feedback linearization is also developed, which allows the proposed charger to correct the power factor and regulate the output power in a single-stage power conversion. This simple circuit structure leads to high efficiency and a high power factor. The theoretical concepts of the proposed charger are verified experimentally using a 1.7-kW prototype.
ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2018.2826458