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Design and Implementation of Enhanced Resonant Converter for EV Fast Charger
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 Title & Authors
Design and Implementation of Enhanced Resonant Converter for EV Fast Charger
Ahn, Suk-Ho; Gong, Ji-Woong; Jang, Sung-Roc; Ryoo, Hong-Je; Kim, Duk-Heon;
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This paper presents a novel application of LCC resonant converter for 60kW EV fast charger and describes development of the high efficiency 60kW EV fast charger. The proposed converter has the advantage of improving the system efficiency especially at the rated load condition because it can reduce the conduction loss by improving the resonance current shape as well as the switching loss by increasing lossless snubber capacitance. Additionally, the simple gate driver circuit suitable for proposed topology is designed. Distinctive features of the proposed converter were analyzed depending on the operation modes and detail design procedure of the 10kW EV fast charger converter module using proposed converter topology were described. The proposed converter and the gate driver were identified through PSpice simulation. The 60kW EV fast charger which generates output voltage ranges from 50V to 500V and maximum 150A of output currents using six parallel operated 10kW converter modules were designed and implemented. Using 60kW fast charger, the charging experiments for three types of high-capacity batteries were performed which have a different charging voltage and current. From the simulation and experimental results, it is verified that the proposed converter topology can be effectively used as main converter topology for EV fast charger.
Electrical engineering;Battery chargers;Converters;Resonant power conversion;DC-DC power conversion;
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