Constant frequency operation of parallel resonant converter for constant-current constant-voltage battery charger applications

Journal of Modern Power Systems and Clean Energy - Tập 7 - Trang 186-199 - 2018
Taha Nurettin GÜCIN1, Muhammet BIBEROĞLU1, Bekir FINCAN2
1Energy Systems Engineering Department, University of Yalova, Yalova, Turkey
2Electrical Engineering Department, İstanbul Technical University, İstanbul, Turkey

Tóm tắt

This paper proposes a design and control approach to parallel resonant converter (PRC) based battery chargers. The proposed approach is particularly suitable for the constant-current constant-voltage (CC-CV) charging method, which is the most commonly utilized one. Since the PRC is operated at two different frequencies for each CC and CV charging modes, this approach eliminates the need for complicated control techniques such as the frequency-control and phase-shift-control. The proposed method not only simplifies the design and implementation processes of the converter unit but also simplifies the design of output filter configuration and decreases the number of the required components for the control of the charger. The proposed method is confirmed by two experimental setups. The results show that the designed charger circuit ensured a very stable constant current in CC charging phase, where the charging current is fixed to 1.75 A. Although a voltage increase in CV phase is observed, the charger circuit is able to decrease the charging current to 0.5 A in CV phase, as depicted in battery data-sheet. The efficiency of the charger is figured out to be in the range of 86%-93% in the first setup, while it is found to be in the range of 78%-88% in the second setup, where a high frequency transformer is employed.

Tài liệu tham khảo

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