The Transactions of the Korean Institute of Power Electronics (전력전자학회논문지)

The Korean Institute of Power Electronics (전력전자학회)
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A Single-Stage AC-DC Power Module Converter for Fast-Charger

급속충전기용 파워 모듈을 위한 단일단 AC-DC 컨버터

  • LE, Tat-Thang (Dept. of Electrical & Information Engineering, Seoul Nat'l University of Science and Technology) ;
  • Choi, Sewan (Dept. of Electrical & Information Engineering, Seoul Nat'l University of Science and Technology)
  • Received : 2022.03.03
  • Accepted : 2022.03.21
  • Published : 2022.10.20
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Abstract

In this study, a single-stage, four-phase, interleaved, totem-pole AC-DC converter is proposed for a super-fast charger station that requires high power, a wide voltage range, and bidirectional operation capabilities and adopts various types of electric transport vehicles. The proposed topology is based on current-fed push-pull dual active bridge converter combined with the totem-pole operation. Owing to the four-phase interleaving effect, the bridge on the grid side can switch at 0.25, 0.5, and 0.75 to achieve a ripple-free grid current. The input filter can be removed theoretically. Switching methods for the duty of the secondary-side duty cycle are proposed, and they correspond to the primary duty cycle for reducing the circulating power and handling the total harmonic distortion. Therefore, the converter can operate under a wide voltage range. Experimental results from a 7.5 kW prototype are used to validate the proposed concept.

Keywords

Acknowledgement

이 연구는 서울과학기술대학교 교내연구비의 지원으로 수행되었습니다.

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