Journal of Power Electronics

  • 제20권5호
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  • Pages.1130-1138
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  • 2020
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  • 1598-2092(pISSN)
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  • 2093-4718(eISSN)
전력전자학회 (The Korean Institute of Power Electronics)
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DOI QR코드

DOI QR Code

Integrated low-voltage charging circuit with active power decoupling function for onboard battery chargers

  • 투고 : 2020.03.22
  • 심사 : 2020.06.18
  • 발행 : 2020.09.20
⟨ 이전 논문 다음 논문 ⟩

초록

This paper proposes a novel method to reduce the DC-link capacitor in the single-phase onboard battery chargers. A low-voltage charging circuit is used as a two-parallel buck-boost converter to absorb ripple in the DC link. Thus, the required DC-link capacitance of the onboard battery charger can be reduced significantly without adding additional switches, heat sinks, and gated drivers. In addition, the voltage of the auxiliary capacitor can be controlled to be higher than the DC-link voltage. This allows for a further reduction of the capacitance of the auxiliary capacitor. As a result, small film capacitors can be used at the DC link instead of bulky capacitor banks or additional active power decoupling circuit. Therefore, the cost and volume of the onboard battery charger are reduced significantly. By experimental results for a 2-kW SiC-based prototype, the effectiveness of the proposed circuit has been verified.

키워드

과제정보

This work was supported by the National Research Foundation of Korea (NRF) Grant funded by the Korea Government (MSIT) (NRF-2017R1A2A2A05069629).

참고문헌

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