Reduction of DC-Link Capacitance in Single-Phase Non-Isolated Onboard Battery Chargers


Vol. 19, No. 2, pp. 394-402, Mar. 2019
10.6113/JPE.2019.19.2.394


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 Abstract

This paper proposes a single-phase non-isolated onboard battery charger (OBC) for electric vehicles (EVs) that only uses small film capacitors at the DC-link of the AC-DC converter. In the proposed charger, an isolated DC-DC converter for low-voltage batteries is used as an active power decoupling (APD) circuit to absorb the ripple power when a high-voltage (HV) battery is charged. As a result, the DC-link capacitance in the AC-DC converter of the HV charging circuit can be significantly reduced without requiring any additional devices. In addition, some of the components of the proposed circuit are shared in common for the different operating modes among the AC-DC converter, LV charging circuit and active power filter. Therefore, the cost and volume of the onboard battery charger can be reduced. The effectiveness of the proposed topology has been verified by the simulation and experimental results.


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Cite this article

[IEEE Style]

H. V. Nguyen, S. Lee and D. Lee, "Reduction of DC-Link Capacitance in Single-Phase Non-Isolated Onboard Battery Chargers," Journal of Power Electronics, vol. 19, no. 2, pp. 394-402, 2019. DOI: 10.6113/JPE.2019.19.2.394.

[ACM Style]

Hoang Vu Nguyen, Sangmin Lee, and Dong-Choon Lee. 2019. Reduction of DC-Link Capacitance in Single-Phase Non-Isolated Onboard Battery Chargers. Journal of Power Electronics, 19, 2, (2019), 394-402. DOI: 10.6113/JPE.2019.19.2.394.

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  ISSN : 1598 - 2092
eISSN : 2093 - 4718