Abstract
Hard-switching-induced switching loss can contribute significantly to the power loss of an isolated bidirectional dual-active-bridge (DAB) dc-dc converter operating at high frequency. An $LC$-type series resonant DAB converter based on a switch-controlled-inductor (SCI) is proposed to mitigate the loss arising from hard switching under wide-range variations in output voltage and current. Zero-voltage switching is achieved at the primary side (high voltage), while at the secondary side (low voltage), zero-current switching is preferred to reduce excessive ringing due to circulating current and switching loss. In order to achieve reduced conduction loss, a nominal operating point is chosen where the root-mean-square resonant tank current is the minimum. To validate the proposed topology and modulation scheme, an $LC$-type series resonant DAB converter based on SCI operating at 100 kHz is designed to interface a 400-V dc bus to a supercapacitor-based energy storage. Simulation and experimental results validate the effectiveness of the proposed topology for charging/discharging a supercapacitor with an output voltage variation of between 10 and 48 V and a maximum rated power of 480 W. A maximum efficiency of 94.6% is achieved using the proposed topology and modulation scheme.
Original language | English |
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Article number | 7820224 |
Pages (from-to) | 9093-9104 |
Number of pages | 12 |
Journal | IEEE Transactions on Power Electronics |
Volume | 32 |
Issue number | 12 |
DOIs | |
Publication status | Published - 1 Dec 2017 |
Keywords
- Dual-active-bridge (DAB) converter
- supercapacitor
- switch-controlled inductor
- zero-current switching (ZCS)
- zero-voltage switching (ZVS)
ASJC Scopus subject areas
- Electrical and Electronic Engineering