Journal
IET ELECTRIC POWER APPLICATIONS
Volume 14, Issue 4, Pages 685-694Publisher
INST ENGINEERING TECHNOLOGY-IET
DOI: 10.1049/iet-epa.2019.0406
Keywords
coils; capacitors; inductive power transmission; voltage control; compensation; reconfigurable WPT system; reconfigurable wireless charging topology; communication link; receiving coils; CC-CV modes; LCL compensation; transmitting side; CV output operations; CC-CV operation
Categories
Funding
- SERB, Department of Science and Technology, Government of India
- Ministry of Electronics and Information Technology, Government of India
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This study proposes a reconfigurable wireless charging topology, which achieves load-independent constant current (CC) and constant voltage (CV) output without any communication link between transmitting and receiving coils. The proposed topology is suitable for CC-CV modes of battery charging. Inductor (L), capacitor (C) and inductor (L) connected as T type (LCL) compensation with an auxiliary capacitor on the transmitting side and series (S) compensation on the receiving side (LCL-S) is used to achieve load-independent CC and CV output. Reconfiguration has been achieved using single AC switch on transmitting side. Control has been implemented with the information on transmitting side. Load-independent CC and CV output operations have been analysed analytically. The merits of the proposed topology are fixed-frequency operation, simplified control scheme for load-independent CC-CV operation without any communication link. Feasibility of the proposed topology is verified by the experimental prototype with a CC output of 12 A and CV output of 56 V.
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