Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 30, Issue 11, Pages 6011-6014Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2015.2446891
Keywords
Capacitive power transfer; electric vehicle charging; LCLC compensation
Categories
Funding
- US Department of Energy Graduate Automotive Technology Education Grant
- US-China Clean Energy Research Center-Clean Vehicle Consortium
- DENSO International
- University of Michigan-Dearborn
- University of Michigan-Ann Arbor
- China Scholarship Council
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A double-sided LCLC-compensated capacitive power transfer (CPT) system is proposed for the electric vehicle charging application. Two pairs of metal plates are utilized to form two coupling capacitors to transfer power wirelessly. The LCLC-compensated structure can dramatically reduce the voltage stress on the coupling capacitors and maintain unity power factor at both the input and output. A 2.4-kW CPT system is designed with four 610-mm x 610-mm copper plates and an air gap distance of 150 mm. The experimental prototype reaches a dc-dc efficiency of 90.8% at 2.4-kW output power. At 300-mm misalignment case, the output power drops to 2.1 kW with 90.7% efficiency. With a 300-mm air gap distance, the output power drops to 1.6 kW with 89.1% efficiency.
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