Load Power Agnostic 6.6 kW Wireless EV Charger with LCL Tuned Primary and Secondary Side Regulation

Conference · Wed Nov 01 00:00:00 EDT 2017 · IEEE Energy Conversion Congress and Exposition (ECCE)

DOI:https://doi.org/10.1109/ECCE.2017.8096822· OSTI ID:1414709

Galigekere, Veda Prakash N.  ^[1]; Onar, Omer C.  ^[1]; Chinthavali, Madhu Sudhan  ^[1]; Wang, Zhiqiang  ^[1]

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1. ORNL

Wireless charging of electric vehicles (EVs) is going to play a major role in electrification of transportation. This paper proposes to utilize an LCL tuned primary and series tuned secondary with a secondary buck regulator to achieve power transfer control by secondary side control only. Analytical expressions for base (primary) coil current and transformer turns ratio N required to transfer the required power at a certain input voltage is calculated for a given coil set. The required parameters are calculated for a 6.6 kW wireless charging system with a matched circular coil set. The proposed control scheme and analysis were validated through Saber Sketch simulations and by a 6.6 kW laboratory prototype. Experimental results for different load power settings at voltages of 290 V, 340 V, and 370 V are presented.

• Research Organization: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)
• Sponsoring Organization: USDOE
• DOE Contract Number: AC05-00OR22725
• OSTI ID: 1414709
• Journal Information: IEEE Energy Conversion Congress and Exposition (ECCE), Vol. 2017; Conference: IEEE Energy Conversion Congress and Exposition, Cincinnati, Ohio (United States), 1-5 Oct 2017; ISSN 2329-3721
• Publisher: IEEE
• Country of Publication: United States
• Language: English