Abstract
This paper proposes an inductive power transfer (IPT) system with three-bridge switching compensation topology. With the proposed IPT topology, the equivalent circuit and the resonant condition are analyzed to achieve the load-independent constant current (CC) and load-independent constant voltage (CV) outputs. On this basis, multiple power levels can be achieved under CC/CV conditions by bridge arm switching, which makes it possible to complete charging tasks for multiple power level electric vehicles (EV) without switching the IPT system. A circuit simulation was built to verify the different power level switching effects of the structure. A 3.3 kW IPT system was designed to verify the proposed structure. At the rated output power, the experimental efficiency was up to 92.04% and 91.21% in CC and CV output modes, respectively.
Highlights
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CV Mode 22..33..CCTVVhMeMeooqddeueivalent circuit of CV mode in IPT system is shown in Figures 6 and 7
Combining the theoretical analysis of the above-two transmission modes, it could be known that the three-bridge inverter structure could realize the conversion from constant current (CC) mode to CV mode by switching the working bridge arm under the fixed-frequency
Summary
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