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Inductive Power Transfer power supplies for electric vehicles (EV) charging in dynamic applications need to tolerate large variations in coupling and tuning with varying loads. This paper investigates the use of a buck converter to regulate the input voltage to a fixed frequency unidirectional switch push-pull converter to meet the requirements of dynamic charging. The presented circuit is optimised...
Intermediate couplers have been shown to increase the coupling from primary to secondary pads in inductive power transfer (IPT) systems. This paper investigates embedding a co-planar intermediate coupler coil, with the primary coil inside the primary pad, to boost coupling to the secondary pad given there have been recent works indicating this will have similar benefits. Several coil designs are simulated...
This paper proposes a double coupled inductive system for multi-pickup systems which is intended for wireless charging of a fleet of electric bicycles. An intermediary coupler is introduced between the primary and pickup and operates as a switch, with the intention of turning on when the bicycle is present and turning off when the bicycle is absent to prevent magnetic fields from radiating into the...
This paper investigates the impact of coupling variations in an IPT lumped coil system on the overall system behaviour. An analysis of the reactive power flow between the pick-up and the primary power supply in a variable coupling system is presented. A 1.2kW battery charging system design example was conducted on how to design the resonant networks to minimize the burden on the primary power supply...
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