Title :
Contactless charging for electric vehicles with a large air gap
Author :
Ho, Terry Chi Young ; Gomersall, B. ; Li Ran
Author_Institution :
Sch. of Eng. & Comput. Sci., Durham Univ., Durham, UK
fDate :
Aug. 30 2011-Sept. 1 2011
Abstract :
An induction coupler with 100 mm wide air gap is being developed for contactless charging of electric vehicles with power levels up to 3 kW. This will enable convenient opportunity charging at stops and maximise battery life and mileage. A core was found to be necessary, and using an iterative method, the core design was optimised for optimum coupling was found for the 100 mm air gap. High frequency operation is necessary to reduce the size of compensating capacitors and the thickness and weight of the core, but is limited by the eddy current and the switching losses. An experiment was carried out to compare measurement and software modelling results. A charging characteristic was found by simulation and a frequency control strategy is proposed.
Keywords :
air gaps; battery powered vehicles; eddy currents; frequency control; inductive power transmission; iterative methods; battery life; capacitors; contactless charging; eddy current; electric vehicles; frequency control strategy; induction coupler; iterative method; large air gap; mileage; optimum coupling; size 100 mm; software modelling; switching losses; Coils; Couplers; Couplings; Inductance; Inductance measurement; Integrated circuit modeling; Magnetic cores; Automotive application; Contactless Energy Transfer; Contactless Power Supply; Flux model;
Conference_Titel :
Power Electronics and Applications (EPE 2011), Proceedings of the 2011-14th European Conference on
Conference_Location :
Birmingham
Print_ISBN :
978-1-61284-167-0
Electronic_ISBN :
978-90-75815-15-3
