A multi-output capacitive charger for electric vehicles

摘要

Multi-output converters are widely used in various electronic devices and Electric Vehicles (EVs) due to their benefit in terms of cost, efficiency and space for installation. On the other hand, Wireless Power Transfer (WPT) methods including Inductive Power Transfer (IPT) and Capacitive Power Transfer (CPT) have been applied increasingly in EVs since they are more convenient and safe as compared to conventional conductive chargers. Due to replacing copper wires and permeable materials of inductive coupling method with cheap metal plates, implementing a CPT system is more cost effective and structurally simple system as compared to IPT. However, researches on multi-output chargers relating to CPT are rarely presented. This paper proposes a new concept for a multi-output charger system by adopting CPT for EVs application. The proposed system can charge independently several batteries of EVs at one time by adopting only one full bridge inverter at the primary side. The mathematical analysis supported by simulation results are presented.