Battery Charging System for PHEV and EV using Single Phase AC/DC PWM Buck Converter Jung-Hyo Lee*, Doo-Yong Jung*, Sang-HoonPark**, Taek-Kie Lee***, Young-Ryul Kim§ and Chung-Yuen Won

1. Introduction
There has been active research to develop environmentally friendly products due to the recent increase in the oil prices and the reinforcement of strict environmental regulations worldwide. In particular, in order to develop environmentally friendly vehicles, there is active research in the automotive industry, which utilizes an immense amount of oil resources, on the drive system using electric motors and power-conversion systems that may potentially replace the conventional internal combustion engine [1, 2]. PHEV(Plug-in Hybrid Electric Vehicle), NEV(Neighborhood Electric Vehicle) and the general EV(Electric Vehicle) are examples of the new ecological vehicles. Such vehicles use electricity as its auxiliary and main power source, and battery is used as the energy source to drive their electric motors.
 Journal of Electrical Engineering & Technology Vol. 7, No. 5, pp. 736~744, 2012
http://dx.doi.org/10.5370/JEET.2012.7.5.736
 Corresponding Author: Dept. of Electrical Engineering, Sungkyunkwan
Univerity, Korea. (woncy@skku.edu)
* Dept. of Electrical Engineering, Sungkyunkwan Univerity, Korea.
(daumin@naver.com)

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