철도차량용 무선전력전송시스템의 지상 권선 방식에 따른 특성 비교 연구

Recently, wireless power transfer (WPT) technology has been applied to the home appliances such as mobile phones, electric toothbrush, LED TVs, and lightings, and even electric vehicles (EV) and railway transit. This paper presents the various ground winding methods of WPT for railway transit, and theoretical analysis of those methods. The single-phase ground winding method which has a simple structure and lowcost, and three-phase ground winding method which has high power density are introduced and the comparative analysis of the secondary pick-up induced voltages, rail induced voltages, and economic feasibility are conducted to draw the optimal WPT models for railway transit.