Contactless EV Power Track System with Segment-Excited Inductively Coupled Structure

This paper is aimed to utilize the technology of contactless power transmission to design and implement contactless electric vehicle power track system with segment-excited inductively coupled structure array. To increase the tolerances of lateral and longitudinal displacement that between vehicle and the track, the simulation software have analyzed the track coil of magnetic field and selected the spiral structure with a uniform magnetic field distribution. The size of pickup coil has also been determined to let the system receive power efficiently. The overall track consists of pad arrays. For reducing power loss caused by turning on the track power simultaneously, the segment-excited control has been set up in the system. Based on the experimental results, the maximum output power of system is 910.6 W and the highest efficiency is 75% with 160 V input dc supply voltage and load resistance 80.7 Ω under 12 cm air-gap.