전기 자동차용 무선 충전 시스템 설계 및 충전 방식의 고조파 분석

Abstract

In this paper, hybrid control of rectifier/regulator of wireless power transfer system for electric vehicle has been studied. A combined rectifier/regulator was used for charging control. Hybrid control comprises integral cycle control and PWM control to cope with the variations of the induced voltage due to clearance and alignment. It has good control capability in itself not causing severe switching loss. A 22kW prototype of the WPT 4 (Wireless Power Transfer class 4) charging system as defined by the Society of Automotive Engineers(SAE) has been constructed and tested to verify the proposal. Harmonics from inverters and combined rectifier/regulator in systems using Hybrid Control were analyzed. And this paper introduces the 33[kW] system according to the increasing battery capacity of electric vehicles. The study of 33 [kW] can be said to be the starting point of the preceding study for subsequent vehicle wireless charging systems.