Mobile QR Code QR CODE : The Korean Institute of Power Electronics
Title Zero-Phase Angle Frequency Tracking Control of Wireless Power Transfer System for Electric Vehicles using Characteristics of LCCL-S Topology
Authors Jongeun Byun ; Byoung-Kuk Lee
DOI 10.6113/TKPE.2020.25.5.404
Page pp.404-411
ISSN 1229-2214
Keywords Wireless power transfer system; Electric vehicle; Zero-phase angle; Frequency tracking control
Abstract Inductive power transfer (IPT) systems for electric vehicles generally require zero phase angle (ZPA) frequency tracking control to achieve high efficiency. Current sensors are used for ZPA frequency tracking control. However, the use of current sensors causes several problems, such as switching noise, degrading control performance, and control complexity. To solve these problems, this study proposes ZPA frequency tracking control without current sensors. Such control enables ZPA frequency tracking without real-time control and achieves stable zero voltage switching operation closed to ZPA frequency within all coupling coefficient and load ranges. The validity of the proposed control algorithm is verified on LCCL-S topology with a 3.3 kW rating IPT experimental test bed. Simulation verification is also performed.