Design and Control of Cost Effective Wireless Power Transfer Systems of AC Motor Drives with Efficiency Maximization

Abstract

Abstract-Motor drives supplied through wireless power transfer (WPT) systems require a high frequency inverter in primary side, a rectifier and low frequency inverter in secondary side of the system. Due to this arrangement, reliability and efficiency are reduced whereas the cost and complexity of the system are increased. In this paper, a single inverter in the primary side drives an induction motor by removing rectifier and inverter and replacing it with AC/AC chopper in the secondary side. In this way, the desirable ac power can be injected into the motor effectively and also the WPT system efficiency is improved because of reduced power conversions. The performance of proposed wireless ac motor drive under a closed-loop V/f control system is verified by simulation using MATLAB/SIMULINK. KEYWORDS-AC/AC converters, electric vehicles, wirelessmotordrives, wireless powertransfer.