Analysis of power converters for high frequency resonant inductive electric vehicle charging system

The concern for the supporting power converters is unavoidable in the development of inductive power charging system technology for electric vehicle application. In both the primary and secondary sides, power converters are needed to both generate and harvest the high frequency AC power which is transferred wirelessly in a resonant frequency. In his paper, we develop the power converters that are suitable for a given resonant circuit with a series-parallel compensating topology and a given operating frequency of 50,752 Hz. In the primary circuit, the need of high frequency switching requires the soft switching states for achieving better efficiency. AC-AC converter with DC link and direct AC-AC converter will be simulated, analysed and compared. In the secondary side, the high frequency power will be rectified and injected into the battery. The power converters are simulated,, modelled and analysed by using Simulink^®. At the end of the project, the AC-AC converter with DC link is proposed for the primary circuit whereas full-bridge rectifier, Buck converter and Buck-Boost converter are combined and proposed for the secondary circuit. The AC-DC converter operates with two-steps charging scheme, comprising a hysteresis current control and a duty cycle-based voltage control.