Abstract
Wireless Power Transfer (WPT) has gained huge popularity in the field of Electrical Vehicle (EV) charging. This is, due to its huge scope and capability to eliminate the limitations like limited capacity, high cost, and fear of range anxiety in plugged-in electrical vehicles. This paper proposes a method of controlling the dc-link voltage of a three phase primary active bridge rectifier in a resonant WPT system. This model is able to achieve high tolerance to the fluctuations in the grid supply voltage, constant dc voltage at the primary rectifier output, unity power factor on grid supply, less Total Harmonic Distortion (THD) in the supply current and high power transfer efficiency to the Electrical Vehicle (EV) battery. Moreover, the coils and the compensation elements in WPT are designed to operate at resonance such that the voltage and current on the primary side as well as on secondary side are in-phase with each other. The resonance frequency is selected as 85 KHz as per Society of Automotive Engineers (SAE) standards. A detailed observation of the proposed system response to the grid side disturbances has been done. The proposed method has been simulated in the MATLAB-SIMULINK software and required waveforms have been shown to validate it.
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