A New Wireless Power Transfer Topology based on Quasi-Z-Source and LLC Resonant Network with Low Input Current THD

Wireless power transfer (WPT) systems are power electronic converters which can be installed under the road and charge the butteries of the electric vehicles. High total harmonic distortion (THD) of the input current is an important challenge in WPT system design. In this paper a new topology is proposed for WPT systems to reduce their input current THD. In the proposed topology, a quasi-Z-source inverter (QZSI) is used in series with a LLC resonant network. In addition to the DC voltage boosting, QZSI shapes the input current. The simulation results verify the performance of the proposed structure in THD reduction and power factor correction in comparison with the conventional Z-source resonant converter.