A bi-directional inductive power transfer system with individually controlled tracks and pick-ups

Abstract

Bi-directional inductive power transfer (BDIPT) technique is attractive for applications, such as electric vehicles (EVs), for the realization of vehicle-to-grid (V2G) systems. This paper presents a circuit topology to individually control magnitude and direction of power flow from grid to multiple EVs. The proposed system employs two inductor-capacitor-inductor (LCL) parallel resonant circuits together with a segmented switching converter and two pick-ups, to facilitate individual control of power flow. A mathematical model is presented, showing the individual controllability of bi-directional power flow between the tracks and the pick-ups. Validity of the proposed concept is demonstrated through simulation results of a 1.5 kW IPT system. Results indicate that the proposed topology is feasible, and ideal for applications where bi-directional power flow needs to be controlled individually within `N' numbers of tracks and pick-ups.