Magnetic Modeling of a High-Power Three Phase Bi-Directional IPT System

The demand for high power and bi-directional Inductive Power Transfer (IPT) systems is on the rise due mainly to applications such as electric vehicles (EVs) and vehicle-to-grid (V2G) systems. Three phase bi-directional IPT systems can be considered as a viable option for high power applications as they are more efficient especially at elevated power levels due to lower track currents and lower DC ripple currents in comparison to single-phase bi-directional IPT systems. This paper proposes a new IPT system that adopts a three-phase magnetic circuit for both primary and secondary sides of the system. Analyses related to design of the magnetic circuit for a 10 kW system are presented and validated by 3D simulations using JMAG Studio 10.0 (TM) for four different magnetic circuit configurations. Based on the results, the most effective design is used for further simulations in MATLAB Simulink environment to show that the proposed three-phase IPT system is capable of delivering 10 kW as per design specifications.