A steady-state analysis of bi-directional inductive power transfer systems

The modeling and analysis of bi-directional inductive power transfer (BD-IPT) systems are relatively complicated as they consist of high order resonant circuits, which are complex in nature and sensitive to variations in system parameters and control variables. Consequently, an accurate model that can predict the behavior of BD-IPT systems under different operating conditions has not been reported to-date. This paper therefore proposes a mathematical model through which the steady-state behavior of BD-IPT systems can be accurately characterized. The proposed mathematical model is comprehensive as it accounts for the effects of harmonics and sensitivity to variations in system parameters and control variables. The validity of the proposed model, which is verified using the simulated results of a 7.5 kW system, provides a clear insight into the operation of BDIPT systems and is expected to be useful at both design and optimizations stages.