Modeling and analysis of wireless electro-mechanical energy transfer and conversion using resonant inductive coupling

This paper presents a basic model of an electro-mechanical energy conversion system using the resonant inductive coupling as well as the power transfer system between the coils. The proposed system utilizes two sets of two-phase air-core coils both for the stator and the mover. There exists parasitic capacitance of the coils which is connected in series. Thus the whole system has certain resonant frequencies. Two-phase voltage source connected to the primary coils is driven at the resonant frequency. Unlike conventional wireless power transfer systems using resonant inductive coupling, the proposed system can generate moving flux field. The proposed system is similar to the induction machine but it is driven at very high resonant frequency and the slip ratio is also quite high. Tendency of the generated force of the mover obtained by the FEA simulation shows that can be explained by the model derived.