Hybrid Wireless Power Transfer

Both magnetic field and electric field can be used for transferring power wirelessly. But the up-to-date researches on wireless power transfer have been either inductive power transfer (magnetic field) or capacitive power transfer (electric field). An improved power transfer mode called hybrid wireless power transfer (HWPT) is proposed and evaluated in this paper. Power is transferred from primary side to secondary side through magnetic field and electric field at the same time with a single DC power supply and inverter. Theoretical modeling and derivation are carried out to validate the feasibility of the proposed power transfer mode. A comparison between HWPT, inductive power transfer (IPT) and capacitive power transfer (CPT) is presented. The advantages and disadvantages of the proposed wireless power transfer form are studied.