Short current control method for inductively coupled power transfer system

Abstract

In Inductively Coupled Power Transfer (TCPT) system, when system running in force resonant mode, there will exist dangerous short current between the resonant network and the switching network when switching frequency drifts away from inherent frequency of the resonant network. This paper proposes a short current control method to eliminate the short current by regulating the switching frequency to approach the inherent frequency. An instantaneous short current detection method and a mismatch error estimation method are proposed as well. The control method can be easily embedded in FPGA module to realize fast control. Experimental results verify the control method..