Effective Circuit Configuration and Control for Coil-Array Wireless Power Transmitters

This article presents a circuit configuration and control for coil-array wireless power transmitters. The target coil arrays have coils that are uniform in shape dimensions regularly arranged with an angular interval of 120°. system has three-leg half-bridge inverter, which simultaneously feeds the three transmitter. It can deal more than by adding switch set between inverter coils. to cancel mutual inductances transmitter improve factor system. maximize efficiency from receiver output regardless position. current condition achieving these features is derived, field-programmable-gate-array-based realizing presented. performance proposed experimentally validated implemented prototype. Results show variation less 5.8% depending on operate at approximately maximum efficiency.