Multiple-Receiver Wireless Power Transfer with Efficient Power Control Strategy

Abstract

Because the target power levels and impedance matching conditions are mostly not satisfied, it is difficult for Multiple-receiver wireless power transfer system (MRWPT) systems to provide target power and maximal efficiency simultaneously. Therefore, a power control strategy is developed in MRWPT system to balance supporting multiple target power levels and operating under high efficiency. As an example, a 100-kHz two-receiver wireless power transfer (WPT) system and establishes a control strategy for enabling the system to achieve target output power levels with high efficiency; At last, the proposed MRWPT system is proved to obtain an efficiency of more than 89.1 % and provide the target output power.