Lowest-In First-Service System for the Efficient MPT (Microwave Power Transfer) to Multiple Receivers

In this paper, a new lowest-in first-service system is proposed for the efficient MPT (Microwave Power Transfer) to multiple receivers. Basically, the power transmitter of the conventional MPT system for the multiple receivers provides the wireless power to a receiver in the power request sequence order, which can be consider as the first-in first-service method. From the aspect of overall power management and control of wireless power transfer system, this has critically serious problem to the receivers with very low battery power level because of the too long waiting or delay time to them. This drawback can be overcome by the proposed system. Using the power receiver identification (ID) and battery state information (BSI), the proposed system transmits the wireless power to the receiver of the lowest battery power. In this paper, to evaluate the performance of the proposed system, the total workload of the receivers is evaluated by applying each of the proposed system and the conventional system. Through the simulation results, it is confirmed that the proposed MPT system can provide a power efficient environment in which each receiver can perform work more effectively than the conventional MPT system in various receiver conditions.