Evaluation of maximum system efficiency and maximum output power in two-coil wireless power transfer system by using modeling and experimental results

摘要

Maximum output power and maximum system efficiency are the two important design factors in a wireless power transfer (WPT) system. This paper reviews the model used for evaluation of maximum output power and maximum system efficiency in a two-coil WPT system under different distances (DIS), different operation frequencies as well as different load conditions. By obtaining theoretical relationships of output power and system efficiency, a designer is able to select design parameters for WPT system optimization. A proof of experimental prototype is built in the laboratory to evaluate the system efficiency and output power. It is shown that the measured results closely agree with the theoretical results under different operating conditions.