Clarifying the Relationship between Maximum Power Transfer Capacity and System Efficiency Conditions of Wireless Power Transfer System

Power transfer capacity and system efficiency are two key important performance indexes of Wireless Power Transfer (WPT) system. To determine system optimum performance, it's important to find relationship between maximum power and efficiency. In terms of coupling coefficient and quality factor, this paper presents maximum power and maximum efficiency condition and gives the relationship between the condition. Furthermore, it clarifies maximum power below than 50% problem.