A MIMR WPT System with An Output of 3.3 kW - 20 kW

Due to the range of battery capacities in different electric vehicles (EVs), wireless power transfer (WPT) systems need to have a large variation in the output power. Since conventional systems are usually designed for a custom specification, the power and efficiency may be significantly reduced due to the need for interoperability between ground assembly and vehicle assembly with different power ratings. To address this issue this paper proposes a DC-link parallel AC-link series (DPAS) multi-inverter multi-rectifier (MIMR) architecture for high-power WPT systems. Modulation, power transfer capability, and power sharing from the design aspects are investigated. A detailed power loss analysis and a simplified maximum efficiency point tracking (MEPT) method based on mutual inductance identification are presented. This vedio demonstrates the results from a 20-kW LCC-LCC WPT system which validates the analysis and proposed system operation.