Experimental Videos of Six Schemes for 400V And 800V WPT Systems

Most present wireless power transfer (WPT) systems are designed for 400-V EVs and its compatibility for a higher battery pack voltage is barely studied. To adapt for different WPT charging scenarios, this paper proposes a resonant inductor integrated-transformer (RIIT) based receiver. The design guideline, power losses, and power transfer capacity of the proposed system are presented. The proposed receiver is compact, low-cost, reliable, easy-to-implement, and compatible for WPT systems with different battery pack voltages without any significant change of system parameters. In addition, natural current sharing and voltage sharing can be achieved when using two RIITs in parallel or series. An LCC-LCC WPT prototype is built, and the system efficiency is 94.1% at 9.5 kW, which verifies the feasibility and performance of the proposed receiver.