Modeling and Centralized-ZVS Control for Wireless Charging Electric Vehicles Supplied by Parallel Modular Multi-Inverters

In this paper, a parallel modular multi-inverter (PMMI) topology is proposed to supply high power for wireless charging electric vehicles (EVs). A major challenge in the implementation of PMMI zero-voltage switching (ZVS) all inverters avoid high-frequency losses. Therefore, centralized-ZVS control and master–slave frequency following (MSFF) strategy are presented realize ZVS PMMIs by single controller structure without extra controllers needed on slave inverters. Meanwhile, modeling method directly related angle operating an arbitrary number linearized analyze system dynamic characteristics at point. Additionally, obtain desired performance, optimal coefficient (OCC) configuration design parameters. Finally, laboratory transfer (WPT) prototype supplied three designed, built, tested verify correctness theoretical analysis. Experimental results show that can maintain preset value with settling time under designed PI The measured whole transmission efficiency 94.1% 10 Ω load.