Multi-Pad Receivers for High Power Dynamic Wireless Power Transfer

Inductive dynamic wireless power transfer (DWPT) refers to the technology that allows electric vehicles to recharge while in motion. Practical roadway DWPT systems need to charge different vehicle classes having a wide range of power requirements. This leads to possible over-design of the primary and secondary pads. The use of multi-pad receivers can help in scaling the receiver side system based on the power requirement. This paper presents the design of a 30 kW multi-pad wireless power receiver system and experimental results showing dynamic wireless charging on a light-duty electric vehicle using three WPT3 J2954 secondary pads which are rated for 11.1 kVA each.