Design of Multi-Receiver IPT System for Electric Vehicles Considering Transfer Efficiency and Different Power Requirements

Inductive power transfer (IPT) system is a reasonable power supply option for electric vehicles (EVs), especially the multi-receiver IPT system showing potential in the charge-while-drive scenario. From the circuit analysis, it can be seen difficult to analytically get the solution that reach both different power requirements in receivers and optimal system transfer efficiency. This study demonstrates an optimization-based design method of the single-transmitter coupled multi-receiver (S-M) wireless charger for EVs, considering the optimization of system transfer efficiency under power requirements that can be different in each receiver. A two-level mathematical optimization model is constructed to deal with the complex interacting relationships, in which different power requirements are restricted specifically in subsystem levels. The inconsistency of subsystems is coordinated and optimal system efficiency is realized in the system level. Take the dual-receiver system as an example, an optimized feasible solution is reached and can be quickly updated when power requirements changed. Finally, the optimization-based design method has been validated by both simulation model and constructed prototype.