Performance Comparison of Inductive Charging Systems for Electric Buses

A comparative analysis of multi- coil transmitter inductive power system for electric buses is proposed in the paper. The goal of the analysis is to identify the behavior of aircore multi-coils transmitter in alignment and misalignment conditions that are often present in the considered application, comparing the results with the standard case of single coil transmitter. The analysis is carried out using analytical models for the wireless power system and finite element analysis to calculate the main electrical parameters necessary to identify the model. A case study is analyzed referring to a transmitter and a receiver with a square coil in order to evaluate the qualitative behavior of the system.