Abstract

International audience; The present paper focuses on wireless energy transfer mechanisms applied to urban electric vehicles. It describes the using conditions of a particular transformer without ferromagnetic core, supplied by a resonant inverter and loaded by mobile sources (catenaries with magnetic induction to power electric vehicles). The system consists of unconventional transformers with large air-gaps and a generator who supplies the transformer. The paper describes the theoretical model used for the numerical simulation (magnetic circuit, power converter, loads), and the measurements provided by our experimental platform (Tesla lab.). The transformer is supplied by a half-bridge series resonant converter. The transformer secondary coil is mobile compared to the primary, which is fixed on the road. This system is found in many industrial applications such as light automatic vehicles, tramways, etc. In this work we will show that the performance of a transformer without magnetic circuit can be equivalent to a standard transformer.

Abstract

The aim in this paper is to evaluate the economic viability of electric vehicles that are supplemented by electric roads (eRoads), instead of using conventional diesel, petrol, and battery electric vehicles (BEVs). The battery is the most expensive component of an electric vehicle, so the premise of this paper is to reduce the size of the battery, and thereby significantly reduce the cost, by installing a series of electric roads for long-distance journeys. Denmark is used here as case study to ensure the assumptions reflect a real-world case when comparing petrol, diesel, BEVs, and eRoads. The results suggest that eRoads are a cheaper method of electrifying road transport than BEVs, which is an important finding, since electrification is widely believed to be the cheapest method for decarbonising the transport sector in the coming decades. Furthermore, if fuel and vehicle prices evolve as predicted between now and 2050, then eRoads are also a cheaper form of road transport than diesel and petrol, primarily due to increasing oil prices and decreasing battery costs. By implementing eRoads, it is also possible to electrify heavy-duty transport such as buses and trucks, which results in even more energy savings and reductions in carbon dioxide emissions. Keywords: eRoad, Sustainable transport, Electric car, Electric vehicle, Electric road