Design and Stray Field Evaluation of Inductive Power Transfer in Electric Vehicle Charging
Paper in proceedings, 2019

The influence of magnetic stray fields in the vicinity of a vehicle is a concern when inductive power transfer (IPT) is used for wireless charging for electric vehicles. To accurately evaluate the stray fields, the design of the coils and the chassis configuration should be considered. In this paper the analysis and design of a series-series compensated 3.3 kW IPT charger is presented. A prototype of the charger is constructed and mounted on a plug-in hybrid electric vehicle. The stray fields are measured at rated power and compared with finite element analysis simulations. The simulated and measured magnetic flux density are in good agreement. The highest measured magnetic flux density is 1.67 μT at the left tire with the ground assembly misaligned by 100 mm. It is only 6.2 % of the flux density allowed for the general public in the ICNIRP standard. It is concluded that for low power IPT chargers, the requirement on leakage flux density is easily fulfilled.

magnetic shielding

electric vehicle charging

inductive power transfer

magnetic flux density measurements

leakage fields

Author

Daniel Pehrman

Chalmers, Electrical Engineering, Electric Power Engineering, Electrical Machines and Power Electronics

Yujing Liu

Chalmers, Electrical Engineering, Electric Power Engineering, Electrical Machines and Power Electronics

2019 Fourteenth International Conference on Ecological Vehicles and Renewable Energies (EVER)

14th International Conference on Ecological Vehicles and Renewable Energies (EVER)
Monte Carlo, Monaco,

Modular inductive power transfer (IPT) for high power vehicle charging

Swedish Energy Agency, 2018-11-01 -- 2021-06-30.

SWC Skalbar sladdlös laddning

Swedish Energy Agency, 2015-03-01 -- 2018-02-28.

Driving Forces

Sustainable development

Areas of Advance

Transport

Energy

Subject Categories

Electrical Engineering, Electronic Engineering, Information Engineering

DOI

10.1109/EVER.2019.8813625

ISBN

9781728137032

More information

Latest update

3/10/2020