2021 Volume 77 Issue 1 Pages 21-27
Dynamic wireless power transfer has been proposed to solve the issue of performance problem of electric vehicles, which is a short cruising range. There is the eddy current loss in the conductors which is in the magnetic field by wireless power transfer system. Since road structures contain conductors such as metals, the effects of road structures on the power supply efficiency were verified by actual measurement. The results show that the surface and base materials do not affect the proposed dynamic wireless power transfer system. However the reinforcing steel in the structure reduces the efficiency by 4.8%. The magnetic shield made of aluminum reduces the influence of the steel bars by half, while the use of the shield reduces the efficiency by 0.4% in the case of the granularity-adjusted crushed stone in the roadbed.
