Theoretical and Experimental Study on Electromagnetic Shielding Structure Design of Electric Vehicle Wireless Charging System
In order to study the influence of shielding structure on electvical vehicles wireless charging system,based on the theory of shielding effectiveness,this paper establishes a relationship model between the thickness of the shielding material and its parameters.Firstly,the shielding effectiveness of single-layer shielding materials with different thicknesses and different shielding materials on the magnetic field is analyzed,and the numerical solutions are compared with the analytical solutions to preliminarily validate the accuracy of the established shielding material thickness model.Based on this,a composite wireless charging shielding structure with the minimum thickness is proposed under the premise of ensuring electromagnetic safety and verified by electromagnetic tests.The results show that when a combination of 0.05 mm ultra-thin silicon steel and 2.52 mm ferrite is used as a dual-layer shielding,the magnetic field intensity reaches the safety limit,and the transmission efficiency reaches 90.92％.Compared with the traditional ferrite and aluminum composite shielding structure,the thickness of the shielding structure is reduced by 1.95 mm.
Electric vehiclesWireless chargingElectromagnetic shieldingShield thicknessTheory on design
万方数据
维普
