无线电能充电系统中纳米晶复合屏蔽结构的屏蔽性能

Aiming at the magnetic leakage of shielding back space of electric vehicle wireless charging system, a new nanocrystalline composite shielding structure with thickened edge is proposed. By establishing the mathematical model of multi-layer composite shielding, the spatial magnetic flux density at the back of different shielding structures is simulated and analyzed. The results show that the edge thickened nanocrystalline composite shielding structure has a good inhibitory effect on the magnetic leakage field behind the shielding. Compared with the single-layer nanocrystalline composite shielding, the magnetic flux density is reduced by 25%-26.1%, compared with the ferrite + aluminum plate structure, the magnetic flux density is reduced by 50%-55.7%,and the shielding efficiency of the shielding structure is 22.9%-26.7%, which effectively reduces the magnetic leakage of the shielding.