公开(公告)号：US12142949B2

公开(公告)日：2024-11-12

申请号：US17490150

申请日：2021-09-30

Applicant: HUAWEI DIGITAL POWER TECHNOLOGIES CO., LTD.

Inventor： Yuechao Li ,  Chao Yang

IPC: H01F27/28 ,  H01F27/36 ,  H01F38/14 ,  H02J50/00 ,  H02J50/10 ,  H02J50/70

Abstract: A shielding film includes a first film layer. The first film layer includes a first conductive part and a first insulating part, and the first insulating part penetrates the first conductive part in a thickness direction of the first film layer. Under electromagnetic influence of a first electromagnetic field, a first eddy current is formed in the first film layer, and a loop of the first eddy current is located in the first conductive part, so that the first eddy current has relatively high current intensity. Under electromagnetic influence of a second electromagnetic field, a second eddy current is formed in the first film layer, and a loop of the second eddy current passes through the first insulating part, so that current intensity of the second eddy current can be reduced.