Magnetic shielding for electromagnetic fields within certain frequency range, has multiple stacked layers, where one layer is made of non-grain-oriented ferromagnetic material

摘要

The magnetic shielding (1) has multiple stacked layers (2,3,4), where one layer is made of a non-grain-oriented ferromagnetic material. The other layers are made of aluminum, which are constructed together by welded plates (5,6,7). The ferromagnetic material is a non-grain oriented silicon-iron alloy or a non-grain oriented nickel-iron alloy.