Features of a Wall With Open-Type Magnetic Shielding Method

In this paper, magnetic shielding of electric wires by a wall of magnetic material is considered. It has been commonly believed over 100 years that magnetic materials should be arranged without any space between them to achieve a sufficient magnetic shielding effect. However, it was newly found that a wall made by aligned strips with gaps could achieve almost the same effect of magnetic shielding as a wall with the aforementioned conventional method, which is a complete plate without any gap. In this paper, this new method using aligned strips with gaps is called open-type magnetic shielding method. Furthermore, it was found that sufficient magnetic shielding effect can be achieved with sizable gaps. Therefore, the advantage that light and air can pass through the wall with open-type magnetic shielding method will create a wide range of applications. This study reports the features of a wall with the open-type magnetic shielding method with some experimental data about interval between strips, layers, rotation of strips, and so on.