| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve accuracy in current detection without raising the cost. <P>SOLUTION: A core 1 in which an air gap for arranging a magnetic sensor 4 is formed is overall made of a high magnetic permeability material of metal, such as an Fe-Ni alloy. By layering four relatively thin plates 1b-1e, made of a magnetic material into a pasted state on each side of a relatively thick plate 1a, made of a magnetic material located at a center part, the core 1 is formed into such a shape that its effective cross-sectional area is gradually increased toward a part on the opposite side to the air gap 2. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
