| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To provide a current sensor which resolves a problem that once a magnetic material become magnetized, residual flux is maintained even after disappearance of magnetic field in the case of focusing a magnetic field generating around a current path by using a magnetic material and lowering of accuracy caused due to the residual flux of the magnetic material does not occur. <P>SOLUTION: The current sensor is constituted by attaching a Hall element 8 as a magnetism sensing element and an electronic circuit substrate 7 to a case 9 and fixing it to a current path with attaching screws 11 without having no magnetic material. Lowering of accuracy due to residual flux of the magnetic material is prevented by the method detecting the magnetic field directly with the magnetism sensing element without using a magnetic material focusing magnetic field generating around the current path. <P>COPYRIGHT: (C)2006,JPO&NCIPI</p> |
