| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a current sensor with superior S/N ratio wherein detection errors due to external noise are avoided and with a large noise margin. SOLUTION: A core 1 constitutes an annular magnetic path comprising two counter magnetic legs 111 and 112. Detection coils 21 and 22 are wound around the magnetic legs 111 and 112, respectively. The detection coils 21 and 22, one ends 212 and 221 of which are of different pole side in polarity of induced voltages V1 and V2 caused by a magnetic fluxϕm going around in one direction, the annular magnetic, path, are connected to each other.</p> |
