| 摘要 |
<p>PURPOSE: To provide a relatively low-cost method for accurately measuring a triangular wave superposed on a large AC current particularly without necessity of an insulating circuit. CONSTITUTION: A ring core 12 is linked to a lead 11 in which a triangular wave is superposed on a large AC current and a measured current flows, and an AC detecting coil 13 and a feedback coil 14 are wound on the core 12. Both the coils are so wound in the direction as to cancel the AC magnetic fluxes to each other, a triangular detecting coil 15 is further wound on the core 12, and only the triangular wave component is detected by the coil 15.</p> |
