| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To accurately measure current flowing through a measuring object without using a joining state inspecting coil. <P>SOLUTION: The current measuring device includes: a fixing-side sensor 11 that is provided with one core 23a of cores 23a and 23b forming an annular structure wherein the cores 23a and 23b each keep one end and the other end joined with each other respectively and winding 24a formed therearound; a movable side sensor 12 that is provided with the other core 23b and winding 24b formed therearound and wherein each of the cores 23a and 23b is made annular when it is joined and clamped with the sensor 11; a spring for energizing the sensor 12 in the joining direction; a measuring section 34 that measures a current value Di of current I on the basis of voltage V1 generating in the respective windings 24a and 24b resulted from current I flowing through conductor 100 surrounded by the cores 23a and 23b in the clamping state; and an excitation section 37 that supplies excitation voltage V2 wherein the cores 23a and 23b each keep one end differently polar and other ends thereof are also made to have different poles, to the windings 24a and 24b. <P>COPYRIGHT: (C)2011,JPO&INPIT</p> |
