| 摘要 |
<p><P>PROBLEM TO BE SOLVED: To improve a balance of sensitivity of current detection, and to reduce a manufacturing cost. <P>SOLUTION: The current sensor is equipped with a coil portion body 3 in which a conductor 12 is wound around a winding core 11; and a single compensation coil portion 4 in which a conductor 22 is wound around a winding core 21, attached to one end portion P3a of the coil portion body 3 at a base end portion P4a, and connecting the conductor 22 to the conductor 12. While the coil portion body 3 is elastically deformed to make a tip end portion P4b on the opposite side to the base end portion P4a in the compensation coil portion 4 and the other end portion P3b of the coil portion body 3 come close to each other to form a ring-shaped current detecting annular portion, the length L2 between the one end portion P3a side of a winding portion 3c at which the conductor 12 in the coil body 3 is wound and the base end portion P4a side of a winding portion 4c at which the conductor 22 in the compensation coil portion 4 is equal to the length L3 between the other end portion P3b side of the winding portion 3c and the tip end portion P4b side of the winding portion 4c. <P>COPYRIGHT: (C)2012,JPO&INPIT</p> |
