coil for detection of electrical current and method for detection of electrical current

摘要

PURPOSE: To provide a current detection coil capable of easily realizing a smaller size, lighter weight and lower cost and providing a precise current detection signal while facilitating the mounting. CONSTITUTION: In this current detection coil 10, one-side ends (right ends) of the i-th first and second thin film conductors 12(i) and 14(i) obliquely opposed to each other with a board 16 consisting of an insulating member between are mutually electrically connected through the i-th through-hole 20(i) of the right line, whereby the i-th coil single body Ci for one winding is formed, the other ends (left ends) of the second thin film conductor 14(i) and the first thin film conductor 12(i+1) are mutually electrically connected through the (i+1)-th through-hole 18(i+1) between the mutually adjacent i-th coil single body Ci and (I+1)-th coil single body Ci+1, whereby both the coil single bodies Ci and Ci+1 are serially connected, and coils £C1-Cn| of n-windings are constituted as the whole of the current detection coil 10. A transparent insulating film (not shown), for example, is put over the surface of the board 16 so as to cover all the first and second thin film conductors 12 and 14.