DRUM CORE, DRUM-TYPE RECTANGULAR CORE AND VARIABLE TYPE LINEARITY CHOCK COIL USING THEM, VARIABLE TYPE LINEARITY CHOKE COIL WITH BASE, AND RECTANGULAR TRANSFORMER

摘要

PROBLEM TO BE SOLVED: To provide a small-sized variable type linearity choke coil, having a simple structure which is easy to assemble. ;SOLUTION: A drum core main body 15, where guide trenches 14 are formed on outer surfaces of a pair of flange parts 12 arranged on both ends of a coil winding part 10, is used. A first winding 17 is wound around the coil winding part, and a second winding 18 is wound along both the guide trenches 14 formed on both of the flange parts. Since the directions of magnetic fields generated by making current flow to both of the windings intersect orthogonally, a first winding is made a winding for a chock coil, and a second winding is made into a control winding. Thereby a variable type linearity choke coil can be constituted.;COPYRIGHT: (C)2001,JPO