To make a coupling plate, which extends almost in parallel to a flat-plate-shaped wire-wound part to connect two flanges, thinner, by molding it into a body with a magnetic material, and bifilar-winding two coils.
A core 10 is so formed that a flat-plate-shaped wire-wound part 11, flanges 12 positioned on both ends of the wire-wound part 11 and a coupling plate 13 which extends in parallel to the wire-wound part 11 to connect two flanges 12 are molded with a magnetic material into a body. These two flanges 12 are provided with an electrode 14 extending from its bottom surface to side surface. Around the wire-wound part 11 of the core 10, two coils 20 are wound in a bundle, called bifilar-winding, while lined up so as no to overlap, and lead wires of each coil 20 is connected to difference electrodes 14 by welding, etc. By connecting two flanges 12 with the coupling plate 13 above the wire-wound part 11 extending in the horizontal direction, a closed magnetic circuit is formed. Making thinner is realized, and lining-up winding is easily performed since the wire-wound part of the core is flat-plate-shape, and balance of an inductance value of two coils is easy to obtain. And further a top surface thereof can be a wide and flat square shape.
SASAMORI KUNIO
ISONO KIYOSHI
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