Common mode filter
AssigneeTDK Corporation
InventorsToshio TOMONARI, Tsutomu KOBAYASHI, Kazunori ARIMITSU
Life of this patent
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Abstract
Disclosed herein is a common mode filter that comprises a drum core including a winding core portion and a pair of flange portions provided at both ends of the winding core portion, and first and second wires wound around the winding core portion so as to form a pair-wire for each turn. The first and second wires includes one or a plurality of sparsely-wound portions in which the first and second wires are wound with adjacent pair-wires spaced from each other, and one or a plurality of closely-wound portions in which the first and second wires are wound with adjacent pair-wires in close contact with each other.
Claims6
A common mode filter comprising:
- a winding core portion;
- a first flange portion provided at one end of the winding core portion in an axis direction of the winding core portion;
- a second flange portion provided at other end of the winding core portion in the axis direction;
- and
- first and second wires wound around the winding core portion,
- wherein the first and second wires include first and second closely-wound sections in which the first and second wires are closely wound over a plurality of turns, and a predetermined turn arranged between the first and second closely-wound sections,
- wherein the predetermined turn has a section in contact with neither the first nor second closely-wound sections,
- wherein each turn of the first wire in the first closely-wound section is closer to the first flange portion than an associated turn of the second wire in the first closely-wound section, and
- wherein each turn of the first wire in the second closely-wound section is closer to the second flange portion than an associated turn of the second wire in the second closely-wound section.
Dependencies are inferred from the claim text.