Common-mode choke coil
AssigneeTDK Corporation
InventorsToshio Tomonari, Tomokazu Ito, Toshihiro Kuroshima
Life of this patent
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Abstract
A common-mode choke coil has first and second coil parts, a first inductance part, and a second inductance part. The first coil part and the second coil part are magnetically coupled to each other. The first inductance part is electrically connected in series to the first coil part and is not substantially magnetically coupled to the first coil part. The second inductance part is electrically connected in series to the second coil part and is not substantially magnetically coupled to the second coil part. The first inductance part and the second inductance part are not substantially magnetically coupled to each other.
Claims11
A common-mode choke coil comprising:
- first and second coil parts magnetically coupled to each other;
- a first inductance part electrically connected in series to the first coil part;
- and
- a second inductance part electrically connected in series to the second coil part, wherein
- the first inductance part is not substantially magnetically coupled to the first and second coil parts, and a coupling factor between the first inductance part and the first coil part and a coupling factor between the first inductance part and the second coil part are not more than 0.1;
- the second inductance part is not substantially magnetically coupled to the first and second coil parts, and a coupling factor between the second inductance part and the first coil part and a coupling factor between the second inductance part and the second coil part are not more than 0.1;
- and
- the first inductance part and the second inductance part are not substantially magnetically coupled to each other, and a coupling factor between the first inductance part and the second inductance part is not more than 0.1.
A common-mode choke coil comprising:
- magnetic layers;
- a first coil part including a first coil conductor disposed between the magnetic layers;
- a second coil part including a second coil conductor disposed between the magnetic layers;
- a first inductance part electrically connected in series to the first coil part and not substantially magnetically coupled to the first coil part, and including a conductor disposed between the magnetic layers;
- and
- a second inductance part electrically connected in series to the second coil part and not substantially magnetically coupled to the second coil part, and including a conductor disposed between the magnetic layers, wherein
- the first and second coil conductors are stacked through an insulator, and the first and second coil parts are magnetically coupled to each other, and
- the conductor included in the first inductance part does not overlap with the conductor included in the second inductance part when viewed from a stack direction of the first and second coil conductors.
Dependencies are inferred from the claim text.