US 2024/0212920 A1Published application

Inductor and dc-dc converter using the same

AssigneeTDK Corporation

InventorTomofumi KURODA

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Abstract

In the inductor, when a voltage is applied via each terminal portion, a current flows through each of the first and second coil conductors. At this time, coupling may occur between the first and second coil conductors. However, since the first magnetic body is provided in the inductor, coupling between the first and second coil conductors is suppressed. In addition, since the pair of second magnetic bodies is additionally provided, high inductance can be realized.

Claims23

Dependent claims

An inductor comprising:

an element body including a first body portion constituted of material containing magnetic material, the element body having a rectangular parallelepiped outer shape and having a pair of first side surfaces facing each other in a first direction, a pair of second side surfaces facing each other in a second direction perpendicular to the first direction, and a pair of third side surfaces facing each other in a third direction perpendicular to both the first direction and the second direction;
a first coil conductor having a first conductor extending along the first direction in the element body, a second conductor extending along the first direction in the element body and adjacent to the first conductor in the second direction, and a third conductor extending along the second direction in the element body and connecting end portions on one side in the first direction of the first and second conductors;
a second coil conductor aligned with the first coil conductor in the third direction, the second coil conductor having the first conductor, the second conductor, and the third conductor;
a first magnetic body provided in the element body and having a magnetic permeability higher than that of the first body portion, the magnetic body having a rectangular parallelepiped outer shape and interposed between the first coil conductor and the second coil conductor in the third direction and having a pair of forth side surfaces facing each other in the first direction, a pair of fifth side surfaces facing each other in the second direction, and a pair of sixth side surfaces facing each other in the third direction;
and
a pair of second magnetic bodies provided in the element body and having a magnetic permeability higher than that of the first body portion, each of the second magnetic bodies having a rectangular parallelepiped outer shape, provided in an area different from an area where the first magnetic body is provided in a cross section perpendicular to the first direction, and having a pair of seventh side surfaces facing each other in the first direction, a pair of eighth side surfaces facing each other in the second direction, and a pair of ninth side surfaces facing each other in the third direction;
wherein, in a cross section perpendicular to the first direction, the first element body portion of the element body is located at least outside of the first and second conductors of each of the first and second coil conductors in the second direction.

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Dependencies are inferred from the claim text.

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Abstract

An inductor comprising:

an element body including a first body portion constituted of material containing magnetic material, the element body having a rectangular parallelepiped outer shape and having a pair of first side surfaces facing each other in a first direction, a pair of second side surfaces facing each other in a second direction perpendicular to the first direction, and a pair of third side surfaces facing each other in a third direction perpendicular to both the first direction and the second direction;
a first coil conductor having a first conductor extending along the first direction in the element body, a second conductor extending along the first direction in the element body and adjacent to the first conductor in the second direction, and a third conductor extending along the second direction in the element body and connecting end portions on one side in the first direction of the first and second conductors;
a second coil conductor aligned with the first coil conductor in the third direction, the second coil conductor having the first conductor, the second conductor, and the third conductor;
a first magnetic body provided in the element body and having a magnetic permeability higher than that of the first body portion, the magnetic body having a rectangular parallelepiped outer shape and interposed between the first coil conductor and the second coil conductor in the third direction and having a pair of forth side surfaces facing each other in the first direction, a pair of fifth side surfaces facing each other in the second direction, and a pair of sixth side surfaces facing each other in the third direction;
and
a pair of second magnetic bodies provided in the element body and having a magnetic permeability higher than that of the first body portion, each of the second magnetic bodies having a rectangular parallelepiped outer shape, provided in an area different from an area where the first magnetic body is provided in a cross section perpendicular to the first direction, and having a pair of seventh side surfaces facing each other in the first direction, a pair of eighth side surfaces facing each other in the second direction, and a pair of ninth side surfaces facing each other in the third direction;
wherein, in a cross section perpendicular to the first direction, the first element body portion of the element body is located at least outside of the first and second conductors of each of the first and second coil conductors in the second direction.

4 more elements