Patent ID: 11862387
Assignee: TAIYO YUDEN CO., LTD.
Field: Electrical machinery, apparatus, energy (Electrical engineering)
Classification: CPC H | IPC H

Claim 17:
18. A coupled inductor comprising
a base body made of a magnetic material and having a first surface that extends in a first direction and a second direction orthogonal to the first direction and has a first dimension in the first direction larger than a second dimension in the second direction, a second surface that faces the first surface, a third surface that connects an end of the first surface in the first direction and an end of the second surface in the first direction, a fourth surface that faces the third surface, a fifth surface that connects the third surface and the fourth surface, and a sixth surface that faces the fifth surface;
a first coil conductor having a first winding portion that extends around a coil axis intersecting the first surface and the second surface;
a second coil conductor having a second winding portion that extends around the coil axis;
a first external electrode disposed on the base body and connected to one end of the first coil conductor; and
a second external electrode disposed on the base body and connected to the other end of the first coil conductor,
a third external electrode disposed on the base body and connected to one end of the second coil conductor; and
a fourth external electrode disposed on the base body and connected to the other end of the second coil conductor,
wherein when viewed from a direction of the coil axis, the first winding portion includes a first portion that faces the third surface and is curved toward the third surface, a second portion that faces the fourth surface and is curved toward the fourth surface, a third portion that connects the first portion and the second portion and faces the fifth surface, and a fourth portion that connects the first portion and the second portion and faces the sixth surface,
wherein radii of curvature of the first portion and the second portion are both smaller than radii of curvature of the third portion and the fourth portion,
wherein when viewed from the direction of the coil axis, a distance between the first portion and the third surface is larger than a distance between the third portion and the fifth surface,
wherein when viewed from a direction of the coil axis, the second winding portion includes a fifth portion that faces the third surface and is curved toward the third surface, a sixth portion that faces the fourth surface and is curved toward the fourth surface, a seventh portion that connects the fifth portion and the sixth portion and faces the fifth surface, and a eighth portion that connects the fifth portion and the sixth portion and faces the sixth surface,
wherein radii of curvature of the fifth portion and the sixth portion are both smaller than radii of curvature of the seventh portion and the eighth portion,
wherein when viewed from the direction of the coil axis, a distance between the fifth portion and the third surface is larger than a distance between the seventh portion and the fifth surface.