Wire-wound inductor and method for manufacturing the same

Patent metadata

Field	Value
Publication number	US-9607752-B2
Application number	US-201514970418-A
Country	US
Kind code	B2
Filing date	Dec 15, 2015
Priority date	Jan 27, 2015
Publication date	Mar 28, 2017
Grant date	Mar 28, 2017

Abstract

A wire-wound inductor includes: a magnetic core; a first coil unit embedded in the magnetic core and formed by winding a conductive wire; a pair of second coil units bent from both ends of the first coil unit and including lead portions exposed to opposing surfaces of the magnetic core; and a pair of external terminals disposed on the opposing surfaces of the magnetic core and electrically connected to the lead portions of the pair of second coil units, respectively.

First claim

What is claimed is:

1. A wire-wound inductor comprising: a magnetic core; a first coil unit embedded in the magnetic core and formed by a wound conductive wire; a pair of second coil units bending from opposite ends of the first coil unit and including lead portions exposed to opposing surfaces of the magnetic core; and a pair of external terminals disposed on the opposing surfaces of the magnetic core and electrically connected to the lead portions of the pair of second coil units, respectively, wherein the pair of second coil units which extend from the opposite ends of the first coil unit are twisted, and a shape of a cross-section of each second coil unit corresponds to a shape of a cross-section of the first coil unit and wherein a ratio of a length of each second coil unit to a length of the magnetic core ranges from 0.1 to 0.14.

2. The wire-wound inductor of claim 1 , wherein the pair of second coil units extend from the opposite ends of the first coil unit to the opposing surfaces of the magnetic core.

3. A wire-wound inductor, comprising:
a magnetic core;
a first coil unit embedded in the magnetic core and formed by a wound conductive wire;
a pair of second coil units bending from opposite ends of the first coil unit and including lead portions exposed to opposing surfaces of the magnetic core; and
a pair of external terminals disposed on the opposing surfaces of the magnetic core and electrically connected to the lead portions of the pair of second coil units, respectively,
wherein a ratio of a length of each second coil unit to a length of the magnetic core ranges from 0.1 to 0.14.

4. The wire-wound inductor of claim 1 , wherein the first coil unit and the pair of second coil units are formed of a conductive wire having a rectangular cross-sectional shape.

5. The wire-wound inductor of claim 3 , wherein the pair of second coil units which extend from the opposite ends of the first coil unit are twisted.

6. The wire-wound inductor of claim 3 , wherein the pair of second coil units extend from the opposite ends of the first coil unit to the opposing surfaces of the magnetic core.

7. The wire-wound inductor of claim 3 , wherein the first coil unit and the pair of second coil units are formed of a conductive wire having a rectangular cross-sectional shape.

8. The wire-wound inductor of claim 3 , wherein the pair of second coil units extend radially from the first coil unit in a direction perpendicular to the opposing surfaces of the magnetic core.

9. The wire-wound inductor of claim 1 , wherein the pair of second coil units extend radially from the first coil unit in a direction perpendicular to the opposing surfaces of the magnetic core.

Assignees

• Samsung Electro Mech

Inventors

• Kim Yu Na
• Lee Jong Ho
• Shin Sang Ho
• Park Moon Soo

Classifications

• H01F2017/048

  with encapsulating core, e.g. made of resin and magnetic powder · CPC title

• H01F27/006 Primary

  with special arrangement or spacing of turns of the winding(s), e.g. to produce desired self-resonance · CPC title

• H01F27/292

  Surface mounted devices · CPC title

• H01F17/04

  with magnetic core · CPC title

• H01F41/084

  for forming pancake coils · CPC title