# US 2014/0191834 A1 · Inductor apparatus and method of manufacture thereof

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- Number: US 2014/0191834 A1
- Document ID: US20140191834A1
- Status: Published application
- Kind: A1
- Application number: 13/737,781
- Filed: 2013-01-09
- Published: 2014-07-10
- Earliest claimed: 2013-01-09
- Assignees: CTM Magnetics, Inc.
- Inventors: Grant A. MacLennan
- Web page: https://patentgrep.com/patent/US20140191834A1

## CPC

- H01F 27/08: Cooling (heat-transfer elements F28F); Ventilating (structural details of casings H01F27/02)
- H01F 27/255: made from particles (H01F27/26 takes precedence)
- H01F 27/32: Insulating of coils, windings, or parts thereof
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES

## Abstract

The invention comprises an electrical apparatus and method of manufacture. The apparatus includes a substantially annular inductor comprising an inductor core composed of at least a distributed gap material. The distributed gap material includes particles of alternating layers of magnetic and non-magnetic materials separated by a gap material. The particles comprise an average layer thickness of less than about one hundred micrometers, where a majority of said layered particles comprise an average cross sectional size of less than about one millimeter. The inductor is cooled using at least one of: a thermally conductive potting material, a liquid coolant in direct contact with the inductor, a cooling line through the potting material or liquid coolant, and a chill coil in a container about the potting material and/or the liquid coolant.

## Claims

### Claim 1

An electrical apparatus, comprising:
a substantially annular inductor, said inductor comprising:
an inductor core comprising at least a distributed gap material, said distributed gap material comprising a plurality of particles, wherein each of said plurality of particles comprises at least four alternating layers, said alternating layers alternating between a magnetic material layer and a substantially non-magnetic material layer; and
at least one of:
an inductor core coating substantially coating at least a portion of said inductor core;
an inductor winding circumferentially wound about at least a portion of said inductor core; and
an inductor winding coating substantially coating at least a portion of said inductor winding; and
a liquid coolant directly contacting said inductor.