# US 12,191,066 B2 · Compact power inductor

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- Number: US 12,191,066 B2
- Document ID: US12191066B2
- Status: Granted
- Kind: B2
- Application number: 17/145,064
- Filed: 2021-01-08
- Published: 2022-07-14
- Granted: 2025-01-07
- Earliest claimed: 2021-01-08
- Assignees: Ford Global Technologies, LLC
- Applicants: Ford Global Technologies, LLC
- Inventors: Lihua Chen; Baoming Ge; Fan Wang
- Web page: https://patentgrep.com/patent/US12191066B2

## CPC

- H01F 27/28: Coils; Windings; Conductive connections
- H01F 37/00: Fixed inductances not covered by group H01F17/00
- H01F 27/022: {Encapsulation}
- H01F 27/025: {Constructional details relating to cooling}
- H01F 27/08: Cooling (heat-transfer elements F28F); Ventilating (structural details of casings H01F27/02)
- H01F 27/10: Liquid cooling
- H01F 27/24: Magnetic cores
- H01F: MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES

## Abstract

A closed ferromagnetic housing has a pair of access ports and a center ferromagnetic post extending from and between opposite ends thereof. At least one conductor, contained within and completely surrounded by the closed ferromagnetic housing, is wound around the center ferromagnetic post such that the closed ferromagnetic housing, center ferromagnetic post, and at least one conductor form an inductor in which the ferromagnetic housing and the center ferromagnetic post define a core of the inductor and the at least one conductor defines a coil of the inductor. The access ports are configured to permit flow of coolant into the closed ferromagnetic housing and around the center ferromagnetic post to cool the at least one conductor.

## Claims

### Claim 1

A power system comprising:
a closed ferromagnetic housing having a pair of fluid access ports and a center ferromagnetic post extending from and between opposite ends thereof; and
at least one conductor, contained within and completely surrounded by the closed ferromagnetic housing, wound around the center ferromagnetic post such that the closed ferromagnetic housing, center ferromagnetic post, and at least one conductor form an inductor in which the ferromagnetic housing and the center ferromagnetic post define a core of the inductor and the at least one conductor defines a coil of the inductor.

### Claim 2 (depends on 1)

The power system of claim 1, wherein the closed ferromagnetic housing further defines a wall around the center ferromagnetic post and wherein the wall has a gapped portion filled with a non-ferromagnetic material separating upper and lower sections of the wall.

### Claim 3 (depends on 1)

The power system of claim 1, wherein the closed ferromagnetic housing has no more than six sides.

### Claim 4 (depends on 1)

The power system of claim 1, wherein the closed ferromagnetic housing has a cuboid shape.

### Claim 5 (depends on 1)

The power system of claim 1, wherein the fluid access ports are disposed on a same end of the closed ferromagnetic housing.

### Claim 6 (depends on 1)

The power system of claim 1, wherein the center ferromagnetic post and the at least one conductor define a gap therebetween.

### Claim 7 (depends on 1)

The power system of claim 1, wherein the closed ferromagnetic housing and the at least one conductor define a gap therebetween.

### Claim 8

A power component comprising:
an inductor including a ferromagnetic container and a coil disposed therein, wherein the ferromagnetic container defines a wall around the coil and access ports configured to permit flow of coolant into and out of the ferromagnetic container, and around the coil, and wherein the wall has a gapped portion around a perimeter thereof filled with a non-ferromagnetic material separating upper and lower sections of the wall.

### Claim 9 (depends on 8)

The power component of claim 8, wherein the ferromagnetic container has a center post extending from and between opposite ends thereof.

### Claim 10 (depends on 9)

The power component of claim 9, wherein the coil is wound around the center post.

### Claim 11 (depends on 8)

The power component of claim 8, wherein the ferromagnetic container has a cuboid shape.