Laminated core and electric motor
US-2022028608-A1 · Jan 27, 2022 · US
Electrical steel lamination stacks with magnetic insulator coating for electrical apparatus cores
US2023238163A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2023238163-A1 |
| Application number | US-202217583080-A |
| Country | US |
| Kind code | A1 |
| Filing date | Jan 24, 2022 |
| Priority date | Jan 24, 2022 |
| Publication date | Jul 27, 2023 |
| Grant date | — |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A core for an electrical apparatus includes a plurality of electrical steel sheets having a ferromagnetic or ferrimagnetic coating applied to both sides of the electrical steel sheets. The electrical steel sheets are arranged in a stack to form a laminated stack. The ferromagnetic or ferrimagnetic coating is applied to both sides of the electrical steel sheets. The coating may comprise MnZn ferrites, NiZn ferrites, MgMnZn ferrites, CoNiZn ferrites, Co ferrites, Ni ferrites, Yttrium iron garnets (Y3Fe5O12) or other ferromagnetic or ferrimagnetic coating materials.
First claim
Opening claim text (preview).
What is claimed is: 1 . A core for an electrical apparatus comprising: a plurality of electrical steel sheets arranged in a stack to form a laminated stack; and a ferromagnetic or ferrimagnetic coating applied to both sides of the electrical steel sheets, wherein the relative magnetic permeability of the coating is between μ r =5 to 20,000. 2 . The core of claim 1 wherein the coating is electrically insulating and has a finite and greater than 1 dielectric constant. 3 . The core of claim 1 wherein the coating consists of: MnZn ferrites; NiZn ferrites; MgMnZn ferrites; CoNiZn ferrites; Co ferrites; Ni ferrites; or Yttrium iron garnets (Y3Fe5O12). 4 . The core of claim 1 wherein the coating has a thickness of between is 0.05 and 5 micrometers. 5 . The core of claim 1 wherein the core is adapted to be used in a transformer. 6 . The core of claim 1 wherein the core is adapted to be used in an inductor. 7 . The core of claim 1 wherein the core is adapted to be used in a stator. 8 . The core of claim 1 wherein the core is adapted to be used in a rotor. 9 . A core for an electrical apparatus comprising: a plurality of electrical steel sheets arranged in a stack to form a laminated stack; and an electrically insulative magnetically permeable coating applied to both sides of the electrical steel sheets, wherein the relative electrical permittivity of the coating is finite and greater than 1, and the relative magnetic permeability of the coating is between μ r =5 to 20,000. 10 . The core of claim 9 wherein the coating consists essentially of: MnZn ferrites; NiZn ferrites; MgMnZn ferrites; CoNiZn ferrites; Co ferrites; Ni ferrites; or Yttrium iron garnets (Y3Fe5O12). 11 . The core of claim 9 wherein the coating has a thickness of between 0.05 and 5 micrometers. 12 . The core of claim 9 wherein the core is adapted to be used in a transformer. 13 . The core of claim 9 wherein the core is adapted to be used in an inductor. 14 . The core of claim 9 wherein the core is adapted to be used in a stator. 15 . The core of claim 1 wherein the core is adapted to be used in a rotor. 16 . A core for an electrical apparatus comprising: a plurality of electrical steel sheets arranged in a stack to form a laminated stack; and a ferromagnetic or ferrimagnetic coating applied to both sides of the electrical steel sheets, wherein the coating comprises: MnZn ferrites; NiZn ferrites; MgMnZn ferrites; CoNiZn ferrites; Co ferrites; Ni ferrites; or Yttrium iron garnets (Y3Fe5O12). 17 . The core of claim 16 wherein the coating has a thickness of between 0.05 and 5 micrometers. 18 . The core of claim 16 wherein the relative magnetic permeability of the coating is between μ r =5 to 20,000.
Assignees
Inventors
Classifications
Ferrites · CPC title
Manufacturing of magnetic circuits made from sheets (magnetic cores made from sheets H01F27/245; soft magnetic alloys in the form of sheets H01F1/16) · CPC title
- H01F1/344Primary
Ferrites, e.g. having a cubic spinel structure (X2+O)(Y23+O3), e.g. magnetite Fe3O4 · CPC title
characterised by the magnetic material · CPC title
- H01F27/245Primary
made from sheets, e.g. grain-oriented (H01F27/26 takes precedence) · CPC title
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- What does patent US2023238163A1 cover?
- A core for an electrical apparatus includes a plurality of electrical steel sheets having a ferromagnetic or ferrimagnetic coating applied to both sides of the electrical steel sheets. The electrical steel sheets are arranged in a stack to form a laminated stack. The ferromagnetic or ferrimagnetic coating is applied to both sides of the electrical steel sheets. The coating may comprise MnZn fer…
- Who is the assignee on this patent?
- Ford Global Tech Llc
- What technology area does this patent fall under?
- Primary CPC classification H01F1/344. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Jul 27 2023 00:00:00 GMT+0000 (Coordinated Universal Time) (A1). Legal status and post-grant events are not shown on this page.
- What related patents are in patentsdb?
- We list 4 related publications on this page (citations in our corpus or others sharing the same primary CPC).