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Magnetic sheet, coil module having magnetic sheet, and non-contact power supply device
US2021183550A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2021183550-A1 |
| Application number | US-202016953689-A |
| Country | US |
| Kind code | A1 |
| Filing date | Nov 20, 2020 |
| Priority date | Dec 11, 2019 |
| Publication date | Jun 17, 2021 |
| Grant date | — |
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- Title
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- Abstract
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Abstract
Official abstract text for this publication.
A magnetic sheet according to the present invention contains Mn—Zn ferrite as a main component and is comprising of a sheet-shaped sintered body. In this magnetic sheet, a difference |σs−σc| between a residual stress σs in a surface layer portion and a residual stress σc in a central portion at a cross section is 20 MPa or less in absolute value.
First claim
Opening claim text (preview).
What is claimed is: 1 . A magnetic sheet comprising of a sheet-shaped sintered body, wherein the sintered body contains Mn—Zn ferrite as a main component, and a difference between a residual stress in a surface layer portion and a residual stress in a central portion at a cross section of the sintered body is 20 MPa or less in absolute value. 2 . The magnetic sheet according to claim 1 , wherein an average thickness of the sintered body is 2500 μm or less. 3 . The magnetic sheet according to claim 1 , wherein the difference between the residual stress in the surface layer portion and the residual stress in the central portion at the cross section of the sintered body is 10 MPa or less in absolute value. 4 . The magnetic sheet according to claim 1 , wherein the residual stress in the surface layer portion and the residual stress in the central portion are both compressive stresses at the cross section of the sintered body. 5 . A coil module comprising the magnetic sheet according to claim 1 . 6 . A non-contact power supply device comprising the coil module according to claim 5 .
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Classifications
Composite [nonstructural laminate] of inorganic material having metal-compound-containing layer and having defined magnetic layer · CPC title
in the form of sheets (H01F1/147 takes precedence) · CPC title
- H02J50/70Primary
involving the reduction of electric, magnetic or electromagnetic leakage fields · CPC title
Manufacturing of magnetic circuits by moulding or by pressing powder (magnetic cores made by moulding or by pressing powder H01F27/255; soft magnetic particles H01F1/20, H01F1/36) · CPC title
Inductive couplings {(for wireless supply or distribution of electric power using inductive coupling H02J50/10)} · CPC title
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Frequently asked questions
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- What does patent US2021183550A1 cover?
- A magnetic sheet according to the present invention contains Mn—Zn ferrite as a main component and is comprising of a sheet-shaped sintered body. In this magnetic sheet, a difference |σs−σc| between a residual stress σs in a surface layer portion and a residual stress σc in a central portion at a cross section is 20 MPa or less in absolute value.
- Who is the assignee on this patent?
- Tdk Corp
- What technology area does this patent fall under?
- Primary CPC classification H02J50/70. Mapped technology areas include Electricity.
- When was this patent published?
- Publication date Thu Jun 17 2021 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 2 related publications on this page (citations in our corpus or others sharing the same primary CPC).