Giant magnetoresistance element and current sensor using the same
US-2015377985-A1 · Dec 31, 2015 · US
Current sensor
US2017285076A1 · US · A1
| Field | Value |
|---|---|
| Publication number | US-2017285076-A1 |
| Application number | US-201715471914-A |
| Country | US |
| Kind code | A1 |
| Filing date | Mar 28, 2017 |
| Priority date | Apr 1, 2016 |
| Publication date | Oct 5, 2017 |
| Grant date | — |
How to read this patent
A practical reading order for non-experts. Skip the full description unless you need deep technical detail.
- Title
What the patent document calls the invention.
- Abstract
A short plain-language summary of the technical disclosure.
- Assignees and inventors
Who owns or filed the patent and who is credited as inventor.
- Key dates
Filing, priority, publication, and grant dates set the timeline.
- First independent claim
The legal scope of protection — read this for what is actually claimed.
- CPC / IPC classifications
Technology tags used to group this patent with similar filings.
- Citations and related patents
Prior art links and similar publications in this corpus.
Abstract
Official abstract text for this publication.
A current sensor includes a busbar carrying an electric current to be measured, a magnetic sensing element for detecting intensity of a magnetic field generated by the current flowing through the busbar, and a pair of shield plates that include magnetic materials and are arranged to sandwich the busbar in a thickness direction of the busbar. The shield plates include a conductive shield plate including a conductive magnetic material and a non-conductive shield plate including a non-conductive magnetic material. The conductive shield plate includes a slit penetrating therethrough. The magnetic sensing element is arranged at a position where the magnetic sensing element overlaps the slits in the thickness direction and does not overlap the conductive shield plate in the thickness direction.
First claim
Opening claim text (preview).
What is claimed is: 1 . A current sensor, comprising: a busbar carrying an electric current to be measured; a magnetic sensing element for detecting intensity of a magnetic field generated by the current flowing through the busbar; and a pair of shield plates that comprise magnetic materials and are arranged to sandwich the busbar in a thickness direction of the busbar, wherein the shield plates comprise a conductive shield plate comprising a conductive magnetic material and a non-conductive shield plate comprising a non-conductive magnetic material, wherein the conductive shield plate comprises a slit penetrating therethrough, and wherein the magnetic sensing element is arranged at a position where the magnetic sensing element overlaps the slit in the thickness direction and does not overlap the conductive shield plate in the thickness direction. 2 . The current sensor according to claim 1 , wherein the slit is formed such that the conductive shield plate is split into halves in a longitudinal direction of the busbar. 3 . The current sensor according to claim 1 , wherein the non-conductive shield plate is arranged farther from the busbar than the conductive shield plate. 4 . The current sensor according to claim 1 , wherein the conductive shield plate is magnetically adhered to the non-conductive shield plate. 5 . The current sensor according to claim 1 , wherein the busbar comprises a through-hole penetrating therethrough and current paths formed on both sides of the through-hole, the through-hole is formed at a position where the through-hole overlaps the slit in the thickness direction and does not overlap the conductive shield plates in the thickness direction, and the magnetic sensing element is arranged at a position overlapping the through-hole in the thickness direction.
Assignees
Inventors
Classifications
Compensating stray fields {(G01R33/0017 takes precedence)} · CPC title
- G01R15/205Primary
using magneto-resistance devices, e.g. field plates · CPC title
- G01R33/093Primary
using multilayer structures, e.g. giant magnetoresistance sensors (thin magnetic films H01F10/00) · CPC title
Patent family
Related publications grouped by family.
External sources
Frequently asked questions
Answers are generated from the same data shown on this page.
- What does patent US2017285076A1 cover?
- A current sensor includes a busbar carrying an electric current to be measured, a magnetic sensing element for detecting intensity of a magnetic field generated by the current flowing through the busbar, and a pair of shield plates that include magnetic materials and are arranged to sandwich the busbar in a thickness direction of the busbar. The shield plates include a conductive shield plate i…
- Who is the assignee on this patent?
- Hitachi Metals Ltd
- What technology area does this patent fall under?
- Primary CPC classification G01R15/205. Mapped technology areas include Physics.
- When was this patent published?
- Publication date Thu Oct 05 2017 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 8 related publications on this page (citations in our corpus or others sharing the same primary CPC).