US 2021/0263077 A1 · CURRENT SENSOR

Abstract

A current sensor that is less affected by the residual magnetization is provided. A current sensor of the present invention has a magnetic circuit that is magnetized by electric current; a first magnetic field detecting element that is positioned where a magnetic field, when the electric current is present, is directed in a same direction as a magnetic field that is caused by residual magnetization of the magnetic circuit when the electric current is not present; and a second magnetic field detecting element that is positioned where a magnetic field, when the electric current is present, is directed opposite to a direction of a magnetic field that is caused by residual magnetization of the magnetic circuit when the electric current is not present.

Claims20

Dependent claims

A current sensor comprising:

a magnetic circuit that is magnetized by electric current;
a first magnetic field detecting element that is positioned where a magnetic field, when the electric current is present, is directed in a same direction as a magnetic field that is caused by residual magnetization of the magnetic circuit when the electric current is not present;
and
a second magnetic field detecting element that is positioned where a magnetic field, when the electric current is present, is directed opposite to a direction of a magnetic field that is caused by residual magnetization of the magnetic circuit when the electric current is not present.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

17/155,527Filed 22 Jan 2021

Priority

JP 2020-02857721 Feb 2020

Published

26 Aug 2021

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

G01R 15/202
Using galvano-magnetic devices, e.g. Hall-effect devices , i.e. measuring a magnetic field via the interaction between a current and a magnetic…:…
G01R 15/205
Using galvano-magnetic devices, e.g. Hall-effect devices , i.e. measuring a magnetic field via the interaction between a current and a magnetic…:…
G01R 15/207
Using galvano-magnetic devices, e.g. Hall-effect devices , i.e. measuring a magnetic field via the interaction between a current and a magnetic…:…
G01R 19/0092
Arrangements for measuring currents or voltages or for indicating presence or sign thereof: measuring current only

Current sensor

Life of this patent

Current sensor

Life of this patent

Abstract

Claims20