US 2019/0293694 A1 · CURRENT FAULT DETECTION SYSTEMS AND METHODS FOR A CURRENT SENSOR

Abstract

Systems and methods described herein provide a current sensor having fault detection circuitry configured to detect over-current and/or current faults corresponding to current through a conductor being greater than a predetermined level. The current sensor can include a shared signal path, a main signal path, and a fault detection signal path to perform both fault detection and current detection signal processing. The current sensor can include one or more magnetic field sensing elements configured to generate a magnetic field signal indicative of the current through the conductor, an analog-to-digital converter (ADC) configured to receive the magnetic field signal and convert the magnetic field signal into a digital signal, and a fault detector responsive to the digital signal to generate a fault signal indicative of the current through the conductor being greater than a predetermined level.

Claims29

Dependent claims

A current sensor comprising:

one or more magnetic field sensing elements configured to generate a magnetic field signal indicative of a current through a conductor;
an analog-to-digital converter (ADC) configured to receive the magnetic field signal and convert the magnetic field signal into a digital signal;
and
a fault detector responsive to the digital signal to generate a fault signal indicative of the current through the conductor being greater than a predetermined level.

1 more element

Dependencies are inferred from the claim text.

Facts

Application

15/928,689Filed 22 Mar 2018

Published

26 Sep 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification6 codes

G01R 15/20
Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks: using galvano-magnetic devices, e.g.…
G01R 19/16571
Circuits and arrangements for comparing voltage or current with one or several thresholds and for indicating the result not covered by subgroups…:…
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 19/2506
Using digital measurement techniques: arrangements for conditioning or analysing measured signals, e.g. for indicating peak values ; Details…

Current fault detection systems and methods for a current sensor

Life of this patent

Current fault detection systems and methods for a current sensor

Life of this patent

Abstract

Claims29