US 2017/0285077 A1Published application

Current difference sensors, systems and methods

AssigneeInfineon Technologies AG

InventorsUdo Ausserlechner, Berthold Astegher

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Abstract

Embodiments relate to current difference sensors, systems and methods. In an embodiment, a current difference sensor includes first and second conductors arranged relative to one another such that when a first current flows through the first conductor and a second current, equal to the first current, flows through the second conductor, a first magnetic field induced in the first conductor and a second magnetic field induced in the second conductor cancel each other at a first position and a second position; and first and second magnetic field sensing elements arranged at the first and second positions, respectively.

Claims9

Dependent claims

A current sensor comprising:

a plurality of conductors comprising a first conductor configured to conduct a first current that generates a first magnetic field in a first direction, and a second conductor configured to conduct a second current that generates a second magnetic field in the first direction, wherein the plurality of conductors is configured to approximately cancel the first magnetic field in the first direction and the second magnetic field in the first direction at a first location and a second location;
and
a plurality of magnetic field sensing elements configured to sense the first magnetic field and the second magnetic field in the first direction at the first location and the second location, and provide information regarding at least one of a difference or a sum of the first current and the second current, based on the first magnetic field and the second magnetic field.

Dependencies are inferred from the claim text.

Facts

Application: 15/603,708Filed 24 May 2017
Priority: 24 Jan 2011
Published: 5 Oct 2017
Term ends: Not estimatedThe source records don’t support an estimate.

Classification8 codes

G01R 17/02
Measuring arrangements involving comparison with a reference value, e.g. bridge: arrangements in which the value to be measured is automatically…
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 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…:…

Family

Application13/012,096Continuation · filed 24 Jan 2011
Application14/636,573Division · filed 3 Mar 2015
Application15/603,708Division
Application14/636,573Continuation
US 10,488,445 B2Related patent
US 2012/0187943 A1Published application
US 2015/0177339 A1Published application
US 8,975,889 B2Related patent
US 9,678,172 B2Related patent
US 2017/0285077 A1This patent

From the US filing history. Foreign family members aren’t listed.

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