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Hall effect sensor core with multiple air gaps

By introducing a second air gap into the Hall effect current sensor core to reduce the magnetomotive force, the problem of core saturation in the high current range is solved, enabling a smaller and cheaper sensor design that can sense larger current value and maintain linear output.

Inactive Publication Date: 2015-04-15
ROCKWELL AUTOMATION TECH INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

These methods lead to larger devices that are more expensive to manufacture and take up more space

Method used

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Examples

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Embodiment Construction

[0026] The following discussion is presented to enable any person skilled in the art to make and use the embodiments of the invention. Various modifications to the illustrated embodiments will be readily apparent to those skilled in the art, and the general principles herein may be applied to other embodiments and applications without departing from the embodiments of the invention. Thus, there is no attempt to limit the embodiments of the present invention to those shown, but to give embodiments of the present invention the widest scope consistent with the principles and features disclosed herein.

[0027] Read the detailed description with reference to the accompanying drawings. The figures depict selected embodiments and are not intended to limit the scope of embodiments of the invention. A skilled artisan will recognize that there are many alternatives to the examples provided herein that are useful and fall within the scope of embodiments of the invention. Also, it is t...

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PUM

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Abstract

A hall effect current sensor including a mounting bracket, a sensor assembly, and a sensor core. The sensor assembly includes a flux sensor. The sensor core includes a first portion and a second portion. The first portion and the second portion define a first air gap and a second air gap between the first portion and the second portion. The first air gap is adapted to receive the sensor assembly.

Description

[0001] Cross References to Related Applications [0002] Not applicable. [0003] Statement Regarding Federally Sponsored Research or Development [0004] Not applicable. technical field [0005] The subject matter disclosed herein relates generally to Hall effect sensors, and more specifically, to Hall effect sensor cores that include more than one air gap. Background technique [0006] Hall effect current sensors are well known in the electronics arts. Hall effect current sensors are used to determine the current through a current conductor. A typical Hall effect current sensor allows the current conductor to pass through the central opening of the core. The core contains a single air gap into which the circuit board is mounted. A Hall effect device was mounted on the circuit board for measuring the flux density through the air gap in the core. The flux density across the air gap is linear and proportional to the current flowing through the conductor of a well-design...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00
CPCG01R15/202G01R15/185G01R33/07G01R33/072G01R19/0092G01R15/207G01R19/20G01R15/20
Owner ROCKWELL AUTOMATION TECH INC