Current sensor, system and method

Abstract

The invention provides a current sensor, system and method. Embodiments relate to magnetic current sensors. In various embodiments, the current sensor may comprise a constant cross-sectional shape, such as circular, square, or rectangular, and typically without any grooves or trenches to divert current, resulting in a simpler manufacturing process, low resistance, and higher mechanical A simple conductor of strength. In embodiments, the conductor may be formed from a non-magnetic conductive material such as aluminum or copper.

Description

technical field [0001] The present invention relates generally to current sensors, and more particularly to magnetic current sensors suitable for high currents such as up to about 500 amperes (A). Background technique [0002] Conventional magnetic sensors for sensing current are known. Some current sensing systems utilize the closed-loop principle where a magnetic sensor is used as a null detector and the system generates a compensation field that cancels the magnetic field of the current being measured. Although accurate, such a system may face the significant power dissipation required to generate the compensating magnetic field. [0003] Other systems are open loop systems that are generally less accurate than the closed loop systems described above. Open loop systems typically use linear magnetic field sensors, such as Hall plates, and require specially shaped conductors that can be difficult and expensive to manufacture. [0004] These and other current sensors may ...

AI Technical Summary

Problems solved by technology

Open-loop systems typically use linear magnetic field sensors, such as Hall plates, and require specially shaped conductors that can be difficult and expensive to manufacture

[0004] These and other current sensors may also face other drawbacks including hysteresis, nonlinearity, limited cover-current capabilities and / or magnetic shielding

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