A current sensor

By using a coreless design and a current sensor with varying busbar widths, combined with a magnetic sensing unit and signal processing, the balance between measurement accuracy, size, and frequency response of current sensors has been resolved, resulting in a high-precision current sensor with strong anti-interference capabilities.

CN121114538BActive Publication Date: 2026-07-21MULTIDIMENSION TECH CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
MULTIDIMENSION TECH CO LTD
Filing Date
2025-09-18
Publication Date
2026-07-21

AI Technical Summary

Technical Problem

Existing current sensors struggle to balance measurement accuracy, size, frequency response, and cost, and suffer from limitations in high-frequency performance and large size due to the magnetic core.

Method used

Employing a coreless design, the device utilizes the width differences at different locations of the flow guide and the placement of magnetic sensing units to create a three-dimensional anti-interference capability. Combined with a signal processing module, it cancels out the influence of interfering magnetic fields in all directions, thereby improving measurement accuracy and range.

Benefits of technology

A current sensor with small size, wide measurement range, and high measurement accuracy has been developed, which can effectively cancel the influence of interfering magnetic fields and has high precision and three-dimensional anti-interference capability.

✦ Generated by Eureka AI based on patent content.

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Abstract

The application provides a current sensor. The current sensor is provided with four same magnetic sensitive components at corresponding positions on the upper and lower sides of a bus bar, the sensitive centers of the four magnetic sensitive components are symmetrical about the bus bar, and the sensing directions are parallel or anti-parallel to the width direction of the bus bar. The bus bar is a flat metal conductor, so as to offset the influence of the current at different positions of the bus bar on any two magnetic sensitive components symmetrical about the bus bar. In combination with the above hardware, corresponding sensing signal processing is adopted to obtain a target signal capable of representing the current size, phase and frequency in the bus bar, while the influence of constant interference fields in each direction is eliminated and three-dimensional anti-interference is realized. In addition, the current sensor provided by the application can also be provided with the four magnetic sensitive components and a signal conditioning unit on the upper and lower sides of a PCB stacked on the bus bar, so that the structure of the current sensor is compact and the size is reduced.
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