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A Closed Loop Hall Current Sensor

A current sensor, closed-loop Hall technology, applied in the direction of only measuring current, measuring current/voltage, instruments, etc., can solve the problems of disassembly, inability to install and use, inconvenient for flexible application, poor stability, etc., to achieve simplicity and accuracy Improve, facilitate installation and debugging, and improve the effect of application limitations

Active Publication Date: 2019-04-23
深圳青铜剑技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The open-loop Hall current sensor has simple process, low cost, diverse installation methods, large measured current, and is convenient for production and application. However, the detection accuracy is greatly affected by interference factors such as external environment and temperature, and the stability is not good. The frequency can only be below 50kHz, and it cannot be used normally in some high-frequency environments and environments with many interference sources
The closed-loop Hall current sensor has high precision, strong anti-interference, good stability, and the working frequency can reach 200kHz. However, due to the particularity of its principle, the installation method has limitations. It is generally divided into two forms: overall through-hole installation and PCB installation. , it is not convenient for users to apply flexibly, and it cannot be installed and used in special occasions where the busbar overcurrent cable is inconvenient to disassemble

Method used

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  • A Closed Loop Hall Current Sensor
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  • A Closed Loop Hall Current Sensor

Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0032] A closed-loop Hall current sensor 10 such as figure 1 , Figure 1a As shown, it includes a magnetic gathering ring, a secondary coil 3, a Hall element 4 and a circuit controller 5. The magnetic gathering ring includes two separate magnetic cores 1 and 2, and the magnetic core 1 and the magnetic core 2 respectively have Two ends, each end is designed as a toothed structure, the toothed structure at the end of the magnetic core 1 matches the toothed structure at the end of the magnetic core 2, such as Figure 1a As shown, the two ends of the core 1 and the core 2 are seamlessly meshed with each other to form a closed magnetic gathering ring. The magnetic core 1 and the magnetic core 2 are respectively part of the magnetic gathering ring. The magnetic core 2 has an air gap. No air gap is set on 1, the Hall element 4 is set at the air gap position on the magnetic core 2, the secondary coil 3 surrounds the magnetic core 2, the circuit controller 5 is connected with the seco...

specific Embodiment approach 2

[0040] A closed-loop Hall current sensor 20 such as figure 2 , Figure 2a As shown, it includes a magnetic gathering ring, secondary coils 3 and 7, Hall elements 4 and 6, and a circuit controller 5. The magnetic gathering ring includes two separate magnetic cores 1 and 2, and magnetic core 1 and The magnetic core 2 has two ends respectively, and each end is designed as a tooth-shaped structure, and the tooth-shaped structure at the end of the magnetic core 1 matches the tooth-shaped structure at the end of the magnetic core 2, as Figure 2aAs shown, the two ends are seamlessly meshed with each other to form a closed magnetic gathering ring, and the magnetic core 1 and the magnetic core 2 are respectively part of the magnetic gathering ring, and the magnetic core 1 and the magnetic core 2 have air gaps respectively; the Hall element 4 Set at the air gap position on the magnetic core 2, the secondary coil 3 surrounds the magnetic core 2; the Hall element 6 is set at the air ga...

specific Embodiment approach 3

[0048] A closed-loop Hall current sensor 30 such as image 3 , Figure 3a As shown, it includes a magnetic gathering ring, secondary coils 3 and 7, Hall elements 4 and 6, and a circuit controller 5. The magnetic gathering ring includes a first magnetic gathering ring and a second magnetic gathering ring isolated from each other, so The first magnetic gathering ring includes two separate magnetic cores 101 and 102. The magnetic core 101 and the magnetic core 102 have two ends respectively, and each end is a tooth-like structure. The toothed structure is matched with the toothed structure at the end of the magnetic core 102, and the two ends are seamlessly meshed with each other to form a closed first magnetic gathering ring, and there is an air gap on the first magnetic gathering ring; the second magnetic gathering ring The ring includes two separate magnetic cores 201 and 202. The magnetic core 201 and the magnetic core 202 have two ends respectively, and each end is a toothe...

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Abstract

The invention discloses a closed-loop Hall current sensor. The closed-loop Hall current sensor comprises a magnetic ring, a secondary coil, a Hall element, a frame, a circuit board, a cover plate and a housing, wherein the housing, the magnetic ring, the secondary coil, the Hall element, the frame, the circuit board and the cover plate each comprises two separate parts, the two separate magnetic cores are engaged to each other in a seamless mode to form the closed magnetic ring, each housing part is internally provided with one separate magnetic ring part, one separate secondary coil part, one separate Hall element part, one separate frame part and one separate circuit board part, the two separate housing parts are connected together to form a Hall current sensor, and the magnetic cores in the two separate housing parts are engaged seamlessly at the connecting position of the housing parts; an air gap is arranged in at least one magnetic core; the separate cover plate parts respectively cover the two separate housing parts; and the separate structure of the housing enables the closed-loop Hall current sensor to be separated into two independent parts, the installation is convenient, and such a closed-loop structure can also improve the current detection precision.

Description

technical field [0001] The invention relates to a current sensor, in particular to an openable and closed-loop Hall current sensor. Background technique [0002] The sensor is a detection device that can detect the relevant information of the equipment under inspection, and transform it into an electrical signal or other required form of information output according to a certain rule, so as to meet the requirements of information transmission, processing, storage, display, recording and control. . Sensors have a wide range of applications and provide an essential technical support for instrumentation equipment. The Hall current sensor is a current detection element developed by applying the Hall effect principle to isolate and detect the primary current. The magnetic field generated by the primary current is collected by the magnetic gathering ring, and the Hall element placed in the magnetic gathering ring The magnetic field is collected to generate a Hall voltage that is...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R19/00
CPCG01R19/0092
Inventor 刘桃明傅俊寅李玉容
Owner 深圳青铜剑技术有限公司