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Shielding-free anti-interference current sensor

A current sensor, unshielded technology, applied in the direction of only measuring current, measuring current/voltage, instruments, etc., can solve the problems of high manufacturing cost and inconvenient installation of Hall current sensor, and achieve low manufacturing cost, simple and reasonable structure, The effect of strong anti-interference ability

Pending Publication Date: 2018-07-24
NINGBO JINCHENG ELECTRONICS TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after using the magnetic core, the Hall current sensor has the disadvantages of inconvenient installation and high manufacturing cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Embodiment 1, this embodiment is mainly used for small current detection.

[0021] like figure 1 As shown, an unshielded anti-interference current sensor includes: an "S"-shaped current-carrying conductor 1, the current-carrying conductor 1 has a first corner 11 and a second corner 12, and when the current flows through the current-carrying When conducting 1, the magnetic field directions of the first corner 11 and the second corner 12 are opposite; a first Hall chip 2, the first Hall chip 2 is arranged on the inner side of the current-carrying conductor 1, and the first Hall chip 2 The central sensitive point is set corresponding to the first corner part 11. When the current flows through the current-carrying conductor 1, the magnetic field generated by the first corner part 11 passes through the first Hall chip vertically from the central sensitive point of the first Hall chip 2. 2; a second Hall chip 3, the second Hall chip 3 is connected in parallel with the first ...

Embodiment 2

[0029] Embodiment 2, this embodiment is mainly used for large current detection.

[0030] like figure 2 As shown, an unshielded anti-interference current sensor includes several Hall detection modules, and each Hall detection module includes an "S"-shaped current-carrying conductor 1, a first Hall chip 2 and a first Hall chip 2. Two Hall chips 3 , each current-carrying conductor 1 is sequentially connected in series, and any two first Hall chips 2 and / or second Hall chips 3 form a parallel connection.

[0031] The current-carrying conductor 1 has a first corner 11 and a second corner 12, and when the current flows through the current-carrying conductor 1, the first corner 11 and the second corner 12 of the same current-carrying conductor 1 have opposite magnetic field directions .

[0032] In each Hall detection module, the first Hall chip 2 is arranged on the inner side of the corresponding current-carrying conductor 1, and the central sensitive point of the first Hall chi...

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Abstract

The invention discloses a shielding-free anti-interference current sensor which comprises an S-shaped current carrying conductor, a first Hall chip and a second Hall chip. The current carrying conductor includes a first corner part and a second corner part, the first Hall chip is arranged in the internal side of the current carrying conductor, a central sensitive point of the first Hall chip is arranged corresponding to the first corner part, the second Hall chip is connected with the first Hall chip in parallel, the second Hall chip is arranged in the external side of the current carrying conductor, the second Hall chip is arranged reverse to the first Hall chip, and a central sensitive point of the second Hall chip is arranged corresponding to the second corner part. The shielding-free anti-interference current sensor is simple and reasonable in structure, convenient to install, lower in manufacturing cost and higher in anti-interference capability.

Description

technical field [0001] The invention relates to the technical field of current sensors, in particular to an unshielded anti-interference current sensor. Background technique [0002] The Hall current sensor is based on the working principle of the Hall direct amplifier, that is, when the primary current Ip flows through a long wire, a magnetic field is generated around the wire, and the magnitude of this magnetic field is proportional to the current flowing through the wire. The generated magnetic field is gathered in the magnetic ring, and is measured and amplified by the Hall device in the air gap of the magnetic ring. The output voltage Vs accurately reflects the primary current Ip and is processed by a special circuit for the detection of primary current changes. element. Hall current sensors are widely used in frequency conversion speed control devices, inverter devices, UPS power supplies, inverter welding machines, electrolytic plating, CNC machine tools, microcomput...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00
CPCG01R19/0092
Inventor 李涛周红战项乾坤吕航仇斌杰彭雁华
Owner NINGBO JINCHENG ELECTRONICS TECH
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