Amorphous nanocrystalline special-shaped magnetic core-based direct current type current sensor

An amorphous nanocrystalline, current sensor technology, applied in voltage/current isolation, measuring current/voltage, instruments, etc., can solve the problems of poor linearity, temperature stability, affecting sensor measurement accuracy, etc., to avoid distribution Non-uniformity, good linearity of magnetic flux density and current

Inactive Publication Date: 2019-05-21
NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, Permalloy has the disadvantages of saturation magnetic induction, stress sensitivity, and poor temperature stability. Therefore, the direct current sensor has the following problems: 1) The power deviation is large. The power deviation is caused by the temperature rise of the Hall current sensor when it is working, and the power deviation is large. Directly affects the reliability of the current sensor measurement
2) The temperature stability is poor, and the temperature stability affects the magnetic signal induced by the Hall element and the voltage signal of the subsequent amplified output during measurement, which in turn affects the measurement accuracy of the sensor
3) The linearity of the working area is poor, and the linearity deviation is caused by the magnetic saturation of the magnetic core. The saturation magnetic induction of permalloy is low, which affects the measurement range of the direct current sensor

Method used

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  • Amorphous nanocrystalline special-shaped magnetic core-based direct current type current sensor
  • Amorphous nanocrystalline special-shaped magnetic core-based direct current type current sensor
  • Amorphous nanocrystalline special-shaped magnetic core-based direct current type current sensor

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Embodiment 1

[0032] like figure 1 As shown, a direct-amplification current sensor based on an iron-based amorphous shaped magnetic core, the sensor includes a Hall element 1, a triangular shaped shaped magnetic core 2, a conductor 3, a magnetic core opening air gap 4 and a signal output device 5. The Hall element 1 is located at the center of the air gap 2 of the magnetic core opening, and the Hall element 1 is connected with the signal output device 5 . The conductor 3 is located at the very center of the window of the triangular shaped magnetic core 2 .

[0033] The triangular special-shaped magnetic core 2 is cut from the iron-based amorphous broadband with low coercive force and high saturation magnetic induction according to the special-shaped structure; in order to protect the integrity of the iron-based amorphous special-shaped magnetic core For contact, the triangular shaped magnetic core 2 is formed by bonding layer by layer of adhesive, and the surface of the triangular shaped m...

Embodiment 2

[0041] Such as Figure 5 As shown, the present embodiment provides a direct discharge current sensor based on iron-based nanocrystalline special-shaped magnetic core, the structure of which is basically the same as that of the direct discharge current sensor in Embodiment 1. The special-shaped magnetic core 2 is an iron-based nanocrystalline broadband material; (2) In this embodiment, the number of open air gaps 4 of the triangular special-shaped magnetic core is two. The soft magnetic performance of the iron-based nanocrystalline broadband of this implementation is better than that of iron-based amorphous nanocrystalline soft magnetic materials, and the increase of the number of air gaps can improve the maximum working linear input current, so the direct current sensor of this embodiment improves The measurement range and accuracy of the sensor.

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Abstract

The invention discloses an amorphous nanocrystalline special-shaped magnetic core-based direct current type current sensor. The sensor comprises a triangular special-shaped magnetic core with an air gap, a conductor vertically passing through the center of the magnetic core, a Hall element at the center of the air gap, and a signal output device connected to the Hall element; a plurality of layersof triangular special-shaped amorphous-nanocrystalline soft magnetic broad bands are bonded through an adhesive layer by layer so as to form the triangular special-shaped magnetic core; and the surface of the triangular special-shaped magnetic core is coated with an adhesive film. Heat emitted by the special-shaped magnetic core in the direct current type current sensor can be decreased; and thestability, measurement accuracy and measurement range of the direct current type current sensor are improved.

Description

technical field [0001] The invention belongs to the technical field of current sensors, in particular to a direct discharge current sensor based on an amorphous and nanocrystalline magnetic core. Background technique [0002] The current sensor is a detection device that can feel the information of the measured current, and can transform the information sensed by the detection into an electrical signal that meets certain standards or other required forms of information output according to certain rules, so as to meet the information requirements. transmission, processing, storage, display, recording and control requirements. The direct current sensor is a device or module that uses soft magnetic materials to establish a low reluctance channel, and uses a Hall device to measure the magnetic field strength in it to describe the measured current in equal proportions. The electromagnetic output of the secondary side of the direct current sensor is proportional to the magnetic i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00G01R15/20
Inventor 贺爱娜董亚强黎嘉威满其奎李润伟
Owner NINGBO INST OF MATERIALS TECH & ENG CHINESE ACADEMY OF SCI
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