Magnetic core selection device and method for a magnetic balance DC current sensor

A DC current and sensor technology, applied in the field of magnetic core selection device of magnetic balance DC current sensor, can solve the problem that the excitation magnetic core cannot be replaced, etc.

Active Publication Date: 2021-09-10
SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Usually the number of turns of the compensation coil is on the order of thousands of turns and after the winding is completed, the excitation core cannot be replaced

Method used

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  • Magnetic core selection device and method for a magnetic balance DC current sensor

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Embodiment Construction

[0031] Below in conjunction with the drawings, preferred embodiments of the present invention are given and described in detail.

[0032] Such as figure 1 Shown is a magnetic core selection device of a magnetic balance DC current sensor according to an embodiment of the present invention, which is used to detect a measured magnetic core 10, which includes an excitation winding 1, a modulation signal unit 2, a demodulation unit 3, two A single-turn reserved wire, two connection terminals p1, p2, a power amplification unit 4, a test signal unit 5 and a test signal detection unit 6.

[0033] Excitation winding 1, which is wound on the magnetic core 10 under test; the number of turns of the excitation winding 1 is set according to the needs of the batches of the magnetic core 10 under test, and the number of turns of the excitation winding 1 is equal to the number of turns of the magnetic core 10 under test. The number of lower safe winding turns when the magnetic core of the DC ...

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Abstract

The invention provides a magnetic core selection device for a magnetic balance DC current sensor, comprising: an excitation winding wound on the magnetic core to be tested; a modulation signal unit connected to one end of the excitation winding; a demodulation unit connected to the other end of the excitation winding Connection; the first and second reserved wires of a single turn pass through the magnetic core under test; the power amplifier unit, the input end is connected to the demodulation unit, and the output end is connected to one end of the second reserved wire; the test signal unit is connected to One end of the first reserved wire is configured to provide a test signal; and a test signal detection unit, the first resistor and the second resistor are connected to the other end of the corresponding reserved wire through the voltage output terminal, and the resistors are both grounded. The invention also provides a selection method. The device of the present invention only winds the excitation winding on the magnetic core to be tested, and replaces the winding of the compensation coil of the detection head with the second reserved wire of a single turn, so it is not necessary to wind the compensation coil on the current detection head, thereby reducing the detection head. winding cost.

Description

technical field [0001] The invention relates to a magnetic core selection device and method, in particular to a magnetic core selection device and method for a magnetic balance DC current sensor. Background technique [0002] With the gradual expansion of industrial applications of electricity and electronics and the development of related technologies, a large number of fine measurement requirements have arisen as the times require. Magnetically modulated DCCTs (DC current transducers, DC Current transformers) with AC and DC current measurement functions require extensive development and production. [0003] The magnetic balance DC current sensor can be a magnetically modulated DC current sensor or a fluxgate DC current sensor, which usually requires three magnetic cores to be wound into a current detection head that meets the requirements through a specific process. One of the coiled magnetic cores is used as the magnetic flux detection unit of the DCCT's own feedback con...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B07C5/02B07C5/344
CPCB07C5/02B07C5/344
Inventor 王东兴朱燕燕李瑞
Owner SHANGHAI ADVANCED RES INST CHINESE ACADEMY OF SCI
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