Unlock instant, AI-driven research and patent intelligence for your innovation.

Electric current transducer

A current sensor and current direction technology, applied in the direction of measuring current/voltage, instruments, measuring electrical variables, etc., can solve the problem of not being able to measure DC current, and achieve short response time, wide measurement range, and reliable current measurement and control. Effect

Active Publication Date: 2014-02-05
谭成忠
View PDF4 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

A piezoelectric current sensor (patent number: 2001120038603.2) authorized by the inventor of this technology based on the compression deformation of the energized conductor uses piezoelectric devices to measure the deformation of the conductor and the current of the energized conductor. It has the characteristics of small electromagnetic interference and good temperature characteristics. It is a passive current sensor, but this technology cannot be used to measure DC current

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Electric current transducer
  • Electric current transducer
  • Electric current transducer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] A passive current sensor consists of a cylindrical energized conductor 1 and electrodes 2, such as figure 2 As shown, the contact points between the two electrodes 2 and the energized conductor 1 are distributed on a plane perpendicular to the current direction, and are fixed at different distances from the axis of the conductor 1. The voltage signal between the two electrodes 2 is determined by the lead out. The radius of the cylindrical current-carrying conductor 1 is r . The tangential magnetic field on the circumference of the columnar conductor is perpendicular to the direction of the current, and the magnitude of the magnetic induction is

[0034] . (8)

[0035] The relationship between radial electromotive force difference and current is

[0036] . (9)

[0037] It can be calibrated by measuring the radial electromotive force difference under this condition with a given current value U and I 2 constant of proportionality between mu 0 / (2π 2 qnr ...

Embodiment 2

[0039] A passive current sensor consists of a cylindrical conducting conductor 1 and electrodes 2, such as image 3 As shown, the contact points between the two electrodes 2 and the current conductor 1 are distributed on the inner and outer sides of the cylindrical current conductor 1, and the voltage signal between the two electrodes 2 is drawn out from the leads on the electrodes. The inner and outer diameters of the cylindrical conductor 1 are respectively r 1 and r 2 . The relationship between the voltage between the two electrodes 2 and the energized current is

[0040] . (10)

[0041] It can be calibrated by measuring the radial electromotive force difference under this condition with a given current value U and I 2 constant of proportionality between mu 0 / [2π 2 qn ( r 2 2 - r 1 2 )]. After calibration, the current through the conductor can be determined by measuring the radial emf difference. In order to eliminate the interference of the extern...

Embodiment 3

[0043] A passive current sensor consists of a strip-shaped energized conductor 1 and electrodes 2, such as Figure 4 As shown, the contact points between the two electrodes 2 and the energized conductor 1 are distributed on a plane perpendicular to the current direction, and are fixed at different distances from the axis of the conductor 1. The voltage signal between the two electrodes 2 is determined by the lead out. It can be calibrated by measuring the radial electromotive force difference under this condition with a given current value U and I 2 constant of proportionality between. By measuring the difference in radial emf, the current through the conductor can be determined. In order to eliminate the interference of the external magnetic field, a ferrite ring can be put on the position of the electrode lead wire.

[0044] The passive current sensor provided by the invention has the characteristics of simple structure and no magnetic saturation, and can measure direct...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

An electric current transducer is characterized by being composed of an energized conductor (1) and electrodes (2), the contact points of the two electrodes (2) and the energized conductor (1) are distributed on the plane perpendicular to the current direction and fixed to the positions away from the axis of the conductor (1), wherein the distances from the positions to the axis are different, and voltage signals between the two electrodes (2) are led out through leads on the electrodes. The output voltage signals are in direct proportion to the square of currents. The electric current transducer can measure the direct currents, the alternating currents and the transient currents in a wide range.

Description

technical field [0001] The invention relates to a current sensor, which has special uses in the current measurement and control of power supply and substation equipment, and can also be widely used in current measurement, control, calibration, and overcurrent protection and monitoring of industrial products and equipment, including railway mobile Vehicle instantaneous current detection and measurement, control and protection of large current in metal smelting and chemical industries. Background technique [0002] Current sensing and measurement is a research topic widely involved in engineering technology and scientific research, such as current measurement and control of power supply and transformation equipment, current measurement, control, calibration, and overcurrent protection and monitoring of industrial products and equipment. At present, the traditional current sensors include resistance method, current sensor based on Hall effect and fiber optic current sensor base...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01R19/00
Inventor 谭成忠
Owner 谭成忠