CN103575952A - Laterally-arranged type measurement structure and measurement method of current mutual inductance - Google Patents
Laterally-arranged type measurement structure and measurement method of current mutual inductance Download PDFInfo
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- CN103575952A CN103575952A CN201210249032.6A CN201210249032A CN103575952A CN 103575952 A CN103575952 A CN 103575952A CN 201210249032 A CN201210249032 A CN 201210249032A CN 103575952 A CN103575952 A CN 103575952A
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Abstract
The product belongs to the electric power and electronic field, and provides a laterally-arranged type measurement structure and a measurement method of current mutual inductance. A current mutual inductance element is installed within a certain distance of a side of a measured conductor, and a magnetic medium is not needed to surround a conductive cable. The laterally-arranged type measurement structure and the measurement method of current mutual inductance are not limited by the shape and the position of the conductive cable. According to the laterally-arranged type measurement structure and the measurement method of current mutual inductance, there is no magnetic saturation in the internal part of the current mutual inductance element, and measurement range is not limited by device self-power so that measurement output signals of the measurement structure and the measured current intensity are outputted according to proportion (an output characteristic curve is a straight line). According to the method and the structure, a currently adopted method that measurement of magnetic force lines around the conductive cable is utilized to represent internal current intensity of the conductive cable is surpassed. According to the laterally-arranged type measurement method of the current mutual inductance structure, the conductive cable does not need to penetrate through the center of a measurement device, and the current measurement method performs current intensity measurement by only being laterally arranged on the side of the conductive cable.
Description
Technical field
Power electronics.
Background technology
Current current sample adopts the structure of straight-through current transformer, thereby this measuring method needs electric conductor to pass problem surrounding magnetic field is quantized to reach the object that characterizes electric current from the sealing magnetic medium center of mutual inductor.
The measurement structure of this core-theaded type Current Mutual Inductance and the requirement of measuring method make the use of current transformer be subject to the restriction of conductor cable shape and position, and affiliated electric equipment size is larger.And the traditional structure of core-theaded type Current Mutual Inductance is restricted to the maximal value of tested electric current, its inner magnet sensitive element all has magnetic saturation phenomenon.The output signal strength of the core-theaded type Current Mutual Inductance structure of this sealing simultaneously can not be exported (output characteristic curve is not straight line) in consistent ratio with the size variation of tested electric current.And the capacity that conventional current mutual inductor inside needs electromagnetism to exchange is larger, its bulking value can not reduce.
Summary of the invention
The measurement structure of the side-mounted Current Mutual Inductance of NB type and measuring method, in the certain distance of tested electric conductor side, do not need magnetic medium around conductor cable.The measuring method of this side-mounted Current Mutual Inductance and measure the restriction that structure is not subject to shape and position (morpheme) of measured conductor, according to the volume and weight of the sensor own vol weight of the measurement structure of side-mounted Current Mutual Inductance and measuring method and corresponding device more traditional several times that reduced all.And measurement structure and the measuring method of NB type side Current Mutual Inductance do not have magnetic saturation, measurement range is not subject to the restriction of device self power, thereby it is measured output signal and in consistent ratio, exports (output characteristic curve is straight line) with tested strength of current.
The method is utilized the magnetic field intensity of conductor cable side and the linear relationship of the strength of current in conductor cable, with side mutual-inductance element, extracts conductor cable side point magnetic field intensity to reach the object that the strength of current sampling in conductor cable is characterized.Thereby broken through current employing conductor cable around the whole circumference magnetic line of force measurement and characterize the method for strength of current in conductor cable.
Side-mounted Current Mutual Inductance structure and measuring method need not conductor cable through the center of measuring element, only need side in cable side, to carry out the current measuring method of measuring current intensity.
Side-mounted Current Mutual Inductance measurement structure and measuring method have fundamentally facilitated the installation of Current Mutual Inductance element, are convenient to arrange flexibly check point, also make the mutual-inductance element of this non-punching from volume weight, with respect to core-theaded type, to reduce 5-8 times simultaneously.
Fig. 1 is power cable.
Fig. 2 is side-mounted Current Mutual Inductance element.
Fig. 3 is the mounting structure of side-mounted Current Mutual Inductance element.
Claims (2)
- The measurement structural defence of 1.NB type strength of current.
- The measuring method protection of 2.NB type strength of current.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210249032.6A CN103575952A (en) | 2012-07-18 | 2012-07-18 | Laterally-arranged type measurement structure and measurement method of current mutual inductance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210249032.6A CN103575952A (en) | 2012-07-18 | 2012-07-18 | Laterally-arranged type measurement structure and measurement method of current mutual inductance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103575952A true CN103575952A (en) | 2014-02-12 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210249032.6A Pending CN103575952A (en) | 2012-07-18 | 2012-07-18 | Laterally-arranged type measurement structure and measurement method of current mutual inductance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103575952A (en) |
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2012
- 2012-07-18 CN CN201210249032.6A patent/CN103575952A/en active Pending
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| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140212 |