CN103048509A - Current measuring coil for measuring current in conductor - Google Patents
Current measuring coil for measuring current in conductor Download PDFInfo
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- CN103048509A CN103048509A CN2011104207498A CN201110420749A CN103048509A CN 103048509 A CN103048509 A CN 103048509A CN 2011104207498 A CN2011104207498 A CN 2011104207498A CN 201110420749 A CN201110420749 A CN 201110420749A CN 103048509 A CN103048509 A CN 103048509A
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Abstract
The invention relates to a current measuring coil for measuring current in a conducting wire, and the current measuring coil (1) is provided with a coil winding (3) formed by a conducting material and preferably formed by a conducting wire (4). The coil winding (3) and a non-magnetic core are arranged by surrounding the conductor together. In the coil winding (3), voltage is induced through the alternating current in the conductor. In order to qualitatively improve the measuring result in the current measuring coil (1), the coil winding (3) of the current measuring coil (1) is wound for multiple turns surrounding a hole in which the conductor is arranged or through which the conductor runs.
Description
The present invention relates to a kind of current measurement coil for measuring the conductor electric current, it is with by conductive material, better for leading thread coil winding, and coil winding centers on the conductor setting that guides electric current to be measured with non-magnetic core, and can induce voltage in this coil winding by the alternating current in this conductor.
The application of known this current measurement coil according to this lubber ring principles of construction of Kenneth Rogoff in the field, laboratory.Compare with traditional current converter, this current measurement coil has sizable advantage.Measurement parameter is the voltage that induces in current measurement coil or Roger's Paderewski (Rogowski) coil, and this voltage can date back to the magnetic field that the alternating current of the conductor of flowing through produces.
Main Differences between the current converter of such current measurement coil or this lubber ring of Kenneth Rogoff and classics is that it does not have iron core.Therefore, do not have under large electric current otherwise the non-linear saturation effect that can occur.
Can realize higher measurement dynamic by means of the such Roger's Paderewski with robust structure or current measurement coil, thereby not only can measure exactly very little electric current, and can measure very large electric current, this and short circuit associate significant.By means of the respective design of current measurement coil or this lubber ring of Kenneth Rogoff, can reach from Hz until the bandwidth of MHz scope.
From the above-mentioned state of the art, task of the present invention is, so further improves the current measurement coil of aforementioned type, that is, it compared with prior art can more accurately be reached carry out more reliably current measurement.
According to the present invention, this task solves like this, and namely the coil winding of this current measurement coil is positioned at wherein or the axis in the hole that passes therethrough twines multiturn around conductor.Owing to twining multiturn with this coil winding around this hole, can realize compared with prior art significantly reducing the impact that may be caused by the external magnetic field.Current measurement coil constructed according to the invention is raised the efficiency when delivery of electrical energy and interruption (Abrechnung).They are to save cost to have created prerequisite by using digital technology.In addition, improve the security of electrical network by improved measuring technique, wherein reduced the power failure probability of electrical network.
According to a favourable embodiment, current measurement coil according to the present invention has carrier, wire is wound in coil winding around this carrier equably, and wherein wire draws back the starting point of this coil winding, and this carrier twines multiturn with coil winding around the hole of admitting conductor.Obtain thus a comparatively speaking more stable design proposal, wherein owing to twining as far as possible equably this carrier and twining the hole multiturn of admitting conductor, further suppress the impact of external magnetic field.
This carrier can be configured to wrap wire (Wickelschnur) aptly.
In addition advantageously, the wire that is configured to this coil winding is provided with insulator.
Structure according to the coil winding of current measurement coil of the present invention is comprised of feed line and loop line.As previously mentioned, this wire is drawn back the starting point of originally twining again.
When the design current measuring coil, for example determine the parameter of wrap wire, such as diameter and length, and the material of wire and diameter.Explained as top, in order to prevent short circuit when twining, this wire has insulator.
According to a kind of favourable embodiment of current measurement coil of the present invention, coil winding has the linearly extended conducting line segment that is tied with filamentary material on it as loop line, and this conducting line segment and the filamentary material that twines on it form cotton rope (Kordel); And the conducting line segment that has uniform winding as feed line, this conducting line segment are wrapped on the cotton rope that the filamentary material by the upper winding of linearly extended conducting line segment and its consists of equably, and wherein feed line and loop line are connected to each other at an end place of this cotton rope or wrap wire.
According to an effective improvement project regulation of this above-mentioned design proposal of current measurement coil of the present invention, this coil winding has many, at least two loop lines that twined by filamentary material, and it forms cotton rope or wrap wire with filamentary material; And number is wrapped in feed line on this cotton rope or the wrap wire equably corresponding to the loop line number, the winding layer that is made of filamentary material wherein is set respectively between two feed lines, wherein at an end place of this coil winding, article one, feed line is electrically connected to each other into a unit with a loop line, wherein at the other end of this coil winding, the loop line of a unit is electrically connected with the feed line of next unit, and the feed line of the loop line of last unit and first module gives over to the beginning.At this moment, the units in series that is made of with loop line the feed line of this coil winding connects.
Alternatively, this coil winding can have one and twine on line, is tied with on it feed line of filamentary material and one along certain sense of rotation equably and be wrapped in loop line on the filamentary material winding layer along opposite sense of rotation equably, wherein, this feed line and this loop line are electrically connected to each other at an end place of coil winding.
An improvement project according to above-mentioned modification, coil winding according to current measurement coil of the present invention has many, article at least two, the feed line that twines of the certain sense of rotation in edge and the loop line that twines along opposite sense of rotation, the winding layer that is made of filamentary material wherein is set respectively between adjacent feed line or loop line, wherein at an end place of this coil winding, article one, feed line and a loop line are electrically connected and are connected into a unit, wherein at the other end place of this coil winding, the units in series that is made of feed line and the loop line of being connected respectively connects, and the loop line of the feed line of first unit and last unit gives over to the beginning.
Coil winding according to current measurement coil of the present invention can spirality or winding escalator
Axis around this hole twines multiturn, and wherein this coil winding can multilayer be come around this hole.The coil winding of relative configurations can be provided with by suitable insulating material, for example, the insulator that resin, rubber, silicone (Silikon) etc. are configured to, coil winding is packed in this insulator to be fixed into or is stable.
According to the favourable embodiment of another kind, this coil winding can be with the axis winding multiturn of spirality around this hole on a plane, wherein, coil winding be not arranged on inside edge with the end of the conductor wire end of exposing, and the connection terminal of this coil winding is arranged on the outer edge of the coil winding that spirality twines.
For the structure of fixing this coil winding and protect it to avoid ectocine; advantageously; this coil winding embeds by insulating material; for example; in the disk (Scheibe) that resin, rubber, silicone etc. are made; wherein this disk has and parallel plane surface and a center pit, guides the conductor of electric current to be measured to pass this center pit afterwards.
Therefore, according to the present invention, reduce significantly the susceptibility of this current measurement coil to disturbing, this is because be not that the manufacturing of complete the zero defect various defectives and the error that determine can be offset statistically by this coil winding.
In addition, during the synthetic coil winding arrangement of coil winding Modularly of the disk of being made by insulating material when a plurality of, at least two embeddings, current measurement coil according to the present invention can be realized modular construction, and the coil winding that wherein is arranged in each disk can be connected to each other by means of connection terminal.The requirement of this lubber ring of the Kenneth Rogoff of regarding as measurement mechanism and adopting or current measurement coil and deciding, a plurality of this disks can Modularly the stacking and connection that is one another in series.Can very effectively make this current measurement coil, wherein for example can regulate by the number of modularization disk in the desired signal intensity of the output of this current measurement coil.The signal intensity of modules disk obviously depends on geometric configuration and the layout of the coil winding that arranges therein.
When making according to current measurement coil of the present invention, this coil winding also can be extruded and make, and is configured to air core coil, or places suitable material, on rubber, silicone etc.
In the embodiment that substitutes, this coil winding can can't help wire but by a gas phase spraying plating (aufdampfen) to carrier, for example the structure of the metal construction on the ceramic monolith forms.
In addition, this coil winding can also be can't help wire and is configured to by platinum structure (Platinenstruktur).
The present invention will be described in more detail according to embodiment with reference to the accompanying drawings.
In the accompanying drawing:
Fig. 1 is the schematic diagram according to the coil winding of a kind of embodiment of current measurement coil of the present invention, as to be used for the measure traverse line electric current; And
Fig. 2 is the schematic diagram according to a kind of embodiment of current measurement coil of the present invention.
According to electric current of the present invention, that current measurement coil 1 that work according to the principle of this lubber ring of Kenneth Rogoff is used for measuring in tolerance conductor 2.For this reason, current measurement coil 1 has the coil winding 3 that is made of wire 4 shown in Fig. 1 in one embodiment, and this coil winding arranges around conductor 2 with non-magnetic core.Conductor 2 in Fig. 1 not shown and along with X-direction shown in Figure 1 and coaxial extension.
When alternating current flows through the conductor 2 that arranges like this with respect to coil winding 3, in the coil winding 3 of this current measurement coil, induce size corresponding to the voltage of the strength of current in the conductor 2.
In the current measurement coil 1 according to this lubber ring principle work of Kenneth Rogoff, there is not iron core.Therewith correspondingly, eliminated the non-linear saturation effect that diminishes the measurement result degree of accuracy that under large electric current, occurs.
As can be seen from Figure 1, coil winding 35 is twined around the hole in the mode of snail in the embodiment shown, X-axis and thus the axis of conductor 2 extend at the center in this hole.Therefore, coil winding 3 centers on conductor 2 with multilayer.Coil winding 3 have uniform winding, play the conducting line segment 6 of feed line effect to a certain extent, and by twining the linearly extended conduction carrying section 7 of extending in the inner space that occurs, it plays the loop line effect to a certain extent.In Fig. 1 at coil winding 3 inner ends, that is, and hole side end place, conducting line segment 6 and the linearly extended conducting line segment 7 of uniform winding are electrically connected to each other.
The coil winding 3 of current measurement coil 1 can have owing to the reason unshowned carrier in Fig. 1 that shows.Be provided with the conducting line segment 6 of uniform winding around this carrier.At this moment, wire 4 draws the starting point of loop line circle winding 3 by rights.This carrier correspondingly twines multiturns with the coil winding 3 the same holes 5 that center on, and the conductor 2 of guide current passes this hole, and conductor is arranged on the X-axis with its axis.
The conducting line segment 6 of the uniform winding of coil winding 3 shown in Figure 1 not only, and all be provided with suitable insulator at the linearly extended conducting line segment 7 of the wire of the formation coil winding 3 shown in Fig. 1 equally.
Be constructed to a certain extent wrap wire at the unshowned carrier of Fig. 1.
In one embodiment, twine filamentary material at linearly extended conducting line segment 7 shown in Figure 1.Linearly extended conducting line segment 7 and the filamentary material that twines thereon form cotton rope jointly.Linearly extended conducting line segment 7 is as the feed line of coil winding 3.The conducting line segment 6 that plays the feed line effect of coil winding 3 is wrapped on this cotton rope equably.The conducting line segment 6 and the linearly extended conducting line segment 7 that play the uniform winding of feed line or loop line effect are electrically connected to each other at an end place of this cotton rope.
In a kind of alternate embodiments of current measurement coil 1, realized the accurate sandwich construction of explaining above.The top filamentary material of having mentioned of a plurality of linearly extended conducting line segment 7 usefulness that forms respectively the loop line of coil winding twines.At the cotton rope that forms like this conducting line segment 6 that twines equably is set, this conducting line segment 6 is twined by the filamentary material layer again.The conducting line segment 6 of uniform winding is set again on this filamentary material layer.The number of conducting line segment 6 that plays the uniform winding of feed line effect conforms to the number of linearly extended conducting line segment 7.The one filamentary material layer that twines is set respectively between the conducting line segment 6 of the uniform winding that is stacked.At an end place of the cotton rope that forms like this, between the conducting line segment 6 of each feed line or uniform winding and loop line or linearly extended conducting line segment 7, form and be electrically connected.The structure that is correspondingly combined by feed line and loop line is connected in series at the other end place of cotton rope.In other words, the loop line of the first corresponding construction is connected with the feed line of the second corresponding construction.Continue to do like this until the feed line of last corresponding construction, so that the feed line of the loop line of last corresponding construction and the first corresponding construction gives over to the beginning.
Alternatively, this coil winding can have along certain sense of rotation and is wrapped in equably the feed line on the rope and is wrapped in equably loop line on the feed line along opposite sense of rotation, wherein between feed line and loop line, arrange by filamentary material forms layer.Feed line and loop line are electrically connected to each other at the place, an end of coil winding.
Alternatively, can make said structure at double or quadruple, winding filamentary material layer thereon wherein is set respectively between adjacent feed line or the loop line.At an end place of the coil winding of this spline structure, feed line and loop line are electrically connected to each other.Place, the other end in this coil winding is connected by the units in series that feed line is connected with loop line respectively.The loop line of the feed line of the first equivalent layer or unit and last one deck or unit gives over to the beginning.
Replace the spiral coil winding 3 of in a plane, extending shown in Figure 1, the coil winding of current measurement coil 1 can also winding escalator or with the helix of injustice around the X-axis line guiding in hole 5 or twine multiturn.
In the embodiment of current measurement coil 1 shown in Figure 1, coil winding 3 is twined multiturn on spiral ground, a plane around the X-axis in hole 5.The end that the conducting line segment 6 of the uniform winding of coil winding 3 is electrically connected with linearly extended conducting line segment 7 is arranged on 5 the inside edge towards the hole of helix.The connection terminal of coil winding 3 is arranged on the outward flange of helix.
As particularly as can be seen from Figure 2, coil winding 3 can embed in the disk 8 of being made by suitable insulating material.Can consider suitable resin, rubber, silicone etc. as insulating material.Disk 8 has and this parallel plane, and the zone has hole 5 therebetween, and the conductor 2 of guide current passes from this hole.
In one embodiment, can be formed by a large amount of this disks 8 that are provided with coil winding 3 according to current measurement coil 1 of the present invention, three this disks 8 wherein are set in the embodiment shown in Figure 2.
Therefore, current measurement coil shown in Figure 2 refers to coil winding arrangement 9, and its Modularly is formed by disk of the same type 8, and each disk is respectively equipped with a kind of embodiment of coil winding 3.Connection terminal 10 is as the connection terminal that is arranged on the coil winding 3 in the disk 8.
Decide on requiring, current measurement coil 1 can be used as the coil winding arrangement 9 that the disk 8 by arbitrary number consists of and realizes, thereby, can provide the current measurement coil 1 that correspondingly adapts to and design for each operating position.By coil winding 3 being embedded the susceptibility that reduces significantly 3 pairs of interference of coil winding in the disk 8 that is formed by insulating material, this is because of being not that the scrambling that determines of the manufacturing of complete zero defect can be offset statistically by coil winding 3.
Alternatively, can extrude according to the coil winding of current measurement coil of the present invention and make.In addition, this coil winding may be embodied to and is air core coil.Can also place suitable material to coil winding, on rubber, silicone etc.
Except by the wire, this coil winding can also gas phase sprayed metal version realize, wherein for example, and can be the spraying plating of metallic vapour gas phase to ceramic monolith.
In addition, the embodiment according to current measurement coil 1 of the present invention can also be configured to coil winding the platinum structure.For the current measurement coil according to the present invention importantly, guide the conductor 2 of electric current to be measured to be centered on by the coil winding 3 of current measurement coil 1 with multilayer.Thus, reduce significantly the external magnetic field to the impact of measurement result.
Claims (15)
1. be used for measuring the current measurement coil of conductor electric current, described current measurement coil is with by conductive material, the better coil winding (3) of being made by wire (4), described coil winding arranges around conductor (2) with non-magnetic core, and in described coil winding, induce voltage by the AC energy in the described conductor (2), it is characterized in that, the described coil winding (3) of described current measurement coil (1) is positioned at wherein or the axis in the hole (5) that passes therethrough twines multiturn around described wire (2).
2. current measurement coil as claimed in claim 1, it is characterized in that, described current measurement coil has carrier, described wire (4) becomes described coil winding (3) around described carrier uniform winding, described wire (4) is drawn back the starting point of described coil winding (3), and described carrier twines multiturn with described coil winding (3) around the described hole (5) of admitting described conductor (2).
3. current measurement coil as claimed in claim 2 is characterized in that, described carrier structure becomes wrap wire.
4. such as described current measurement coil in the claims 1 to 3, it is characterized in that, the wire (4) that forms described coil winding (3) has insulator.
5. such as described current measurement coil in the claim 1 to 4, it is characterized in that, described coil winding (3) has linearly extended conducting line segment (7) as loop line, is wound with filamentary material and forms cotton rope with the filamentary material that twines at described conducting line segment (7); And the conducting line segment (6) that has uniform winding as feed line, described conducting line segment (6) is wrapped in equably by linearly extended conducting line segment (7) and is wound on the cotton rope that the filamentary material on the described conducting line segment forms, and described feed line and described loop line are connected to each other at an end place of described cotton rope or wrap wire.
6. such as described current measurement coil in the claim 1 to 5, it is characterized in that, described coil winding (3) has many, at least two loop lines that twined by filamentary material, and described loop line forms cotton rope or wrap wire with filamentary material; And number is corresponding to the feed line of uniform winding on described cotton rope or described wrap wire of loop line number, the winding layer that is made of described filamentary material is set respectively between two feed lines, each feed line of end place in described coil winding is electrically connected to each other into a unit with loop line, loop line in the unit, other end place of described coil winding is electrically connected with the feed line of next unit, and the feed line of the loop line of last unit and first module gives over to the beginning.
7. such as described current measurement coil in the claim 1 to 4, it is characterized in that, described coil winding has the certain sense of rotation in edge and is wrapped in equably feed line on the rope, that twine filamentary material on it, with the loop line that is wrapped in equably along opposite sense of rotation on the winding layer that is made of filamentary material, described feed line and described loop line are electrically connected to each other at an end place of described coil winding.
8. current measurement coil as claimed in claim 7, it is characterized in that, described coil winding has many, article at least two, the feed line that twines of the certain sense of rotation in edge and the loop line that twines along opposite sense of rotation, the winding layer that is made of filamentary material is set respectively between adjacent feed line or loop line, end place in described coil winding, each feed line and loop line are electrically connected becomes a unit, other end place in described coil winding, each units in series that is made of each feed line and the loop line that is connected with feed line connects, and the loop line of the feed line of first module and last unit gives over to the beginning.
9. such as described current measurement coil in the claim 1 to 8, it is characterized in that, described coil winding (3) twist or winding escalator ground twine multiturn around the described axis in described hole (5).
10. such as described current measurement coil in the claim 1 to 9, it is characterized in that, described coil winding (3) spirally centers on described hole (5) on a plane described axis twines multiturn, described coil winding (3) be not arranged on inside edge with the end of the conductor wire end of exposing, and the connection terminal of coil winding (3) is arranged on the outer edge of the coil winding (3) that spirality twines.
11. such as described current measurement coil in the claim 1 to 10, it is characterized in that, described coil winding (3) embeds by insulating material, for example, in the disk (8) that resin, rubber, silicone etc. are made, described disk has and parallel plane and center pit (5).
12. current measurement coil as claimed in claim 1, it is characterized in that, a plurality of, described coil winding (3) Modularly synthetic thread coil winding structure (9) in the disk (8) that at least two embeddings are made of insulating material, the coil winding (3) that is arranged in each disk (8) is connected to each other by means of connection terminal (10).
13. such as described current measurement coil in the claim 1 to 12, it is characterized in that, described coil winding is extruded and is made, is configured to air core coil or places suitable material, on rubber, silicone etc.
14. such as described current measurement coil in the claim 1 to 13, it is characterized in that, to carrier, for example the metal construction on the ceramic monolith forms described coil winding by the gas phase spraying plating, rather than is formed by wire.
15. such as described current measurement coil in the claim 1 to 13, it is characterized in that, described coil winding is configured to the platinum structure, rather than is become by wire configurations.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104207498A CN103048509A (en) | 2011-10-12 | 2011-10-12 | Current measuring coil for measuring current in conductor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104207498A CN103048509A (en) | 2011-10-12 | 2011-10-12 | Current measuring coil for measuring current in conductor |
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| CN103048509A true CN103048509A (en) | 2013-04-17 |
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| CN2011104207498A Pending CN103048509A (en) | 2011-10-12 | 2011-10-12 | Current measuring coil for measuring current in conductor |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110073225A (en) * | 2016-12-21 | 2019-07-30 | 日本碍子株式会社 | The heat resistance element of current detecting |
| CN111103450A (en) * | 2018-10-26 | 2020-05-05 | 胜美达集团株式会社 | Coil wire, current sensor component, and current sensor |
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| CN201478108U (en) * | 2009-07-29 | 2010-05-19 | 河北理工大学 | Sampling coil of electronic current transformer |
| CN201556524U (en) * | 2009-12-04 | 2010-08-18 | 深圳市创银实业有限公司 | Electronic type current transformer with PCB Rockwell coil |
| JP2011040650A (en) * | 2009-08-17 | 2011-02-24 | Toyota Central R&D Labs Inc | Rogowski coil |
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| JP2001102230A (en) * | 1999-09-29 | 2001-04-13 | Mitsubishi Electric Corp | Rogowskii coil |
| CN2689237Y (en) * | 2004-04-28 | 2005-03-30 | 邹高芝 | Coil and magnetic core assembly of current sensor without magnetic core protective cover |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110073225A (en) * | 2016-12-21 | 2019-07-30 | 日本碍子株式会社 | The heat resistance element of current detecting |
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| CN111103450A (en) * | 2018-10-26 | 2020-05-05 | 胜美达集团株式会社 | Coil wire, current sensor component, and current sensor |
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Application publication date: 20130417 |