CN200976020Y - Current divider - Google Patents
Current divider Download PDFInfo
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- CN200976020Y CN200976020Y CN 200620015334 CN200620015334U CN200976020Y CN 200976020 Y CN200976020 Y CN 200976020Y CN 200620015334 CN200620015334 CN 200620015334 CN 200620015334 U CN200620015334 U CN 200620015334U CN 200976020 Y CN200976020 Y CN 200976020Y
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- sample line
- sampling resistor
- welding position
- sample
- shunt
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Abstract
The utility model relates to an electrical measurement element, providing a current divider in order to tackle the defects of the prior art, comprising a sample resistor and four sample lines which are welded on the sample resistor; the four sample lines are arranged at the two ends and the two sides of the sample resistor; the two sample lines welded at the same end are formed to the output end of measurement in a short circuit; the area which is made by the two sample lines welded at a side and the sample resistor is the same as the area which is made by the two sample lines welded at the other side and the sample resistor. The technical proposal is adopted with four sample lines, and eliminates totally the influence of direct current magnetic field through arranging correspondingly the welding position of the sample lines, weakening remarkably the influence of the alternating magnetic field and increases the sampling precision.
Description
Technical field
The utility model relates to the electric measurement element, more particularly, relates to a kind of shunt.
Background technology
Shunt is widely used in enlarging the scope of instrument measurement electric current, can be used for current limliting, current-sharing sampling detection are done in the loops such as power supply of communication system, complete electronic set, robotization control.The critical piece of shunt is a little value resistance, and it is provided with sampling end, can control the measuring accuracy of shunt by the position of adjusting sampling end.
Fig. 1 is the structural representation of prior art tradition shunt.As shown in Figure 1, this shunt is welded with current sample line 14 and 15 on sampling resistor 16.The tradition shunt adopts two current sample line convections to sample through the electric current of sampling resistor, and the winding of current sample line and the position of placement are not all had special requirement yet.Under the normal condition, this method of sampling is less than influence, but when there is alternating electromagnetic field in the space, the current precision of using this method acquisition will be greatly affected, when the intensity of alternating magnetic field reaches hundreds of mT, adopt the trueness error of the electric energy meter of this diversion structure more can reach tens percent even up to a hundred.
Therefore, above-mentioned traditional shunt can't operate as normal in having the environment of alternating magnetic field.
Summary of the invention
The technical problems to be solved in the utility model is, at traditional shunt in the prior art can't operate as normal in having the environment of alternating magnetic field defective, a kind of modified shunt is provided.
The technical solution adopted for the present invention to solve the technical problems is: construct a kind of shunt, comprise sampling resistor, and be welded on first sample line and the 4th sample line on the described sampling resistor; The welding position of described first sample line and described the 4th sample line is the two ends of close described sampling resistor respectively; The welding position of described first sample line and described the 4th sample line lays respectively at the both sides of described sampling resistor; Also be welded with on the described shunt:
Second sample line, its welding position is near an end at the described first sample line place, and a side of described the 4th sample line, and extends the back short circuit respectively with described first sample line, constitutes first output terminal;
The 3rd sample line, its welding position is near an end at described the 4th sample line place, and a side of described first sample line, and extends the back short circuit respectively with described the 4th sample line, constitutes second output terminal;
After extending respectively, described first sample line and described the 3rd sample line or described the 4th sample line and described sampling resistor surround the area in zone, equal the area that described second sample line and described the 4th sample line or described the 3rd sample line and described sampling resistor surround the zone.
In shunt described in the utility model, before the difference short circuit,
Described first sample line extends to the welding position of described the 3rd sample line or described the 4th sample line from its weld along described sampling resistor, and extend behind described the 3rd sample line or described the 4th sample line multiple twin.
In shunt described in the utility model, before the difference short circuit,
Described second sample line extends to the welding position of described the 4th sample line or described the 3rd sample line from its weld along described sampling resistor, and extend behind described the 4th sample line or described the 3rd sample line multiple twin.
In shunt described in the utility model, before the difference short circuit,
Described first sample line and described the 3rd sample line or described the 4th sample line extend to multiple twin extension behind arbitrary position between the two welding position along described sampling resistor in the welding position separately from it respectively.
In shunt described in the utility model, before the difference short circuit,
Described second sample line and described the 4th sample line or described the 3rd sample line extend to multiple twin extension behind arbitrary position between the two welding position along described sampling resistor in the welding position separately from it respectively.
In shunt described in the utility model, before the difference short circuit,
Described first sample line and described the 3rd sample line or described the 4th sample line extend between the two welding position along described sampling resistor and extend in parallel behind arbitrary position in the welding position separately from it respectively.
In shunt described in the utility model, before the difference short circuit,
Described second sample line and described the 4th sample line or described the 3rd sample line extend between the two welding position along described sampling resistor and extend in parallel behind arbitrary position in the welding position separately from it respectively.
In shunt described in the utility model, described sampling resistor is copper-manganese resistance or constantan resistance.
The technical solution of the utility model has following beneficial effect, adopt two sample line in the alternative traditional shunt of four sample line, and to welding position work corresponding be provided with of sample line on sampling resistor, can eliminate the influence that D.C. magnetic field brings fully, significantly weaken the influence of alternating magnetic field, improve sampling precision shunt.
Description of drawings
The invention will be further described below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the structural representation of prior art tradition shunt;
Fig. 2 is the structural representation of the utility model shunt;
Fig. 3 is the synoptic diagram of the utility model shunt sample line welding position;
Fig. 4 is the structural representation of first kind of cabling mode of the utility model shunt;
Fig. 5 is the structural representation of second kind of cabling mode of the utility model shunt;
Fig. 6 is the structural representation of the third cabling mode of the utility model shunt;
Fig. 7 is the structural representation of the 4th kind of cabling mode of the utility model shunt;
Fig. 8 is the structural representation of the 5th kind of cabling mode of the utility model shunt;
Fig. 9 is the synoptic diagram of the utility model shunt installation site.
Embodiment
The shunt of the utility model introduction comprises sampling resistor and welding four sample line thereon, wherein, four sample line live apart the in twos two ends and the both sides of sampling resistor, and by being welded in the output terminal that is configured for measuring behind two sample line short circuits of end, and two sample line and sampling resistor that two sample line that are welded in a side and the sampling resistor area that surrounds the zone equals to be welded in opposite side surround regional area.Below in conjunction with accompanying drawing the technical solution of the utility model is described.
Fig. 2 is the structural representation of the utility model shunt.As shown in Figure 2, this shunt comprises sampling resistor 7, first sample line 1, second sample line 2, the 3rd sample line 3 and the 4th sample line 4.In said elements, sampling resistor 7 can adopt copper-manganese or constantan material with good resistance-temperature characteristic to make, and being different from the maximum of traditional shunt, the shunt that the utility model will be introduced is characterised in that, used four sample line, these four sample line are stranded in twos to be connected on the sampling resistor 7 of shunt.Be introduced with method for winding below in conjunction with the welding position of accompanying drawing 3 to 8 pairs of four sample line of accompanying drawing.
Fig. 3 is the synoptic diagram of the utility model shunt sample line welding position.In shunt as shown in Figure 3, first incoming end 6 links to each other with second incoming end 5 that is connected sampling resistor 7 other ends by lead 8, first sample line 1 and second sample line 2 are welded on an end of sampling resistor 7, and the 3rd sample line 3 and the 4th sample line 4 are welded on the other end of sampling resistor 7.Simultaneously, first sample line 1 and the 3rd sample line 3 are positioned at a side of sampling resistor 7, and second sample line 2 and the 4th sample line 4 are positioned at the opposite side of sampling resistor 7.
Above-mentioned four sample line are extended respectively after on being welded to sampling resistor 7, and formation first output terminal behind first sample line 1 and second sample line, 2 short circuits; Constitute second output terminal behind the 3rd sample line 3 and the 4th sample line 4 short circuits.Below the cabling mode of sample line is described in detail.
Fig. 4 is the structural representation of first kind of cabling mode of the utility model shunt.As shown in Figure 4, the 4th sample line 4 is stretched out from a side of sampling resistor 7 after its welding position A extends to the welding position D of second sample line 2 and second sample line, 2 multiple twins near sampling resistor 7; The 3rd sample line 3 is also stretched out from sampling resistor 7 the same sides after its welding position B extends to the welding position C of first sample line 1 and first sample line, 1 multiple twin near sampling resistor 7.With sampling resistor 7 is axis of symmetry, A and B symmetry, C and D symmetry.So when electric current passes through sampling resistor 7, the electric potential difference U between C and the B
CBEqual the electric potential difference U between D and the A
DA, suppose that this electric potential difference is U.
At this moment, if first sample line 1 and second sample line, 2 short circuits are formed first output terminal, the 3rd sample line 3 and the 4th sample line 4 short circuits form second output terminal, and when not having external magnetic field to disturb, electromotive force is (U between first output terminal and second output terminal
CB+ U
DA)/2=U.
According to cabling mode shown in Figure 4, the 4th sample line 4 and second sample line 2 and sampling resistor 7 surround regional F, and the 3rd sample line 3 and first sample line 1 and sampling resistor 7 surround area E, and regional F equates with the area E area.At this moment, if there is the outside alternating magnetic field of the vertical paper of direction,,, then between pad A, D, can form an electric potential difference U again with reference to formula Δ U=d Φ/dt=dB*S/dt according to the right-handed helix rule
F, simultaneously, can form an electric potential difference U at pad B, C
E, and because regional F equates that with the area E area magnetic flux that then passes two zones equates, so U
FWith U
EEqual and opposite in direction, direction is opposite, i.e. U
F=-U
ETherefore, electromotive force is ((U between first output terminal and second output terminal
CB-U
E)+(U
DA-U
F))/2=U.Hence one can see that, and by above-mentioned cabling mode, the effect of alternating magnetic field is just offset, so alternating magnetic field can not exert an influence to the measurement result of shunt.
From above-mentioned analytic process as can be seen, U
CBWhether equal U
DA, promptly whether A and B be symmetrical, and whether C and D be symmetrical, do not influence result of the present invention.For offsetting the effect of alternating magnetic field, only need U
FWith U
EEqual and opposite in direction gets final product, and guarantees that promptly regional F equates with the area E area.Below will be described other embodiment of the present invention.
Fig. 5 is the structural representation of second kind of cabling mode of the utility model shunt.Similar with cabling mode shown in Figure 4, the cabling mode among Fig. 5 also is to stretch out from a side of sampling resistor 7 behind second sample line 2 and the 4th sample line 4 multiple twins; Stretch out from the same side of sampling resistor 7 behind first sample line 1 and the 3rd sample line 3 multiple twins.The region area that the zone that the 4th sample line 4 and second sample line 2 and sampling resistor 7 surround and the 3rd sample line 3 and first sample line 1 and sampling resistor 7 surround equates.Be different from Fig. 4, the multiple twin position of second sample line 2 and the 4th sample line 4 can be at the two at the arbitrary place between the welding position on the sampling resistor 7; The multiple twin position of first sample line 1 and the 3rd sample line 3 also can be at the two at the arbitrary place between the welding position on the sampling resistor 7.Because the area in two zones equates that the effect of alternating magnetic field is just offset, therefore measurement result there is not influence.
Fig. 6 is the structural representation of the third cabling mode of the utility model shunt.As shown in Figure 6, second sample line 2 and the 4th sample line 4 are all being stretched out from a side of sampling resistor 7 behind arbitrary place multiple twin between the two place, welding position near sampling resistor 7, first sample line 1 and the 3rd sample line 3 are all stretched out in the same side from sampling resistor 7 behind arbitrary place multiple twin between the place, the two welding position near sampling resistor 7, but, with sampling resistor 7 is axle, and the welding position of first sample line 1 also is asymmetric with the welding position of second sample line 2; The welding position of the 3rd sample line 3 also is asymmetric with the welding position of the 4th sample line 4.Yet, because the region area that the zone that the 4th sample line 4 and second sample line 2 and sampling resistor 7 surround and the 3rd sample line 3 and first sample line 1 and sampling resistor 7 surround equates, therefore the effect of alternating magnetic field is just offset, and therefore measurement result is not had influence.
Fig. 7 is the structural representation of the 4th kind of cabling mode of the utility model shunt.As shown in Figure 7, second sample line 2 and weld are stretching out from a side of sampling resistor 7 behind the arbitrary place multiple twin between the welding position on the sampling resistor 7 at the two in the 3rd sample line 3 of homonymy not; First sample line 1 and weld are stretching out from the same side of sampling resistor 7 behind the arbitrary place multiple twin between the welding position on the sampling resistor 7 at the two in the 4th sample line 4 of homonymy not.This kind cabling mode forms four zones, i.e. G, H, I and J altogether; At this moment, for the effect that makes alternating magnetic field can just be offset, the area sum that the area sum that only need be positioned at territory, sampling resistor 7 one lateral areas equals sampling resistor 7 opposite side zones gets final product, and promptly G and J area sum equal H and I area sum.
Fig. 8 is the structural representation of the 5th kind of cabling mode of the utility model shunt.As shown in Figure 8, except that the multiple twin mode, four sample line also can parallel cabling.In Fig. 8, first sample line 1 and the 3rd sample line 3 are all near sampling resistor 7, stretching out from a side of sampling resistor 7 behind the parallel cabling in arbitrary position between second sample line 2 and the 4th sample line 4 welding positions, second sample line 2 is all also stretched out from the same side near sampling resistor 7 parallel cablings with the 4th sample line 4.This kind cabling mode forms three regional K, L, M.For the effect that makes alternating magnetic field can just be offset, the area sum that the area sum that only need be positioned at the zone of sampling resistor 7 one sides equals the zone of sampling resistor 7 opposite sides gets final product, and promptly K and L area sum equal M area sum.
Fig. 9 is the synoptic diagram of the utility model shunt installation site.As shown in Figure 9, first output terminal 10 that constitutes behind first sample line 1 and second sample line, 2 short circuits inserts the input end 12 of pcb board 9; Second output terminal 11 that constitutes behind the 3rd sample line 3 and the 4th sample line 4 short circuits inserts the output terminal 13 of pcb board 9.Analysis by Fig. 4 as can be known, alternating magnetic field can be cancelled out each other to the influence of electric potential that first output terminal 10 and second output terminal 11 produce, so alternating magnetic field does not have influence to the measurement result of shunt.
The above is preferred embodiment of the present utility model only, is used to illustrate the technical solution of the utility model, not in order to limit scope of the present utility model.Can draw by the drawings and specific embodiments, the shunt of the utility model introduction comprises sampling resistor and welding four sample line thereon, wherein, four sample line live apart the in twos two ends and the both sides of sampling resistor, and by being welded in the output terminal that is configured for measuring behind two sample line short circuits of end, and two sample line and sampling resistor that two sample line that are welded in a side and the sampling resistor area that surrounds the zone equals to be welded in opposite side surround regional area.Therefore, all any modifications of within spirit of the present utility model and principle, being done, be equal to and replace and improvement etc., all fall within the protection domain of the present utility model.
It more than is exactly introduction to the utility model content, adopt two sample line in the alternative traditional shunt of four sample line, and to welding position work corresponding be provided with of sample line on sampling resistor, can eliminate the influence that D.C. magnetic field brings fully, significantly weaken the influence of alternating magnetic field, improve sampling precision shunt.
Claims (9)
1, a kind of shunt comprises sampling resistor, and is welded on first sample line and the 4th sample line on the described sampling resistor; The welding position of described first sample line and described the 4th sample line is the two ends of close described sampling resistor respectively; It is characterized in that the welding position of described first sample line and described the 4th sample line lays respectively at the both sides of described sampling resistor; Also be welded with on the described shunt:
Second sample line, its welding position is near an end at the described first sample line place, and a side of described the 4th sample line, and extends the back short circuit respectively with described first sample line, constitutes first output terminal;
The 3rd sample line, its welding position is near an end at described the 4th sample line place, and a side of described first sample line, and extends the back short circuit respectively with described the 4th sample line, constitutes second output terminal;
After extending respectively, described first sample line and described the 3rd sample line or described the 4th sample line and described sampling resistor surround the area in zone, equal the area that described second sample line and described the 4th sample line or described the 3rd sample line and described sampling resistor surround the zone.
2, shunt according to claim 1 is characterized in that, before the difference short circuit,
Described first sample line extends to the welding position of described the 3rd sample line or described the 4th sample line from its weld along described sampling resistor, and extend behind described the 3rd sample line or described the 4th sample line multiple twin.
3, shunt according to claim 2 is characterized in that, before the difference short circuit,
Described second sample line extends to the welding position of described the 4th sample line or described the 3rd sample line from its weld along described sampling resistor, and extend behind described the 4th sample line or described the 3rd sample line multiple twin.
4, shunt according to claim 1 is characterized in that, before the difference short circuit,
Described first sample line and described the 3rd sample line or described the 4th sample line extend to multiple twin extension behind arbitrary position between the two welding position along described sampling resistor in the welding position separately from it respectively.
5, shunt according to claim 4 is characterized in that, before the difference short circuit,
Described second sample line and described the 4th sample line or described the 3rd sample line extend to multiple twin extension behind arbitrary position between the two welding position along described sampling resistor in the welding position separately from it respectively.
6, shunt according to claim 1 is characterized in that, before the difference short circuit,
Described first sample line and described the 3rd sample line or described the 4th sample line extend between the two welding position along described sampling resistor and extend in parallel behind arbitrary position in the welding position separately from it respectively.
7, shunt according to claim 6 is characterized in that, before the difference short circuit,
Described second sample line and described the 4th sample line or described the 3rd sample line extend between the two welding position along described sampling resistor and extend in parallel behind arbitrary position in the welding position separately from it respectively.
According to each described shunt in the claim 1 to 7, it is characterized in that 8, described sampling resistor is copper-manganese resistance or constantan resistance.
9, a kind of shunt, it is characterized in that, comprise sampling resistor and welding four sample line thereon, wherein, four sample line live apart the in twos two ends and the both sides of sampling resistor, and by being welded in the output terminal that is configured for measuring behind two sample line short circuits of end, and two sample line and sampling resistor that two sample line that are welded in a side and the sampling resistor area that surrounds the zone equals to be welded in opposite side surround regional area.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620015334 CN200976020Y (en) | 2006-10-20 | 2006-10-20 | Current divider |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620015334 CN200976020Y (en) | 2006-10-20 | 2006-10-20 | Current divider |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN200976020Y true CN200976020Y (en) | 2007-11-14 |
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ID=38902304
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620015334 Expired - Fee Related CN200976020Y (en) | 2006-10-20 | 2006-10-20 | Current divider |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN200976020Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102323459A (en) * | 2011-08-12 | 2012-01-18 | 桐乡市伟达电子有限公司 | Alternating magnetic field-resistant manganin current divider |
| CN101165496B (en) * | 2006-10-20 | 2012-02-22 | 深圳长城开发科技股份有限公司 | Flow divider |
| CN102707115A (en) * | 2012-06-05 | 2012-10-03 | 江苏林洋电子股份有限公司 | Anti-alternating magnetic field interference current divider |
| CN102854356A (en) * | 2012-09-27 | 2013-01-02 | 杭州炬华科技股份有限公司 | Circuit for resisting external magnetic field interferences by adopting dual-manganese-copper design |
| CN102981046A (en) * | 2012-12-11 | 2013-03-20 | 江苏卡欧万泓电子有限公司 | Manganese-copper sampler capable of resisting power frequency interference |
| WO2014079238A1 (en) * | 2012-11-26 | 2014-05-30 | 厦门宏发电力电器有限公司 | Electronic electric meter resistant to alternating magnetic field interferences |
-
2006
- 2006-10-20 CN CN 200620015334 patent/CN200976020Y/en not_active Expired - Fee Related
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101165496B (en) * | 2006-10-20 | 2012-02-22 | 深圳长城开发科技股份有限公司 | Flow divider |
| CN102323459A (en) * | 2011-08-12 | 2012-01-18 | 桐乡市伟达电子有限公司 | Alternating magnetic field-resistant manganin current divider |
| WO2013023504A1 (en) * | 2011-08-12 | 2013-02-21 | 浙江永泰隆电子有限公司 | Alternating magnetic field-resistant manganin current divider |
| CN102323459B (en) * | 2011-08-12 | 2013-10-23 | 桐乡市伟达电子有限公司 | Alternating magnetic field-resistant manganin current divider |
| DE112012000136B4 (en) | 2011-08-12 | 2019-02-21 | Zhejiang Yongtailong Electronic Co., Ltd. | Manganese copper shunt against alternating electromagnetic fields |
| CN102707115A (en) * | 2012-06-05 | 2012-10-03 | 江苏林洋电子股份有限公司 | Anti-alternating magnetic field interference current divider |
| CN102854356A (en) * | 2012-09-27 | 2013-01-02 | 杭州炬华科技股份有限公司 | Circuit for resisting external magnetic field interferences by adopting dual-manganese-copper design |
| CN102854356B (en) * | 2012-09-27 | 2015-08-05 | 杭州炬华科技股份有限公司 | Two copper-manganese is adopted to design the circuit of anti-external magnetic field interference |
| WO2014079238A1 (en) * | 2012-11-26 | 2014-05-30 | 厦门宏发电力电器有限公司 | Electronic electric meter resistant to alternating magnetic field interferences |
| CN102981046A (en) * | 2012-12-11 | 2013-03-20 | 江苏卡欧万泓电子有限公司 | Manganese-copper sampler capable of resisting power frequency interference |
| CN102981046B (en) * | 2012-12-11 | 2015-04-15 | 江苏卡欧万泓电子有限公司 | Manganese-copper sampler capable of resisting power frequency interference |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071114 Termination date: 20111020 |