CN1193386A - Shunt assembly for current measurement - Google Patents
Shunt assembly for current measurement Download PDFInfo
- Publication number
- CN1193386A CN1193386A CN96196375A CN96196375A CN1193386A CN 1193386 A CN1193386 A CN 1193386A CN 96196375 A CN96196375 A CN 96196375A CN 96196375 A CN96196375 A CN 96196375A CN 1193386 A CN1193386 A CN 1193386A
- Authority
- CN
- China
- Prior art keywords
- shunt
- vent diverter
- current
- connector
- diverter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005259 measurement Methods 0.000 title claims abstract description 6
- 239000000463 material Substances 0.000 claims abstract description 15
- HPDFFVBPXCTEDN-UHFFFAOYSA-N copper manganese Chemical compound [Mn].[Cu] HPDFFVBPXCTEDN-UHFFFAOYSA-N 0.000 description 8
- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 4
- 238000000926 separation method Methods 0.000 description 3
- 238000003466 welding Methods 0.000 description 3
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 229910001092 metal group alloy Inorganic materials 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 229910000896 Manganin Inorganic materials 0.000 description 1
- 102000011842 Serrate-Jagged Proteins Human genes 0.000 description 1
- 108010036039 Serrate-Jagged Proteins Proteins 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000295 complement effect Effects 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000010894 electron beam technology Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- WABPQHHGFIMREM-UHFFFAOYSA-N lead(0) Chemical group [Pb] WABPQHHGFIMREM-UHFFFAOYSA-N 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 230000000717 retained effect Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 210000001138 tear Anatomy 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
- G01R1/203—Resistors used for electric measuring, e.g. decade resistors standards, resistors for comparators, series resistors, shunts
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/20—Modifications of basic electric elements for use in electric measuring instruments; Structural combinations of such elements with such instruments
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R1/00—Details of instruments or arrangements of the types included in groups G01R5/00 - G01R13/00 and G01R31/00
- G01R1/44—Modifications of instruments for temperature compensation
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
A shunt assembly for current measurement is formed of a shunt element (12) of substantially cylindrical form and of ZTC material having a pair of current connectors in the form of flat strips (10, 11) attached to its ends. Preferably sensing connectors (13, 14) of the same ZTC material are connected to the ends of the shunt element through holes in the connectors. The sensing connectors may form part of a continuous wire passing through an axial hole through the shunt element. Alternatively, they may be formed as integral extensions of the shunt element.
Description
The present invention is about current measurement, especially about current diverter.
The standard technique of measuring electric current be with electric current by known resistance resistor and measure the voltage drop of crossing resistor.Therefore electric current is effectively measured by voltage measuring apparatus or shunt resistance circuit, so this resistance is referred to as shunt.Shunt has 4 terminals or joint, and two end connectors are in order to measure the electric current by them, and two joints (usually near current joint) are measured the voltage drop that is caused by electric current in addition.Latter two terminal is called reads terminal or Kai Erfen (Kelvin) terminal.
The connection of reading terminal and shunt is with relevant with a hot electrical effect (suppose this connector use the material different with separation vessel to make).Because the thermal effect (being assumed to big electric current) of the variation of environment temperature and measurement electric current, the temperature of shunt will change; Current flow heats can lag behind owing to the thermal capacity of separation vessel.For fear of temperature sensitivity, so two connectors adopt same material to make usually.
In order accurately to measure electric current, shunt must have given value.Must accurately control the shunt value for this reason.The voltage measuring value that is converted to current value by suitable calculating is enough to accurately measure the branch flow valuve then.
This shunt must be stable.In order to have suitable low resistance, adopt metal alloy to make shunt usually, the resistance of metal alloy is higher than good conductor but is quite low.Unsettled main cause is a temperature variation in this shunt.Adopted a kind of alloy with zero-temperature coefficient (ZTC) of resistance for this reason.
Material can be expressed as the polynomial function of temperature with the resistivity of variation of temperature, linearity range is normally main, its coefficient is exactly that the temperature coefficient of material resistance has the coefficient (if temperature range is very big, they just have Special Significance) that progressively reduces than high-order term.Yet the coefficient of having developed linearity range now is zero material substantially.Known this class alloy is called as copper-manganese, and it contains 83～85% Cu, 10～13% Mn and 4% Ni, and the leading portion of its resistivity function is a secondary, resistivity is roughly constant on basic temperature range.Existing other material such as Ze Laning (Zeranin), their resistivity on very big temperature range is constant, concerning Ze Laning (Zeranin), the linearity of its resistivity function and quadratic term are zero, and therefore the leading portion in its resistivity function is three times.
To the further requirement of precision is that the voltage of shunt should have linear characteristic to electric current.Because concerning a general shunt, the distribution of current by the shunt body only changes slightly with size of current, and the result is that Ohm law is to be similar to.This phenomenon is called as " electric current gathering ".The prior art that overcomes this effect comprises makes sine or serrate with vent diverter, and adopts some readout contacts to come average because electric current is assembled the change in voltage that causes.
The physical size of separation vessel also can propose some requirement.Concerning reading big electric current, will be bigger to the electric current web member of shunt, the xsect magnitude can reach several mm
2, this just requires the sectional dimension of shunt roughly similar, also requires the length of shunt to reach several mm, and the short restive precision of length also can form to hold from fragrant and connect, and length can cause the big shunt of an inconvenience than length.
The purpose of this invention is to provide a kind of improved shunt.
According to the present invention, a kind of diverter assembly that is used to measure electric current is provided, it is characterized in that it comprises basic be cylindrical shape and the vent diverter made by the ZTC material, the current connector that has a pair of flat slat shape in its end.Same ZTC material is made reads connector is connected to diverter element by the hole on the connector end.
A specific use of current diverter is to be used in the block terminal, and wherein some input cables are imported some output cables.Typical block terminal comprises the connector of some flat slat shapes or bus, and they are made of copper usually, and in order to input end is linked output terminal, their path has certain angle or for zigzag.The current diverter that is included in the bus allows electric current to pass its also standby current.
General diverter element has the cross section same with the copper slat usually, and these slats are in the same plane usually.It is very important having good (that is stable) connection between vent diverter and the copper slat that is attached thereto, adopts the EBW (electron beam welding) connection to connect usually.This is just in the lower limit of having set a reality on the length of vent diverter (in the 2mm scope), and then sets the lower limit of a reality aspect shunt resistance.Concerning some purposes, require shunt resistance very low (for example in 70 μ Ω scopes), it is inaccessiable adopting this technology.
In addition, if the copper slat is in the right angle, may require vent diverter is positioned on their confluce (, being connected on the lateral margin of another slat end) with extending to form of a slat end.Yet the current arrangements by this vent diverter is asymmetric, and the current density ratio of shunt inside is outside wants big.So this general layout can produce current gathering effect and resistance changes with electric current.
In the present invention, yes for the slat of formation bus in different planes, the length of their biasing vent diverters.If two slats must be forwarded on the common plane, can be with a slat bending.Yet require two slats to be on the different planes under many circumstances, the present invention has changed the plane between two slats automatically, and is therefore especially suitable to this situation.Size by suitable selection vent diverter can be regulated interplanar distance in very wide scope.Be being connected of two other slat and vent diverter end to separate that therefore two slats can be set the angle that needs mutually for, for example in line or become a right angle.
Shunt of the present invention is easy to make, and cost is low and precision is high.
Describe shunt assembly of the present invention with exemplary forms below with reference to accompanying drawings, describing further feature of the present invention by these will be clearer.
Fig. 1 is the schematic perspective view of shunt assembly,
Fig. 2 is the sectional view of Fig. 1 shunt assembly,
Fig. 3 is the skeleton view of the vent diverter of remodeling.
Referring to Fig. 1, shunt assembly comprises a pair of slat 10 and 11, and slat has the ZTC vent diverter 12 that is connected between them.Just as shown in the figure, slat 10 and 11 is in different but in the plane that is parallel to each other, the axle of vent diverter 12 is perpendicular to the plane of slat.The angle of two slats shown in the figure is 90 °, and obviously, the angle between them can be that any value (comprises 0 °, in line).For given satisfactory shunt resistance, the diameter by suitable selection vent diverter can be regulated the distance between two planes in rational limit.The voltage that (remain constant for making resistance, the diameter of vent diverter should increase by the square root of its length) crosses vent diverter is read joint 12 and 13 by two and is read.These two joints must contact with the end of vent diverter.The disk with protrusion joint that employing is retained between vent diverter 12 and slat 10 and 11 ends can form such contact.Yet preferably constitute these contacts by the center, end that is connected to vent diverter.Therefore, read joint is connected to vent diverter by the hole 15 and 16 (Fig. 2) of passing slat 10 and 11 end.
Reading joint can make with any suitable material, and can be connected on the end of vent diverter, yet preferably they are inserted in the hole of vent diverter end, also preferably adopt copper-manganese (promptly with the same material of vent diverter) to make, the length of single manganin wire is passed the axial hole of the whole length of vent diverter as shown in Figure 2.The part lead that works in vent diverter becomes the part of vent diverter.Also can reduce heat-electrical effect with reading joint with the same material of vent diverter.
Fig. 3 represents the vent diverter of another kind of form, it be have the integral joint 13 of stretching out ' and 14 from its end ' cylinder 12 '.
Employing add simple scolder and the heating method, that is the appropriate area of assembly coat soldering paste and the heating method the various elements of shunt assembly can be welded together.We find, do to make assembly have high stable performance like this.The surface that need weld together is the end of vent diverter and the binding face that constitutes the slat of bus, the hole and the hole connecting lead wire part of passing vent diverter.We also find, no matter whether the hole 15 and 16 in the slat fills scolder, layout can allow that generation is as quality problems such as failure weldings like this.
We have found that this shunt assembly is generally the electrical property that all has high stable on the scope of 200mA～100A at electric current.The diameter of copper-manganese bar selected becoming usually can be complementary with the survey range of current.If diameter is very little, can measure very little electric current.Under limiting case, same copper-manganese bar or line can be used as divert shunt resistor, can be used as again and read joint.If electric current is very big, can adopt many in parallel bars, available one root is read joint, also full conduct connect together read joint (or get it and export mean value).
Near center () current arrangements partly by vent diverter is seemingly well-proportioned, but may have very complicated pattern by the end of vent diverter and near the current arrangements the bus part.Yet the influence that no matter does not have big electric current to assemble or have electric current to assemble, all balance almost.
As above-mentioned, the objective of the invention is to obtain a stable performance rather than accurately determine a value.By the existing copper-manganese bar of vent diverter is cut into suitable length, can reach 1～5% precision.(need to measure the diameter of copper-manganese bar rather than use high-precision nominal value, this is that diameter will increase when extrusion die weares and teares because the copper-manganese bar is formed by extruding usually).If yet can accurately control the diameter of copper-manganese bar, can obtain very high precision, it is that the precision of 10 μ m resistance is about about 0.1% that the precision of diameter can control to error.The change of welding etc. is also to a bit influence of precision.
If desired, also vent diverter can be ground after manufacturing a little to adjust its value.Yet this value can accurately be measured usually, and can be used for obtaining the precise current value by measuring the magnitude of voltage of crossing shunt.
Claims (5)
1. shunt assembly that is used for current measurement is characterized in that: it comprises basic be cylindrical shape and the vent diverter (2) made by the ZTC material, the current connector that has a pair of flat slat (10,11) shape in its end.
2. according to the shunt assembly of claim 1, it is characterized in that the hole that connector (13,14) passes on the current connector (10,11) of reading of same ZTC material is connected on the end of vent diverter.
3. according to the shunt assembly of claim 2, it is characterized in that reading connector (14,15) and constitute the part that the axially extending bore that passes vent diverter (12) (among Fig. 2 17) connects lead.
4. according to the shunt assembly of claim 2, it is characterized in that reading the whole extension that connector (14,15) is made vent diverter (Fig. 3).
In the spiritual scope of international convention (Paris Convention) 4H bar here specially disclosed any novelty with creative feature or these combination of features.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GBGB9513500.0A GB9513500D0 (en) | 1995-07-03 | 1995-07-03 | Shunt for current measurement |
| GB9513500.0 | 1995-07-03 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1193386A true CN1193386A (en) | 1998-09-16 |
Family
ID=10777041
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN96196375A Pending CN1193386A (en) | 1995-07-03 | 1996-07-03 | Shunt assembly for current measurement |
Country Status (15)
| Country | Link |
|---|---|
| EP (1) | EP0836710A1 (en) |
| JP (1) | JPH11508996A (en) |
| KR (1) | KR19990028577A (en) |
| CN (1) | CN1193386A (en) |
| AU (1) | AU6312396A (en) |
| CA (1) | CA2226107A1 (en) |
| CZ (1) | CZ424097A3 (en) |
| GB (1) | GB9513500D0 (en) |
| HU (1) | HUP9900189A3 (en) |
| IL (1) | IL123180A0 (en) |
| NO (1) | NO980014L (en) |
| PL (1) | PL324404A1 (en) |
| SK (1) | SK898A3 (en) |
| WO (1) | WO1997002494A1 (en) |
| ZA (1) | ZA965653B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109074925A (en) * | 2016-05-24 | 2018-12-21 | Koa株式会社 | The mounting structure of shunt resistance device and shunt resistance device |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1278069A1 (en) * | 2001-07-20 | 2003-01-22 | ENSECO GmbH | Low ohmic measuring resistor |
| FR2904425B1 (en) * | 2006-07-31 | 2008-12-05 | Commissariat Energie Atomique | IMPROVED CURRENT SENSOR WITH ALTERNATIVE MAGNETIC EXCITATION |
| US8981762B2 (en) * | 2011-09-19 | 2015-03-17 | General Electric Company | Apparatus and method for improved current shunt sensing |
| JP6854143B2 (en) | 2017-02-15 | 2021-04-07 | Koa株式会社 | Current detector using shunt resistor and shunt resistor |
| EP3527995B1 (en) | 2018-02-20 | 2023-01-25 | Fico Triad, S.A. | Shunt resistor and measurement system |
| EP4435433A1 (en) * | 2023-03-20 | 2024-09-25 | TE Connectivity Solutions GmbH | Busbar assembly for measuring an electric current between two busbars |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4001684A (en) * | 1975-09-10 | 1977-01-04 | Fritts David H | Current measuring shunt |
| FR2659177B1 (en) * | 1990-03-01 | 1992-09-04 | Merlin Gerin | CURRENT SENSOR FOR AN ELECTRONIC TRIGGER OF AN ELECTRIC CIRCUIT BREAKER. |
| GB9120003D0 (en) * | 1991-09-19 | 1991-11-06 | Ampy Automation Digilog | Improvements in and relating to current devices |
| FR2701590B1 (en) * | 1993-02-15 | 1995-04-21 | Sagem | Resistive current measurement elements and connection and measurement modules with application. |
-
1995
- 1995-07-03 GB GBGB9513500.0A patent/GB9513500D0/en active Pending
-
1996
- 1996-07-03 WO PCT/GB1996/001587 patent/WO1997002494A1/en not_active Application Discontinuation
- 1996-07-03 PL PL96324404A patent/PL324404A1/en unknown
- 1996-07-03 AU AU63123/96A patent/AU6312396A/en not_active Abandoned
- 1996-07-03 CN CN96196375A patent/CN1193386A/en active Pending
- 1996-07-03 KR KR1019970709898A patent/KR19990028577A/en not_active Application Discontinuation
- 1996-07-03 JP JP9504919A patent/JPH11508996A/en not_active Ceased
- 1996-07-03 HU HU9900189A patent/HUP9900189A3/en unknown
- 1996-07-03 CA CA002226107A patent/CA2226107A1/en not_active Abandoned
- 1996-07-03 ZA ZA9605653A patent/ZA965653B/en unknown
- 1996-07-03 CZ CZ974240A patent/CZ424097A3/en unknown
- 1996-07-03 SK SK8-98A patent/SK898A3/en unknown
- 1996-07-03 EP EP96922138A patent/EP0836710A1/en not_active Withdrawn
- 1996-07-03 IL IL12318096A patent/IL123180A0/en unknown
-
1998
- 1998-01-02 NO NO980014A patent/NO980014L/en unknown
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109074925A (en) * | 2016-05-24 | 2018-12-21 | Koa株式会社 | The mounting structure of shunt resistance device and shunt resistance device |
| CN109074925B (en) * | 2016-05-24 | 2020-11-10 | Koa株式会社 | Shunt resistor and mounting structure thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| IL123180A0 (en) | 1999-03-12 |
| SK898A3 (en) | 1998-12-02 |
| AU6312396A (en) | 1997-02-05 |
| GB9513500D0 (en) | 1995-09-06 |
| CA2226107A1 (en) | 1997-01-23 |
| NO980014D0 (en) | 1998-01-02 |
| ZA965653B (en) | 1998-05-04 |
| HUP9900189A2 (en) | 1999-05-28 |
| WO1997002494A1 (en) | 1997-01-23 |
| KR19990028577A (en) | 1999-04-15 |
| NO980014L (en) | 1998-02-24 |
| PL324404A1 (en) | 1998-05-25 |
| EP0836710A1 (en) | 1998-04-22 |
| JPH11508996A (en) | 1999-08-03 |
| HUP9900189A3 (en) | 1999-11-29 |
| CZ424097A3 (en) | 1998-05-13 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |