CN1545106A - Precision shunt resistor and manufacturing method thereof - Google Patents
Precision shunt resistor and manufacturing method thereof Download PDFInfo
- Publication number
- CN1545106A CN1545106A CNA031387721A CN03138772A CN1545106A CN 1545106 A CN1545106 A CN 1545106A CN A031387721 A CNA031387721 A CN A031387721A CN 03138772 A CN03138772 A CN 03138772A CN 1545106 A CN1545106 A CN 1545106A
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- China
- Prior art keywords
- copper
- manganese
- shunt resistor
- red copper
- temperature coefficient
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 20
- 239000010949 copper Substances 0.000 claims abstract description 26
- 229910052802 copper Inorganic materials 0.000 claims abstract description 25
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 24
- 238000003466 welding Methods 0.000 claims abstract description 18
- 230000004927 fusion Effects 0.000 claims abstract description 12
- 230000007704 transition Effects 0.000 claims abstract description 11
- 229910000881 Cu alloy Inorganic materials 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims abstract description 8
- HPDFFVBPXCTEDN-UHFFFAOYSA-N copper manganese Chemical compound [Mn].[Cu] HPDFFVBPXCTEDN-UHFFFAOYSA-N 0.000 claims description 23
- 238000010894 electron beam technology Methods 0.000 claims description 18
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000004080 punching Methods 0.000 claims description 3
- 229910000896 Manganin Inorganic materials 0.000 abstract description 2
- 238000009434 installation Methods 0.000 abstract 1
- 239000000463 material Substances 0.000 description 6
- 239000012459 cleaning agent Substances 0.000 description 2
- 239000000356 contaminant Substances 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 239000011572 manganese Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 210000001503 joint Anatomy 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
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Abstract
The invention provides a precision shunt resistor and its producing method, and it is composed of a resistor body and a bus bar made of red copper plate, and it has the character: it adopts a manganin plate with a temperature coefficient less than 20ppm as the resistor body and there is a transition manganin-red copper alloy band with temperature coefficient less than 50ppm, formed by electronic beam welding and fusion, between the resistor and the bus bar. There are installation holes and a voltage end. It has the advantages of low temperature coefficient, high reliability, heavy current rating, small bulk, convenient use, etc. Its producing method has a few production procedures, and high production efficiency, convenient for automatic production and at the same time can effectively assure it has better thermal stability and very high reliability.
Description
Affiliated technical field
The invention belongs to a kind of basic electric elements in the electricity field and its production method, particularly a kind of accurate shunt resistor and production method thereof.
Technical background
Shunt resistor is widely used in also can be used as the critical piece of current sensor in the various instrument and meters that digital watt-hour meter, high-accuracy test instrumentation and all measure, take a sample, shunt electric current.The previous low conventional, electric-resistance device of resistance that adopts is made shunt resistor.Their shortcoming is that poor heat stability, precision are low, when passing through bigger electric current on the shunt resistor, on resistor, produce bigger heat, this heat can not distribute soon, thereby resistance can change a lot, cause poor stability, precision low, the supporting use of instrument, instrument that can not be higher with precision.For addressing these problems, the patent No. is the patent of " high-accuracy shunt resistor " for " 92218841.6 " title, a kind of shunt resistor of being made up of resistance wire, resistance wire lead-in wire, housing, inserts etc. has been proposed, its feature is to adopt the many resistance wires that temperature coefficient is lower, in parallel, be welded on and constitute the shunt resistance body on the bus-bar, put it into again in the housing, in housing, insert the filler of good heat dispersion performance, form the higher relatively shunt resistor of precision.This shunt resistor mainly is at the design of the temperature coefficient of shunt resistor, the resistance wire that constitutes resistive element is realized being connected by silver soldering with bus-bar, though the thermal stability than conventional, electric-resistance improves, but the shunt resistor of this structure exists that volume rated current big, that can pass through is less, thermal stability and reliability are still not high enough; The production method of this accurate shunt resistor of while, various, the main dependence of operation is hand-manipulated, production efficiency is lower.
Summary of the invention
The object of the present invention is to provide a kind ofly have that temperature coefficient is low, reliability is high, accurate shunt resistor that Heat stability is good, the rated current that can pass through are bigger and the method for this accurate shunt resistor of production that operation is less, production efficiency is high.
Purpose of the present invention adopts following technical scheme to finish: accurate shunt resistor, form by the bus-bar that resistive element and employing copper plate are made, its feature is that described resistive element adopts temperature coefficient to be lower than the copper-manganese plate of 20ppm, between resistive element and bus-bar, there is the temperature coefficient that forms by the electron beam welding fusion to be lower than transition copper-manganese-red copper alloy band of 50ppm, on bus-bar, has installing hole and voltage output end.Produce the method for this accurate shunt resistor, carry out as follows:
(1) select temperature coefficient to be lower than the copper-manganese band red copper band identical of 20ppm with thickness, the parallel vacuum electron beam welding machine of putting into, its abutment joint is carried out the vacuum electron beam welding, make the red copper of joint, transition copper-manganese-red copper alloy band that copper-manganese fusion formation temperature coefficient is lower than 50ppm, thereby make red copper-copper-manganese-red copper bimetal band;
(2) red copper-copper-manganese-red copper bimetal band is gone out accurate shunt resistor with mould punching.Accurate shunt resistor provided by the present invention, owing to adopted the copper-manganese plate to do resistive element, make the rated current of passing through increase greatly, because the temperature coefficient of copper-manganese plate is lower than 20ppm, the temperature coefficient that forms by the electron beam welding fusion between resistive element and bus-bar is lower than 50ppm transition copper-manganese-red copper alloy band, guaranteed that accurate shunt resistor has lower temperature coefficient, simultaneously, the reliability that makes bus-bar be connected with resistive element increases greatly, the electric current of importing from the installing hole of bus-bar, can flow through resistive element from bus-bar by the copper-manganese of the transition between resistive element and the bus-bar-red copper alloy band equably, significantly reduced the contact resistance between resistive element and the bus-bar, further improved thermal stability, and having dwindled the volume of shunt resistor, volume only is about 1/2 of a prior art, because installing hole directly is set on bus-bar, make shunt resistor and instrument, connection between the instrument, very simple.Simultaneously, owing to adopted this structure, also saved material widely.
Because the copper-manganese band of having selected temperature coefficient to be lower than 20ppm has guaranteed that the accurate shunt resistor of being produced has lower temperature coefficient, because the vacuum electron beam welding is to utilize the high energy strong current electron beam bombardment weldment abutment joint that produces in the vacuum electronic rifle, when high-velocity electrons and weldment bump, send its kinetic energy to weldment, this kinetic energy converts heat energy to rises butt weld district temperature, the weldment commissure fusion of butt joint is because electron beam energy is high, power density can reach 10
9W/cm
2The beam spot diameter is little, the depth of fusion of weld seam is big with the ratio of weld width, can reach 20: 1, therefore, adopt the vacuum electron beam welding can obtain the unrivaled quality weld of any welding method, thereby make joint fusion formation temperature coefficient be lower than transition copper-manganese-red copper alloy band of 50ppm, make red copper-copper-manganese-red copper bimetal band, this bimetal band is become with mould punching: middle copper-manganese material is a resistive element again, the red copper material of its both sides is bus-bars, has the accurate shunt resistor of installing hole and voltage output end on bus-bar.Compared with prior art, this production method operation reduces more than 1/2, and production efficiency improves more than 20 times, can realize automated production, can guarantee effectively that the accurate shunt resistor of being produced has thermal stability and very high reliability preferably simultaneously.
Accurate shunt resistor provided by the present invention has reliability height, Heat stability is good, temperature coefficient rated current low, that can pass through is big, volume is little, easy to use, advantage such as economical with materials to greatest extent, the method of producing this accurate shunt resistor has the advantage that production process is few, production efficiency is high, be convenient to automated production, can guarantee effectively that the accurate shunt resistor of being produced has thermal stability and very high reliability preferably simultaneously.
Description of drawings
Fig. 1 is the structural representation of an embodiment of accurate shunt resistor provided by the present invention;
Fig. 2 is the top view of embodiment one;
Fig. 3 is the partial sectional view of Fig. 2;
Fig. 4 makes the used bimetal band that is formed through electron beam welding by copper belt and copper-manganese band of accurate shunt resistor;
Fig. 5 is the sectional view of bimetal band shown in Figure 4.
1 is the bus-bar of doing with red copper among Fig. 1, Fig. 2, Fig. 3, and 2 are the resistive element with the making of copper-manganese plate, and 3 is between bus-bar and the resistive element, and by the low-temperature coefficient transition manganin district that the electron beam welding fusion forms, 4 is installing hole, and 5 is voltage output end.Among Fig. 4, Fig. 51 for the red copper band of making bus-bar, 2 for making the copper-manganese band of resistive element, 3 low-temperature coefficient transition copper-manganese red copper alloy bands for red copper band and copper-manganese band are formed after the electron beam welding fusion.
Embodiment
The embodiment of accurate shunt resistor provided by the present invention and production method thereof is as follows: width and the thickness of at first choosing the copper-manganese band according to resistance, the rated current of shunt resistor, the composition of copper-manganese is that Mn is 11%-13%, Ni is 2%-5%, remainder is Cu, temperature coefficient is lower than 20ppm, choose the red copper band identical again with the copper-manganese thickness of strip, with cleaning agent copper-manganese band and red copper band are carried out clean, remove surface and oil contaminant, the two parallel is put into vacuum electron beam welding machine, is 10 in vacuum degree
-2-10
-4Pa, anode voltage is 30-150KV, electronic beam current is 10mA-1A, focal diameter is less than carrying out the vacuum electron beam welding under the condition of 1mm, the focal position of electronic beam current is at 1/3 place of distance weldment surface thickness of strip, make the red copper of joint, copper-manganese fusion formation temperature coefficient is lower than transition copper-manganese-red copper alloy band of 50ppm, make red copper-copper-manganese-red copper bimetal band, selecting die stamping to go out middle copper-manganese material by designing requirement then is resistive element, the red copper material of its both sides is bus-bars, on confluxing, have the accurate shunt resistor of installing hole and voltage output end, also can adopt metal cutting to change the thickness of resistive element, thereby adjust resistance value.The composition of copper-manganese is Mn:12% in the embodiment of the invention, Ni:4%, Cu: surplus, temperature coefficient are 10ppm, and thickness is 1.2mm, width is 5.2mm, the thickness of copper belt is 1.2mm, and width is 17.5mm, the two surface is cleaned with cleaning agent removed surface and oil contaminant, walking abreast and put into vacuum electron beam welding machine, is 10 in vacuum degree
-3Pa, anode voltage are that 30-150KV, electronic beam current are that 100mA, focal diameter are less than carrying out the vacuum electron beam welding under the condition of 1mm, the focal position of electronic beam current is at 1/3 place of distance weldment surface thickness of strip, form the bimetal band of red copper-copper-manganese-red copper as shown in Figure 4, use die stamping then, form accurate shunt resistor, adopt metal cutting that the thickness of resistive element is adjusted into 0.7mm again, make accurate shunt resistor as shown in Figure 1, its temperature coefficient is lower than 50ppm, rated current is 40A, and volume only is 1/2 of a prior art.
Claims (3)
1, a kind of accurate shunt resistor, form by the bus-bar that resistive element and employing copper plate are made, it is characterized in that described resistive element adopts temperature coefficient to be lower than the copper-manganese plate of 20ppm, has the temperature coefficient that forms by the electron beam welding fusion to be lower than transition copper-manganese-red copper alloy band of 50ppm between resistive element and bus-bar.
2, accurate shunt resistor according to claim 1 is characterized in that having installing hole and voltage output end on bus-bar.
3, a kind of method of accurate shunt resistor of production claim 1 is characterized in that this production method carries out as follows:
(1) select temperature coefficient to be lower than copper-manganese band red copper band parallel the put into vacuum electron beam welding machine identical of 20ppm with thickness, abutment joint to two kinds of bands carries out the vacuum electron beam welding, make the red copper of joint, transition copper-manganese-red copper alloy band that copper-manganese fusion formation temperature coefficient is lower than 50ppm, thereby make red copper-copper-manganese-red copper bimetal band;
(2) red copper-copper-manganese-red copper bimetal band is gone out accurate shunt resistor with mould punching.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031387721A CN1319078C (en) | 2003-07-09 | 2003-07-09 | Precision shunt resistor and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031387721A CN1319078C (en) | 2003-07-09 | 2003-07-09 | Precision shunt resistor and manufacturing method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1545106A true CN1545106A (en) | 2004-11-10 |
| CN1319078C CN1319078C (en) | 2007-05-30 |
Family
ID=34323791
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031387721A Ceased CN1319078C (en) | 2003-07-09 | 2003-07-09 | Precision shunt resistor and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1319078C (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102414765A (en) * | 2009-03-19 | 2012-04-11 | 韦沙戴尔电子公司 | Metal strip resistor for mitigating the effects of thermoelectric force |
| CN102773615A (en) * | 2011-07-25 | 2012-11-14 | 桐乡市伟达电子有限公司 | Electronic type electric energy meter shunt bimetal strip of and welding method thereof |
| CN105957669A (en) * | 2016-06-22 | 2016-09-21 | 陕西宝成航空仪表有限责任公司 | Method for finishing linear precision of metal film or metal foil potentiometer |
| WO2016175116A1 (en) * | 2015-04-28 | 2016-11-03 | Koa株式会社 | Current detection device |
| JP2016206137A (en) * | 2015-04-28 | 2016-12-08 | Koa株式会社 | Current detection device |
| CN106981680A (en) * | 2015-12-23 | 2017-07-25 | 罗伯特·博世有限公司 | Conductive measurement layer for measuring potential difference |
| CN107533891A (en) * | 2015-05-19 | 2018-01-02 | Koa株式会社 | Current sensing means |
| CN108646069A (en) * | 2018-04-26 | 2018-10-12 | 李秀才 | 6 ~ 630A direct-type intelligent electric meters |
| TWI645423B (en) * | 2018-03-14 | 2018-12-21 | 國巨股份有限公司 | Method for manufacturing shunt resistor |
| TWI645424B (en) * | 2018-03-26 | 2018-12-21 | 國巨股份有限公司 | Method for manufacturing shunt resistor |
| CN111133321A (en) * | 2018-03-28 | 2020-05-08 | 株式会社Lg化学 | Shunt resistor and device for detecting current including shunt resistor |
| CN112547908A (en) * | 2020-11-16 | 2021-03-26 | 深圳市业展电子有限公司 | U-shaped shunt terminal processing technology |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103137280B (en) | 2011-11-24 | 2015-12-16 | 乾坤科技股份有限公司 | Manufacturing method of resistor |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3379240B2 (en) * | 1994-10-13 | 2003-02-24 | 富士電機株式会社 | Four-terminal shunt resistor |
| CN2384225Y (en) * | 1999-07-08 | 2000-06-21 | 华立集团有限公司 | Electronic electric energy meter current divider |
| CN2634608Y (en) * | 2003-07-09 | 2004-08-18 | 彭德龙 | Precision shunt resistor |
-
2003
- 2003-07-09 CN CNB031387721A patent/CN1319078C/en not_active Ceased
Cited By (24)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102414765A (en) * | 2009-03-19 | 2012-04-11 | 韦沙戴尔电子公司 | Metal strip resistor for mitigating the effects of thermoelectric force |
| CN103871699A (en) * | 2009-03-19 | 2014-06-18 | 韦沙戴尔电子公司 | Metal strip resistor for mitigating effects of thermal emf |
| CN102773615A (en) * | 2011-07-25 | 2012-11-14 | 桐乡市伟达电子有限公司 | Electronic type electric energy meter shunt bimetal strip of and welding method thereof |
| CN102773615B (en) * | 2011-07-25 | 2015-05-20 | 桐乡市伟达电子有限公司 | Electronic type electric energy meter shunt bimetal strip of and welding method thereof |
| JP2016206137A (en) * | 2015-04-28 | 2016-12-08 | Koa株式会社 | Current detection device |
| WO2016175116A1 (en) * | 2015-04-28 | 2016-11-03 | Koa株式会社 | Current detection device |
| JP2016206138A (en) * | 2015-04-28 | 2016-12-08 | Koa株式会社 | Current detection device |
| CN107533087A (en) * | 2015-04-28 | 2018-01-02 | Koa株式会社 | Current sensing means |
| US10641798B2 (en) | 2015-04-28 | 2020-05-05 | Koa Corporation | Current detection device having a fixing portion formed in a wiring member |
| CN107533891B (en) * | 2015-05-19 | 2019-12-17 | Koa株式会社 | Current detection device |
| CN107533891A (en) * | 2015-05-19 | 2018-01-02 | Koa株式会社 | Current sensing means |
| US10473695B2 (en) | 2015-05-19 | 2019-11-12 | Koa Corporation | Current detection device |
| CN106981680A (en) * | 2015-12-23 | 2017-07-25 | 罗伯特·博世有限公司 | Conductive measurement layer for measuring potential difference |
| CN106981680B (en) * | 2015-12-23 | 2021-12-31 | 罗伯特·博世有限公司 | Conductive measurement layer for measuring potential differences |
| CN105957669A (en) * | 2016-06-22 | 2016-09-21 | 陕西宝成航空仪表有限责任公司 | Method for finishing linear precision of metal film or metal foil potentiometer |
| TWI645423B (en) * | 2018-03-14 | 2018-12-21 | 國巨股份有限公司 | Method for manufacturing shunt resistor |
| US10839991B2 (en) | 2018-03-14 | 2020-11-17 | Yageo Corporation | Method for manufacturing shunt resistor |
| TWI645424B (en) * | 2018-03-26 | 2018-12-21 | 國巨股份有限公司 | Method for manufacturing shunt resistor |
| US10818418B2 (en) | 2018-03-26 | 2020-10-27 | Yageo Corporation | Method for manufacturing shunt resistor |
| CN111133321A (en) * | 2018-03-28 | 2020-05-08 | 株式会社Lg化学 | Shunt resistor and device for detecting current including shunt resistor |
| US11320490B2 (en) | 2018-03-28 | 2022-05-03 | Lg Energy Solution, Ltd. | Shunt resistor and apparatus for detecting current including the same |
| CN111133321B (en) * | 2018-03-28 | 2022-06-14 | 株式会社Lg新能源 | Shunt resistor and device for detecting current including shunt resistor |
| CN108646069A (en) * | 2018-04-26 | 2018-10-12 | 李秀才 | 6 ~ 630A direct-type intelligent electric meters |
| CN112547908A (en) * | 2020-11-16 | 2021-03-26 | 深圳市业展电子有限公司 | U-shaped shunt terminal processing technology |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1319078C (en) | 2007-05-30 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Bengbu Double Circle Electronics Group Co., Ltd. Assignor: Peng Delong Contract record no.: 2011340000262 Denomination of invention: Precision shunt resistor and manufacturing method thereof Granted publication date: 20070530 License type: Exclusive License Open date: 20041110 Record date: 20110805 |
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| IW01 | Full invalidation of patent right |
Decision date of declaring invalidation: 20130608 Decision number of declaring invalidation: 20775 Granted publication date: 20070530 |
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