CN102568721A - High-precision low-resistivity noninductive shunt resistor - Google Patents
High-precision low-resistivity noninductive shunt resistor Download PDFInfo
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- CN102568721A CN102568721A CN2012100911316A CN201210091131A CN102568721A CN 102568721 A CN102568721 A CN 102568721A CN 2012100911316 A CN2012100911316 A CN 2012100911316A CN 201210091131 A CN201210091131 A CN 201210091131A CN 102568721 A CN102568721 A CN 102568721A
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Abstract
The invention relates to a high-precision low-resistivity noninductive shunt resistor, which is characterized in that a resistor is encapsulated in a shell; two electrodes are respectively connected to two ends of the resistor body and are exposed out of the shell; the resistor body is formed by punching a rectangular precise resistor alloy sheet into a zigzagged grid shape and folding the zigzagged grid shape along the symmetric axis of the resistor body; an insulation layer is filled between two parts of the folded resistor body; the shell is provided with a through hole which can accommodate a groove of the resistor and through which the electrodes pass; the resistor body is positioned in the groove; the electrode at one side of the resistor body passes through the through hole; and residual spaces of the groove and the through hole are respectively filled with a heat conducting material. Because the resistor body is formed by folding according to the symmetrical axis, electric currents on two adjacent sections of vertical grids of the resistor body are equal in size and opposite in direction, generated magnetic fields are mutually offset after being overlaid, and magnetic fields generated by all sections of the resistor body in the horizontal direction are also mutually offset; and therefore, the residual inductance on any resistivity section of the resistor body is extremely low. The high-precision low-resistivity noninductive shunt resistor disclosed by the invention has the advantages of reasonable structure, reliable performance, high precision, low inductance and good stability.
Description
Technical field
The present invention relates to a kind of resistance, the noninductive or low sense fixed resistor of specifically a kind of low resistance element.
Background technology
Existing low resistance noninductive resistance is because the limitation of structural design; This is difficult to reach satisfactory to both parties aspect two at the precision of resistance and low inductance, shows as following two kinds of situation usually, and a band that a kind of employing is long or a silk material are made the grating structure resistive element; It is bigger that the resistance of resistance and rated current can be done; The tone pitch of resistance is easier to control, and precision can accomplish ten thousand/, but inductance is bigger; Another kind is to adopt short band to make U type structural resistance body, and inductance is less, but the difficult control of tone pitch, the power load ability is little, and precision can only be accomplished one of percentage.
Summary of the invention
The object of the present invention is to provide the noninductive shunt resistance of a kind of high-accuracy low resistance, the Standard resistance range of this shunt resistance is wide, precision is high, temperature coefficient is low, good stability and inductance are little.
For realizing above-mentioned purpose, following scheme is adopted in invention: the noninductive shunt resistance of high-accuracy low resistance is packaged with resistive element in the housing; The two ends of resistive element are connected with electrode respectively; Electrode exposes outside housing, and resistive element constitutes by its axis of symmetry is folding after striking out circuitous grid shape by rectangle precision electrical resistance alloy thin slice, between folding resistive element two parts, is filled with insulating barrier; Have the through hole that the groove that can hold resistive element and the utmost point of supplying power pass on the housing; Resistive element is arranged in groove, and the electrode of resistive element one side passes through hole, in the remaining space of groove and through hole, is filled with heat conduction envelope material.
Visible by such scheme; Because resistive element constitutes by its axis of symmetry is folding after adopting the precision electrical resistance alloy fine sheet to strike out circuitous grid shape; According to the principle that reduces inductance, the size of current on the vertical bar grid of resistive element two neighboring sections equates, and is in the opposite direction; The magnetic field that produces also is that equal and opposite in direction, direction are opposite, cancels each other after the stack; Each section of resistive element horizontal direction also is that size of current equates behind symmetrical fold, and in the opposite direction, cancel each other in the magnetic field of generation, and then makes that the remaining inductance on any resistance section of resistive element is minimum.In addition, resistive element adopts sheet type among the present invention, also has following effect: 1) resistive band exchanges kelvin effect and weakens, and makes resistor also stabilizer pole of resistance under high-frequency current.2) increase area of dissipation, reduce the thermal resistance of resistor, increase the thermal stability of resistance, resistance can be used under big electric current.
Rational in infrastructure, the dependable performance of the present invention, its precision is high, little, the good stability of inductance.
Description of drawings
The deployed condition sketch map of an embodiment of resistive element among Fig. 1 the present invention;
Sketch map after resistive element folds among Fig. 2 Fig. 1;
The front view of Fig. 3 one embodiment of the invention;
The A-A cutaway view of Fig. 4 Fig. 3.
Embodiment
Further specify the present invention below in conjunction with an embodiment.
Referring to Fig. 1, Fig. 2
The noninductive shunt resistance of high-accuracy low resistance provided by the invention, its resistive element 1 constitute by its axis of symmetry is folding after striking out circuitous grid shape by rectangle precision electrical resistance alloy thin slice.Sense of current when arrow has been illustrated the resistive element energising among Fig. 1, combine Fig. 1, Fig. 2 it is thus clear that, resistive element is behind symmetrical fold; Size of current on the vertical bar grid of resistive element two neighboring sections equates; In the opposite direction, the magnetic field of generation also is that equal and opposite in direction, direction are opposite, cancels each other after the stack; Each section of resistive element horizontal direction also is that size of current equates that in the opposite direction, cancel each other in the magnetic field of generation.
Referring to Fig. 3, Fig. 4
Between folding resistive element 1 two parts, be filled with insulating barrier 5, insulating barrier 5 adopts the heat conductive insulating adhesive tape to stick on resistive element 1 surface and goes up formation.The two ends of resistive element 1 are connected with electrode respectively, and electrode is connected and composed by block type electrode 3 and rod-shaped electrode 4, and block type electrode 3 is connected with resistive element 1, and block type electrode 3 and resistive element 1 are connected through silver soldering.Have the through hole 2d that the groove 2c that can hold resistive element 1 and the utmost point of supplying power pass on the housing 2 of the present invention, resistive element 1 is arranged in groove 2c, and the electrode of resistive element 1 one sides passes through hole 2d, in the remaining space of groove 2c and through hole 2d, is filled with heat conduction envelope material 6.Block type electrode 3 exposes outside housing 2 with shaft-like 4 electrodes, does the voltage end and the current terminal of resistance respectively.For making the present invention have heat dispersion and stability preferably preferably; The material of housing 2 adopts aluminium alloy, adopts the high heat conductive silica gel of conductive coefficient bonding between resistive element 1 and the housing 2, and the material of heat conduction envelope material 6 adopts heat-conduction epoxy resin; Can be in addition; For ease of installing, the both sides of housing 2 one ends have outstanding step 2a respectively, have through hole 2b on the step 2a.
Shunt resistance precision provided by the invention is high, temperature coefficient is low, good stability, Standard resistance range are wide; The precision of this shunt resistance can accomplish ten thousand/; Temperature coefficient is low in wider temperature range can accomplish ± 5ppm; Standard resistance range 0.001R-1R, operating current can arrive 200A greatly, and inductance is less than 30nH.
Claims (3)
1. the noninductive shunt resistance of high-accuracy low resistance; Be packaged with resistive element in the housing, the two ends of resistive element are connected with electrode respectively, and electrode exposes outside housing; It is characterized in that: resistive element constitutes by its axis of symmetry is folding after striking out circuitous grid shape by rectangle precision electrical resistance alloy thin slice; Between folding resistive element two parts, be filled with insulating barrier, have the through hole that the groove that can hold resistive element and the utmost point of supplying power pass on the housing, resistive element is arranged in groove; The electrode of resistive element one side passes through hole, in the remaining space of groove and through hole, is filled with heat conduction envelope material.
2. the noninductive shunt resistance of high-accuracy low resistance according to claim 1, it is characterized in that: electrode is connected and composed by block type electrode and rod-shaped electrode, and block type electrode is connected with resistive element, and block type electrode and rod-shaped electrode expose outside housing.
3. the noninductive shunt resistance of high-accuracy low resistance according to claim 1 is characterized in that: the both sides of housing one end have outstanding step respectively, have through hole on the step.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100911316A CN102568721A (en) | 2012-03-30 | 2012-03-30 | High-precision low-resistivity noninductive shunt resistor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100911316A CN102568721A (en) | 2012-03-30 | 2012-03-30 | High-precision low-resistivity noninductive shunt resistor |
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| CN102568721A true CN102568721A (en) | 2012-07-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100911316A Pending CN102568721A (en) | 2012-03-30 | 2012-03-30 | High-precision low-resistivity noninductive shunt resistor |
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| CN (1) | CN102568721A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105575567A (en) * | 2016-01-29 | 2016-05-11 | 太仓弘杉环保科技有限公司 | High-frequency automobile LED tail light resistor |
| CN108520811A (en) * | 2018-03-14 | 2018-09-11 | 成都明杰科技有限公司 | A kind of precision resister reducing resistance varying-ratio |
| CN112863796A (en) * | 2021-01-12 | 2021-05-28 | 昆山业展电子有限公司 | Method for processing chip resistor |
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| US6087923A (en) * | 1997-03-20 | 2000-07-11 | Ceratech Corporation | Low capacitance chip varistor and fabrication method thereof |
| CN1588572A (en) * | 2004-09-24 | 2005-03-02 | 西安交通大学 | Wave regulating resistor for regulating inpulse current wave form |
| CN101079343A (en) * | 2007-07-05 | 2007-11-28 | 成都铁达电子有限责任公司 | Voltage-sensitive resistor with compound encapsulation voltage-leakage device |
| CN201430037Y (en) * | 2009-06-22 | 2010-03-24 | 济宁正和电子有限责任公司 | High-precision metal foil resistor chip |
| CN201503736U (en) * | 2009-08-18 | 2010-06-09 | 蚌埠市双环电子集团有限公司 | Fast-fusing anti-lightning-surge wire-wound resistor |
| CN201936709U (en) * | 2011-03-01 | 2011-08-17 | 蚌埠市双环电子集团有限公司 | Thick film type fixed resistor |
| CN202534448U (en) * | 2012-03-30 | 2012-11-14 | 蚌埠市双环电子集团有限公司 | High-precision and low resistance non-inductive shunt resistor |
-
2012
- 2012-03-30 CN CN2012100911316A patent/CN102568721A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6087923A (en) * | 1997-03-20 | 2000-07-11 | Ceratech Corporation | Low capacitance chip varistor and fabrication method thereof |
| CN1588572A (en) * | 2004-09-24 | 2005-03-02 | 西安交通大学 | Wave regulating resistor for regulating inpulse current wave form |
| CN101079343A (en) * | 2007-07-05 | 2007-11-28 | 成都铁达电子有限责任公司 | Voltage-sensitive resistor with compound encapsulation voltage-leakage device |
| CN201430037Y (en) * | 2009-06-22 | 2010-03-24 | 济宁正和电子有限责任公司 | High-precision metal foil resistor chip |
| CN201503736U (en) * | 2009-08-18 | 2010-06-09 | 蚌埠市双环电子集团有限公司 | Fast-fusing anti-lightning-surge wire-wound resistor |
| CN201936709U (en) * | 2011-03-01 | 2011-08-17 | 蚌埠市双环电子集团有限公司 | Thick film type fixed resistor |
| CN202534448U (en) * | 2012-03-30 | 2012-11-14 | 蚌埠市双环电子集团有限公司 | High-precision and low resistance non-inductive shunt resistor |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105575567A (en) * | 2016-01-29 | 2016-05-11 | 太仓弘杉环保科技有限公司 | High-frequency automobile LED tail light resistor |
| CN108520811A (en) * | 2018-03-14 | 2018-09-11 | 成都明杰科技有限公司 | A kind of precision resister reducing resistance varying-ratio |
| CN108520811B (en) * | 2018-03-14 | 2020-10-30 | 深圳市吉利通电子有限公司 | High-precision resistor capable of reducing resistance change rate |
| CN112863796A (en) * | 2021-01-12 | 2021-05-28 | 昆山业展电子有限公司 | Method for processing chip resistor |
| CN112863796B (en) * | 2021-01-12 | 2022-08-12 | 昆山业展电子有限公司 | Method for processing chip resistor |
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Application publication date: 20120711 |