CN206116124U - Precision current sensing resistance - Google Patents
Precision current sensing resistance Download PDFInfo
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- CN206116124U CN206116124U CN201621155616.7U CN201621155616U CN206116124U CN 206116124 U CN206116124 U CN 206116124U CN 201621155616 U CN201621155616 U CN 201621155616U CN 206116124 U CN206116124 U CN 206116124U
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- resistance
- precision current
- current sensing
- termination electrode
- senses
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Abstract
The utility model provides a precision current sensing resistance, this precision current sensing resistance of is by alloy resistive body and the termination electrode butt fusion that the lies in alloy resistive body both ends respectively bridge -shaped resistance that forms, and it has the protection to prevent the layer to cover at alloy resistive body, and the termination electrode has nickel dam and tin layer from introversive outer the electroplating. This precision current sensing resistance structure and production simple process, resistance be accurate, dispel the heat, high temperature resistant, power is big, the yield is high, low in production cost, suitable mass production.
Description
Technical field
The utility model is related to precision current sensing resistive technologies field, and more particularly to a kind of precision current senses resistance.
Background technology
The size of resistance is limited by the resistivity of conductor, the length of conductor and its cross-sectional area.If the rule of conductor material one
Its resistivity is also certain, the size to change resistance value, then must pass through to change the length or cross-sectional area of conductor could reach
To purpose.At present, high-power precision current senses the production of resistance, is attached on ceramic substrate using electric resistance alloy piece mostly
Method.As Chinese patent discloses notification number for CN201117381Y, entitled multiple layer-type current sensing component structure, its resistance
Layer is attached on ceramic substrate by mucigel, and by being superimposed single-layer products resistance, hoisting power are reduced, potsherd it is folded
Plus potsherd rupture is easily caused, due to the superposition of potsherd, its integral thickness also increases, and not meeting electric equipment products miniaturization will
Ask.And for example the publication No. disclosed in Chinese patent is CN102354590A, a kind of entitled precise current sensing component and manufacture
Method, the structure and production method are similarly composite layered structure, and by being superimposed resistive layer resistance, hoisting power are reduced,
Due to the superposition of resistive layer, its integral thickness also increases, it is clear that also do not reach the ideal of electric equipment products miniaturization.
The content of the invention
The purpose of this utility model is to provide a kind of precision current to sense resistance, the precision current sensing electric resistance structure letter
Single, resistance is accurate, high temperature resistant, good heat dissipation, power are big, easy to process, high yield rate, is adapted to produce in enormous quantities.
A kind of precision current senses resistance, and the precision current senses resistance by resistance alloys body and respectively positioned at alloy electricity
The termination electrode welding at resistance body both ends forms bridge like resistance, and the resistance alloys body is coated with protection welding resisting layer, the end
Electrode is from inside to outside electroplate with nickel dam and tin layers.
The resistance alloys body material therefor is copper-manganese-nickel alloy.The resistance alloys body material therefor is cupro-nickel aluminium
Ferroalloy.The material of the termination electrode is red copper.
Compared with prior art, the utility model has the advantages that：
（1）Precision current sensing resistance of the present utility model is to adopt monolithic homozygosis gold resistor main body, therefore its thermal diffusivity is good,
Temperature tolerance is good, is resistant to high current and high-power；Meanwhile, the electric resistance structure is simple, can reach small form factor requirements.
（2）When manufacturing this precision current sensing resistance, first three composite strips of horizontal spelling are made with electron beam weldering welding process,
Then make the bridge like resistance of row arrangement using ripe punch forming process, the shape of the bridge like resistance, cross section and its
Size is determined that the general negative common difference for choosing predetermined resistance value is made after bridge like resistor chain just by default resistance and power
Can be carrying out repairing resistance to each bridge like resistance with mechanical grinding mode so as to which resistance reaches required precision, it is seen then that its resistance value is adjusted
Adjusting method is simple and convenient, changes resistor main body cross-sectional dimension and is capable of achieving to reduce its resistance.
（3）This precision current senses resistance simple production process, and low production cost, high yield rate is adapted to produce in enormous quantities.
Description of the drawings
Fig. 1 is the composite strip of horizontal spelling three knot for manufacturing precision current sensing resistance of the utility model one embodiment
Structure schematic diagram.
Fig. 2 is the left view of Fig. 1.
Fig. 3 is the one time punching molded structure for obtaining the connected bridge like resistance of a row of three composite strip Jing of horizontal spelling shown in Fig. 1
Schematic diagram.
Fig. 4 is the left view of Fig. 3.
Fig. 5 is the structural representation for becoming single bridge like resistance after a row bridge like resistance is cleaved shown in Fig. 3.
Fig. 6 is the top view of Fig. 5.
Fig. 7 is that bridge like resistance shown in Fig. 6 makes the structural representation that precision current senses resistance, and resistance appearance is printed on type
Number, specification, word printed words.
Fig. 8 is the A-A sectional views of Fig. 7.
Label is represented in figure：1st, alloy strip；1-1, resistance alloys body；1-1-1, protection welding resisting layer；2nd, copper belt；2-1、
Termination electrode base substrate；2-2, termination electrode；2-2-1, nickel dam；2-2-2, tin layers.
Specific embodiment
The utility model is further elaborated by example below.
Referring to shown in Fig. 1-Fig. 8, a kind of precision current senses resistance by resistance alloys body 1-1 and respectively positioned at alloy electricity
The termination electrode 2-2 weldings at resistance body 1-1 both ends form bridge like resistance, and in resistance alloys body 1-1 protection welding resisting layer is coated with
1-1-1, the termination electrode 2-2 is from inside to outside electroplate with nickel dam 2-2-1 and tin layers 2-2-2.The material of resistance alloys body 1-1 is
Copper-manganese-nickel alloy or cupro-nickel alfer, the material of two end electrodes 2-2 is red copper.
The method and step for manufacturing above-mentioned precision current sensing resistance is as follows：
（1）Using three composite strips of horizontal spelling, the band welds welding by copper belt 2+ alloy strip 1+ copper belt 2 using electron beam
Form, the material of alloy strip 1 is copper-manganese-nickel alloy or cupro-nickel alfer.
（2）Three composite strips of horizontal spelling are obtained the connected bridge like resistance of a row by punch forming by one time punching molded, should
Between row bridge like resistance by it is horizontal spelling three composite strip rim charges be that termination electrode base substrate 2-1 connects into a column-shaped, each bridge like resistance
Shape, cross section and its size are determined by default resistance and power.
（3）Resistance is repaiied, each the bridge like resistance to forming a line is modified resistance using mechanical grinding mode, makes up to
Resistance accuracy is required.
（4）Plastic packaging, using fire prevention level epoxy resin resistance alloys body 1-1 surfaces are coated in, and form protection welding resisting layer.
（5）Solidification, is carried out aging solid to the protection welding resisting layer on alloy resistor main body 1-1 surface at a temperature of 100～120 DEG C
Change.
（6）Lettering, on the protection welding resisting layer 1-1-1 of resistance alloys body 1-1 the printed words such as model, specification are stamped.
（7）Pelletizing, the bridge like resistance of a row arrangement is longitudinally cutting into single bridge like resistance along C lines.
（8）Plating, electroplates to the red copper body at the resistance alloys body 1-1 two ends of single bridge like resistance after cutting, first
One layer of nickel dam 2-2-1 of plating, then one layer of tin layers 2-2-2 are plated, become termination electrode 2-2.
Adopt said method that the product technology and dimensional parameters of the precision current sensing resistance of part is obtained for table 1, table 2：
Table 1
The code name that a kind of table is represented：L-- precision currents sense resistance total length, unit mm；
W-- precision currents sense resistance overall width, unit mm；
T-- precision currents sense resistance gross thickness, unit mm；
A-- precision currents sense resistance terminal electrode width, unit mm；.
Table 2
Claims (4)
1. a kind of precision current senses resistance, it is characterised in that：The precision current senses resistance by resistance alloys body and difference
Termination electrode welding positioned at resistance alloys body both ends forms bridge like resistance, and it is anti-welding that the resistance alloys body is coated with protection
Layer, the termination electrode is from inside to outside electroplate with nickel dam and tin layers.
2. precision current according to claim 1 senses resistance, it is characterised in that：The resistance alloys body material therefor
For copper-manganese-nickel alloy.
3. precision current according to claim 1 senses resistance, it is characterised in that：The resistance alloys body material therefor
For cupro-nickel alfer.
4. precision current according to claim 1 senses resistance, it is characterised in that：The material of the termination electrode is red copper.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621155616.7U CN206116124U (en) | 2016-10-31 | 2016-10-31 | Precision current sensing resistance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621155616.7U CN206116124U (en) | 2016-10-31 | 2016-10-31 | Precision current sensing resistance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206116124U true CN206116124U (en) | 2017-04-19 |
Family
ID=58527632
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621155616.7U Active CN206116124U (en) | 2016-10-31 | 2016-10-31 | Precision current sensing resistance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206116124U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106356168A (en) * | 2016-10-31 | 2017-01-25 | 佛山好运电器配件有限公司 | Precise electric current sensing resistor and manufacturing method thereof |
| CN113628819A (en) * | 2021-08-02 | 2021-11-09 | 昆山业展电子有限公司 | Alloy chip resistor, and processing equipment and processing technology thereof |
| CN115240938A (en) * | 2022-06-22 | 2022-10-25 | 昆山业展电子有限公司 | Shunt resistor, production equipment and production method thereof |
-
2016
- 2016-10-31 CN CN201621155616.7U patent/CN206116124U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106356168A (en) * | 2016-10-31 | 2017-01-25 | 佛山好运电器配件有限公司 | Precise electric current sensing resistor and manufacturing method thereof |
| CN113628819A (en) * | 2021-08-02 | 2021-11-09 | 昆山业展电子有限公司 | Alloy chip resistor, and processing equipment and processing technology thereof |
| CN115240938A (en) * | 2022-06-22 | 2022-10-25 | 昆山业展电子有限公司 | Shunt resistor, production equipment and production method thereof |
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