CN208027836U - A kind of sampling resistor and feedback circuit - Google Patents
A kind of sampling resistor and feedback circuit Download PDFInfo
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- CN208027836U CN208027836U CN201820516049.6U CN201820516049U CN208027836U CN 208027836 U CN208027836 U CN 208027836U CN 201820516049 U CN201820516049 U CN 201820516049U CN 208027836 U CN208027836 U CN 208027836U
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- resistance value
- sampling resistor
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- joint face
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Abstract
The utility model is related to resistive technologies fields, provide a kind of sampling resistor, it include the lead portion for generating voltage difference for acquiring the resistance value portion of current signal and being set to resistance value portion two side ends and be used to connect with circuit board, resistance value portion is different with the material of lead portion, resistance value portion includes resistance value main body and is formed in the resistance value bending body of resistance value main body two side ends, lead portion includes pin main body and is formed in the pin stretching body of end face of the pin main body far from resistance value bending body, resistance value bending body includes the first joint face, pin main body includes the second joint face docked with the first joint face, resistance value portion and the lead portion bending and molding after one and punching press by electron beam welding.The resistance accuracy of sampling resistor provided by the utility model is high and facilitates positioning and installation；The utility model also provides a kind of feedback circuit, including above-mentioned sampling resistor, and the current values precision of feedback is high.
Description
Technical field
The utility model belongs to resistive technologies field, more particularly to a kind of sampling resistor and feedback circuit.
Background technology
Existing plug-in type sampling resistor, with constantan wire (the cupro-nickel electric resistance alloy as the main component) electricity of coiling machine production
Resistance, based on manganese-copper filament (with copper electric resistance alloy as the main component) resistance, but its shortcoming is that resistance accuracy is not high, to accomplish ±
1% resistance accuracy can cause material wastage rate height.
Utility model content
The purpose of this utility model is to provide a kind of sampling resistors, are hindered with solving sampling resistor existing in the prior art
It is worth the not high problem of precision.
To achieve the above object, the technical solution adopted in the utility model is：A kind of sampling resistor, including be used to generate electricity
Pressure difference is for acquiring the resistance value portion of current signal and be set to resistance value portion two side ends and be used to connect with circuit board
The material of lead portion, the resistance value portion and the lead portion is different, and the resistance value portion includes resistance value main body and is formed in the resistance
It is worth the resistance value bending body of main body two side ends, the lead portion includes pin main body and is formed in the pin main body far from the resistance
The pin for being worth the end face of bending body stretches out body, and the resistance value bending body includes the first joint face, and the pin main body includes and institute
The second joint face of the first joint face docking, the resistance value portion and lead portion is stated to roll over after one and punching press by electron beam welding
Roll forming.
Further, first joint face and the second joint face are integral by electron beam welding.
Further, first joint face and the second joint face are the identical rectangle of shape and size, and first connects
Junction and the second joint face overlap ground fitting.
Further, it is cuboid that the pin main body and the pin, which stretch out body, and the pin stretches out the radial direction of body
Size is less than the radial dimension of the pin main body.
Further, it is same material integral structure that the pin main body and the pin, which stretch out body,.
Further, the resistance value bending body and the resistance value main body are same material integral structure.
Further, the resistance value portion is made of copper alloy.
Further, the resistance value portion is made of manganin.
Further, the lead portion is made of red copper.
The advantageous effect of sampling resistor provided by the utility model is：
The lead portion for being used to sample and be respectively arranged at resistance value portion two side ends by the way that resistance value portion is arranged is used to connect circuit board,
And resistance value portion is different with the material of lead portion, and using accurate electric resistance alloy, lead portion is used with preferably conductive in resistance value portion
Property and thermal conductivity metal, resistance value portion serves as effective resistance value part, and lead portion has preferable electric conductivity, and the resistance of the part can
It ignores, by setting resistance value portion and lead portion to the different component of material, can more precisely measure current data,
Lead portion is avoided to influence sample effect；In the production process, resistance value portion according to the demand of resistance value, can adjust the size of itself to
Change the cross-sectional area in resistance value portion to change the resistance value in resistance value portion, lead portion can be processed into corresponding shape according to the demand of connection type
The lead portion of shape size, avoids resistance value portion and lead portion uses same material caused by when processing lead portion, needs
The change in resistance to carry out abnormity cutting to lead portion and cause sampling resistor is big, influences its resistance accuracy；In addition processing machine
Tool bends resistance value portion so that resistance value portion forms resistance value main body and resistance value bending body, resistance value bending body to set at bending state
The pin main body on resistance value bending body is placed in simultaneously towards circuit board, facilitates the installation of pin main body on circuit boards；Lead portion is also
Pin including being formed in pin lower body face stretches out body, which stretches out body and be inserted into the corresponding interface of circuit board when mounted
In, setting facilitates sampling resistor installation and positioning.
The utility model also provides a kind of feedback circuit, including circuit board and above-mentioned sampling resistor, the sampling electricity
The lead portion of resistance is connect with the circuit board.
The advantageous effect of feedback circuit provided by the utility model is：
By the way that an above-mentioned sampling resistor is arranged in a feedback circuit, feedback current numerical value is more accurate.
Description of the drawings
Fig. 1 is the front view for the sampling resistor that the utility model embodiment provides；
Fig. 2 is the right view for the sampling resistor that the utility model embodiment provides；
Fig. 3 is the upward view in the resistance value portion that the utility model embodiment provides；
Fig. 4 is the vertical view for the lead portion that the utility model embodiment provides.
Each reference numeral is in figure：
| Resistance value portion | 1 | Resistance value bending body | 12 | First joint face | 121 |
| Lead portion | 2 | Pin main body | 21 | Second joint face | 211 |
| Resistance value main body | 11 | Pin stretches out body | 22 |
Specific implementation mode
In order to make technical problem to be solved in the utility model, technical solution and advantageous effect be more clearly understood, with
Lower combination accompanying drawings and embodiments, the present invention will be further described in detail.It should be appreciated that specific reality described herein
It applies example to be only used to explain the utility model, is not used to limit the utility model.
It should be noted that when element is referred to as " being fixed on " or " being set to " another element, it can be located immediately at
It is located on another element on another element or indirectly.When an element is referred to as " being connected to " another element, it can
To be connected directly or indirectly to another element.
It is to be appreciated that term " length ", " width ", "upper", "lower", "front", "rear", "left", "right", "vertical",
The orientation or positional relationship of the instructions such as "horizontal", "top", "bottom" "inner", "outside" is that orientation based on ... shown in the drawings or position are closed
System is merely for convenience of description the utility model, rather than instruction device or element must have a particular orientation, with specific
Azimuth configuration and operation, therefore should not be understood as limiting the present invention.
In addition, term " first ", " second " are used for description purposes only, and should not be understood as indicating relative importance or instruction
The quantity of technical characteristic.The meaning of " plurality " is two or more in the description of the present invention, unless otherwise clear
It is specific to limit.The specific implementation of the utility model is further described in more detail below in conjunction with specific embodiment：
As shown in Figure 1 to Figure 4, a kind of sampling resistor that the utility model embodiment provides, includes for acquiring current signal
Resistance value portion 1 and the lead portion 2 for being set to 1 two side ends of resistance value portion and being used to connect with circuit board, resistance value portion 1 and lead portion 2
Material is different, and resistance value portion 1 includes resistance value main body 11 and the resistance value bending body 12 for being formed in 11 two side ends of resistance value main body, lead portion 2
Pin including pin main body 21 and the lower face for being formed in pin main body 21 stretches out body 22, and resistance value bending body 12 includes the first company
Junction 121, pin main body 21 include the second joint face 211 docked with the first joint face 121.
The sampling resistor of the present embodiment has the following technical effect that：
By the way that resistance value portion 1 is arranged for the electric current in circuit being sampled and being respectively arranged at 1 two side ends of resistance value portion
Lead portion 2 is for connecting circuit board, and resistance value portion 1 is different with the material of lead portion 2, and resistance value portion 1 is closed using accurate resistance
Gold, lead portion 2 serve as effective resistance value part using the metal with preferable electric conductivity and thermal conductivity, resistance value portion, and lead portion 2 has
The resistance of preferable electric conductivity, the part is negligible, by setting resistance value portion 1 and lead portion 2 to the different portion of material
Part can more precisely measure current data, and lead portion 2 is avoided to influence sample effect；In the production process, resistance value portion 1 can
According to the demand of resistance value, the size of itself is adjusted to change the cross-sectional area in resistance value portion 1 and changes the resistance value in resistance value portion 1, is drawn
The lead portion 2 of correspondingly-shaped size can be processed into according to the demand of connection type in foot 2, avoid resistance value portion 1 and lead portion 2 is adopted
With same material caused by when processing lead portion 2, need to lead portion 2 carry out abnormity cutting and cause sampling electricity
The change in resistance of resistance is big, influences its resistance accuracy；In addition, processing equipment bends resistance value portion 1 so that resistance value portion 1 forms resistance value
Main body 11 and resistance value bending body 12, the pin main body that resistance value bending body 12 to be set on resistance value bending body 12 at bending state
21, simultaneously towards circuit board, facilitate the installation of pin main body 21 on circuit boards；Lead portion 2 further includes being formed under pin main body 21
The pin of end face stretches out body 22, which stretches out body 22 and be inserted into the corresponding interface of circuit board when mounted, and setting facilitates
The sampling resistor is installed and positioning.
Specifically, resistance value portion 1 and lead portion 2 weld together, and resistance value portion 1 is alloy resistance material, are sampling resistor
Effective resistance value part, lead portion 2 are electrode material, serve between circuit board and resistance value portion 1 and are connected and fixed.By manufacturing
The width in journey fine tuning resistance value portion 1 ensures that product resistance value, resistance trimming principle be to change the cross-sectional area of resistive elementρ is the resistivity in resistance value portion 1, L be resistance value portion 1 in electric current by the effective length in direction, S is resistance value portion 1
Cross-sectional area.
Further, the first joint face 121 and the second joint face 211 are integral with electron beam welding.Electron beam welding is
Refer to using accelerate and focus beam bombardment be placed in vacuum or it is antivacuum in welding surface, make welded piece fusing realize weldering
It connects.Electron beam welding is small without welding rod, not oxidizable, good process repeatability and heat distortion amount because having the advantages that.Resistance value portion 1 with
Lead portion 2 is combined by the way of electron beam welding, is then punched into type, and two kinds of different materials are utilized instead of the prior art
Sampling resistor needs the process for carrying out spot welding in processing procedure, and is needed resistance material spring during prior art weld
Independent welding pin after machine bending and molding, causes processing procedure difficulty to become larger, and the present embodiment subtracts by using the mode of electron beam welding
To lack and punch forming is distinguished into resistance value portion and lead portion, the process for eliminating independent welding pin portion reduces the difficulty of processing procedure,
Improve the efficiency of production process.
Further, the first joint face 121 and the second joint face 211 are the identical rectangle of shape and size, and first
Joint face 121 and the second joint face 211 overlap setting.Second joint face of first joint face 121 and lead portion 2 in resistance value portion 1
211 docking, the first joint face 121 and the second joint face 211 are the identical rectangle of geomery and the two is bonded, and are avoided
The problem of surface of the docking of 2 the two of resistance value portion 1 and lead portion resistance value caused by misaligned is inaccurate, and error increases.
Further, it is cuboid that pin main body 21 and pin, which stretch out body 22, and the radial dimension that pin stretches out body 22 is small
In the radial dimension of pin main body 21.Pin stretches out body 22 and stretches out body 22 for being installed on the corresponding interface of circuit board, pin
Interface internal is inserted in, the size of pin main body 21 is more than pin and stretches out body 22, and therefore, pin main body 21 is butted on interface.The knot
Structure facilitates the installation and positioning of sampling resistor, improves the efficiency of installation.
Further, resistance value portion 1 and lead portion 2 are made in the way of mechanical stamping.Resistance value portion 1 and lead portion 2 with
The mode of welding is docked, and resistance value portion 1 and lead portion 2 are cut out preset shape, mechanical stamping in the way of mechanical stamping
Efficiency is fast, and cuts out precisely, ensure that the accuracy of effective resistance value of sampling resistor.
Further, it is same material integral structure that pin main body 21 and pin, which stretch out body 22,.
Further, resistance value bending body 12 and resistance value main body 11 are same material integral structure.
Further, the material in resistance value portion 1 is copper alloy.
Further, the material in resistance value portion 1 is manganin.Manganin is a kind of precision electrical resistance alloy, sampling resistor
Resistance accuracy require between ± 1%, manganin meets the requirement.
Further, the material of lead portion 2 is red copper.Red copper is industrial pure copper, with good electric conductivity, is easy to add
Work.
The utility model embodiment also provides a kind of feedback circuit comprising circuit board and above-mentioned sampling resistor.This is adopted
The lead portion of sample resistance is connect with circuit board.It connects in a feedback circuit the sampling resistor, the resistance value of sampling resistor is milliohm grade,
Current signal is converted to the voltage signal for being easy to measure value, the pressure drop at sampling resistor both ends is measured, then according to I=U/R
Current value is calculated.
The advantageous effect of feedback circuit provided in this embodiment is：
By the way that an above-mentioned sampling resistor is arranged in a feedback circuit, feedback current numerical value is more accurate.
The above is only the preferred embodiment of the utility model only, is not intended to limit the utility model, all at this
All any modification, equivalent and improvement etc., should be included in the utility model made by within the spirit and principle of utility model
Protection domain within.
Claims (10)
1. a kind of sampling resistor, it is characterised in that：Include for generate voltage difference for acquire current signal resistance value portion and
It is set to resistance value portion two side ends and the lead portion for being connect with circuit board, the material in the resistance value portion and the lead portion
Matter is different, and the resistance value portion includes resistance value main body and is formed in the resistance value bending body of the resistance value main body two side ends, the pin
Portion includes pin main body and is formed in the pin stretching body of end face of the pin main body far from the resistance value bending body, the resistance
It includes the first joint face to be worth bending body, and the pin main body includes the second joint face docked with first joint face, described
Resistance value portion and the lead portion bending and molding after one and punching press by electron beam welding.
2. sampling resistor as described in claim 1, it is characterised in that：First joint face and the second joint face pass through electronics
Beam is integrally welded.
3. sampling resistor as claimed in claim 2, it is characterised in that：First joint face and the second joint face be shape and
The identical rectangle of size, and the first joint face and the second joint face overlap ground fitting.
4. sampling resistor as claimed in claim 3, it is characterised in that：It is length that the pin main body and the pin, which stretch out body,
Cube, the pin stretch out radial dimension of the radial dimension less than the pin main body of body.
5. sampling resistor according to any one of claims 1-4, it is characterised in that：The pin main body and the pin stretch out
Body is same material integral structure.
6. sampling resistor according to any one of claims 1-4, it is characterised in that：The resistance value bending body and the resistance value master
Body is same material integral structure.
7. sampling resistor according to any one of claims 1-4, it is characterised in that：The resistance value portion is made of copper alloy.
8. sampling resistor as claimed in claim 7, it is characterised in that：The resistance value portion is made of manganin.
9. sampling resistor according to any one of claims 1-4, it is characterised in that：The lead portion is made of red copper.
10. a kind of feedback circuit, which is characterized in that including circuit board and such as claim 1-9 any one of them sampling electricity
Resistance, the lead portion of the sampling resistor are connect with the circuit board.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820516049.6U CN208027836U (en) | 2018-04-12 | 2018-04-12 | A kind of sampling resistor and feedback circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820516049.6U CN208027836U (en) | 2018-04-12 | 2018-04-12 | A kind of sampling resistor and feedback circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208027836U true CN208027836U (en) | 2018-10-30 |
Family
ID=63910399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820516049.6U Active CN208027836U (en) | 2018-04-12 | 2018-04-12 | A kind of sampling resistor and feedback circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208027836U (en) |
-
2018
- 2018-04-12 CN CN201820516049.6U patent/CN208027836U/en active Active
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