CN203825064U - Shunt - Google Patents
Shunt Download PDFInfo
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- CN203825064U CN203825064U CN201420229226.4U CN201420229226U CN203825064U CN 203825064 U CN203825064 U CN 203825064U CN 201420229226 U CN201420229226 U CN 201420229226U CN 203825064 U CN203825064 U CN 203825064U
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- shunt
- resistor disc
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- shunt according
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Abstract
The utility model designs a shunt, which mainly comprises a resistor sheet (101) and at least two sampling columns (102), wherein the resistor sheet (101) further comprises at least two holes (105), the sampling columns (102) are fixed on the resistor sheet (101), the sampling columns are served as an output end of voltage drop, and the holes (105) are served as a power supply input end. The beneficial effects of implementing the shunt is that the shunt adopts an integrated structure, uses the two holes in the resistor sheet as the power supply input end and a mounting end, replaces the traditional end sheets, eliminates the structural limitation of the traditional structure shunt, makes the shunt small in size and low in power consumption, so that the voltage drop reaches 5mV, and fills the blank in the domestic.
Description
Technical field
The utility model relates to communication apparatus, instrument and meter and electrical equipment measurement and control area, more particularly, relates in particular to a kind of shunt.
Background technology
Parallel connection resistive element when shunt concept comes from instrument range extension, in parallel with the magneto-electric gauge outfit of voltage such as grade in DC circuit, play current distributing, to expand the range of magneto-electric reometer.Backflow, current limliting, the current-sharing sampling that can be used for power supply to communication system, complete electronic set, robotization control etc. detects etc.
Tradition shunt is generally made up of the parts of the separation such as dististyle, resistance material, sampling end or binding post.These ingredients link together by parts such as welding, screw, conducting rod and packing rings, therefore, make volume larger, and structure is restricted.And due to the restriction of structure, the output pressure drop of shunt is generally 75mV, and power consumption is larger.
On the other hand, the resistance material welding between two dististyles of traditional shunt is generally electric resistance alloy, ordinary copper resistance relatively, and production cost is higher.
Utility model content
The technical problems to be solved in the utility model is, the defect that volume is large, cost is high, power consumption is large causing for existing traditional diversion structure restriction, provides a kind of shunt.
The utility model solves the technical scheme that its technical matters adopts: comprise resistor disc and at least two sampling columns, on described resistor disc, also comprise at least two holes, described sampling column is fixed on resistor disc, the output terminal that described sampling column is pressure drop, and described hole is power input.
In a kind of shunt described in the utility model, described resistor disc is rectangular copper resistance thin slice.
In a kind of shunt described in the utility model, the distance between described two central point of hole is between 74mm-76mm.
In a kind of shunt described in the utility model, described two holes are two circular holes that diameter is identical.
In a kind of shunt described in the utility model, two described holes are also as the installation end of described shunt.
In a kind of shunt described in the utility model, described sampling column lower end is M4 double-screw bolt, and upper end is opposite side 5.5mm six prisms, and the center of described six prisms is the threaded hole of the dark 6mm of diameter 4mm.
In a kind of shunt described in the utility model, described sampling column upper end is connected with the screw assemblies that can connect wire, and described sampling column is fixedly connected with by nut bullet pad with described resistor disc.
In a kind of shunt described in the utility model, described screw assemblies external wire, is the terminals of output pressure drop.
In a kind of shunt described in the utility model, also comprise the thermistor (temperature) sensor of measuring described resistor disc temperature variation, described thermistor (temperature) sensor is connected with described resistor disc by screw.
In a kind of shunt described in the utility model, the external single card microcomputer of revising and compensating for the variation of resistor disc output pressure drop that described resistor disc self-heating and variation of ambient temperature are caused in described thermistor (temperature) sensor one end.
Implement shunt described in the utility model, there is following beneficial effect: adopt integral structure, be used as power input and installation end with two holes on described resistor disc, replace traditional dististyle, eliminate the structural limitations of traditional shunt, make shunt volume little, low in energy consumption, thereby make pressure drop reach 5mV, filled up domestic blank.
Further, the utility model adopts ordinary copper material substitution electric resistance alloy, and reaches shunt specification by single card microcomputer correction, and because ordinary copper material is compared with electric resistance alloy, cost is lower, therefore, effectively reduces production cost.
Brief description of the drawings
Below in conjunction with drawings and Examples, the utility model is described in further detail, in accompanying drawing:
Fig. 1 is the main TV structure schematic diagram of the utility model embodiment;
Fig. 2 is the plan structure schematic diagram of the utility model embodiment.
Embodiment
Understand for technical characterictic of the present utility model, object and effect being had more clearly, now contrast accompanying drawing and describe embodiment of the present utility model in detail.
Fig. 1 and Fig. 2 are an example structure figure of the present utility model.Fig. 1 is main TV structure schematic diagram, and Fig. 2 is plan structure schematic diagram.
In the present embodiment, shunt comprises resistor disc 101,2 symmetrical sampling columns 102, M4 screw assemblies 104, screw 103 and thermistor (temperature) sensors 106, has two circular holes 105 on resistor disc 101.Particularly, because the size of resistance and the material of resistance, length, xsect size, temperature are relevant, so the position of circular hole 105 and the position of sampling column 102 on copper resistance sheet all can affect the size of resistance.The resistor disc 101 of the present embodiment adopts rectangular copper resistance sheet, and thickness, length and the width of copper resistance sheet are fixed.The position of two circular holes 105 and pore size and the position of sampling column 102 on copper resistance sheet are also fixed.Sampling column 102 lower ends are M4 double-screw bolt, are fixedly connected with by nut bullet pad 107 with copper resistance sheet 101, ensure to obtain the uniqueness of voltage, reduce Touch error; Upper end is opposite side 5.5mm six prisms, and the center of described six prisms is the threaded hole of the dark 6mm of diameter 4mm, and sampling column 102 upper ends are connected with M4 screw assemblies 104, and M4 screw assemblies 104 external wires, as the output terminal of pressure drop.Thermistor (temperature) sensor 106 is connected in copper resistance Pian101 center by screw 103, is used for measuring the temperature of copper resistance sheet 101, and other one end of thermistor (temperature) sensor 106 is connected with single card microcomputer, and single card microcomputer is connected with resistor disc 101 by sampling column simultaneously.Single card microcomputer in the present embodiment is the single card microcomputer of subscriber equipment itself.
In the time of work, in the time that two circular holes 105 have power supply input, specified electric current obtains the voltage on resistor disc 101 from one of them circular hole 105 101, two sampling columns 102 of resistor disc of flowing through, and the M4 screw association 104 being connected with sampling column 102 connects the voltage of wire output 5mV.But copper resistance sheet 101, due to electric current process, changes the temperature of copper resistance sheet 101, and then its resistance is changed, thereby current flowing is changed.Now, thermistor (temperature) sensor 106 is connected by screw 103 with copper resistance sheet 101, obtains the temperature variation of copper resistance sheet 101, and external single card microcomputer.Particularly, when thermistor (temperature) sensor 106 records after the variation of copper resistance sheet 101 temperature after energising, its situation of change is fed back to single card microcomputer, single card microcomputer receives signal, and pass through stored temperature, the data that are related to ratio between electric current and resistance, and then send a signal to control module, control module receives the current coefficient on adjusting resistance sheet 101 after signal, modifying factor copper resistance sheet 101 temperature variation and the curent change that causes at any time, make the resistance value of whole shunt remain constant, it is constant that thereby electric current keeps, finally reach the specification requirement of shunt.
In an embodiment of the present utility model, the shunt that meets 300A electric current, 5mV voltage, 0.5% accuracy requirement comprises resistor disc 101,2 symmetrical sampling columns 102, M4 screw assemblies 104, screw 103 and thermistor (temperature) sensors 106, has two circular holes 105 on resistor disc 101.Particularly, resistor disc 101 adopts rectangular copper resistance sheet, and the thickness of copper resistance sheet is 1.6mm, and long is 96mm, and wide is 21mm.Two circular holes 105 are symmetrically distributed in both sides centered by the axis of the length of resistor disc 101, and the diameter of two circular holes 105 is 10.5mm, and the distance between both centers of circle is 75mm.Two sampling columns 102 are connected with resistor disc 101 by nut bullet pad 107 respectively, and the distance between two sampling columns 102 is 30mm, and the overall height that M4 screw assemblies 104 exposed portions serve add six prismatic parts of sampling column 102 is 13mm.Thermistor (temperature) sensor 106 is connected in copper resistance Pian101 center by screw 103, and other one end of thermistor (temperature) sensor 106 is connected with single card microcomputer.
In an embodiment of the present utility model, meet the shunt of 500A electric current, 5mV voltage, 0.5% accuracy requirement, comprise resistor disc 101,2 symmetrical sampling columns 102, M4 screw assemblies 104, screw 103 and thermistor (temperature) sensors 106, on resistor disc 101, have two circular holes 105.Particularly, resistor disc 101 adopts rectangular copper resistance sheet, and the thickness of copper resistance sheet is 1.6mm, and long is 100mm, and wide is 30mm.Two circular holes 105 are symmetrically distributed in both sides centered by the axis of the length of resistor disc 101, and the diameter of two circular holes 105 is 12.5mm, and the distance between both centers of circle is 75mm.Two sampling columns 102 are connected with resistor disc 101 by nut bullet pad 107 respectively, and the distance between two sampling columns 102 is 26mm, and the height that M4 screw assemblies 104 exposed portions serve add six prismatic parts of sampling column 102 is 13mm.Thermistor (temperature) sensor 106 is connected in copper resistance Pian101 center by screw 103, and other one end of thermistor (temperature) sensor 106 is connected with single card microcomputer.Single card microcomputer in the present embodiment is the single card microcomputer of subscriber equipment itself.
The parameter list of two kinds of numbering shunts that table 1 provides for the utility model.As shown in table 1, the shunt specification of the model FLQ1030A1 that the utility model provides is 300A electric current, 5mV voltage, 0.5% precision, and the shunt specification of model FLQ1030A2 is 500A electric current, 5mV voltage, 0.5% precision.Wherein, A represents the length of copper resistance sheet 101, and B represents its width, and the resistor disc thickness of the shunt of different numberings is 1.6mm, and the overall height that M4 screw assemblies 104 exposed portions serve add six prismatic parts of sampling column 102 is 13mm.A1 represents the distance between the two circular hole centers of circle, and D represents the diameter of circular hole, and C represents the distance between two sampling columns, and unit is millimeter.
Table 1:
| Model | Specification | A | B | A1 | D | C |
| FLQ1030A1 | 300A5mV0.5％ | 96 | 21 | 75 | 10.5 | 30 |
| FLQ1030A2 | 500A5mV0.5％ | 100 | 30 | 75 | 12.5 | 26 |
Above size is as preferably, and error is all acceptable at positive and negative 1mm.
In the above-described embodiments, should be noted that, this embodiment adopts ordinary copper resistance as resistance material, be characterized in: resistance coefficient is very little, but the resistance variations that after energising, temperature variation causes is large (temperature coefficient of copper is approximately 100 times of aldary resistance material) very, so, while adopting ordinary copper material as the resistance material of shunt, temperature variation while must modifying factor energising and the variation of the resistance that causes.Therefore, in the utility model embodiment, adopt thermistor (temperature) sensor 106 to measure the temperature variation on copper resistance sheet 101 surfaces, and its situation of change is fed back to single card microcomputer, single card microcomputer modifying factor copper resistance sheet 101 temperature variation and the curent change that causes makes the resistance value of whole shunt remain constant at any time.The data that the coefficient adjustment signal of single card microcomputer can draw according to experiment realize by software program: record the relation data between temperature, electric current and resistance through overtesting, and draw coefficient adjustment instruction by software programming.
Can also realize by the mode of circuit the correction of electric current: record the relation data between temperature, electric current and resistance through overtesting, and be stored in the storage unit of single card microcomputer, in the time that single card microcomputer receives the signal of temperature variation, compare with the data of storage unit, again comparison result is sent to control module, control module receives the current coefficient on adjusting resistance sheet 101 after signal, modifying factor copper resistance sheet 101 temperature variation and the curent change that causes at any time, make the resistance value of whole shunt remain constant, constant thereby electric current keeps.
According to known above, the effect of thermistor (temperature) sensor 106 is the errors that cause because of temperature variation in order to measure copper resistance sheet 101, when selected resistance material is because temperature variation change in resistance is when very little, does not need thermistor (temperature) sensor 106 and single card microcomputer part.
By reference to the accompanying drawings embodiment of the present utility model is described above; but the utility model is not limited to above-mentioned embodiment; above-mentioned embodiment is only schematic; instead of restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; not departing from the scope situation that the utility model aim and claim protect, also can make a lot of forms, within these all belong to protection of the present utility model.
Claims (10)
1. a shunt, comprise resistor disc (101) and at least two sampling columns (102), it is characterized in that, on described resistor disc (101), also comprise at least two holes (105), described sampling column (102) is fixed on described resistor disc (101), the output terminal that described sampling column (102) is pressure drop, described hole (105) is power input.
2. a kind of shunt according to claim 1, is characterized in that, described resistor disc (101) is rectangular copper resistance thin slice.
3. a kind of shunt according to claim 1, is characterized in that, the distance between the central point of described two holes (105) is between 74mm-76mm.
4. a kind of shunt according to claim 1, is characterized in that, described two holes (105) are two circular holes that diameter is identical.
5. a kind of shunt according to claim 1, is characterized in that, described two holes (105) are also as the installation end of described shunt.
6. a kind of shunt according to claim 1, is characterized in that, described sampling column (102) lower end is M4 double-screw bolt, and upper end is opposite side 5.5mm six prisms, and the center of described six prisms is the threaded hole of the dark 6mm of diameter 4mm.
7. a kind of shunt according to claim 1, it is characterized in that, described sampling column (102) upper end is connected with the screw assemblies (104) that can connect wire, and described sampling column (102) is fixedly connected with by nut bullet pad (107) with described resistor disc (101).
8. a kind of shunt according to claim 7, is characterized in that, described screw assemblies (104) external wire is the terminals of output pressure drop.
9. a kind of shunt according to claim 1, it is characterized in that, also comprise the thermistor (temperature) sensor (106) of measuring described resistor disc (101) temperature variation, described thermistor (temperature) sensor (106) is connected with described resistor disc (101) by screw (103).
10. a kind of shunt according to claim 9, it is characterized in that the external single card microcomputer of revising and compensating for the variation of resistor disc (101) output pressure drop that described resistor disc (101) self-heating and variation of ambient temperature are caused in described thermistor (temperature) sensor (106) one end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420229226.4U CN203825064U (en) | 2014-05-06 | 2014-05-06 | Shunt |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420229226.4U CN203825064U (en) | 2014-05-06 | 2014-05-06 | Shunt |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203825064U true CN203825064U (en) | 2014-09-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420229226.4U Expired - Fee Related CN203825064U (en) | 2014-05-06 | 2014-05-06 | Shunt |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203825064U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106249186A (en) * | 2016-07-19 | 2016-12-21 | 北京长城华冠汽车科技股份有限公司 | The bearing calibration of a kind of battery management system diverter current acquisition data and device |
| CN106526272A (en) * | 2016-09-24 | 2017-03-22 | 北京东方计量测试研究所 | Novel precision shunt |
| CN108802476A (en) * | 2018-06-13 | 2018-11-13 | 贵州电网有限责任公司 | A kind of DC current transformer and its current test method |
-
2014
- 2014-05-06 CN CN201420229226.4U patent/CN203825064U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106249186A (en) * | 2016-07-19 | 2016-12-21 | 北京长城华冠汽车科技股份有限公司 | The bearing calibration of a kind of battery management system diverter current acquisition data and device |
| CN106526272A (en) * | 2016-09-24 | 2017-03-22 | 北京东方计量测试研究所 | Novel precision shunt |
| CN106526272B (en) * | 2016-09-24 | 2020-02-21 | 北京东方计量测试研究所 | Precise shunt |
| CN108802476A (en) * | 2018-06-13 | 2018-11-13 | 贵州电网有限责任公司 | A kind of DC current transformer and its current test method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140910 Termination date: 20200506 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |