CN202870146U - Magnetic core mounting structure for zero-flux Hall heavy-current sensor - Google Patents
Magnetic core mounting structure for zero-flux Hall heavy-current sensor Download PDFInfo
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- CN202870146U CN202870146U CN 201220464240 CN201220464240U CN202870146U CN 202870146 U CN202870146 U CN 202870146U CN 201220464240 CN201220464240 CN 201220464240 CN 201220464240 U CN201220464240 U CN 201220464240U CN 202870146 U CN202870146 U CN 202870146U
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- mounting plate
- magnetic core
- upper mounting
- current sensor
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Abstract
The utility model discloses a magnetic core mounting structure for a zero-flux Hall heavy-current sensor. The magnetic core mounting structure comprises an upper mounting plate and a lower mounting plate as same as the upper mounting plate, wherein the upper mounting plate and the lower mounting plate each is centrally provided with a square hole as a magnetic core mounting hole, and the dimension of the magnetic core mounting hole is slightly larger than the cross section of a magnetic core; a plurality of round positioning bosses are arranged on a lower surface of the upper mounting plate, and a plurality of round positioning depressions matching with the round positioning bosses are arranged on an upper surface of the lower mounting plate; and front ends and rear ends of the upper mounting plate and the lower mounting plate each is provided with two hangers, and the positions of the hangers of the upper mounting plate are as same as that of the hangers of the lower mounting plate. According to the utility model, the upper mounting plate and the lower mounting plate are concave-convex engaged, and the magnetic cores are tightly contacted without any air gap, thereby effectively solving the problem that, as the size of the magnetic cores of the heavy-current sensor is large, large air gaps and displacement are generated between the connected upper and lower magnetic cores during the mounting process, and preventing enlarged flux leakage at the joint of the magnetic cores.
Description
Technical field
The utility model relates to zero magnetic flux Hall great current sensor, is specifically related to a kind of zero magnetic flux Hall great current sensor magnetic core mounting structure.
Background technology
Traditional zero magnetic flux Hall element is generally converted according to the no-load voltage ratio of 5000:1 when measuring the design of 20KA sensor outer housing.Tested electric current is little, the number of turn 2500 circles of compensating coil, and two coil Same Name of Ends series connection just can reach requirement.According to the magnetic potential equation I1N1=I2N2 of current sensor, under the little current conditions, pay the electric current I 2 of limit compensating coil also to less, the cross section of the enameled wire of coiling is also smaller, so the volume of final coil is very little.Coil is installed in the limited space that enclosure interior takies, and the overall dimension of sensor will be little like this.
Under electric current 30-100KA current conditions, along with electric current increases, in the certain situation of the turn ratio, secondary coil offset current I2 also can proportional linear increasing.Guarantee long-time steady operation, feasible method is exactly the sectional area that increases enameled wire, and the ability of its current flowing is increased.When sensor worked long hours like this, the temperature of second compensation coil can be not too high and cause insulation course to damage, and forms the turn-to-turn short circuit of coil.Guaranteeing that the compensating coil volume that the diameter increase of coil obviously winds up also can increase much in the certain situation of the number of turn.
Metallurgical and chemical industry comprises that the working power of ITER power-supply system is very large, and minimum measurement electric current is in tens kA grades, and maximum can arrive hundreds of kA.The conductor busbar of ITER DC test platform adopts aluminum, sectional dimension is 350mm*250mm, guarantee in the situation of insulation distance, the perforated sections of sensor minimum also is greater than the hole dimension of 400mm*400mm, so large hole dimension, Hall zero magnetic flux current sensor that satisfies the ITER power requirement on the domestic and international market has not had.The compare busbar of copper product has but increased the size of busbar when the aluminium cribbing has been made an appointment with cost, indirectly also just increased the size of sensor.The gas length of the gordian technique of sensor construction control magnetic core and guarantee that the skew of magnetic core on can occurrence positions just becomes and be not easy very much.
Hall current sensor is when measuring large electric current, usually by adopting up and down two parts " HALF " structure, be enclosed within the peripheral of tested busbar and link together by latch mechanism, so along with the volume of sensor enlarges, the length of magnetic core also can increase, it is large that the installation difficulty of magnetic core becomes, because Hall current sensor when measuring electric current, comes the size of reduced current exactly by the magnetic flux size in the Hall element measurement magnetic core.Closely or on the position deviation is not arranged if the HALF of magnetic core closes up a mouthful installation, will produce larger leakage field, affect very much the measuring accuracy of sensor.
The utility model content
The purpose of this utility model provides a kind of zero magnetic flux Hall great current sensor magnetic core mounting structure, so that sensor is convenient to installation and removal at the loop busbar, magnetic core can not form sidesway.
The technical solution adopted in the utility model is:
A kind of zero magnetic flux Hall great current sensor magnetic core mounting structure, it is characterized in that: include identical upper mounting plate, lower installation board, the centre of described upper mounting plate, lower installation board has a square aperture as the magnetic core mounting hole, the lower surface of upper mounting plate is provided with several circular positioning boss, the upper surface of lower installation board is provided with several circle location pits that cooperates with circular positioning boss, the front-end and back-end of described upper mounting plate, lower installation board are respectively equipped with two hangers, and the hangers on the upper mounting plate is identical with the hangers position on the lower installation board.
Be respectively equipped with a plurality of tapping holes, the perpendicular direction of the direction of tapping hole and magnetic core mounting hole around described upper mounting plate, the lower installation board.
The size of described magnetic core mounting hole is slightly larger than the magnetic core cross section.
The utility model has the advantages that:
1, by the circular positioning boss of upper mounting plate design, be snapped to the circle location pit of lower installation board, form very closely connection;
2, accurately open square aperture in the middle of the upper lower connecting plate, sensor is when installing, and magnetic core can not formed sidesway by fixed position, interfix hole;
3, thus, the concave-convex clutch of upper lower installation board, the magnetic core close contact, can not produce air gap, preferably resolve the great current sensor magnetic core because size is larger, connect up and down in the installation process and often have larger air gap and the problem of displacement between the magnetic core, avoided magnetic core to produce the leakage field that strengthens in the junction, affect the measuring accuracy of sensor;
4, upper mounting plate, lower installation board around stay tapping hole, the structure of Lower Half can utilize screw locking at installing plate on the sensor, with upper the latter half sealing of sensor;
5, the perforate on the hangers of the extension of upper mounting plate, lower installation board can be locked with screw rod, and the top and the bottom of sensor just can be combined into an integral body like this.
Description of drawings
Fig. 1 is the structural representation of upper mounting plate of the present utility model.
Fig. 2 is the structural representation of lower installation board of the present utility model.
Embodiment
Such as Fig. 1, shown in 2, a kind of zero magnetic flux Hall great current sensor magnetic core mounting structure, include identical upper mounting plate 1, lower installation board 2, upper mounting plate 1, the centre of lower installation board 2 has a square aperture as magnetic core mounting hole 3, the size of magnetic core mounting hole 3 is slightly larger than the magnetic core cross section, the lower surface of upper mounting plate 1 is provided with two circular positioning boss 4, the upper surface of lower installation board is provided with two circle location pits 5 that cooperate with circular positioning boss 4, upper mounting plate 1, the front-end and back-end of lower installation board 2 are respectively equipped with two hangers 6, and the hangers 6 on the upper mounting plate 1 is identical with hangers 6 positions on the lower installation board 2.
Be respectively equipped with a plurality of tapping holes 7, the perpendicular direction of the direction of tapping hole 7 and magnetic core mounting hole 4 around upper mounting plate 1, the lower installation board 2.
In sensor installation, the circular positioning boss of upper mounting plate 14 inserts pit 5 places, circle location of lower installation boards 2, forms closely to connect being interlocked of the magnetic core rule of two sections longer dimensions.
The up and down mounting plates structure that the utility model adopts, when magnetic core is installed, magnetic core is no more than 0.1mm in the deviation of two magnetic cores of vertical direction, two magnetic cores are combined closely in the position of joint, maximum air-gap is no more than 0.5mm, when the installation of large scale sensor, offset of vertical and the excessive problem of the air-gap between the magnetic core of the magnetic core that solves preferably.
Claims (3)
1. zero magnetic flux Hall great current sensor magnetic core mounting structure, it is characterized in that: include identical upper mounting plate, lower installation board, described upper mounting plate, the centre of lower installation board has a square aperture as the magnetic core mounting hole, the lower surface of upper mounting plate is provided with several circular positioning boss, the upper surface of lower installation board is provided with several circle location pits that cooperates with circular positioning boss, described upper mounting plate, the front-end and back-end of lower installation board are respectively equipped with two hangers, and the hangers on the upper mounting plate is identical with the hangers position on the lower installation board.
2. zero magnetic flux Hall great current sensor magnetic core mounting structure according to claim 1 is characterized in that: be respectively equipped with a plurality of tapping holes, the perpendicular direction of the direction of tapping hole and magnetic core mounting hole around described upper mounting plate, the lower installation board.
3. zero magnetic flux Hall great current sensor magnetic core mounting structure according to claim 1, it is characterized in that: the size of described magnetic core mounting hole is slightly larger than the magnetic core cross section.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220464240 CN202870146U (en) | 2012-09-11 | 2012-09-11 | Magnetic core mounting structure for zero-flux Hall heavy-current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220464240 CN202870146U (en) | 2012-09-11 | 2012-09-11 | Magnetic core mounting structure for zero-flux Hall heavy-current sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202870146U true CN202870146U (en) | 2013-04-10 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220464240 Expired - Fee Related CN202870146U (en) | 2012-09-11 | 2012-09-11 | Magnetic core mounting structure for zero-flux Hall heavy-current sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202870146U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107561336A (en) * | 2017-07-19 | 2018-01-09 | 中国科学院合肥物质科学研究院 | A kind of Hall slice mounting structure based on Zero-flux hall large-current sensor |
| CN111983285A (en) * | 2019-05-23 | 2020-11-24 | 威刚科技股份有限公司 | Current sensing module and current sensing structure thereof |
-
2012
- 2012-09-11 CN CN 201220464240 patent/CN202870146U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107561336A (en) * | 2017-07-19 | 2018-01-09 | 中国科学院合肥物质科学研究院 | A kind of Hall slice mounting structure based on Zero-flux hall large-current sensor |
| CN107561336B (en) * | 2017-07-19 | 2019-10-15 | 中国科学院合肥物质科学研究院 | A kind of Hall slice mounting structure based on Zero-flux hall large-current sensor |
| CN111983285A (en) * | 2019-05-23 | 2020-11-24 | 威刚科技股份有限公司 | Current sensing module and current sensing structure thereof |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130410 Termination date: 20180911 |