CN204634262U - A kind of bucking current does not change the device of CURRENT DISTRIBUTION - Google Patents
A kind of bucking current does not change the device of CURRENT DISTRIBUTION Download PDFInfo
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- CN204634262U CN204634262U CN201520264722.8U CN201520264722U CN204634262U CN 204634262 U CN204634262 U CN 204634262U CN 201520264722 U CN201520264722 U CN 201520264722U CN 204634262 U CN204634262 U CN 204634262U
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- current
- copper
- aluminium
- power supply
- change
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Abstract
Bucking current does not change a device for CURRENT DISTRIBUTION, is made up of power supply (1), telegraph key (2), resistance (3), aluminium block (4), copper ring (5), polymethyl methacrylate ring (6), transducer (7).It is characterized in that: described power supply (1), telegraph key (2), resistance (3), aluminium block (4) are connected, telegraph key (2) controls the break-make of power supply (1); Aluminium block (4) and copper ring (5) close contact, copper ring is air in (5).The conductivityσ of aluminium
aluminium=3.45 × 10
7s/m, the conductivityσ of copper
copper=5.9 × 10
7s/m, air conductivity σ
air=10
-14s/m; The outer radius of copper ring (5) is 1.95 with the ratio of inside radius.When inside put into by transducer (7), because aluminium, the conductivity of copper two groups of kind materials and the size relationship of device meet bucking current but do not change the condition of CURRENT DISTRIBUTION, therefore, can not be subject to the interference of extraneous electric current at the sensor accurate device of this device internal work, and accurate device around is not subject to the impact of current induced magnetic field yet.
Description
Technical field
This device shields the electric current of central area, and does not change CURRENT DISTRIBUTION around, belongs to electromagnetic field technology field.
Background technology
When electric current is by conductor, produce magnetic field around, magnetic field has an impact to sensor accurate device, although traditional shielding can bucking current, but current density there occurs change, the magnetic field namely there occurs change, thus disturbs the normal use of accurate device.For this reason, design and a kind ofly can the device that current density is constant can be kept again around to have realistic meaning very much by bucking current.
Utility model content
For solving the problem, the purpose of this utility model, just in order to solve above-mentioned the deficiencies in the prior art, provides a kind of structure simple, bucking current easy to use and do not change the device of CURRENT DISTRIBUTION.
The utility model is achieved through the following technical solutions:
As shown in Figure 1, this device is made up of power supply 1, telegraph key 2, resistance 3, aluminium block 4, copper ring 5, air ring 6, transducer 7.It is characterized in that: described power supply 1, telegraph key 2, resistance 3, aluminium block 4 are connected, and telegraph key 2 controls the break-make of power supply 1; Aluminium block 4 and copper ring 5 close contact are air in copper ring 5.The conductivityσ of aluminium
aluminium=3.45 × 10
7s/m, the conductivityσ of copper
copper=5.9 × 10
7s/m, air conductivity σ
air=10
-14s/m; The outer radius of copper ring 5 is 1.95 with the ratio of inside radius.When inside put into by transducer 7, because aluminium, the conductivity of copper two groups of kind materials and the size relationship of device meet bucking current but do not change the condition of CURRENT DISTRIBUTION, therefore, can not be subject to the interference of extraneous electric current at the sensor accurate device of this device internal work, and accurate device around is not subject to the impact of current induced magnetic field yet.
The beneficial effects of the utility model are: this apparatus structure is simple, easy to use, applied widely.It is its ideal device not disturbed by external electromagnetic field of protection in precision instrument uses.
Accompanying drawing explanation
Fig. 1 is the structural representation that a kind of bucking current of the utility model does not change CURRENT DISTRIBUTION device.
Embodiment
As shown in Figure 1, a kind of bucking current does not change the device of CURRENT DISTRIBUTION, be made up of power supply 1, telegraph key 2, resistance 3, aluminium block 4, copper ring 5, air ring 6, transducer 7, it is characterized in that: described power supply 1, telegraph key 2, resistance 3, aluminium block 4 are connected, and telegraph key 2 controls the break-make of power supply 1; Aluminium block 4 and copper ring 5 close contact.The conductivityσ of aluminium
aluminium=3.45 × 10
7s/m, the conductivityσ of copper
copper=5.9 × 10
7s/m, air conductivity σ
air=10
-14s/m; The outer shroud radius of copper ring 5 is 1.95 with the ratio of inside radius.
When precision instrument is as working sensor, transducer 7 or other precision instruments are put into the inside of copper ring 5, meet bucking current due to aluminium, the conductivity of copper bi-material and the size relationship of device and do not change the condition of CURRENT DISTRIBUTION, therefore, this device can shield around electric current and not change the distribution of electric current, thus the interference of external electromagnetic field can not be subject at the transducer of this device internal work, steady operation.
Below disclose the utility model with better enforcement, so itself and be not used to limit the utility model, allly take equivalent replacement or technical scheme that equivalent transformation obtains, all in protection range of the present utility model.
Claims (1)
1. a bucking current does not change the device of CURRENT DISTRIBUTION, be made up of power supply (1), telegraph key (2), resistance (3), aluminium sheet (4), copper ring (5), air ring (6), transducer (7), described power supply (1), telegraph key (2), resistance (3), aluminium block (4) are connected, and telegraph key (2) controls the break-make of power supply (1); Aluminium block (4) and copper ring (5) close contact; The outer shroud radius of copper ring (5) and the ratio of inside radius are 1.95.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520264722.8U CN204634262U (en) | 2015-04-24 | 2015-04-24 | A kind of bucking current does not change the device of CURRENT DISTRIBUTION |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520264722.8U CN204634262U (en) | 2015-04-24 | 2015-04-24 | A kind of bucking current does not change the device of CURRENT DISTRIBUTION |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204634262U true CN204634262U (en) | 2015-09-09 |
Family
ID=54053237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520264722.8U Expired - Fee Related CN204634262U (en) | 2015-04-24 | 2015-04-24 | A kind of bucking current does not change the device of CURRENT DISTRIBUTION |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204634262U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104797126A (en) * | 2015-04-24 | 2015-07-22 | 南京农业大学 | Device for shielding current without changing current distribution |
-
2015
- 2015-04-24 CN CN201520264722.8U patent/CN204634262U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104797126A (en) * | 2015-04-24 | 2015-07-22 | 南京农业大学 | Device for shielding current without changing current distribution |
| CN104797126B (en) * | 2015-04-24 | 2018-02-06 | 南京农业大学 | A kind of bucking current does not change the device of CURRENT DISTRIBUTION |
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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: 20150909 Termination date: 20160424 |