CN201364356Y - Cascade current sensor - Google Patents
Cascade current sensor Download PDFInfo
- Publication number
- CN201364356Y CN201364356Y CNU2008201798004U CN200820179800U CN201364356Y CN 201364356 Y CN201364356 Y CN 201364356Y CN U2008201798004 U CNU2008201798004 U CN U2008201798004U CN 200820179800 U CN200820179800 U CN 200820179800U CN 201364356 Y CN201364356 Y CN 201364356Y
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- CN
- China
- Prior art keywords
- coil
- iron core
- stage
- current sensor
- utility
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a cascade current sensor, which comprises an iron core and coils, and is characterized in that the sensor is provided with at least two stages of iron core coils, wherein each stage of iron core coil is provided with an input coil and an output coil which are wound on the iron core; the last stage of output coil is connected with the next stage of input coil; and the output end of the tail stage of iron coil is connected in parallel with a resistance current divider. The utility model has the characteristics of process simplification, efficiency improvement, energy saving, consumption reduction, small size, light weight, high cost performance, high measurement precision, wide range, good linearity, strong load bearing capacity, safe and reliable running and no hidden dangers of accidents.
Description
Technical field
The utility model relates to a kind of electrical equipment, especially in, do to measure in the low-tension switch cabinet or a kind of current sensor of protection usefulness.
Background technology
In recent years, electric system develops to the direction of miniaturization, intellectuality, networking, electronic technology and computer technology have obtained using widely in electric system and distribution automation system, and current sensor has become the indispensable equipment in the transformation and distribution system.The secondary current that is applied to the current sensor in the automated system is generally a milliampere level, promptly several milliamperes to tens milliamperes.When primary current hour, according to design concept, cell winding ampere-turn quantity can not produce big influence to manufacture craft.But when primary current was big, the ampere turns of cell winding will be very big, and the making of product is difficulty very.For example: the current sensor of a 2000A/1V, if selecting secondary current is 0.02A, then the ampere turns of coil is 100000, this is to be difficult to realize under the prerequisite of considering cost of products and physical dimension.
Summary of the invention
The purpose of this utility model is to provide a kind of being adapted to use under the big current condition, and the tandem formula current sensor of making easily.
The purpose of this utility model is achieved in that a kind of tandem formula current sensor, comprise iron core, coil, it is characterized in that sensor is provided with the two-stage ironcore choke at least, each grade ironcore choke is provided with input coil and the output winding on the iron core, the upper level output winding is connected with the next stage input coil, the output terminal parallel resistance shunt of final stage ironcore choke.
Ironcore choke and divertor are into a single integrated structure with poured with epoxy resin.
The utility model is by being provided with the two-stage ironcore choke at least; utilize the electromagnetic induction principle classification to reduce electric current; because the impedance and the loss of digital instrument and protective device are less; make that core sections at different levels are less; the number of turn of coil and weight also reduce thereupon, although increased ironcore choke than conventional practice, the volume of cast back product can't increase; because manufacturing process is fairly simple, so production efficiency significantly improves.
Characteristics of the present utility model are: simplify technology, raise the efficiency, energy-saving and cost-reducing, volume is little, in light weight, cost performance is high, and measuring accuracy height, wide ranges, the linearity are good, and the on-load ability is strong, and is safe and reliable to operation, accident free hidden danger.
Description of drawings
Fig. 1 is a schematic diagram of the present utility model.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing;
As shown in the figure, present embodiment is the two-stage ironcore choke, wherein be wound with input coil 1 (can not do in pour mass) and output winding 3 on the iron core 2 of first order ironcore choke respectively, be wound with input coil 4 and output winding 6 on the iron core 5 of second level ironcore choke respectively, the two ends of the output winding 3 of the first order are connected with the two ends of partial input coil 4, the two ends parallel resistance shunt 7 of partial output winding 6.Secondary ironcore choke and divertor are into a single integrated structure by poured with epoxy resin, form the tandem current sensor.The utility model is not limited to two-stage.
Principle of work of the present utility model is summarized as follows: power current (as 2000A) is arranged when passing through in coil 1, magnetic flux changes in the iron core 2, in coil 3 and 4, will produce a less current (as 5A), corresponding variation also takes place by the magnetic flux in unshakable in one's determination 5, thereby in coil 6, produce a small electric current (as 0.02A), when this electric current passes through divertor 7, produce secondary voltage (as 1V) at its two ends.This voltage is proportional to the current value in the coil 1, and unshakable in one's determination within a large range unsaturated, and therefore the retention wire sexual intercourse has the characteristics of high precision, wide region.
Claims (2)
1, a kind of tandem formula current sensor, comprise iron core, coil, it is characterized in that sensor is provided with the two-stage ironcore choke at least, each grade ironcore choke is provided with input coil and the output winding on the iron core, the upper level output winding is connected with the next stage input coil, the output terminal parallel resistance shunt of final stage ironcore choke.
2, tandem formula current sensor according to claim 1 is characterized in that ironcore choke and divertor are into a single integrated structure with poured with epoxy resin.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201798004U CN201364356Y (en) | 2008-12-08 | 2008-12-08 | Cascade current sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008201798004U CN201364356Y (en) | 2008-12-08 | 2008-12-08 | Cascade current sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201364356Y true CN201364356Y (en) | 2009-12-16 |
Family
ID=41475024
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008201798004U Expired - Fee Related CN201364356Y (en) | 2008-12-08 | 2008-12-08 | Cascade current sensor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201364356Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570844A (en) * | 2012-02-15 | 2012-07-11 | 镇江天力变压器有限公司 | Control transformer for high-speed train |
| CN112088314A (en) * | 2018-05-08 | 2020-12-15 | 高通股份有限公司 | Differential current sensing with robust path, voltage offset removal and process, voltage, temperature (PVT) tolerance |
-
2008
- 2008-12-08 CN CNU2008201798004U patent/CN201364356Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102570844A (en) * | 2012-02-15 | 2012-07-11 | 镇江天力变压器有限公司 | Control transformer for high-speed train |
| CN112088314A (en) * | 2018-05-08 | 2020-12-15 | 高通股份有限公司 | Differential current sensing with robust path, voltage offset removal and process, voltage, temperature (PVT) tolerance |
| CN112088314B (en) * | 2018-05-08 | 2023-08-08 | 高通股份有限公司 | Differential current sensing with robust path, voltage offset removal and process, voltage, temperature (PVT) tolerance |
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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: 20091216 Termination date: 20171208 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |