CN203588832U - Eddy current-preventing and magnetic field-resisting current transformer structure of electric energy meter - Google Patents
Eddy current-preventing and magnetic field-resisting current transformer structure of electric energy meter Download PDFInfo
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- CN203588832U CN203588832U CN201320520512.1U CN201320520512U CN203588832U CN 203588832 U CN203588832 U CN 203588832U CN 201320520512 U CN201320520512 U CN 201320520512U CN 203588832 U CN203588832 U CN 203588832U
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- 230000005291 magnetic effect Effects 0.000 title abstract description 27
- 239000002436 steel type Substances 0.000 claims description 48
- 230000005292 diamagnetic effect Effects 0.000 claims description 32
- 239000000084 colloidal system Substances 0.000 claims description 4
- 238000007373 indentation Methods 0.000 claims description 4
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 229910052742 iron Inorganic materials 0.000 abstract description 5
- 238000011031 large-scale manufacturing process Methods 0.000 abstract description 4
- 238000005265 energy consumption Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
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Abstract
The utility model discloses an eddy current-preventing and magnetic field-resisting current transformer structure of an electric energy meter. The structure comprises a shell. A gap is arranged in the shell and the gap cuts the shell, thereby enabling the shell to be an unenclosed open-type shell. The gap enables the shell to be an unenclosed open-type structure so that the magnetic resistance of a magnetic circuit of a magnetic field is greatly increased and the generation of eddy current is reduced; the temperature rise of the shell is small and the power consumption is low; the precision of a current transformer assembly in the case of small current is increased, the iron loss of electric power lines is reduced, and thus the power consumption and precision of the whole meter are improved; moreover, the structure is simplified, the shell is composed of only one shell structure, the manufacturing process is simple, the production cost is low, and the requirements of large-scale production and popularization are satisfied; and at the same time, the magnetic field-resisting utilization request is met and the magnetic field-resisting capability is above the national standard.
Description
Technical field
The utility model relates to electric energy meter technical field, relates in particular to a kind of diamagnetic field current instrument transformer of anti-eddy current structure of electric energy meter.
Background technology
Electric energy meter is the instrumentation of electric power electric energy metrical, and current transformer is the critical component in electric energy meter, and playing power consumer is used to the current conversion of electric energy is the equivalent signal of telecommunication of light current for measuring use, passes to electric energy meter metering section and calculates electric flux.
Along with the increase of electric power energy consumption, the requirement of the stability of electric energy metrical, reliability, accuracy is more and more higher; Meanwhile, the requirement of the diamagnetic field of electrical energy meter electricity current transformer must reach the standard-required of Utilities Electric Co..The current transformer of diamagnetic of traditional electric energy meter, as shown in Figure 1, adopts the iron casing structure of sealing, needs an iron-clad, two parts of an iron-clad lid to form.Although this structure makes current transformer all stronger in the diamagnetic field energy power of six faces; But such structure also makes the magnetic resistance of iron-clad internal magnetic field magnetic circuit very little, and magnetic field intensity is very large, and then makes eddy current large, and power consumption is large, temperature rise, affects the performance of Current Transformer Assembly; Sometimes temperature rise is too high, even may have influence on the performance of electric energy meter, and during especially little electric current, the measuring accuracy of electric energy meter is affected.In addition, such structure due to housing adopt two parts, complex process, cost is therefore also higher.
Utility model content
The purpose of this utility model is to provide a kind of diamagnetic field current instrument transformer structure of electric energy meter, and the magnetic resistance of the magnetic field magnetic circuit in iron-clad is very large, and eddy current is little, low in energy consumption, temperature rise is little, designs simplification, cost, manufacturing process is simple, meets diamagnetic instructions for use simultaneously.
For reaching this object, the utility model by the following technical solutions:
The diamagnetic field current instrument transformer of an anti-eddy current structure for electric energy meter, comprises housing, and housing is provided with breach, and breach is cut into nonocclusive open type housing by housing.
Wherein, also comprise coil, primary wires, housing is also provided with primary wires entrance, primary wires outlet, and primary wires entrance, primary wires outlet are positioned on the wall body of both sides of housing, and coil is positioned at housing; Primary wires enters housing from primary wires entrance, then from the middle part of coil, passes, and then from primary wires outlet, leaves housing; Coil is provided with secondary lead terminal.
Preferably, the height of the end face of the indentation, there of housing is more than the height of the top of coil.
Wherein, it is U-shaped that housing is, and housing comprises semicircular cylinder iron-clad portion, left channel steel type iron-clad portion, right channel steel type iron-clad portion; In semicircular cylinder iron-clad portion, go to the bottom and be provided with and the concentric semicircle breach of above going to the bottom; The wall body in the left side of semicircle breach docks left channel steel type iron-clad portion, and the wall body on the right side of semicircle breach docks right channel steel type iron-clad portion; The opening of left channel steel type iron-clad portion, right channel steel type iron-clad portion is relative.
Preferably, semicircular cylinder iron-clad portion, left channel steel type iron-clad portion, right channel steel type iron-clad portion are that entirety is integrated.
Preferably, the width of semicircle breach is in below 1/3 of width of housing; The wall of the both sides of semicircle breach respectively both ends of the surface relative with left channel steel type iron-clad portion, right channel steel type iron-clad portion is tangent.
Preferably, the distance between the relative both ends of the surface of left channel steel type iron-clad portion, right channel steel type iron-clad portion is in below 1/3 of width of housing.
Preferably, the both sides of coil are provided with support portion; Support portion is overlapped on semicircle indentation, there.
Preferably, the height of the upper surface of left channel steel type iron-clad portion, right channel steel type iron-clad portion is more than the height of the top of coil.
Preferably, coil is bonded in the inside of housing by colloid, and coil is provided with secondary lead terminal.
The beneficial effects of the utility model are: a kind of diamagnetic field current instrument transformer of anti-eddy current structure of electric energy meter, comprise housing, and housing is provided with breach, and breach is cut into nonocclusive open type housing by housing.Breach makes housing become nonocclusive Open architecture, thereby has greatly increased the magnetic resistance of magnetic field magnetic circuit, has reduced the generation of eddy current; Make the temperature rise of housing little, low in energy consumption; Improved the precision of Current Transformer Assembly when little electric current, reduced the iron loss of power circuit, and then the power consumption of whole table and precision are all improved; And designs simplification, housing is only comprised of a shell structure, and manufacturing process is simple, and production cost is low, meets large-scale production and universal requirement; Meet diamagnetic instructions for use, diamagnetic field energy power is more than GB simultaneously.
Accompanying drawing explanation
For technical scheme clearer, that the utility model embodiment is described effectively, the accompanying drawing of required use in embodiment is briefly described, self-explantoryly be, accompanying drawing in the following describes is only embodiment more of the present utility model, for those skilled in the art, without paying under the prerequisite of creative work, can also make other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of the diamagnetic field current instrument transformer structure of the electric energy meter of prior art.
Fig. 2 is the structural representation of the diamagnetic field current instrument transformer of the anti-eddy current structure of a kind of electric energy meter of the utility model.
Fig. 3 is the structural representation of the housing of the diamagnetic field current instrument transformer of the anti-eddy current structure of a kind of electric energy meter of the utility model.
In figure:
1-housing; 11-semicircular cylinder iron-clad portion; The left channel steel type iron-clad of 121-portion; The right channel steel type iron-clad of 122-portion; 2-breach; 3-coil; 4-primary wires; 5-primary wires entrance; The outlet of 6-primary wires; 7-secondary lead terminal; 8-support portion; 9-iron-clad lid.
Embodiment
The utility model provides a kind of diamagnetic field current instrument transformer of anti-eddy current structure of electric energy meter, in order to make, those of skill in the art are clearer understands the utility model scheme, and make the above-mentioned object of the utility model, feature, beneficial effect can more understand, understandable, below in conjunction with accompanying drawing 2～3 and embodiment, the utility model is described in further detail.
The diamagnetic field current instrument transformer of an anti-eddy current structure for electric energy meter, comprises housing 1, and housing 1 is provided with breach 2, and breach 2 is cut into nonocclusive open type housing by housing 1.
In the present embodiment, also comprise coil 3, primary wires 4, housing 1 is also provided with primary wires entrance 5, primary wires outlet 6, and primary wires entrance 5, primary wires outlet 6 are positioned on the wall body of both sides of housing 1, and coil is positioned at housing 1; Primary wires 4 enters housing 1 from primary wires entrance 5, then from the middle part of coil 3, passes, and then from primary wires outlet 6, leaves housing 1; Coil 3 is provided with secondary lead terminal 7.
Breach 2 makes housing 1 become nonocclusive Open architecture, thereby has greatly increased the magnetic resistance of magnetic field magnetic circuit, has reduced the generation of eddy current; Make the temperature rise of housing 1 little, low in energy consumption; Improved the precision of Current Transformer Assembly when little electric current, reduced the iron loss of power circuit, and then the power consumption of whole table and precision are all improved; And designs simplification, housing 1 is only comprised of a shell structure, and manufacturing process is simple, and production cost is low, meets large-scale production and universal requirement; Meet diamagnetic instructions for use, diamagnetic field energy power is more than GB simultaneously.
The diamagnetic field current instrument transformer of tradition shown in current transformer structure and Fig. 1 of electric energy meter of the present utility model compares after tested, take 5(60) A electric energy meter current transformer is example, current circuit power-dissipation-reduced 74.6% during by 72A electric current 50Hz alternating current.
The height of the end face at breach 2 places of the present embodiment middle shell 1 more than the height of the top of coil 3, thereby reduced the height of housing 1, the volume of current transformer is reduced.
The effect of the magnetic-field impact of the said structure of current transformer has reduced, under common mounting condition, can guarantee the upper plan range electric energy meter end face distance >=45mm of current transformer, the leading flank of current transformer is apart from electric energy meter leading flank >=50mm, the trailing flank of current transformer is apart from the trailing flank >=170mm of electric energy meter, thereby the test requirements document that the outside constant magnetic induction of 300 ± 30mT that can make electric energy meter meet Q/GDW1827-2013 < < three-phase intelligent electric-energy meter technical specification > > is disturbed.
Embodiment bis-
The diamagnetic field current instrument transformer of an anti-eddy current structure for electric energy meter, comprises housing 1, and housing 1 is provided with breach 2, and breach 2 is cut into nonocclusive open type housing by housing 1.
In the present embodiment, housing 1 is U-shaped, and housing 1 comprises semicircular cylinder iron-clad portion 11, left channel steel type iron-clad portion 121, right channel steel type iron-clad portion 122; In semicircular cylinder iron-clad portion 11, go to the bottom and be provided with and the concentric semicircle breach of above going to the bottom; The wall body in the left side of semicircle breach docks left channel steel type iron-clad portion 121, and the wall body on the right side of semicircle breach docks right channel steel type iron-clad portion 122; The opening of left channel steel type iron-clad portion 121, right channel steel type iron-clad portion 122 is relative.
The non-binding space at the corresponding left channel steel type iron-clad of breach 2 portion 121, right channel steel type iron-clad portion 122 tops, thereby the top that makes current transformer is wide-open, thereby the magnetic circuit that makes housing 1 is discrete, greatly increased the magnetic resistance of magnetic field magnetic circuit, reduced the generation of eddy current; Reduce primary side impedance loop, reduced the iron loss of power circuit, make the temperature rise of housing 1 little, low in energy consumption; Improved the precision of Current Transformer Assembly when little electric current; And then the power consumption of whole table and precision are all improved; And designs simplification, housing 1 is only comprised of a shell structure, and manufacturing process is simple, and production cost is low, meets large-scale production and universal requirement; Meet diamagnetic instructions for use, diamagnetic field energy power is more than GB simultaneously.
The wall of the both sides of semicircle breach respectively both ends of the surface relative with left channel steel type iron-clad portion 121, right channel steel type iron-clad portion 122 is tangent, the width of semicircle breach is in below 1/3 of width of current transformer, thereby makes distance between the relative both ends of the surface of left channel steel type iron-clad portion 121, right channel steel type iron-clad portion 122 below 1/3 of width at housing 1.
In the present embodiment, also comprise coil 3, the both sides of coil 3 are provided with support portion 8; Coil 3 is positioned at the inside of housing 1, and support portion 8 is overlapped on semicircle indentation, there.
The height of the upper surface of left channel steel type iron-clad portion 121, right channel steel type iron-clad portion 122 is more than the height of the top of coil 3.
Coil 3 is bonded in the inside of housing 1 by colloid, coil 3 is provided with secondary lead terminal 7.
Space between semicircle breach and left channel steel type iron-clad portion 121, right channel steel type iron-clad portion 122, composition trough body structure, thus make the also not sealing completely of both sides, front and back of current transformer, further improved the magnetic resistance of housing 1, improved anti-eddy current effect.
In the present embodiment, semicircular cylinder iron-clad portion 11, left channel steel type iron-clad portion 121, right channel steel type iron-clad portion 122 are that entirety is integrated.The top of housing 1 is open, than diamagnetic traditional iron-clad part, has reduced, and coil 3 is bonded in the inside of housing 1 by colloid, and part reduces, and assembly technology is simple, makes cost.
The effect of the magnetic-field impact of the said structure of current transformer has reduced, under common mounting condition, the end face of the opening of current transformer, away from two sides, front and back are enough from watchcase outer surface distance, can guarantee plan range electric energy meter end face distance >=45mm on current transformer, current transformer leading flank distance table leading flank >=50mm, current transformer trailing flank distance table trailing flank >=170mm, can meet the outside constant magnetic induction interference test requirement of 300 ± 30mT of Q/GDW1827-2013 < < three-phase intelligent electric-energy meter technical specification > >.
Know-why of the present utility model has below been described in conjunction with specific embodiments.These are described is in order to explain principle of the present utility model, and can not be interpreted as by any way the restriction to the utility model protection range.Based on explanation herein, those skilled in the art does not need to pay performing creative labour can associate other embodiment of the present utility model, within these modes all will fall into protection range of the present utility model.
Claims (9)
1. the diamagnetic field current instrument transformer of an anti-eddy current structure for electric energy meter, comprises housing (1), it is characterized in that, described housing (1) is provided with breach (2), and described breach (2) is cut into nonocclusive open type housing by housing (1); Described housing (1) is U-shaped, and described housing (1) comprises semicircular cylinder iron-clad portion (11), left channel steel type iron-clad portion (121), right channel steel type iron-clad portion (122); In described semicircular cylinder iron-clad portion (11), go to the bottom and be provided with and the concentric semicircle breach of above going to the bottom; The wall body in the left side of described semicircle breach docks left channel steel type iron-clad portion (121), and the wall body on the right side of described semicircle breach docks right channel steel type iron-clad portion (122); The opening of described left channel steel type iron-clad portion (121), right channel steel type iron-clad portion (122) is relative.
2. the diamagnetic field current instrument transformer of anti-eddy current as claimed in claim 1 structure, it is characterized in that, also comprise coil (3), primary wires (4), described housing (1) is also provided with primary wires entrance (5), primary wires outlet (6), described primary wires entrance (5), primary wires outlet (6) are positioned on the wall body of both sides of described housing (1), and described coil (3) is positioned at described housing (1); Described primary wires (4) enters housing (1) from primary wires entrance (5), then from the middle part of coil (3), passes, and then from primary wires outlet (6), leaves housing (1); Described coil (3) is provided with secondary lead terminal (7).
3. the diamagnetic field current instrument transformer of anti-eddy current as claimed in claim 2 structure, is characterized in that, the height of the end face that the breach (2) of described housing (1) is located is more than the height of the top of coil (3).
4. the diamagnetic field current instrument transformer of anti-eddy current as claimed in claim 1 structure, is characterized in that, described semicircular cylinder iron-clad portion (11), left channel steel type iron-clad portion (121), right channel steel type iron-clad portion (122) are that entirety is integrated.
5. the diamagnetic field current instrument transformer of anti-eddy current as claimed in claim 1 structure, is characterized in that, the wall of the both sides of described semicircle breach respectively both ends of the surface relative with described left channel steel type iron-clad portion (121), right channel steel type iron-clad portion (122) is tangent.
6. the diamagnetic field current instrument transformer of anti-eddy current as claimed in claim 5 structure, it is characterized in that, the distance between the relative both ends of the surface of described left channel steel type iron-clad portion (121), right channel steel type iron-clad portion (122) is in below 1/3 of width of described housing (1).
7. the diamagnetic field current instrument transformer of anti-eddy current as claimed in claim 5 structure, is characterized in that, also comprises coil (3), and the both sides of described coil (3) are provided with support portion (8); Described coil (3) is positioned at the inside of described housing (1), and described support portion (8) are overlapped on described semicircle indentation, there.
8. the diamagnetic field current instrument transformer of anti-eddy current as claimed in claim 7 structure, is characterized in that, the height of the upper surface of described left channel steel type iron-clad portion (121), right channel steel type iron-clad portion (122) is more than the height of the top of described coil (3).
9. the diamagnetic field current instrument transformer of anti-eddy current as claimed in claim 7 structure, is characterized in that, described coil (3) is bonded in the inside of described housing (1) by colloid, and described coil (3) is provided with secondary lead terminal (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320520512.1U CN203588832U (en) | 2013-08-23 | 2013-08-23 | Eddy current-preventing and magnetic field-resisting current transformer structure of electric energy meter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320520512.1U CN203588832U (en) | 2013-08-23 | 2013-08-23 | Eddy current-preventing and magnetic field-resisting current transformer structure of electric energy meter |
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| Publication Number | Publication Date |
|---|---|
| CN203588832U true CN203588832U (en) | 2014-05-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320520512.1U Expired - Fee Related CN203588832U (en) | 2013-08-23 | 2013-08-23 | Eddy current-preventing and magnetic field-resisting current transformer structure of electric energy meter |
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| CN (1) | CN203588832U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106411107A (en) * | 2015-08-03 | 2017-02-15 | 株式会社日立制作所 | Power conversion apparatus |
| CN106783114A (en) * | 2016-12-23 | 2017-05-31 | 镇江亨通电器有限公司 | A kind of special Large Copacity current transformer of gas-filling cabinet |
| CN107907730A (en) * | 2017-11-09 | 2018-04-13 | 合肥中科电器科学研究有限责任公司 | Zero-flux Hall large-current sensor device |
| CN113035540A (en) * | 2021-02-01 | 2021-06-25 | 青岛市产品质量监督检验研究院 | Current transformer structure based on magnetic field coil |
-
2013
- 2013-08-23 CN CN201320520512.1U patent/CN203588832U/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106411107A (en) * | 2015-08-03 | 2017-02-15 | 株式会社日立制作所 | Power conversion apparatus |
| CN106411107B (en) * | 2015-08-03 | 2018-10-12 | 株式会社日立制作所 | Power inverter |
| CN106783114A (en) * | 2016-12-23 | 2017-05-31 | 镇江亨通电器有限公司 | A kind of special Large Copacity current transformer of gas-filling cabinet |
| CN107907730A (en) * | 2017-11-09 | 2018-04-13 | 合肥中科电器科学研究有限责任公司 | Zero-flux Hall large-current sensor device |
| CN113035540A (en) * | 2021-02-01 | 2021-06-25 | 青岛市产品质量监督检验研究院 | Current transformer structure based on magnetic field coil |
| CN113035540B (en) * | 2021-02-01 | 2022-05-24 | 青岛市产品质量监督检验研究院 | Current transformer structure based on magnetic field coil |
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| 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: 20140507 Termination date: 20210823 |
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| CF01 | Termination of patent right due to non-payment of annual fee |