CN110085408B - Novel current transformer with small-sized wide input range - Google Patents
Novel current transformer with small-sized wide input range Download PDFInfo
- Publication number
- CN110085408B CN110085408B CN201910419844.2A CN201910419844A CN110085408B CN 110085408 B CN110085408 B CN 110085408B CN 201910419844 A CN201910419844 A CN 201910419844A CN 110085408 B CN110085408 B CN 110085408B
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- current transformer
- small
- framework
- input range
- wide input
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- 229910045601 alloy Inorganic materials 0.000 claims abstract description 42
- 239000000956 alloy Substances 0.000 claims abstract description 42
- 238000004804 winding Methods 0.000 claims abstract description 10
- 229910000976 Electrical steel Inorganic materials 0.000 claims description 3
- 229910000889 permalloy Inorganic materials 0.000 claims description 3
- 230000004907 flux Effects 0.000 abstract description 11
- 230000035699 permeability Effects 0.000 abstract description 4
- 230000002708 enhancing effect Effects 0.000 abstract description 2
- 239000011162 core material Substances 0.000 description 11
- 238000005259 measurement Methods 0.000 description 3
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Transformers For Measuring Instruments (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
The invention provides a novel current transformer with a small-size and wide input range, which comprises at least two frameworks with cavities inside, wherein the frameworks are provided with intervals and are connected through alloy sheets, each framework is provided with a winding, and the winding and the alloy sheets form a closed magnetic loop. Compared with the existing current transformer, the alloy sheet is connected to the framework, and the inside of the framework is provided with the cavity, so that the air magnetic core is realized, the magnetic permeability in the whole novel current transformer with a small and wide input range is low, and the magnetic flux is not easy to reach a saturation point, so that the measuring range is larger than that of the traditional current transformer, and the volume is smaller; and because of the use of the alloy sheet, the magnetic flux of the air in the cavity can be enhanced, thereby enhancing the output of the small current signal and improving the precision of the small current signal.
Description
Technical Field
The invention relates to the technical field of transformers, in particular to a novel current transformer with a small size and a wide input range.
Background
The current transformer is manufactured by an electromagnetic induction principle. The current transformer in the instrument for measuring current in the market at present is composed of a closed-loop magnetic core and a winding, the magnetic core material with high magnetic conductivity is selected to effectively transmit current signals, good linear relation exists between input signals in the current transformer and transmitted output signals between unsaturated magnetic cores, the current conversion precision is high, but the magnetic core with high magnetic conductivity is easy to reach a magnetic saturation state, once the magnetic core is saturated, the input signals and the output signals are not in linear proportion any more, and the larger the numerical range to be measured is, the larger the volume of the magnetic core is used, so that the external dimension of the current transformer is large.
Disclosure of Invention
The invention aims to solve the technical problem of providing a novel current transformer with a small size, a wide input range, a larger current measurement range and a smaller volume.
The technical problems are solved by the following technical scheme:
The utility model provides a novel current transformer of small-size wide input scope, includes at least two inside skeletons that are the cavity, be equipped with the interval between the skeleton and be connected through the alloy piece, each on the skeleton all be equipped with the winding, the winding with the alloy piece constitutes closed magnetic circuit.
Preferably, the two frameworks and the two alloy sheets are respectively arranged, and two ends of one framework are respectively connected with two ends of the other framework through one alloy sheet.
As a preferable scheme, clamping grooves are formed in the two ends of the framework, and the two ends of the alloy sheet are respectively clamped into the clamping grooves in the same end of the framework.
As a preferable scheme, the middle part of the alloy sheet is provided with deflection parts, and the deflection directions of the deflection parts of the two alloy sheets deviate.
As a preferable scheme, each framework is provided with a buckle, and the two alloy sheets are respectively fastened at the two ends of the framework through elastic buckle sheets arranged at the two ends of the buckle.
As a preferable scheme, the elastic buckle piece is provided with a clamping plate, and two ends of the framework are provided with limiting blocks corresponding to the clamping plate.
Preferably, the framework is plastic.
Preferably, the alloy sheet is silicon steel.
Preferably, the alloy sheet is permalloy.
Compared with the background technology, the novel current transformer with small size and wide input range has the beneficial effects that:
Because the alloy sheet is connected to the framework, and the inside of the framework is a cavity, the air magnetic core is realized, the magnetic permeability in the novel current transformer with the whole small-size and wide input range is lower, and the magnetic flux is not easy to reach a saturation point, so that the measuring range is larger than that of the traditional current transformer, and the volume is smaller; and because of the use of the alloy sheet, the magnetic flux of the air in the cavity can be enhanced, thereby enhancing the output of the small current signal and improving the precision of the small current signal.
Drawings
FIG. 1 is a schematic diagram of the overall structure of a small-sized wide input range novel current transformer according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a split structure of a small-sized wide input range novel current transformer according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of a skeleton according to an embodiment of the present invention;
FIG. 4 is a schematic view of the structure of an alloy sheet according to an embodiment of the present invention;
fig. 5 is a schematic structural view of a buckle according to an embodiment of the present invention.
1, A framework, 11, a clamping groove, 12, a limiting block, 2, a winding, 3, an alloy sheet, 31, a deflection part, 4, a buckle, 41, an elastic buckle sheet, 42 and a clamping plate.
Detailed Description
The following describes in further detail the embodiments of the present invention with reference to the drawings and examples. The following examples are illustrative of the invention and are not intended to limit the scope of the invention.
Referring to fig. 1 to 2, the embodiment of the invention is a novel current transformer with small size and wide input range, which comprises at least two frameworks 1 with hollow cavities inside, wherein the frameworks 1 are provided with a space and are connected through alloy sheets 3, each framework 1 is provided with a winding 2, and the winding 2 and the alloy sheets 3 form a closed magnetic loop. Based on this, the cavity inside skeleton 1 can regard as the air magnetic core, because the permeability of air is very low, thereby, the magnetic flux of this novel current transformer magnetic core increases in the linear working area's of BH scope, the magnetic flux is difficult for reaching the saturation point, measuring range is than traditional current transformer is bigger much, but because the magnetic flux of air magnetic core is unstable, the magnetic flux is little, the error that produces to the measurement of low current can be bigger, for this reason, this novel current transformer has still add alloy piece 3, the magnetic flux in the air can be strengthened to alloy piece 3, increase induced electromotive force output signal, improve the circumstances that low current error is bigger.
Further, as shown in fig. 1 to 4, the two skeletons 1 and the two alloy sheets 3 are provided, and both ends of one of the skeletons 1 are connected with both ends of the other skeleton 1 through one of the alloy sheets 3, respectively. Specifically, the two ends of the frameworks 1 are provided with clamping grooves 11, and the two ends of the alloy sheet 3 are respectively clamped into the clamping grooves 11 of the two frameworks 1, which are positioned at the same end, so as to realize the fixed connection of the alloy sheet 3 and the frameworks 1. In addition, the middle part of the alloy sheets 3 is also provided with deflection parts 31, and the deflection directions of the deflection parts 31 of the two alloy sheets 3 are deviated.
Still further, as shown in fig. 2 and 5, each frame 1 is provided with a buckle 4, and the buckle 4 respectively fastens the two alloy sheets 3 to two ends of the frame 1 through elastic buckling sheets 41 provided at two ends of the buckle 4. In addition, in order to prevent the buckle 4 from being separated from the framework 1, the clamping plates 42 are arranged on the elastic buckling pieces 41, the limiting blocks 12 corresponding to the clamping plates 42 are arranged at two ends of the framework 1, and when the buckle 4 and the framework 1 are buckled in place, the limiting blocks 12 reversely prop against the clamping plates 42, so that the buckle 4 can be prevented from being separated from the framework 1.
Preferably, the skeleton 1 in the embodiment of the present invention is plastic, and the alloy sheet 3 is silicon steel or permalloy.
In summary, the novel current transformer with small size and wide input range has the beneficial effects compared with the background technology:
Because the alloy sheet 3 is connected to the framework 1, and the inside of the framework 1 is a cavity, the air magnetic core is realized, the magnetic permeability in the novel current transformer with the whole small-size wide input range is low, and the magnetic flux is not easy to reach the saturation point, so that the measurement range is larger than that of the traditional current transformer, and the volume is smaller; and because the alloy sheet 3 is used, the magnetic flux of the air in the cavity can be enhanced, so that the output of a small current signal is enhanced, and the precision of the small current signal is improved.
The foregoing is merely a preferred embodiment of the present invention, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present invention, and these modifications and substitutions should also be considered as being within the scope of the present invention.
Claims (6)
1. The novel current transformer with the small-sized wide input range is characterized by comprising at least two frameworks with cavities inside, wherein the frameworks are provided with intervals and are connected through alloy sheets, each framework is provided with a winding, and the windings and the alloy sheets form a closed magnetic loop;
The two frameworks and the two alloy sheets are arranged, and two ends of one framework are respectively connected with two ends of the other framework through one alloy sheet;
clamping grooves are formed in two ends of the framework, and two ends of the alloy sheet are respectively clamped into the clamping grooves of two frameworks, which are positioned at the same end;
The middle part of the alloy sheet is provided with deflection parts, and the deflection directions of the deflection parts of the two alloy sheets deviate.
2. The small-sized wide input range novel current transformer according to claim 1, wherein each of the frameworks is provided with a buckle, and the two alloy sheets are respectively fastened at two ends of the framework by elastic fastening sheets arranged at two ends of the buckle.
3. The small-sized wide input range novel current transformer according to claim 2, wherein the elastic buckle piece is provided with a clamping plate, and two ends of the framework are provided with limiting blocks corresponding to the clamping plate.
4. The small, wide input range, novel current transformer of claim 1, wherein the skeleton is plastic.
5. The small, wide input range, novel current transformer of claim 1, wherein said alloy sheet is silicon steel.
6. A small, wide input range, novel current transformer according to claim 1 wherein said alloy sheet is permalloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910419844.2A CN110085408B (en) | 2019-05-20 | 2019-05-20 | Novel current transformer with small-sized wide input range |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910419844.2A CN110085408B (en) | 2019-05-20 | 2019-05-20 | Novel current transformer with small-sized wide input range |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110085408A CN110085408A (en) | 2019-08-02 |
| CN110085408B true CN110085408B (en) | 2024-04-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910419844.2A Active CN110085408B (en) | 2019-05-20 | 2019-05-20 | Novel current transformer with small-sized wide input range |
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| Country | Link |
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| CN (1) | CN110085408B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114121460B (en) * | 2022-01-24 | 2023-02-28 | 浙江华采科技有限公司 | Digital current transformer adopting low-permeability magnetic powder core |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2030373A (en) * | 1978-09-18 | 1980-04-02 | Siemens Ag | Current Transformers |
| DE4421789A1 (en) * | 1993-12-09 | 1995-06-14 | Siemens Ag | Electricity meter |
| CN201036148Y (en) * | 2006-10-29 | 2008-03-12 | 长沙同庆电气信息有限公司 | Helix tube type aircore coil current sensor |
| CN101834054A (en) * | 2009-03-13 | 2010-09-15 | 李小华 | Passive PFC inductor with high-strength enamelled aluminum wire structure |
| CN204556707U (en) * | 2015-05-07 | 2015-08-12 | 北京柏艾斯科技有限公司 | A kind of Novel photovoltaic leakage current sensor can measuring alternating current-direct current electric leakage |
| JP2016033505A (en) * | 2014-07-30 | 2016-03-10 | 甲神電機株式会社 | Current sensor |
| CN108344891A (en) * | 2018-01-19 | 2018-07-31 | 三峡大学 | A kind of high accuracy rectangular current coil of length and width certainty ratio |
| CN209804436U (en) * | 2019-05-20 | 2019-12-17 | 广州汉光电气股份有限公司 | novel small-size wide input range current transformer |
-
2019
- 2019-05-20 CN CN201910419844.2A patent/CN110085408B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB2030373A (en) * | 1978-09-18 | 1980-04-02 | Siemens Ag | Current Transformers |
| DE4421789A1 (en) * | 1993-12-09 | 1995-06-14 | Siemens Ag | Electricity meter |
| CN201036148Y (en) * | 2006-10-29 | 2008-03-12 | 长沙同庆电气信息有限公司 | Helix tube type aircore coil current sensor |
| CN101834054A (en) * | 2009-03-13 | 2010-09-15 | 李小华 | Passive PFC inductor with high-strength enamelled aluminum wire structure |
| JP2016033505A (en) * | 2014-07-30 | 2016-03-10 | 甲神電機株式会社 | Current sensor |
| CN204556707U (en) * | 2015-05-07 | 2015-08-12 | 北京柏艾斯科技有限公司 | A kind of Novel photovoltaic leakage current sensor can measuring alternating current-direct current electric leakage |
| CN108344891A (en) * | 2018-01-19 | 2018-07-31 | 三峡大学 | A kind of high accuracy rectangular current coil of length and width certainty ratio |
| CN209804436U (en) * | 2019-05-20 | 2019-12-17 | 广州汉光电气股份有限公司 | novel small-size wide input range current transformer |
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| CN110085408A (en) | 2019-08-02 |
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