CN105826067A - Current transformer - Google Patents
Current transformer Download PDFInfo
- Publication number
- CN105826067A CN105826067A CN201610339502.6A CN201610339502A CN105826067A CN 105826067 A CN105826067 A CN 105826067A CN 201610339502 A CN201610339502 A CN 201610339502A CN 105826067 A CN105826067 A CN 105826067A
- Authority
- CN
- China
- Prior art keywords
- iron core
- secondary winding
- current transformer
- windings
- winding
- Prior art date
- 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.)
- Granted
Links
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 114
- 238000004804 winding Methods 0.000 claims abstract description 108
- 229920006395 saturated elastomer Polymers 0.000 claims abstract description 13
- 230000004888 barrier function Effects 0.000 claims description 18
- 230000035699 permeability Effects 0.000 claims description 7
- 230000009466 transformation Effects 0.000 claims description 7
- 230000006698 induction Effects 0.000 abstract description 3
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 6
- 239000004020 conductor Substances 0.000 description 6
- 229910052802 copper Inorganic materials 0.000 description 6
- 239000010949 copper Substances 0.000 description 6
- 239000000463 material Substances 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000004907 flux Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920000728 polyester Polymers 0.000 description 2
- 239000010409 thin film Substances 0.000 description 2
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 230000005284 excitation Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 229910000889 permalloy Inorganic materials 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- 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
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
- H01F38/30—Constructions
-
- 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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
- H01F3/14—Constrictions; Gaps, e.g. air-gaps
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
- H01F2003/106—Magnetic circuits using combinations of different magnetic materials
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
The invention provides a current transformer which comprises iron cores and windings. The iron cores comprise the first iron core and the second iron cores, wherein an initial magnetic conductivity value of the first iron core is higher than that of the second iron core, a saturated magnetic induction value of the second iron core is higher than that of the first iron core, and the second iron core is provided with an air gap which penetrates through the second iron core in the radial direction; the windings comprise the first primary winding, the second primary winding, the first secondary winding and the second secondary winding, wherein the first primary winding and the first secondary winding are both wound on the first iron core, the second primary winding and the second secondary winding are both wound on the second iron core, the first primary winding and the second primary winding are connected in series, and the first secondary winding and the second secondary winding are connected in series. According to the current transformer, the first iron core has the high initial magnetic conductivity, the second iron core has the high saturated magnetic induction, and therefore the high anti-saturation capacity is achieved while the current transformer can maintain the high accuracy in the alternating current through the structure.
Description
Technical field
The present invention relates to electric detecting technology field, in particular to a kind of current transformer.
Background technology
At present, current transformer uses electromagnetic induction principle, and power system big electric current once is converted into the small area analysis of 5A or 1A, for protection, monitors and the secondary device such as measurement, be contact once with the visual plant of secondary.The measurement winding of current transformer is connected with electric energy meter, collectively forms the current measurement circuit of electric power meter, and therefore the performance quality of current transformer directly affects the accuracy of electric energy metrical, affects the fairness of electric energy trade settlement.
At some in particular cases, the primary current of current transformer may contain direct current or harmonic component, the even half-sinusoid after diode rectification.These non-power frequencies become branch to affect greatly the Transfer characteristic of tradition transformer and common double iron core transformer, and then affect the accuracy of electric energy metrical.
Summary of the invention
In consideration of it, the present invention proposes a kind of current transformer, it is intended to solve existing current transformer easily by DC component influence, cause the shortcoming that ratio difference and phase contrast are increased dramatically.
One aspect, the present invention proposes a kind of current transformer, and this device includes: iron core and winding；Wherein: described iron core includes the first iron core and the second iron core；And, the initial permeability value of described first iron core is higher than the initial permeability value of described second iron core, the saturated magnetic strength value of described second iron core is higher than the saturated magnetic strength value of described first iron core, and described second iron core offers and extends radially through in the air gap of described second iron core；Described winding includes the first windings, the second windings, the first Secondary Winding and the second Secondary Winding；Wherein, described the first windings and described first Secondary Winding are all set around described first iron core, described the second windings and described second Secondary Winding are all set around described second iron core, and, described the first windings and described the second winding series windings, described first Secondary Winding and described second Secondary Winding series winding.
Further, above-mentioned current transformer also includes: housing；Wherein, described first iron core is placed in described housing, and, described the first windings and described first Secondary Winding are all set around the outside of described housing.
Further, above-mentioned current transformer, it is additionally provided with the first insulating barrier outside described housing, described the first windings and described first Secondary Winding are all set around the outside of described first insulating barrier.
Further, above-mentioned current transformer, it is additionally provided with the second insulating barrier outside described second iron core, described the second windings and described second Secondary Winding are all set around the outside of described second insulating barrier.
Further, above-mentioned current transformer, described air gap is one.
Further, above-mentioned current transformer, described air gap number is multiple, and, multiple described air gaps are uniformly distributed along described second iron core circumference.
Further, above-mentioned current transformer, the width sum of described each air gap is 0.2mm～2mm.
Further, above-mentioned current transformer, the ratio of the number of turn of described the first windings and the number of turn of described first Secondary Winding is equal to the nominal transformation ratio preset；The ratio of the number of turn of described the second windings and the number of turn of described second Secondary Winding is equal to the nominal transformation ratio preset.
Further, above-mentioned current transformer, the sectional area of described second iron core is 1～3 times that described first core section is long-pending.
Further, above-mentioned current transformer, the contour shape of described first iron core is identical with the contour shape of described second iron core.
The current transformer of the present invention, first iron core has high initial magnetoconductivity, second iron core has high saturated magnetic strength and runs through air gap, this structure makes current transformer have stronger anti-saturation ability while maintaining the lower high accuracy of exchange, overcome tradition transformer and common double iron core transformer easily by DC component influence, ratio difference and phase contrast is caused to be increased dramatically, the shortcoming that even cannot normally work.
Accompanying drawing explanation
By reading the detailed description of hereafter preferred implementation, various other advantage and benefit those of ordinary skill in the art be will be clear from understanding.Accompanying drawing is only used for illustrating the purpose of preferred implementation, and is not considered as limitation of the present invention.And in whole accompanying drawing, it is denoted by the same reference numerals identical parts.In the accompanying drawings:
The structural representation of the current transformer that Fig. 1 provides for the embodiment of the present invention；
In the current transformer that Fig. 2 provides for the embodiment of the present invention, the structural representation of the air gap being opened on iron core.
Detailed description of the invention
It is more fully described the exemplary embodiment of the disclosure below with reference to accompanying drawings.Although accompanying drawing showing the exemplary embodiment of the disclosure, it being understood, however, that may be realized in various forms the disclosure and should not limited by embodiments set forth here.On the contrary, it is provided that these embodiments are able to be best understood from the disclosure, and complete for the scope of the present disclosure can be conveyed to those skilled in the art.It should be noted that in the case of not conflicting, the embodiment in the present invention and the feature in embodiment can be mutually combined.Describe the present invention below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
See the structural representation of the current transformer that Fig. 1, Fig. 1 provide for the embodiment of the present invention.In the current transformer provided for the embodiment of the present invention referring back to Fig. 2, Fig. 2, the structural representation of the air gap being opened on iron core.As it can be seen, this current transformer includes: iron core 1 and winding 2.
Wherein, iron core 1 includes the first iron core 11 and the second iron core 12；Further, the initial permeability value of the first iron core 11 is higher than the initial permeability value of the second iron core 12, and the saturated magnetic strength value of the second iron core 12 is higher than the saturated magnetic strength value of the first iron core 11, and the second iron core 12 offers and extends radially through in the air gap 3 of the second iron core 12.
Winding includes the first windings 21, the second winding the 22, first Secondary Winding 23 and second Secondary Winding 24.Wherein, the first windings 21 and the first Secondary Winding 23 are all set around the first iron core 11, and the second windings 22 and the second Secondary Winding 24 are all set around the second iron core 12, and, the first windings 21 and the second windings 22 are connected, and the first Secondary Winding 23 and the second Secondary Winding 24 are connected.
Specifically, the material of the first iron core 11 is the material with high initial magnetoconductivity, preferably permalloy, amorphous or nanometer crystal alloy；The material of the second iron core 12 is the material with high saturated magnetic strength, preferably cold-reduced silicon sheet, and the second iron core 12 offers and extends radially through in the air gap 3 of the second iron core 12.
In the present embodiment, iron core 1 includes first iron core 11 with high initial magnetoconductivity and has the second iron core 12 of high saturated magnetic strength, and the first windings 21 and the second windings 22 are connected, first Secondary Winding 23 and the second Secondary Winding 24 are connected, magnetic flux under normal communication is mainly distributed in the first iron core 11, its error, close to the transformer individually made of the first iron core 11, can reach 0.2S level；When DC content is higher, first iron core 11 is the most saturated, magnetic flux is mainly distributed in the second iron core 12, its error is close to the current transformer individually made of the second iron core 12, error under half-sinusoid can meet 1 grade of requirement, makes this current transformer have stronger anti-saturation ability, overcomes tradition transformer and common double iron core transformer easily by DC component influence, ratio difference and phase contrast is caused to be increased dramatically, the shortcoming that even cannot normally work.The air gap 3 offered on second iron core 12 can improve the anti-saturation ability of the second iron core 12.
Above-described embodiment can also include: housing (does not shows in figure).Wherein, the first iron core 11 is placed in housing, and, the first windings 21 and the first Secondary Winding 23 are all set around the outside of housing.Being additionally provided with the first insulating barrier (not showing in figure) outside housing, the first windings 21 and described first Secondary Winding 23 are all set around the outside of the first insulating barrier.
When being embodied as, being placed in housing by the first iron core 11, arrange the first insulating barrier outside housing, the mode arranging the first insulating barrier can be parcel polyester plastics thin film；The first windings 21 and the first Secondary Winding 23 are set around the outside of the first insulating barrier again, and winding can be selected for enamel-cover copper conductor, and, the line footpath of enamel-cover copper conductor is relevant with secondary current and secondary circuit impedance, secondary current is the biggest, and secondary circuit impedance is the biggest, and the line footpath of enamel-cover copper conductor is the biggest.
In the present embodiment, owing to the material of the first iron core 11 is more crisp, the first iron core 11 is placed in housing, the integrity of the first iron core 11 can be protected；Additionally, can also be provided with the second insulating barrier (not showing in figure) in above-described embodiment outside the second iron core 12, the second windings 22 and the second Secondary Winding 24 are all set around the outside of the second insulating barrier.
When being embodied as, arranging the second insulating barrier outside the first iron core 12, the mode arranging the second insulating barrier can be parcel polyester plastics thin film；The second windings 22 and the second Secondary Winding 24 are set around the outside of the second insulating barrier again, and winding can be selected for enamel-cover copper conductor, and, the line footpath of enamel-cover copper conductor is relevant with secondary current and secondary circuit impedance, secondary current is the biggest, and secondary circuit impedance is the biggest, and the line footpath of enamel-cover copper conductor is the biggest.
Additionally, in above-described embodiment, the number of air gap 3 can be one, it is also possible to for multiple.When the quantity of air gap 3 is multiple, multiple air gaps 3 are uniformly distributed along the second iron core 12 circumference.Preferably, the width sum of each described air gap 3 is 0.2mm～2mm.
In the present embodiment, the second iron core 12 offers air gap 3, improve the anti-saturation ability of the second iron core 12.
Additionally, in above-described embodiment, the ratio of the number of turn of the first windings 21 and the number of turn of the first Secondary Winding 23 is equal to the nominal transformation ratio preset, and the ratio of the number of turn 22 of the second windings and the number of turn of the second Secondary Winding 24 is equal to the nominal transformation ratio preset.When being embodied as, available mutual-inductor tester or no-load voltage ratio tester measure the ratio of second Secondary Winding 24 number of turn and the second winding 22 numbers of turn, if the error between itself and nominal transformation ratio exceedes ± 1%, the method for suitably increase and decrease second Secondary Winding 24 number of turn or point turn compensation can be used to adjust the proportional error of second Secondary Winding 24 number of turn and the second winding 22 numbers of turn.
In the present embodiment, adjusted the proportional error of second Secondary Winding 24 number of turn and the second winding 22 numbers of turn by the method for suitably increase and decrease second Secondary Winding 24 number of turn or point turn compensation so that it is error is better than ± 1%.
Additionally, in above-described embodiment, the sectional area of the second iron core 12 is 1～3 times of described first iron core 11 sectional area.When being embodied as, select suitable specified magnetic induction density B, find out corresponding magnetic field intensity H and magnetic permeability μ according to the excitation curve (BH curve) of the first iron core 11, according to the error calculation formula of current transformerCalculating the sectional area S of the first iron core 11, wherein ε is the error of transformer, Z2For secondary circuit impedance, l is the average length of magnetic path, and μ is the pcrmeability of iron core, and k is the lamination coefficient of iron core, N2For the Secondary Winding number of turn, S is the sectional area of iron core.The sectional area of the second iron core 12 is defined as 1～3 times of the first iron core 11 sectional area again.Sectional area further according to the first iron core 11 and the second iron core 12 chooses respective external diameter, internal diameter and height.
In the present embodiment, through experiment, when 1～3 times that the sectional area of the second iron core 12 is the first iron core 11 sectional area, the effect of Current Mutual Inductance is more preferable.
Additionally, in above-described embodiment, the cross sectional shape of the first iron core 11 and the cross sectional shape of the second iron core 12 are identical.When being embodied as, the cross sectional shape of the first iron core 11 and the cross sectional shape of the second iron core 12 can be annular, square or rectangle.
In sum, in the present embodiment, this current transformer first iron core has high initial magnetoconductivity, second iron core has high saturated magnetic strength and runs through air gap, this structure makes current transformer have stronger anti-saturation ability while maintaining the lower high accuracy of exchange, overcome tradition transformer and common double iron core transformer easily by DC component influence, cause ratio difference and phase contrast to be increased dramatically, the shortcoming that even cannot normally work.
Obviously, those skilled in the art can carry out various change and modification without departing from the spirit and scope of the present invention to the present invention.So, if these amendments of the present invention and modification belong within the scope of the claims in the present invention and equivalent technologies thereof, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. a current transformer, it is characterised in that including: iron core (1) and winding (2)；Wherein:
Described iron core includes the first iron core (11) and the second iron core (12)；And, the initial permeability value of described first iron core (11) is higher than the initial permeability value of described second iron core (12), the saturated magnetic strength value of described second iron core (12) is higher than the saturated magnetic strength value of described first iron core (11), and described second iron core (12) offers and extends radially through in the air gap (3) of described second iron core (12)；
Described winding includes the first windings (21), the second windings (22), the first Secondary Winding (23) and the second Secondary Winding (24)；Wherein, described the first windings (21) and described first Secondary Winding (23) are all set around described first iron core (11), described the second windings (22) and described second Secondary Winding (24) are all set around described second iron core (12), and, described the first windings (21) and described the second winding (22) series connection, described first Secondary Winding (23) and described second secondary windings in series (24).
Current transformer the most according to claim 1, it is characterised in that also include: housing；Wherein, described first iron core (11) is placed in described housing, and, described the first windings (21) and described first Secondary Winding (23) are all set around the outside of described housing.
Current transformer the most according to claim 2, it is characterized in that, being additionally provided with the first insulating barrier outside described housing, described the first windings (21) and described first Secondary Winding (23) are all set around the outside of described first insulating barrier.
Current transformer the most according to claim 2, it is characterized in that, being additionally provided with the second insulating barrier outside described second iron core (12), described the second windings (22) and described second Secondary Winding (24) are all set around the outside of described second insulating barrier.
Current transformer the most according to claim 1, it is characterised in that
Described air gap (3) is one.
Current transformer the most according to claim 5, it is characterised in that
Described air gap (3) is multiple, and, multiple described air gaps (3) are uniformly distributed along described second iron core (12) circumference.
7. according to the current transformer described in claim 5 or 6, it is characterised in that
The width sum of each described air gap (3) is 0.2mm～2mm.
Current transformer the most according to any one of claim 1 to 6, it is characterised in that
The ratio of the number of turn of described the first windings (21) and the number of turn of described first Secondary Winding (23) is default nominal transformation ratio；
The ratio of the number of turn (22) of described the second windings and the number of turn of described second Secondary Winding (24) is default nominal transformation ratio.
Current transformer the most according to any one of claim 1 to 6, it is characterised in that
The sectional area of described second iron core (12) is 1～3 times of described first iron core (11) sectional area.
Current transformer the most according to any one of claim 1 to 6, it is characterised in that
The contour shape of described first iron core (11) is identical with the contour shape of described second iron core (12).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610339502.6A CN105826067B (en) | 2016-05-19 | 2016-05-19 | Current Transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610339502.6A CN105826067B (en) | 2016-05-19 | 2016-05-19 | Current Transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105826067A true CN105826067A (en) | 2016-08-03 |
| CN105826067B CN105826067B (en) | 2023-12-26 |
Family
ID=56530237
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610339502.6A Active CN105826067B (en) | 2016-05-19 | 2016-05-19 | Current Transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105826067B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109036812A (en) * | 2017-06-12 | 2018-12-18 | 天津市中力神盾电子科技有限公司 | current collecting device |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4513274A (en) * | 1982-04-22 | 1985-04-23 | Lgz Landis & Gyr Zug Ag | Current transformer for measuring instruments |
| JP2001015365A (en) * | 1999-07-02 | 2001-01-19 | Toko Electric Corp | Current transformer |
| CN1688003A (en) * | 2005-06-23 | 2005-10-26 | 安泰科技股份有限公司 | Anti-DC component current transformer core and mfg. method and use thereof |
| CN201315222Y (en) * | 2008-11-17 | 2009-09-23 | 平高集团有限公司 | Mixed iron core and current mutual inductor |
| CN101692399A (en) * | 2009-09-30 | 2010-04-07 | 淄博元星电子有限公司 | Transient current transformer |
| CN201503765U (en) * | 2009-09-11 | 2010-06-09 | 何排枝 | Through type low-tension current mutual inductor |
| CN201859770U (en) * | 2010-11-09 | 2011-06-08 | 冯学学 | High-precision current transformer |
| CN202585088U (en) * | 2012-05-09 | 2012-12-05 | 广东四会互感器厂有限公司 | Current transformer with protecting and measuring functions |
| CN102969138A (en) * | 2012-12-11 | 2013-03-13 | 吉林省电力有限公司电力科学研究院 | 0.2Ss grade special high-voltage metering current transformer |
| CN103219140A (en) * | 2013-04-24 | 2013-07-24 | 南京江北自动化技术有限公司 | Current transformer |
| CN103337355A (en) * | 2013-07-09 | 2013-10-02 | 河北申科电子股份有限公司 | Zero-magnetic flux current transformer capable of preventing electricity from being stolen through high-intensity magnetic field |
| CN103646768A (en) * | 2013-12-24 | 2014-03-19 | 国家电网公司 | Active electronic current transformer |
| CN205789476U (en) * | 2016-05-19 | 2016-12-07 | 中国电力科学研究院 | Current transformer |
-
2016
- 2016-05-19 CN CN201610339502.6A patent/CN105826067B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4513274A (en) * | 1982-04-22 | 1985-04-23 | Lgz Landis & Gyr Zug Ag | Current transformer for measuring instruments |
| JP2001015365A (en) * | 1999-07-02 | 2001-01-19 | Toko Electric Corp | Current transformer |
| CN1688003A (en) * | 2005-06-23 | 2005-10-26 | 安泰科技股份有限公司 | Anti-DC component current transformer core and mfg. method and use thereof |
| CN201315222Y (en) * | 2008-11-17 | 2009-09-23 | 平高集团有限公司 | Mixed iron core and current mutual inductor |
| CN201503765U (en) * | 2009-09-11 | 2010-06-09 | 何排枝 | Through type low-tension current mutual inductor |
| CN101692399A (en) * | 2009-09-30 | 2010-04-07 | 淄博元星电子有限公司 | Transient current transformer |
| CN201859770U (en) * | 2010-11-09 | 2011-06-08 | 冯学学 | High-precision current transformer |
| CN202585088U (en) * | 2012-05-09 | 2012-12-05 | 广东四会互感器厂有限公司 | Current transformer with protecting and measuring functions |
| CN102969138A (en) * | 2012-12-11 | 2013-03-13 | 吉林省电力有限公司电力科学研究院 | 0.2Ss grade special high-voltage metering current transformer |
| CN103219140A (en) * | 2013-04-24 | 2013-07-24 | 南京江北自动化技术有限公司 | Current transformer |
| CN103337355A (en) * | 2013-07-09 | 2013-10-02 | 河北申科电子股份有限公司 | Zero-magnetic flux current transformer capable of preventing electricity from being stolen through high-intensity magnetic field |
| CN103646768A (en) * | 2013-12-24 | 2014-03-19 | 国家电网公司 | Active electronic current transformer |
| CN205789476U (en) * | 2016-05-19 | 2016-12-07 | 中国电力科学研究院 | Current transformer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109036812A (en) * | 2017-06-12 | 2018-12-18 | 天津市中力神盾电子科技有限公司 | current collecting device |
| CN109036812B (en) * | 2017-06-12 | 2024-04-12 | 天津市中力神盾电子科技有限公司 | Current acquisition device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105826067B (en) | 2023-12-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Jayalath et al. | Design, challenges, and trends of inductive power transfer couplers for electric vehicles: A review | |
| Kazimierczuk | High-frequency magnetic components | |
| Lee et al. | Development and validation of model for 95%-efficiency 220-W wireless power transfer over a 30-cm air gap | |
| US9412510B2 (en) | Three-phase reactor | |
| CN101206951B (en) | Energy-saving current transformer | |
| CN108039267B (en) | Current transformer | |
| Jiang et al. | AC loss measurements in HTS coil assemblies with hybrid coil structures | |
| You et al. | AC loss measurement and simulation in a REBCO coil assembly utilising low-loss magnetic flux diverters | |
| RU2320045C1 (en) | Transformer | |
| Vos | A magnetic core permeance model for inductive power harvesting | |
| Beddingfield et al. | Shielding of leakage flux induced losses in high power, medium frequency transformers | |
| CN205789476U (en) | Current transformer | |
| US11313917B2 (en) | Electric current sensor for detecting leakage current | |
| Balehosur et al. | Packet-to-packet variation of flux density in a three-phase, three-limb power transformer core | |
| CN105826067A (en) | Current transformer | |
| US8178998B2 (en) | Magnetically integrated current reactor | |
| CN112271061A (en) | Current transformer for metering | |
| CN106653339A (en) | Current transformer | |
| Mgunda | Optimization of Power Transformer Design: Losses, Voltage Regulation and Tests | |
| Lefevre et al. | Application of Dovvell method for nanocrystalline toroid high frequency transformers | |
| CN205845635U (en) | Annular is vertical around inductance | |
| Rossmanith et al. | Prediction of the leakage inductance in high frequency transformers | |
| CN201918253U (en) | Electric current mutual inductor | |
| CN209388829U (en) | The anti-DC current transformer iron core of electromagnetic type and current transformer | |
| CN206450738U (en) | Current transformer sensing head and current transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |