CN106783116A - A kind of high reliability cobalt-based ferromagnetic core current transformer - Google Patents
A kind of high reliability cobalt-based ferromagnetic core current transformer Download PDFInfo
- Publication number
- CN106783116A CN106783116A CN201710076883.8A CN201710076883A CN106783116A CN 106783116 A CN106783116 A CN 106783116A CN 201710076883 A CN201710076883 A CN 201710076883A CN 106783116 A CN106783116 A CN 106783116A
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- China
- Prior art keywords
- insulation shell
- package casing
- magnetic core
- cover plate
- transformer
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Classifications
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- 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
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
- H01F1/055—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5
- H01F1/057—Alloys characterised by their composition containing rare earth metals and magnetic transition metals, e.g. SmCo5 and IIIa elements, e.g. Nd2Fe14B
-
- 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
- H01F27/02—Casings
-
- 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
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
- H01F38/30—Constructions
- H01F2038/305—Constructions with toroidal magnetic core
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Transformers For Measuring Instruments (AREA)
Abstract
The invention discloses a kind of high reliability cobalt-based ferromagnetic core current transformer, including cobalt-based ferromagnetic core, transformer secondary side winding, magnetic core isolation shell, magnetic core isolation cover plate, transformer package casing；The middle transformer package casing is filled with cured epoxy resin；Some discontinuous insulation shell fixed card slots are provided with the madial wall of the transformer package casing, and some insulation shell fixed card slots are symmetrical around the axis centre of the transformer package casing, some insulation shells for coordinating the insulation shell fixed card slots are provided with the lateral wall of the magnetic core isolation shell or the magnetic core isolation cover plate and fix buckle.The present invention can ensure that the position of current transformer core and attitude are not influenceed by the impulsive force of epoxy resin and buoyancy in filling epoxy resin, make using the current transformer product of epoxy encapsulation with relatively stable electric property.
Description
Technical field
The present invention relates to a kind of current transformer technical field, particularly a kind of high reliability cobalt-based ferromagnetic core Current Mutual Inductance
Device.
Background technology
Current transformer is widely used in modern industry, such as be applied to sensing power taking, the measurement for parameters of electric power
Deng；The structure of current transformer is mainly by the first winding of mutually insulated, Secondary Winding, iron core and framework, housing, terminals
The components such as son are constituted：The number of turn of its first winding is less, is directly series in power circuit, load current by once around
During group, the alternating flux sensing of generation produces the secondary current for reducing in proportion；The number of turn of Secondary Winding is more, with instrument, after
The secondary load of the current coils such as electrical equipment, transmitter connects to form closed-loop path；Because first winding and Secondary Winding have equal
Ampere-turn, than load impedance very little in current transformer actual motion, Secondary Winding is approached current transformer rated current
In short-circuit condition, equivalent to a transformer for short circuit operation.
There is easy to process, good excellent of electrical insulation properties using the current transformer of epoxy encapsulation in the prior art
Point, but when there is also filling epoxy resin using the current transformer of epoxy encapsulation, current transformer core is subject to ring
The impulsive force of oxygen tree fat and buoyancy are susceptible to the problem of deflection, so as to result in position and the appearance of current transformer core
State is difficult to control, and has large effect for the electric property of current transformer, is necessary to provide a kind of new technology for this
Scheme is overcoming above mentioned problem.
The content of the invention
In order to overcome the deficiencies in the prior art, the invention provides a kind of high reliability cobalt-based ferromagnetic core current transformer,
Position and attitude that current transformer core can be ensured in filling epoxy resin do not receive the impulsive force and buoyancy of epoxy resin
The influence of effect, makes using the current transformer product of epoxy encapsulation with relatively stable electric property.
The technical solution adopted for the present invention to solve the technical problems is：
A kind of high reliability cobalt-based ferromagnetic core current transformer, including be the cobalt-based iron of annular perpendicular to axial cross sectional shape
Magnetic core, the transformer secondary side winding being wrapped on the outside of the cobalt-based ferromagnetic core, it is sleeved on outside the transformer secondary side winding
Magnetic core isolation shell, coordinate the magnetic core isolation cover plate of the magnetic core isolation shell, be sleeved on the magnetic core isolation shell and the magnetic core
Transformer package casing on the outside of insulation cover plate；Element of the cobalt-based ferromagnetic core comprising following mass percent：Fe is 62.0%
~64.0%, Co be 23.5%~24.5%, Zn be 0.5%~1.0%, B be 3.5%~4.0%, Mn for 4.0%~5.0%, Cu be 3.8%
~4.2%, Nd are 0.1%~0.2%；The middle transformer package casing is filled with cured epoxy resin；The transformer encapsulation is outer
Some discontinuous insulation shell fixed card slots, and some insulation shell fixed card slots are provided with the madial wall of shell around described
The axis centre of transformer package casing is symmetrical, is set on the lateral wall of the magnetic core isolation shell or the magnetic core isolation cover plate
It is equipped with some insulation shells for coordinating the insulation shell fixed card slot and fixes buckle.
Used as the further improvement of above-mentioned technical proposal, the transformer package casing includes package casing bottom wall, encapsulation
Housing interior side-wall and package casing lateral wall, the package casing bottom wall be cirque structure, the package casing madial wall and
The package casing lateral wall is tubular structure；The lower end of the package casing madial wall connects the package casing bottom wall
Inner circular edge, the lower end of the package casing lateral wall connects the outer circular edge of the package casing bottom wall, some
The insulation shell fixed card slot is arranged at the inner side of the package casing lateral wall.
Used as the further improvement of above-mentioned technical proposal, the magnetic core isolation shell includes insulation shell bottom wall, insulation shell inner side
Wall and insulation shell lateral wall, the insulation shell bottom wall and the magnetic core isolation cover plate are cirque structure, in the insulation shell
Side wall and the insulation shell lateral wall are tubular structure；The upper end of the insulation shell madial wall connects the magnetic core isolation cover plate
Inner circular edge, the lower end of the insulation shell madial wall connects the inner circular edge of the insulation shell bottom wall；It is described exhausted
The upper end of edge shell lateral wall connects the outer circular edge of the magnetic core isolation cover plate, the lower end connection of the insulation shell lateral wall
The outer circular edge of the insulation shell bottom wall；Some insulation shells fix buckle and are arranged at the outer of the insulation shell lateral wall
Side.
Used as the further improvement of above-mentioned technical proposal, the inner circular edge of the magnetic core isolation cover plate is provided with and institute
State the cover plate inner tubular flange of the upper end interference fit of insulation shell madial wall, the outer circular edge of the magnetic core isolation cover plate
It is provided with the cover plate outer tubular flange coordinated with the threaded upper ends of the insulation shell lateral wall, the cover plate outer tubular flange
Outside be provided with cover plate external screw thread, the insulation shell is fixed on the inside of buckle and is provided with insulation shell internal thread, outside the cover plate
Screw thread and the insulation shell internal thread cooperate.
Compared with prior art, the beneficial effects of the invention are as follows：
A kind of high reliability cobalt-based ferromagnetic core current transformer provided by the present invention, by set insulation shell fixed card slot and absolutely
Edge shell fixes buckle fixed current transformer core, can ensure in filling epoxy resin the position of current transformer core with
Attitude is not influenceed by the impulsive force of epoxy resin and buoyancy, is made using the current transformer product of epoxy encapsulation
With relatively stable electric property.
Brief description of the drawings
The present invention is further described with reference to the accompanying drawings and examples.
Fig. 1 is a kind of cross-sectional view of high reliability cobalt-based ferromagnetic core current transformer of the present invention；
Fig. 2 is a kind of end face structure schematic diagram of high reliability cobalt-based ferromagnetic core current transformer of the present invention.
Specific embodiment
Referring to figs. 1 to Fig. 2, Fig. 1 to Fig. 2 is a structural representation for specific embodiment of the invention.
As shown in Figure 1 to Figure 2, a kind of high reliability cobalt-based ferromagnetic core current transformer, including perpendicular to the section of axial direction
The cobalt-based ferromagnetic core 1 of annular is shaped as, the transformer secondary side winding 2 in the outside of the cobalt-based ferromagnetic core 1 is wrapped in, is sleeved on
Magnetic core isolation shell 3, the magnetic core isolation cover plate 4 of the cooperation magnetic core isolation shell 3 outside the transformer secondary side winding 2, suit
In the transformer package casing 5 in the magnetic core isolation shell 3 and the outside of the magnetic core isolation cover plate 4；The cobalt-based ferromagnetic core 1 is included
The element of following mass percent：Fe is that 62.0%~64.0%, Co is that 23.5%~24.5%, Zn is that 0.5%~1.0%, B is 3.5%
~4.0%, Mn is that 4.0%~5.0%, Cu is that 3.8%~4.2%, Nd is 0.1%~0.2%；The middle transformer package casing 5 is filled
There is cured epoxy resin；Some discontinuous insulation shell fixed card slots are provided with the madial wall of the transformer package casing 5
6, and some insulation shell fixed card slots 6 are symmetrical around the axis centre of the transformer package casing 5, the magnetic core
The insulation shell of some cooperation insulation shell fixed card slots 6 is provided with the lateral wall of insulation shell 3 or the magnetic core isolation cover plate 4
Fixed buckle 7.
Specifically, the transformer package casing 5 includes that package casing bottom wall 51, package casing madial wall 52 and encapsulation are outer
Shell lateral wall 53, the package casing bottom wall 51 is cirque structure, the package casing madial wall 52 and the package casing
Lateral wall 53 is tubular structure；The lower end of the package casing madial wall 52 connects the inner side circle of the package casing bottom wall 51
Shape edge, the lower end of the package casing lateral wall 53 connects the outer circular edge of the package casing bottom wall 51, Ruo Gansuo
State the inner side that insulation shell fixed card slot 6 is arranged at the package casing lateral wall 53.The magnetic core isolation shell 3 includes insulation shell bottom
Wall 31, insulation shell madial wall 32 and insulation shell lateral wall 33, the insulation shell bottom wall 31 and the magnetic core isolation cover plate 4 are circle
Loop configuration, the insulation shell madial wall 32 and the insulation shell lateral wall 33 are tubular structure；The insulation shell madial wall
32 upper end connects the inner circular edge of the magnetic core isolation cover plate 4, and the lower end connection of the insulation shell madial wall 32 is described
The inner circular edge of insulation shell bottom wall 31；The upper end of the insulation shell lateral wall 33 connects the outer of the magnetic core isolation cover plate 4
Side circular edge, the lower end of the insulation shell lateral wall 33 connects the outer circular edge of the insulation shell bottom wall 31；Some institutes
State insulation shell and fix the outside that buckle 7 is arranged at the insulation shell lateral wall 33.The inner circular side of the magnetic core isolation cover plate 4
Edge is provided with the cover plate inner tubular flange 41 with the upper end interference fit of the insulation shell madial wall 32, the magnetic core isolation lid
The outer circular edge of plate 4 is provided with the cover plate outer tubular flange coordinated with the threaded upper ends of the insulation shell lateral wall 33
42, the outside of the cover plate outer tubular flange 42 is provided with cover plate external screw thread, and the inner side that the insulation shell fixes buckle 7 is set
There is insulation shell internal thread, the cover plate external screw thread and the insulation shell internal thread cooperate.
During assembling, first in the winding transformer secondary side winding 2 in the outside of the cobalt-based ferromagnetic core 1, then will twine
The cobalt-based ferromagnetic core 1 around the transformer secondary side winding 2 is put into the magnetic core isolation shell 3, the magnetic core is exhausted
Edge cover plate 4 is fixed together by screw thread with the magnetic core isolation shell 3, then by the magnetic core isolation shell 3 for assembling and institute
Magnetic core isolation cover plate 4 is stated to be fixed on the transformer and seal by the insulation shell fixed card slot 6 and insulation shell fixation buckle 7
In casing 5, last canned epoxy resin is simultaneously solidified.Test the Ts of the number of turn 1, test condition be 1K, 1.0 V, 30 Ω,
In the case that test temperature is 25 DEG C：The Curie temperature of the cobalt-based ferromagnetic core 1 is 630 DEG C, and saturation induction density is 1.1
Bs/T, initial permeability is 50000~80000.
Preferable implementation of the invention is illustrated above, certainly, the present invention can also be used and above-mentioned implementation
The different form of mode, the equivalent conversion that those of ordinary skill in the art are made on the premise of without prejudice to spirit of the invention
Or corresponding change, should all belong in protection scope of the present invention.
Claims (4)
1. a kind of high reliability cobalt-based ferromagnetic core current transformer, it is characterised in that：It is including the cross sectional shape perpendicular to axial direction
The cobalt-based ferromagnetic core of annular（1）, be wrapped in the cobalt-based ferromagnetic core（1）The transformer secondary side winding in outside（2）, be sleeved on
The transformer secondary side winding（2）Outer magnetic core isolation shell（3）, coordinate the magnetic core isolation shell（3）Magnetic core isolation cover plate
（4）, be sleeved on the magnetic core isolation shell（3）With the magnetic core isolation cover plate（4）The transformer package casing in outside（5）；It is described
Cobalt-based ferromagnetic core（1）Element comprising following mass percent：Fe is that 62.0%~64.0%, Co is that 23.5%~24.5%, Zn is
0.5%~1.0%, B is that 3.5%~4.0%, Mn is that 4.0%~5.0%, Cu is that 3.8%~4.2%, Nd is 0.1%~0.2%；In described
Transformer package casing（5）Filled with cured epoxy resin；The transformer package casing（5）Madial wall on be provided with it is some
Discontinuous insulation shell fixed card slot（6）, and some insulation shell fixed card slots（6）Around the transformer package casing
（5）Axis centre it is symmetrical, the magnetic core isolation shell（3）Or the magnetic core isolation cover plate（4）Lateral wall on be provided with
It is some to coordinate the insulation shell fixed card slot（6）Insulation shell fix buckle（7）.
2. a kind of high reliability cobalt-based ferromagnetic core current transformer according to claim 1, it is characterised in that：The mutual inductance
Device package casing（5）Including package casing bottom wall（51）, package casing madial wall（52）With package casing lateral wall（53）, it is described
Package casing bottom wall（51）It is cirque structure, the package casing madial wall（52）With the package casing lateral wall（53）
It is tubular structure；The package casing madial wall（52）Lower end connect the package casing bottom wall（51）Inner circular side
Edge, the package casing lateral wall（53）Lower end connect the package casing bottom wall（51）Outer circular edge, Ruo Gansuo
State insulation shell fixed card slot（6）It is arranged at the package casing lateral wall（53）Inner side.
3. a kind of high reliability cobalt-based ferromagnetic core current transformer according to claim 2, it is characterised in that：The magnetic core
Insulation shell（3）Including insulation shell bottom wall（31）, insulation shell madial wall（32）With insulation shell lateral wall（33）, the insulation shell bottom wall
（31）With the magnetic core isolation cover plate（4）It is cirque structure, the insulation shell madial wall（32）With insulation shell outside
Wall（33）It is tubular structure；The insulation shell madial wall（32）Upper end connect the magnetic core isolation cover plate（4）Inner side circle
Shape edge, the insulation shell madial wall（32）Lower end connect the insulation shell bottom wall（31）Inner circular edge；It is described exhausted
Edge shell lateral wall（33）Upper end connect the magnetic core isolation cover plate（4）Outer circular edge, the insulation shell lateral wall
（33）Lower end connect the insulation shell bottom wall（31）Outer circular edge；Some insulation shells fix buckle（7）Set
In the insulation shell lateral wall（33）Outside.
4. a kind of high reliability cobalt-based ferromagnetic core current transformer according to claim 3, it is characterised in that：The magnetic core
Insulation cover plate（4）Inner circular edge be provided with and the insulation shell madial wall（32）Upper end interference fit cover plate inner side
Tubulose flange（41）, the magnetic core isolation cover plate（4）Outer circular edge be provided with and the insulation shell lateral wall（33）'s
The cover plate outer tubular flange that threaded upper ends coordinate（42）, the cover plate outer tubular flange（42）Outside be provided with outside cover plate
Screw thread, the insulation shell fixes buckle（7）Inner side be provided with insulation shell internal thread, the cover plate external screw thread and the insulation shell
Internal thread cooperates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710076883.8A CN106783116A (en) | 2017-02-13 | 2017-02-13 | A kind of high reliability cobalt-based ferromagnetic core current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710076883.8A CN106783116A (en) | 2017-02-13 | 2017-02-13 | A kind of high reliability cobalt-based ferromagnetic core current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106783116A true CN106783116A (en) | 2017-05-31 |
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ID=58956001
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710076883.8A Pending CN106783116A (en) | 2017-02-13 | 2017-02-13 | A kind of high reliability cobalt-based ferromagnetic core current transformer |
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| Country | Link |
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| CN (1) | CN106783116A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107240492A (en) * | 2017-08-13 | 2017-10-10 | 安徽君华舜义恩佳非晶材料有限公司 | A kind of non-crystaline amorphous metal current transformer being easily assembled to |
| CN107492428A (en) * | 2017-08-13 | 2017-12-19 | 安徽君华舜义恩佳非晶材料有限公司 | A kind of non-crystaline amorphous metal transformer containing nanometer iron powder |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1174138A (en) * | 1997-08-27 | 1999-03-16 | Hitachi Ferrite Electronics Ltd | High-voltage transformer |
| CN203338962U (en) * | 2013-07-01 | 2013-12-11 | 刘娟 | Mutual inductor |
| CN104871269A (en) * | 2012-12-28 | 2015-08-26 | 株式会社自动网络技术研究所 | Reactor, converter, and power conversion device |
| CN204706456U (en) * | 2015-03-13 | 2015-10-14 | 长沙伟泰塑胶科技有限公司 | A kind of current transformer of strong diamagnetic field force |
-
2017
- 2017-02-13 CN CN201710076883.8A patent/CN106783116A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1174138A (en) * | 1997-08-27 | 1999-03-16 | Hitachi Ferrite Electronics Ltd | High-voltage transformer |
| CN104871269A (en) * | 2012-12-28 | 2015-08-26 | 株式会社自动网络技术研究所 | Reactor, converter, and power conversion device |
| CN203338962U (en) * | 2013-07-01 | 2013-12-11 | 刘娟 | Mutual inductor |
| CN204706456U (en) * | 2015-03-13 | 2015-10-14 | 长沙伟泰塑胶科技有限公司 | A kind of current transformer of strong diamagnetic field force |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107240492A (en) * | 2017-08-13 | 2017-10-10 | 安徽君华舜义恩佳非晶材料有限公司 | A kind of non-crystaline amorphous metal current transformer being easily assembled to |
| CN107492428A (en) * | 2017-08-13 | 2017-12-19 | 安徽君华舜义恩佳非晶材料有限公司 | A kind of non-crystaline amorphous metal transformer containing nanometer iron powder |
| CN107492428B (en) * | 2017-08-13 | 2019-05-10 | 安徽君华舜义恩佳非晶材料有限公司 | A kind of amorphous alloy mutual inductor containing nanometer iron powder |
| CN107240492B (en) * | 2017-08-13 | 2019-05-10 | 射阳伟龙电气有限公司 | A kind of amorphous alloy current transformer being easily assembled to |
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Application publication date: 20170531 |