CN215220488U - Double-iron-core DC component-resistant miniature current transformer - Google Patents
Double-iron-core DC component-resistant miniature current transformer Download PDFInfo
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- CN215220488U CN215220488U CN202121527509.3U CN202121527509U CN215220488U CN 215220488 U CN215220488 U CN 215220488U CN 202121527509 U CN202121527509 U CN 202121527509U CN 215220488 U CN215220488 U CN 215220488U
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Abstract
The utility model discloses an anti miniature current transformer of direct current component of two iron cores, including insulating casing, two iron core windings and four leading-out terminals, the insulating casing middle part is equipped with the through wires hole that link up, be equipped with the reference column in the insulating casing, two iron core windings are located in the reference column, and the reference column is equipped with the cardboard that a plurality of equidistance were arranged along the circumferencial direction, are equipped with the positioning channel section of being convenient for place two iron core windings on the cardboard, two iron core windings include super brilliant iron core, silicon steel sheet iron core and coil winding. The double-iron-core winding adopts a composite structure in which the ultra-microcrystalline iron core and the silicon steel sheet iron core are mutually overlapped, so that the direct-current component resistance effect and the measurement precision of the current transformer are effectively improved; the arrangement of the positioning columns and the positioning clamping grooves can facilitate quick positioning and assembly of the double-iron-core winding, and when the assembly is facilitated, the installation stability of the double-iron-core winding is effectively improved, so that the double-iron-core winding is prevented from shifting when being poured and packaged, and the production quality of the current transformer is influenced.
Description
Technical Field
The utility model relates to a mutual-inductor field especially relates to a miniature current transformer of anti direct current component of two iron cores.
Background
With the development of power electronic technology, various nonlinear electric appliances are increasingly used by low-voltage power consumers, and a large amount of harmonic current containing direct-current components is generated in a low-voltage power grid. The current transformer is a sampling device of the electric instrument, is positioned at the foremost end, and has direct influence on the measurement precision of the electric instrument. The current transformer for metering requires high measurement accuracy and good electromagnetic interference resistance, and the current transformer on the market generally adopts a single-ultracrystalline iron core or single-silicon steel sheet iron core structure, so that the direct-current component resistance effect is poor, and the accuracy is low, thereby influencing the use effect of the current transformer; in addition, the iron core of the current transformer is generally encapsulated in the shell in a manner of pouring epoxy resin, and the epoxy resin easily displaces the iron core in the shell during pouring, so that the production quality of the current transformer is affected.
Accordingly, the prior art is deficient and needs improvement.
SUMMERY OF THE UTILITY MODEL
The utility model discloses the technical problem that will solve is: the double-iron-core direct-current-component-resistant micro current transformer is small in size, accurate in positioning, good in direct-current-component-resistant effect and high in precision, and the product yield is effectively improved.
The technical scheme of the utility model as follows: a double-iron-core direct-current-component-resistant miniature current transformer comprises an insulating shell, double-iron-core windings and four leading-out terminals, wherein a through threading hole is formed in the middle of the insulating shell, a containing cavity is formed in the insulating shell, a positioning column is arranged in the middle of the containing cavity, the double-iron-core windings are arranged in the positioning column, a plurality of clamping plates which are arranged at equal intervals are arranged in the positioning column along the circumferential direction, and positioning clamping grooves which are convenient for placing the double-iron-core windings are formed in the clamping plates;
the double-iron-core winding comprises an ultra-microcrystalline iron core, a silicon steel sheet iron core and a coil winding, the ultra-microcrystalline iron core and the silicon steel sheet iron core are of annular structures, a positioning hole is formed in the middle of each of the ultra-microcrystalline iron core and the silicon steel sheet iron core and penetrates through the positioning column, the ultra-microcrystalline iron cores are coaxially stacked on the top of the silicon steel sheet iron core, the coil winding is wound on the ultra-microcrystalline iron core and the silicon steel sheet iron core, the four leading-out terminals are arranged on the four corners of the bottom of the insulating shell, and the four leading-out terminals of the coil winding are respectively connected with one leading-out terminal.
By adopting the technical scheme, in the double-iron-core DC component resistant micro current transformer, the number of winding turns of the coil winding is 1500-2500.
By adopting the technical scheme, in the double-iron-core direct-current-component-resistant micro current transformer, the insulating shell is in an omega-shaped structure.
By adopting the technical scheme, in the double-iron-core direct-current component resistant micro current transformer, the width of the positioning clamping groove is greater than the wall thickness of the double-iron-core winding.
By adopting the technical scheme, in the double-iron-core direct-current component resistant micro current transformer, the insulating shell, the positioning column and the clamping plate are of an integrally formed structure.
By adopting the technical scheme, in the double-iron-core direct-current component resistant micro current transformer, epoxy resin is filled between the insulating shell and the double-iron-core winding.
The utility model has the advantages that: the double-iron-core winding adopts the structure that the ultracrystalline iron core and the silicon steel sheet iron core are coaxially superposed with each other, so that the direct-current component resistance effect and the measurement precision of the current transformer are effectively improved; the arrangement of the positioning columns and the positioning clamping grooves can facilitate the rapid positioning and assembly of the double-iron-core winding, the assembly efficiency is improved, meanwhile, the installation stability of the double-iron-core winding is effectively improved, and the double-iron-core winding is prevented from shifting during pouring and packaging, so that the production quality of the current transformer is influenced; the whole structure is simple, the volume is small, the direct current component resistance effect is good, the precision is high, and the device can be popularized and used.
Drawings
Fig. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is a schematic view of the internal structure of the present invention;
fig. 3 is a schematic diagram of the dual-core winding structure of the present invention.
Detailed Description
The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "inside", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
As shown in fig. 1 to 3, a miniature current transformer of two iron core anti direct current component, includes insulating casing 1, two iron core windings 2 and four leading-out terminals 3, insulating casing 1 middle part is equipped with through wires hole 10 that link up, be equipped with in the insulating casing 1 and hold cavity 100, it is equipped with reference column 11 to hold cavity 100 middle part, two iron core windings 2 are located in reference column 11, just reference column 11 is equipped with the cardboard 12 that a plurality of equidistance were arranged along the circumferencial direction, be equipped with the positioning channel groove 120 of being convenient for place two iron core windings 2 on the cardboard 12. In this embodiment, the setting of reference column 11 can improve current transformer's assembly efficiency, during the assembly, only need with two iron core winding 2 cover establish on reference column 11 can, simple and convenient, positioning channel section 120's setting can prevent that two iron core winding 2 from taking place to shift when the watering encapsulation to influence current transformer's production quality.
As shown in fig. 2, further, the width of the positioning slot 120 is greater than the wall thickness of the dual core winding 2. In this embodiment, the width of the positioning slot 120 is greater than the wall thickness of the dual-core winding 2, which is beneficial to positioning and installing the dual-core winding 2.
Furthermore, the insulating housing 1, the positioning column 11 and the clamping plate 12 are integrally formed. In this embodiment, the insulating housing 1, the positioning column 11 and the clamping plate 12 are integrally formed, so that the overall structural strength can be improved.
Further, an epoxy resin (not shown) is filled between the insulating housing 1 and the dual core winding 2. In this embodiment, epoxy resin is poured and filled between the insulating housing 1 and the dual-core winding 2, so that the heat resistance and the electrical insulation of the current transformer can be effectively improved.
As shown in fig. 2 and 3, the dual core winding 2 includes an ultra-microcrystalline iron core 21, a silicon steel sheet iron core 22, and a coil winding 23, where the ultra-microcrystalline iron core 21 and the silicon steel sheet iron core 22 are both in an annular structure, a positioning hole 200 is formed in the middle of the ultra-microcrystalline iron core 21 and the silicon steel sheet iron core 22, the positioning hole 200 is formed in the positioning column 11, the ultra-microcrystalline iron core 21 is coaxially stacked on the top of the silicon steel sheet iron core 22, the coil winding 23 is formed on the ultra-microcrystalline iron core 21 and the silicon steel sheet iron core 22, the four lead terminals 3 are arranged at four corners of the bottom of the insulating housing 1, and four lead terminals of the coil winding 23 are respectively connected to one lead terminal 3. In this embodiment, the ultra-crystalline iron core 21 has a high magnetic permeability, and the silicon steel sheet iron core 22 has a good dc component resistance, and has a certain complementarity between the two, so that the dc component resistance effect and the measurement accuracy of the shunt transformer can be effectively improved, and the shunt transformer can be applied to electric power instruments with high requirements on dc component resistance.
Furthermore, the number of winding turns of the coil winding 23 is 1500-2500. In the present embodiment, the number of turns of the coil winding 23 is 2000. Of course, it should be noted that, the user may also set the coil winding 23 with other turns according to actual needs, and this embodiment is not limited too much.
As shown in fig. 1, further, the insulating housing 1 has an Ω -shaped structure. In this embodiment, the insulating housing 1 having an omega-shaped structure makes the overall size smaller and more convenient for installation and use.
The utility model has the advantages that: the double-iron-core winding adopts the structure that the ultracrystalline iron core and the silicon steel sheet iron core are coaxially superposed with each other, so that the direct-current component resistance effect and the measurement precision of the current transformer are effectively improved; the arrangement of the positioning columns and the positioning clamping grooves can facilitate the rapid positioning and assembly of the double-iron-core winding, the assembly efficiency is improved, meanwhile, the installation stability of the double-iron-core winding is effectively improved, and the double-iron-core winding is prevented from shifting during pouring and packaging, so that the production quality of the current transformer is influenced; the whole structure is simple, the volume is small, the direct current component resistance effect is good, the precision is high, and the device can be popularized and used.
The above description is only exemplary of the present invention and should not be construed as limiting the present invention, and any modifications, equivalents and improvements made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.
Claims (6)
1. The utility model provides a miniature current transformer of two iron core anti direct current component which characterized in that: the wire-passing type double-iron-core winding wire connector comprises an insulating shell, double-iron-core windings and four leading-out terminals, wherein a through wire hole is formed in the middle of the insulating shell, a containing cavity is formed in the insulating shell, a positioning column is arranged in the middle of the containing cavity, the double-iron-core windings are arranged in the positioning column, a plurality of clamping plates which are arranged at equal intervals are arranged on the positioning column along the circumferential direction, and positioning clamping grooves which are convenient for placing the double-iron-core windings are formed in the clamping plates;
the double-iron-core winding comprises an ultra-microcrystalline iron core, a silicon steel sheet iron core and a coil winding, the ultra-microcrystalline iron core and the silicon steel sheet iron core are of annular structures, a positioning hole is formed in the middle of each of the ultra-microcrystalline iron core and the silicon steel sheet iron core and penetrates through the positioning column, the ultra-microcrystalline iron cores are coaxially stacked on the top of the silicon steel sheet iron core, the coil winding is wound on the ultra-microcrystalline iron core and the silicon steel sheet iron core, the four leading-out terminals are arranged on the four corners of the bottom of the insulating shell, and the four leading-out terminals of the coil winding are respectively connected with one leading-out terminal.
2. The dual-core dc component resistant micro current transformer according to claim 1, wherein: the number of winding turns of the coil winding is 1500-2500.
3. The dual-core dc component resistant micro current transformer according to claim 1, wherein: the insulating shell is in an omega-shaped structure.
4. The dual-core dc component resistant micro current transformer according to claim 1, wherein: the width of the positioning clamping groove is larger than the wall thickness of the double-iron-core winding.
5. The dual-core dc component resistant micro current transformer according to claim 1, wherein: the insulating shell, the positioning column and the clamping plate are of an integrally formed structure.
6. The dual-core dc component resistant micro current transformer according to claim 1, wherein: and epoxy resin is filled between the insulating shell and the double-iron-core winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121527509.3U CN215220488U (en) | 2021-07-06 | 2021-07-06 | Double-iron-core DC component-resistant miniature current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121527509.3U CN215220488U (en) | 2021-07-06 | 2021-07-06 | Double-iron-core DC component-resistant miniature current transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215220488U true CN215220488U (en) | 2021-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121527509.3U Active CN215220488U (en) | 2021-07-06 | 2021-07-06 | Double-iron-core DC component-resistant miniature current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215220488U (en) |
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2021
- 2021-07-06 CN CN202121527509.3U patent/CN215220488U/en active Active
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