CN211350268U - Current transformer with novel structure - Google Patents
Current transformer with novel structure Download PDFInfo
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- CN211350268U CN211350268U CN201922348062.2U CN201922348062U CN211350268U CN 211350268 U CN211350268 U CN 211350268U CN 201922348062 U CN201922348062 U CN 201922348062U CN 211350268 U CN211350268 U CN 211350268U
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- shell
- side winding
- secondary side
- hollow cylinder
- hole
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Abstract
The utility model relates to a novel current transformer of structure, which comprises an outer shell, the magnetic ring, side winding once, the secondary side winding, the potting material, the fixed glue, the shell is central point puts a hollow cylinder's ring form for interior, be square casing outward, there is a through-hole in the lateral wall of shell up end, hollow cylinder passes through the long circular groove on the shell top face with the through-hole and links to each other, the shell bottom has three outstanding pin, the secondary side winding is at the even coiling of magnetic ring, and horizontal dress is internal in the annular in the shell, the play of secondary side winding, the tail connects respectively on two pins on the shell, side winding once inserts in hollow cylinder and through-hole from the shell top, the fixed glue will be in the same place with side winding and recess are fixed. The effect is small, easy operation, simple to operate satisfy the ann rule requirement, utilizes the novel structure of shell to keep apart primary side winding and secondary side winding to carry out the embedment to the secondary side winding, guaranteed that two windings are withstand voltage and creepage distance between.
Description
Technical Field
The utility model relates to a current transformer, in particular to current transformer of novel structure.
Background
The current transformer is composed of a closed iron core and a winding according to the principle of electromagnetic induction, the number of turns of a primary side winding of the current transformer is small, and the primary side winding is connected in series in a circuit of current to be measured, so that all current of the circuit always flows through the current transformer, and the number of turns of a secondary side winding of the current transformer is large, and the current transformer is connected in series in a measuring instrument and a protection loop. In a high-frequency switching power supply, it is necessary to detect the current of components such as a switching tube and an inductor. The current transformer has the advantages of low energy consumption, wide frequency band, good signal reducibility, low price, isolation of control and main power circuits and the like, so the current transformer is well applied to a switching power supply and is often used as a current detection method. The switching power supply needs to meet the requirements of safety regulations, so that the primary side and the secondary side of a current transformer in the switching power supply need to meet certain creepage distance and higher voltage withstanding requirements, and the conventional structure is difficult to meet the requirements of larger creepage distance and higher voltage withstanding.
Disclosure of Invention
In view of the problems existing in the prior art, the utility model provides a current transformer of novel structure, concrete technical scheme is, a current transformer of novel structure, including shell, magnetic ring, side winding, secondary side winding, potting compound, fixed glue, its characterized in that: the magnetic ring type magnetic field generator is characterized in that the shell is an annular body with a hollow cylinder at the center and a square shell outside, a through hole is formed in one side wall of the upper end face of the shell, the hollow cylinder is connected with the through hole through a long circular groove in the top end face of the shell, the diameters of the hollow cylinder, the through hole and the groove are slightly larger than the outer diameter of the primary side winding, three protruding pins are arranged at the bottom end of the shell, the secondary side winding is uniformly wound on the magnetic ring and horizontally arranged in the annular body in the shell, the start and the tail of the secondary side winding are respectively connected to the two pins on the shell, the primary side winding is inserted into the hollow cylinder and the through hole from the top end of the.
The beneficial effects of the utility model are that, utilize the novel structure of shell to keep apart primary side winding and secondary side winding to carry out the embedment to the secondary side winding, the embedment material has increased the insulation of primary side winding and secondary side winding, has guaranteed creepage distance between primary side winding and the secondary side winding, has strengthened primary side winding and secondary side winding withstand voltage, this structure simple to operate moreover, and is small, easily satisfies ann rule requirement.
Drawings
FIG. 1 is a sectional view of the structure of the present invention;
FIG. 2 is a perspective view of the present invention;
fig. 3 is a bottom perspective view of the housing of the present invention;
fig. 4 is a top perspective view of the housing of the present invention.
Detailed Description
The present invention will be further explained with reference to the drawings and the embodiments.
Example one
Take current transformers D12.7-49 as an example.
As shown in fig. 1 to 4, a current transformer with a novel structure comprises a housing 1, a magnetic ring 2, a primary side winding 3, a secondary side winding 4, a potting material 5 and a fixing glue 6, wherein the housing 1 is an annular body with a hollow cylinder 1-1 at the center position inside and a square housing outside, a through hole 1-2 is formed in one side wall of the upper end surface of the housing 1, the hollow cylinder 1-1 is connected with the through hole 1-2 through a long circular groove 1-3 on the top end surface of the housing 1, the diameters of the hollow cylinder 1-1, the through hole 1-2 and the groove 1-3 are slightly larger than the outer diameter of the primary side winding 3, and three protruded pins 1-4 are arranged at the bottom end of the housing 1.
The primary winding 3 is a phi 1.2mm tinned copper wire, the secondary winding 4 is a phi 0.2 polyurethane enameled wire, firstly, the phi 0.2 polyurethane enameled wire is uniformly wound on a magnetic ring 2 for 100 circles to serve as the secondary winding 4, then the start and the tail of the secondary winding are subjected to tin ironing treatment, after treatment, the tin ironing and circle number testing are carried out, the secondary winding is tested to be qualified, the secondary winding is horizontally arranged in an annular body in a shell 1, the start and the tail of the secondary winding 4 are connected to two different pins 1-4 of the shell 1, the annular body of the shell 1 is encapsulated and solidified by an encapsulating material 5, after encapsulation and solidification, the phi 1.2mm tinned copper wire of the primary winding 3 is inserted into a hollow cylinder 1-1 and a through hole 1-2 reserved on the shell 1 and extends out of the hole, is fixed in a groove 1-3 by a fixing glue 6 and is dried, and the processes of pin correction, tin ironing for two times, labeling, rechecking, finally, the product is subjected to delivery inspection, performance and appearance inspection, and the product is qualified if the requirements are met.
Claims (1)
1. The utility model provides a current transformer of novel structure, includes shell (1), magnetic ring (2), primary side winding (3), secondary side winding (4), potting material (5), solid fixed glue (6), its characterized in that: the magnetic ring is characterized in that the shell (1) is an annular body with a hollow cylinder (1-1) in the center and a square shell outside, a through hole (1-2) is formed in one side wall of the upper end face of the shell (1), the hollow cylinder (1-1) is connected with the through hole (1-2) through a long circular groove (1-3) on the top end face of the shell (1), the diameters of the hollow cylinder (1-1), the through hole (1-2) and the groove (1-3) are slightly larger than the outer diameter of the primary side winding (3), three protruding pins (1-4) are arranged at the bottom end of the shell (1), the secondary side winding (4) is uniformly wound on the magnetic ring (2) and horizontally arranged in the annular body in the shell (1),
the start and tail ends of the secondary side winding (4) are respectively connected to two pins (1-4) on the shell (1), the primary side winding (3) is inserted into the hollow cylinder (1-1) and the through hole (1-2) from the top end of the shell (1), and the primary side winding (3) and the groove (1-3) are fixed together by fixing glue (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922348062.2U CN211350268U (en) | 2019-12-24 | 2019-12-24 | Current transformer with novel structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922348062.2U CN211350268U (en) | 2019-12-24 | 2019-12-24 | Current transformer with novel structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211350268U true CN211350268U (en) | 2020-08-25 |
Family
ID=72103551
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922348062.2U Active CN211350268U (en) | 2019-12-24 | 2019-12-24 | Current transformer with novel structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211350268U (en) |
-
2019
- 2019-12-24 CN CN201922348062.2U patent/CN211350268U/en active Active
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