CN217719269U - High-frequency transformer with low magnetic leakage and anti-interference - Google Patents
High-frequency transformer with low magnetic leakage and anti-interference Download PDFInfo
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- CN217719269U CN217719269U CN202221542780.9U CN202221542780U CN217719269U CN 217719269 U CN217719269 U CN 217719269U CN 202221542780 U CN202221542780 U CN 202221542780U CN 217719269 U CN217719269 U CN 217719269U
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Abstract
The utility model discloses a have low magnetic leakage and anti-interference high frequency transformer concurrently, including skeleton, foil coil assembly and two E type magnetic cores, foil coil assembly includes inlayer secondary foil coil, middle primary foil coil and the outer secondary foil coil of arranging from inside to outside, inlayer secondary foil coil and outer secondary foil coil electric connection, be equipped with first insulating liner between inlayer secondary foil coil and the middle primary foil coil, be equipped with the second insulating liner between middle primary foil coil and the outer secondary foil coil; the inner secondary foil coil, the middle primary foil coil and the outer secondary foil coil at least comprise two turns, and copper open-circuit rings are arranged among the three turns. The utility model discloses can promote the coupling between primary and the secondary coil effectively, promote the heat dissipation, reduce the magnetic leakage, the size is controllable to be less, and anti-interference effect is good.
Description
Technical Field
The utility model relates to a high frequency transformer technical field, concretely relates to have low magnetic leakage and anti-interference high frequency transformer concurrently.
Background
The high-frequency transformer is a power transformer with the working frequency exceeding the intermediate frequency (10 kHz), is mainly used as a high-frequency switching power transformer in a high-frequency switching power supply, and is also used as a high-frequency inverter power transformer in a high-frequency inverter power supply and a high-frequency inverter welding machine. According to the working frequency, the frequency can be divided into several grades, namely 10kHz-50kHz, 50kHz-100kHz, 100 kHz-500 kHz, 500 kHz-1 MHz and more than 10 MHz. A transformer is a device that transforms ac voltage, current and impedance, and when ac current is passed through a primary winding, an ac magnetic flux is generated in a magnetic core, inducing a voltage in a secondary winding.
At present, in order to reduce magnetic flux leakage, enameled wires can be tightly wound, but poor heat dissipation is easily caused; the magnetic flux leakage can be reduced by increasing the height of the magnetic core and reducing the number of turns of the coil, and the required magnetic core has a large height, which is contrary to the miniaturization trend of the high-frequency transformer. In addition, the conventional primary coil and the conventional secondary coil are easy to generate mismatching, generate more distributed capacitance and have poor anti-interference effect.
SUMMERY OF THE UTILITY MODEL
The utility model provides a have low magnetic leakage and anti-interference high frequency transformer concurrently, can solve above-mentioned technical problem.
The utility model discloses a following technical scheme realizes:
a high-frequency transformer with low magnetic leakage and interference resistance comprises a framework, a foil coil assembly and two E-shaped magnetic cores, wherein the two E-shaped magnetic cores are oppositely inserted and installed in the framework; the foil type coil assembly is wound on the framework and comprises an inner secondary foil type coil, a middle primary foil type coil and an outer secondary foil type coil which are arranged from inside to outside, the inner secondary foil type coil is electrically connected with the outer secondary foil type coil, a first insulating liner is arranged between the inner secondary foil type coil and the middle primary foil type coil, and a second insulating liner is arranged between the middle primary foil type coil and the outer secondary foil type coil; the inner secondary foil coil, the middle primary foil coil and the outer secondary foil coil at least comprise two turns, and copper open-circuit rings are arranged among the three turns.
The working principle of the technical scheme is as follows:
the utility model discloses a have low magnetic leakage and anti-interference high frequency transformer concurrently includes skeleton, foil type coil assembly and two E type magnetic cores, through setting up foil type coil assembly to include inlayer secondary foil type coil, middle primary foil type coil and outer secondary foil type coil, can promote the coupling between primary and the secondary coil effectively, promote the heat dissipation, reduce the magnetic leakage, still can be with product size control less under the prerequisite that satisfies more powerful, accord with high frequency transformer's miniaturized demand; in addition, the copper open-circuit rings are arranged among different turns of the inner-layer secondary foil coil, the middle primary foil coil and the outer-layer secondary foil coil, so that the accident closure between the primary coil and the secondary coil is effectively reduced, the open-circuit rings can be connected with the E-shaped magnetic core and the ground of the high-frequency transformer, a good electrostatic shielding effect can be achieved, and the anti-interference effect is improved.
Further, the cross-sectional area of the copper open loop is not less than 4cm2。
The magnetic resistance according to an open-loop strap is inversely related to the cross-sectional area, so the larger the cross-sectional area, the better the effectiveness of the electrostatic shield.
Furthermore, at least two copper open-circuit rings are arranged among different layers of the inner-layer secondary foil coil, the middle primary foil coil and the outer-layer secondary foil coil, the positions of the copper open-circuit rings are uniformly distributed in the same layer, and at least two copper open-circuit rings are positioned at two ends of the corresponding coil.
So set up, more copper open circuit ring further promotes electrostatic shielding's effect.
Further, the skeleton is equipped with the vertical mounting hole that runs through, just the bottom of skeleton is equipped with the stitch, two the E type magnetic core is inserted relatively and is located in the mounting hole, the winding of foil coil assembly in the outer wall of mounting hole.
According to the arrangement, the high-frequency transformer is simple in structure and high in practicability.
Further, two E type magnetic cores are first E type magnetic core and second E type magnetic core respectively, the head end of the magnetic core post of first E type magnetic core is provided with the arch, the head end of the magnetic core post of second E type magnetic core be provided with the recess of protruding looks adaptation, work as when protruding and recess adaptation are connected, first E type magnetic core and second E type magnetic core are complete symmetry.
So set up, be convenient for when high frequency transformer's installation, be convenient for aim at two E type magnetic cores, also have certain fixed action.
Compared with the prior art, the utility model, following advantage and beneficial effect have:
the utility model discloses a have low magnetic leakage and anti-interference high frequency transformer concurrently includes skeleton, foil type coil assembly and two E type magnetic cores, through setting up foil type coil assembly to include inlayer secondary foil type coil, middle primary foil type coil and outer secondary foil type coil, can promote the coupling between primary and the secondary coil effectively, reduce the magnetic leakage, still can be with the product size control to be less under the prerequisite that satisfies more powerful, accord with high frequency transformer's miniaturization demand; in addition, the copper open-circuit rings are arranged among different turns of the inner-layer secondary foil coil, the middle primary foil coil and the outer-layer secondary foil coil, so that the accident closure between the primary coil and the secondary coil is effectively reduced, the open-circuit rings can be connected with the E-shaped magnetic core and the ground of the high-frequency transformer, a good electrostatic shielding effect can be achieved, and the anti-interference effect is improved.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
fig. 1 is a schematic structural diagram of a high-frequency transformer with low magnetic leakage and interference resistance according to an embodiment of the present invention;
fig. 2 is a half-sectional view of the foil coil assembly of fig. 1.
Reference numbers and corresponding part names in the drawings:
10-a framework; 11-stitch; 12-mounting holes; a 20-E type magnetic core; 21-a magnetic core column; 30-foil coil assembly; 31-inner secondary foil coil; 32-intermediate primary foil coils; 33-outer secondary foil coil; 34-copper open loop; 35-a first insulating pad; 36-second insulating liner.
Detailed Description
To make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the following examples and drawings, and the exemplary embodiments and descriptions thereof of the present invention are only used for explaining the present invention, and are not intended as limitations of the present invention.
Examples
As shown in fig. 1 and 2, a high-frequency transformer with low magnetic leakage and interference resistance includes a bobbin 10, a foil coil assembly 30, and two E-shaped magnetic cores 20. The two E-shaped magnetic cores 20 are oppositely inserted and installed in the framework 10. Foil coil assembly 30 twines in on the skeleton 10, foil coil assembly 30 includes secondary foil coil 31 of inlayer, middle elementary foil coil 32 and outer secondary foil coil 33 that arrange from inside to outside, secondary foil coil 31 of inlayer and outer secondary foil coil 33 electric connection, be equipped with first insulating liner 35 between secondary foil coil 31 of inlayer and the middle elementary foil coil 32, be equipped with second insulating liner 36 between middle elementary foil coil 32 and the outer secondary foil coil 33. For example, the inner secondary foil coil 31 and the outer secondary foil coil 33 may be connected by a wire. For example, each of the first insulating pad 35 and the second insulating pad 36 may be provided with multiple layers to increase the thickness and satisfy the requirement of dielectric strength. The inner layer secondary foil type coil 31, the middle primary foil type coil 32 and the outer layer secondary foil type coil 33 at least comprise two turns, and copper open-circuit rings 34 are arranged among different turns of the three. For example, the open ring 34 made of copper may be a copper foil material.
The working principle of the technical scheme is as follows:
the utility model discloses a have low magnetic leakage and anti-jamming high frequency transformer concurrently includes skeleton 10, foil type coil assembly 30 and two E type magnetic cores 20, through setting up foil type coil assembly 30 to include inlayer secondary foil type coil 31, middle elementary foil type coil 32 and outer secondary foil type coil 33, can promote the coupling between elementary coil and the secondary coil effectively, promote the heat dissipation, reduce the magnetic leakage, still can make the product size control less under the prerequisite that satisfies more powerful, accord with high frequency transformer's miniaturized demand; in addition, the copper open-circuit rings 34 are arranged among different turns of the inner-layer secondary foil coil 31, the middle primary foil coil 32 and the outer-layer secondary foil coil 33, so that the accident of the primary coil and the secondary coil is effectively reduced, the open-circuit rings can be connected with the E-shaped magnetic core 20 and the ground of the high-frequency transformer, a good electrostatic shielding effect can be achieved, and the anti-interference effect is improved.
In further embodiments, the cross-sectional area of the copper open ring 34 is not less than 4cm2. The magnetic reluctance according to an open loop strap is inversely related to the cross-sectional area, so the larger the cross-sectional area, the better the effectiveness of the electrostatic shield.
In another embodiment, at least two open-circuit copper rings 34 are disposed between different layers of the inner secondary foil coil 31, the middle primary foil coil 32, and the outer secondary foil coil 33, and the open-circuit copper rings 34 are uniformly distributed in the same layer, and at least two open-circuit copper rings 34 are disposed at two ends of the corresponding coil. With such an arrangement, more copper open-circuit rings 34 are provided, thereby further improving the electrostatic shielding effect.
In another embodiment, the framework 10 is provided with a vertically penetrating mounting hole 12, the bottom of the framework 10 is provided with a pin 11, the two E-shaped magnetic cores 20 are oppositely inserted into the mounting hole 12, and the foil coil assembly 30 is wound on the outer wall of the mounting hole 12. According to the arrangement, the high-frequency transformer is simple in structure and high in practicability.
In another embodiment, the two E-shaped magnetic cores 20 are a first E-shaped magnetic core 20 and a second E-shaped magnetic core 20, the head end of the core column 21 of the first E-shaped magnetic core 20 is provided with a protrusion, the head end of the core column 21 of the second E-shaped magnetic core 20 is provided with a groove adapted to the protrusion, and when the protrusion is adapted to the groove, the first E-shaped magnetic core 20 and the second E-shaped magnetic core 20 are completely symmetrical. So set up, be convenient for when the installation of high frequency transformer, be convenient for aim at two E type magnetic cores 20, also have certain fixed action.
The above-mentioned embodiments, further detailed description of the objects, technical solutions and advantages of the present invention, it should be understood that the above description is only the embodiments of the present invention, and is not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (5)
1. A high-frequency transformer with low magnetic leakage and interference resistance is characterized by comprising a framework, a foil coil assembly and two E-shaped magnetic cores, wherein the two E-shaped magnetic cores are oppositely inserted and installed in the framework; the foil type coil assembly is wound on the framework and comprises an inner secondary foil type coil, a middle primary foil type coil and an outer secondary foil type coil which are arranged from inside to outside, the inner secondary foil type coil is electrically connected with the outer secondary foil type coil, a first insulating liner is arranged between the inner secondary foil type coil and the middle primary foil type coil, and a second insulating liner is arranged between the middle primary foil type coil and the outer secondary foil type coil; the inner secondary foil coil, the middle primary foil coil and the outer secondary foil coil respectively comprise at least two turns, and copper open-circuit rings are arranged among different turns of the inner secondary foil coil, the middle primary foil coil and the outer secondary foil coil.
2. The high-frequency transformer with low magnetic leakage and interference resistance as claimed in claim 1, wherein the cross-sectional area of the copper open loop is not less than 4cm2。
3. The high-frequency transformer with low magnetic leakage and interference resistance according to claim 2, wherein at least two open-circuit copper rings are disposed between different layers of the inner secondary foil coil, the middle primary foil coil and the outer secondary foil coil, and in the same layer, the open-circuit copper rings are uniformly distributed and at least two open-circuit copper rings are disposed at two ends of the corresponding coil.
4. The high-frequency transformer with low magnetic leakage and interference resistance according to claim 1, wherein the framework is provided with a vertically penetrating mounting hole, a pin is arranged at the bottom of the framework, the two E-shaped magnetic cores are oppositely inserted into the mounting hole, and the foil coil assembly is wound on the outer wall of the mounting hole.
5. The high-frequency transformer with low magnetic leakage and interference resistance according to claim 1, wherein the two E-shaped magnetic cores are respectively a first E-shaped magnetic core and a second E-shaped magnetic core, the head end of the core column of the first E-shaped magnetic core is provided with a protrusion, the head end of the core column of the second E-shaped magnetic core is provided with a groove matched with the protrusion, and when the protrusion is matched with the groove, the first E-shaped magnetic core and the second E-shaped magnetic core are completely symmetrical.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221542780.9U CN217719269U (en) | 2022-06-20 | 2022-06-20 | High-frequency transformer with low magnetic leakage and anti-interference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221542780.9U CN217719269U (en) | 2022-06-20 | 2022-06-20 | High-frequency transformer with low magnetic leakage and anti-interference |
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| Publication Number | Publication Date |
|---|---|
| CN217719269U true CN217719269U (en) | 2022-11-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221542780.9U Active CN217719269U (en) | 2022-06-20 | 2022-06-20 | High-frequency transformer with low magnetic leakage and anti-interference |
Country Status (1)
| Country | Link |
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| CN (1) | CN217719269U (en) |
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2022
- 2022-06-20 CN CN202221542780.9U patent/CN217719269U/en active Active
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