CN212990881U - From switching power supply transformer of taking EMI to restrain magnetic bead - Google Patents
From switching power supply transformer of taking EMI to restrain magnetic bead Download PDFInfo
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- CN212990881U CN212990881U CN202021384886.1U CN202021384886U CN212990881U CN 212990881 U CN212990881 U CN 212990881U CN 202021384886 U CN202021384886 U CN 202021384886U CN 212990881 U CN212990881 U CN 212990881U
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- power supply
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Abstract
The invention provides a switching power supply transformer with an EMI suppression magnetic bead, which can effectively reduce electromagnetic interference and ensure stable output of a power supply signal, and comprises a magnetic core, a framework, a primary winding and a secondary winding, wherein the primary winding and the secondary winding are wound on the framework; the EMI suppression magnetic bead is sleeved on a lead-out wire of the primary winding of the transformer. The utility model discloses simple structure establishes the magnetic bead inductance through at primary winding lead-out wire outer fringe cover, can effectively restrain the output power signal of transformer, makes its output power signal stable, improves electromagnetic interference, is favorable to improving the stability of transformer.
Description
Technical Field
The invention relates to a transformer, in particular to a switching power supply transformer with EMI (electro-magnetic interference) suppression magnetic beads.
Background
The high-frequency transformer is a power transformer with the working frequency exceeding the intermediate frequency (10kHz), 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 method can be divided into several grades: 10kHz-50kHz, 50kHz-100kHz, 100 kHz-500 kHz, 500 kHz-1 MHz and more than 10 MHz. A transformer is a device for transforming ac voltage, current and impedance, and when an ac current flows through a primary winding, an ac magnetic flux is generated in an iron core (or a magnetic core), so that a voltage (or a current) is induced in a secondary winding.
However, in actual use, electromagnetic interference occurs due to the mutual influence of the primary winding and the secondary winding, and the stable output of the windings is affected.
Disclosure of Invention
The purpose of the invention is as follows: in order to overcome the defects of the prior art, the invention provides the switching power supply transformer with the EMI suppression magnetic beads.
The technical scheme is as follows: the invention provides a switching power supply transformer with an EMI suppression magnetic bead, which can effectively reduce electromagnetic interference and ensure stable output of a power supply signal, and comprises a magnetic core, a framework, a primary winding and a secondary winding, wherein the primary winding and the secondary winding are wound on the framework; the EMI suppression magnetic bead is sleeved on a lead-out wire of the primary winding of the transformer.
And a spacing groove is arranged between the primary winding and the secondary winding.
The distance of the spacing grooves is 0.3-0.5 cm.
And an insulating shell is sleeved outside the magnetic core.
Has the advantages that: compared with the prior art, the switching power supply transformer with the EMI suppression magnetic beads has the following advantages:
1. the utility model discloses simple structure establishes the magnetic bead inductance through at primary winding lead-out wire outer fringe cover, can effectively restrain the output power signal of transformer, makes its output power signal stable, improves electromagnetic interference, is favorable to improving the stability of transformer.
2. The secondary winding of the utility model is a three-layer enameled wire,
drawings
FIG. 1 is a schematic structural view of the present invention;
wherein: 1. the magnetic field-limiting circuit comprises a framework, 2 primary windings, 3 secondary windings, 4 insulating shells, 5 EMI suppression magnetic beads and 6 magnetic cores.
Detailed Description
The technical scheme of the invention is further explained by combining the attached drawings.
Examples
As shown in fig. 1, a switching power transformer with EMI suppression beads 5, which can effectively reduce electromagnetic interference and ensure stable output of power signals, includes a magnetic core 6, a bobbin 1, a primary winding 2 wound on the bobbin 1, and a secondary winding 3, wherein the magnetic core 6 is sleeved outside the primary winding 2 and the secondary winding 3; the EMI suppression magnetic bead 5 is sleeved on a lead-out wire of the primary winding 2 of the transformer; a spacing groove is arranged between the primary winding 2 and the secondary winding 3; the distance of the spacing grooves is 0.3-0.5 cm. And an insulating shell 4 is sleeved outside the magnetic core 6. The utility model discloses simple structure establishes the magnetic bead inductance through 2 lead-out wire outer fringe covers in primary winding, can effectively restrain the output signal of transformer, makes its output signal stable, improves electromagnetic interference, is favorable to improving the stability of transformer.
Claims (4)
1. A switching power supply transformer with EMI suppression magnetic beads is characterized in that: the winding device comprises a magnetic core (6), a framework (1), a primary winding (2) wound on the framework (1) and a secondary winding (3), wherein the magnetic core (6) is sleeved outside the primary winding (2) and the secondary winding (3); the EMI suppression magnetic bead (5) is sleeved on the lead-out wire of the primary winding (2) of the transformer.
2. The switching power transformer with EMI suppression beads as recited in claim 1, further comprising: and a spacing groove is arranged between the primary winding (2) and the secondary winding (3).
3. The switching power transformer with EMI suppression beads as recited in claim 2, wherein: the distance of the spacing grooves is 0.3-0.5 cm.
4. The switching power transformer with EMI suppression beads as recited in claim 1, further comprising: and an insulating shell (4) is sleeved outside the magnetic core (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021384886.1U CN212990881U (en) | 2020-07-15 | 2020-07-15 | From switching power supply transformer of taking EMI to restrain magnetic bead |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021384886.1U CN212990881U (en) | 2020-07-15 | 2020-07-15 | From switching power supply transformer of taking EMI to restrain magnetic bead |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212990881U true CN212990881U (en) | 2021-04-16 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021384886.1U Active CN212990881U (en) | 2020-07-15 | 2020-07-15 | From switching power supply transformer of taking EMI to restrain magnetic bead |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212990881U (en) |
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2020
- 2020-07-15 CN CN202021384886.1U patent/CN212990881U/en active Active
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