CN110571022A - Transformer and switching power supply - Google Patents
Transformer and switching power supply Download PDFInfo
- Publication number
- CN110571022A CN110571022A CN201910774834.0A CN201910774834A CN110571022A CN 110571022 A CN110571022 A CN 110571022A CN 201910774834 A CN201910774834 A CN 201910774834A CN 110571022 A CN110571022 A CN 110571022A
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- Prior art keywords
- magnetic core
- transformer
- upright post
- upright
- core
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- 238000004804 winding Methods 0.000 claims abstract description 50
- 239000003292 glue Substances 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 4
- 230000010354 integration Effects 0.000 abstract description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000004026 adhesive bonding Methods 0.000 description 1
- 239000011889 copper foil Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
Classifications
-
- 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
- H01F27/00—Details of transformers or inductances, in general
- H01F27/24—Magnetic cores
- H01F27/26—Fastening parts of the core together; Fastening or mounting the core on casing or support
- H01F27/266—Fastening or mounting the core on casing or support
-
- 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
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
-
- 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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dc-Dc Converters (AREA)
Abstract
A transformer and a switching power supply are provided. The transformer includes: the opening of the first magnetic core faces upwards and comprises a first upright post and a second upright post; the second magnetic core is positioned beside the first magnetic core, the opening of the second magnetic core faces upwards and comprises a third upright column and a fourth upright column, and the second upright column and the third upright column are positioned between the first upright column and the fourth upright column; the third magnetic core is simultaneously positioned above the first upright post, the second upright post, the third upright post and the fourth upright post; the first secondary winding is wound on the third upright post; the primary winding is wound on the second upright post and the third upright post together and covers the first secondary winding; and the second secondary winding is wound on one of the first stand column and the fourth stand column, the first magnetic core, the second magnetic core and the third magnetic core are combined for use and are wound in a combined mode, the magnetic integration effect is achieved, the utilization rate of the transformer can be improved, and the combined structure of the first magnetic core and the second magnetic core can also reduce the leakage inductance adjustment difficulty.
Description
Technical Field
The present application relates to the field of communication equipment, and in particular, to a transformer and a switching power supply.
Background
The existing transformer is simple in structure and generally comprises a magnetic core, a primary winding, a secondary winding and a framework, the magnetic core is a single magnetic core and comprises a plurality of stand columns, the primary winding and the secondary winding are wound on different stand columns of the magnetic core, the utilization rate of the transformer is low, and the difficulty in leakage inductance adjustment of the single magnetic core is high.
disclosure of Invention
The application provides a transformer, can the lifting utilization rate, reduce the leakage inductance adjustment degree of difficulty.
The application also provides a switching power supply.
The transformer provided by the embodiment of the invention comprises: the opening of the first magnetic core faces upwards and comprises a first upright post and a second upright post; the second magnetic core is positioned beside the first magnetic core, the opening of the second magnetic core faces upwards and comprises a third upright column and a fourth upright column, and the second upright column and the third upright column are positioned between the first upright column and the fourth upright column; a third magnetic core simultaneously positioned above the first, second, third and fourth columns such that the first and third magnetic cores constitute a first closed magnetic core and the second and third magnetic cores constitute a second closed magnetic core; the first secondary winding is wound on the third upright post; the primary winding is wound on the second vertical column and the third vertical column together and covers the first secondary winding; and a second secondary winding wound around one of the first and fourth legs.
optionally, the transformer further comprises: and the third secondary winding is wound on the other one of the first upright post and the fourth upright post.
Optionally, the first magnetic core and the second magnetic core are both U-shaped magnetic cores.
Optionally, the first magnetic core and the second magnetic core are both E-shaped magnetic cores.
Optionally, one of the first magnetic core and the second magnetic core is a U-shaped magnetic core, and the other is an E-shaped magnetic core.
Optionally, a second air gap is formed between the second magnetic core and the third magnetic core.
Optionally, the leakage inductance data of the transformer is determined by adjusting the width of the second air gap.
Optionally, a first air gap is formed between the first magnetic core and the third magnetic core.
Optionally, the first magnetic core and the third magnetic core and the second magnetic core and the third magnetic core are fixed by a connection glue layer.
Optionally, the transformer further comprises: and the first fixing piece, the first magnetic core and the second magnetic core are positioned above the first fixing piece and fixed on the first fixing piece.
Optionally, the transformer further comprises: and the third magnetic core is positioned below the second fixing piece and is fixed on the second fixing piece.
The switching power supply provided by the embodiment of the invention comprises the transformer in any one of the embodiments.
In the transformer provided by the embodiment of the invention, the first magnetic core is positioned beside the second magnetic core, the third magnetic core is positioned above the first magnetic core and the second magnetic core at the same time, the opening of the first magnetic core faces the third magnetic core and comprises the first upright post and the second upright post, the opening of the second magnetic core faces the third magnetic core and comprises the third upright post and the fourth upright post, the first magnetic core and the third magnetic core form a first closed magnetic core, the second magnetic core and the third magnetic core form a second closed magnetic core, the first secondary winding is wound on the third upright post, the primary windings are wound on the second upright post and the third upright post together and coat the first secondary winding, the second secondary winding is wound on one of the first upright post and the fourth upright post, and the first magnetic core, the second magnetic core and the third magnetic core are used together and wound in a combined manner to achieve the effect of magnetic integration, the utilization ratio of the transformer can be improved, and the combined structure of the first magnetic core and the second magnetic core can also reduce the difficulty in leakage inductance adjustment.
Additional features and advantages of the application will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by the practice of the application. The objectives and other advantages of the application may be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
drawings
The accompanying drawings are included to provide a further understanding of the claimed subject matter and are incorporated in and constitute a part of this specification, illustrate embodiments of the subject matter and together with the description serve to explain the principles of the subject matter and not to limit the subject matter.
fig. 1 is a schematic front view of a transformer according to an embodiment of the present invention.
Wherein, the corresponding relation between the reference numbers and the part names in fig. 1 is:
100 a first magnetic core, 110 a first leg, 120 a second leg, 200 a second magnetic core, 210 a third leg, 220 a fourth leg, 300 a third magnetic core, 410 a first closed magnetic core, 420 a second closed magnetic core, 510 a first secondary winding, 520 a second secondary winding, 530 a third secondary winding, 600 a primary winding, 710 a first fixture, 720 a second fixture.
Detailed Description
To make the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in detail below with reference to the accompanying drawings. It should be noted that the embodiments and features of the embodiments in the present application may be arbitrarily combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, however, the present application may be practiced otherwise than as specifically described herein and, therefore, the scope of the present application is not limited by the specific embodiments disclosed below.
The switching power supply provided by the embodiment of the invention, as shown in fig. 1, includes a transformer. The transformer includes: a first magnetic core 100, the opening of the first magnetic core 100 facing upwards and including a first upright column 110 and a second upright column 120; a second magnetic core 200 located beside the first magnetic core 100, wherein the opening of the second magnetic core 200 faces upward and comprises a third upright column 210 and a fourth upright column 220, and the second upright column 120 and the third upright column 210 are located between the first upright column 110 and the fourth upright column 220; a third magnetic core 300, which is simultaneously located above the first upright post 110, the second upright post 120, the third upright post 210 and the fourth upright post 220, and enables the first magnetic core 100 and the third magnetic core 300 to form a first closed magnetic core 410, and the second magnetic core 200 and the third magnetic core 300 to form a second closed magnetic core 420; a first secondary winding 510 wound around the third column 210; a primary winding 600 wound around the second pillar 120 and the third pillar 210 together and covering the first secondary winding 510; and a second secondary winding 520 wound on one of the first and fourth legs 110 and 220.
In the switching power supply, a first magnetic core 100 is positioned at one side of a second magnetic core 200, a third magnetic core 300 is positioned above the first magnetic core 100 and the second magnetic core 200 at the same time, the opening of the first magnetic core 100 faces the third magnetic core 300 and comprises a first upright post 110 and a second upright post 120, the opening of the second magnetic core 200 faces the third magnetic core 300 and comprises a third upright post 210 and a fourth upright post 220, the first magnetic core 100 and the third magnetic core 300 form a first closed magnetic core 410, the second magnetic core 200 and the third magnetic core 300 form a second closed magnetic core 420, a first secondary winding 510 is wound on the third upright post 210, a primary winding 600 is wound on the second upright post 120 and the third upright post 210 together and covers the first secondary winding 510, a second secondary winding 520 is wound on one of the first upright post 110 and the fourth upright post 220, the first magnetic core 100, the second magnetic core 200 and the third magnetic core 300 are combined and wound in combination, the magnetic integration effect is achieved, the utilization rate of the transformer can be improved, the power density of the switching power supply is increased, the combined structure of the first magnetic core 100 and the second magnetic core 200 can reduce the difficulty of leakage inductance adjustment, leakage inductance can be better controlled, and the performance of the switching power supply and the performance of the transformer are improved.
Specifically, the switching power supply further includes a diode, as shown in fig. 1, with a second air gap formed between the second core 200 and the third core 300.
The size of the leakage inductance of the transformer can be determined by adjusting the width dimension of the second air gap, so that the problems of voltage spike and reverse recovery of the diode caused by the first secondary winding, the second secondary winding and the third secondary winding are solved better.
specifically, as shown in fig. 1, a first air gap is formed between first magnetic core 100 and third magnetic core 300.
Specifically, as shown in fig. 1, the transformer further includes: and a third secondary winding 530 wound around the other of the first leg 110 and the fourth leg 220.
Alternatively, as shown in fig. 1, the second secondary winding 520 is wound around the first leg 110, and the third secondary winding 530 is wound around the fourth leg 220.
Alternatively, the third secondary winding may be wound around the first leg and the second secondary winding may be wound around the fourth leg.
The above objectives can be achieved without departing from the design concept of the present invention, and therefore, the details are not repeated herein and all of the objectives should fall within the protection scope of the present application.
As shown in fig. 1, the first core 100 and the second core 200 may be U-shaped cores, and the third core 300 may be a flat core.
Alternatively, the first core 100 and the second core 200 may be both E-shaped cores, and the third core 300 may be a flat core.
Alternatively, one of first core 100 and second core 200 may be a U-shaped core, the other may be an E-shaped core, and third core 300 may be a flat core or the like.
The above objectives can be achieved without departing from the design concept of the present invention, and therefore, the details are not repeated herein and all of the objectives should fall within the protection scope of the present application.
After the leakage inductance is adjusted, the first magnetic core 100, the third magnetic core 300, the second magnetic core 200 and the third magnetic core 300 are fixed by gluing to form a connecting glue layer.
Specifically, as shown in fig. 1, the transformer further includes: the first fixing part 710, the first magnetic core 100 and the second magnetic core 200 are positioned above the first fixing part 710 and fixed on the first fixing part 710; and a second fixing member 720, the third magnetic core 300 being positioned below the second fixing member 720 and fixed to the second fixing member 720.
Specifically, the primary winding, the first secondary winding, the second secondary winding, and the third secondary winding may be wound by using a round copper wire or a flat copper foil, and the like, and the purpose of the present application can be achieved.
in summary, in the transformer provided in the embodiments of the present invention, the first magnetic core is located beside the second magnetic core, the third magnetic core is located above the first magnetic core and the second magnetic core at the same time, the opening of the first magnetic core faces the third magnetic core and includes the first column and the second column, the opening of the second magnetic core faces the third magnetic core and includes the third column and the fourth column, the first magnetic core and the third magnetic core form the first closed magnetic core, the second magnetic core and the third magnetic core form the second closed magnetic core, the first secondary winding is wound on the third column, the primary windings are wound on the second column and the third column together and cover the first secondary winding, the second secondary winding is wound on one of the first column and the fourth column, the first magnetic core, the second magnetic core and the third magnetic core are used in combination and wound in combination, so as to achieve the effect of magnetic integration, and improve the utilization rate of the transformer, the combined structure of the first magnetic core and the second magnetic core can also reduce the difficulty of leakage inductance adjustment.
In the description of the present application, the terms "mounted," "connected," "fixed," and the like are used in a broad sense, and for example, "connected" may be a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
Although the embodiments disclosed in the present application are described above, the descriptions are only for the convenience of understanding the present application, and are not intended to limit the present application. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the disclosure as defined by the appended claims.
Claims (10)
1. A transformer, comprising:
The opening of the first magnetic core faces upwards and comprises a first upright post and a second upright post;
The second magnetic core is positioned beside the first magnetic core, the opening of the second magnetic core faces upwards and comprises a third upright column and a fourth upright column, and the second upright column and the third upright column are positioned between the first upright column and the fourth upright column;
A third magnetic core simultaneously positioned above the first, second, third and fourth columns such that the first and third magnetic cores constitute a first closed magnetic core and the second and third magnetic cores constitute a second closed magnetic core;
The first secondary winding is wound on the third upright post;
The primary winding is wound on the second vertical column and the third vertical column together and covers the first secondary winding; and
And the second secondary winding is wound on one of the first upright post and the fourth upright post.
2. The transformer of claim 1, further comprising:
And the third secondary winding is wound on the other one of the first upright post and the fourth upright post.
3. Transformer according to claim 1 or 2,
the first magnetic core and the second magnetic core are both U-shaped magnetic cores; or
the first magnetic core and the second magnetic core are both E-shaped magnetic cores; or
one of the first magnetic core and the second magnetic core is a U-shaped magnetic core, and the other is an E-shaped magnetic core.
4. The transformer of claim 1 or 2, wherein a second air gap is formed between the second core and the third core.
5. The transformer of claim 4, wherein leakage inductance data of the transformer is determined by adjusting a width of the second air gap.
6. The transformer of claim 1 or 2, wherein a first air gap is formed between the first core and the third core.
7. The transformer of claim 1 or 2, wherein the first and third magnetic cores and the second and third magnetic cores are fixed by a connection glue layer.
8. The transformer of claim 1 or 2, further comprising:
And the first fixing piece, the first magnetic core and the second magnetic core are positioned above the first fixing piece and fixed on the first fixing piece.
9. The transformer of claim 1 or 2, further comprising:
And the third magnetic core is positioned below the second fixing piece and is fixed on the second fixing piece.
10. a switching power supply, characterized by comprising a transformer according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910774834.0A CN110571022A (en) | 2019-08-21 | 2019-08-21 | Transformer and switching power supply |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910774834.0A CN110571022A (en) | 2019-08-21 | 2019-08-21 | Transformer and switching power supply |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110571022A true CN110571022A (en) | 2019-12-13 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910774834.0A Pending CN110571022A (en) | 2019-08-21 | 2019-08-21 | Transformer and switching power supply |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110571022A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113421751A (en) * | 2021-06-18 | 2021-09-21 | 台达电子企业管理（上海）有限公司 | Magnetic assembly and power module |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2626023Y (en) * | 2003-05-12 | 2004-07-14 | 钟玉麟 | Transformer for cold cathode tube current converter |
| CN201966043U (en) * | 2010-11-18 | 2011-09-07 | 林扬电子股份有限公司 | Multifunctional transformer |
| CN103077803A (en) * | 2011-10-25 | 2013-05-01 | 杨玉岗 | Interleaved magnetic integration type coupling inductor |
| CN202996537U (en) * | 2012-09-04 | 2013-06-12 | 振华电脑有限公司 | Side-wound type winding transformer |
-
2019
- 2019-08-21 CN CN201910774834.0A patent/CN110571022A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2626023Y (en) * | 2003-05-12 | 2004-07-14 | 钟玉麟 | Transformer for cold cathode tube current converter |
| CN201966043U (en) * | 2010-11-18 | 2011-09-07 | 林扬电子股份有限公司 | Multifunctional transformer |
| CN103077803A (en) * | 2011-10-25 | 2013-05-01 | 杨玉岗 | Interleaved magnetic integration type coupling inductor |
| CN202996537U (en) * | 2012-09-04 | 2013-06-12 | 振华电脑有限公司 | Side-wound type winding transformer |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113421751A (en) * | 2021-06-18 | 2021-09-21 | 台达电子企业管理（上海）有限公司 | Magnetic assembly and power module |
| CN113421751B (en) * | 2021-06-18 | 2023-03-07 | 台达电子企业管理（上海）有限公司 | Magnetic assembly and power module |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20191213 |
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| RJ01 | Rejection of invention patent application after publication |