CN112614666A - Magnetic core structure and manufacturing method of large-size spliced transformer - Google Patents
Magnetic core structure and manufacturing method of large-size spliced transformer Download PDFInfo
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- CN112614666A CN112614666A CN202011417427.3A CN202011417427A CN112614666A CN 112614666 A CN112614666 A CN 112614666A CN 202011417427 A CN202011417427 A CN 202011417427A CN 112614666 A CN112614666 A CN 112614666A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 25
- 238000004804 winding Methods 0.000 claims description 22
- 239000000696 magnetic material Substances 0.000 claims description 9
- 238000005245 sintering Methods 0.000 claims description 9
- 229910000859 α-Fe Inorganic materials 0.000 claims description 9
- 210000001161 mammalian embryo Anatomy 0.000 claims description 3
- 239000000843 powder Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 230000005540 biological transmission Effects 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 5
- 230000006872 improvement Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 208000008103 Amniotic Band Syndrome Diseases 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
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- 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
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- 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
- H01F27/263—Fastening parts of the core together
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
- H01F41/0206—Manufacturing of magnetic cores by mechanical means
- H01F41/0246—Manufacturing of magnetic circuits by moulding or by pressing powder
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
The invention discloses a magnetic core structure and a manufacturing method of a large-size spliced transformer. The large-size annular magnetic core is disassembled into a plurality of small-size magnetic core unit structures, and the manufacturing of the large-size annular magnetic core is converted into the manufacturing of the standardized small-size magnetic core unit structures, so that the yield of the magnetic core production is greatly improved, and the production cost is reduced; the magnetic core unit structures with the small sizes are spliced into the annular magnetic core with the large size, and the annular magnetic core is applied to the transformer with the large size, so that the purposes of restricting a magnetic circuit and reducing the intensity of a leakage magnetic field can be achieved, and meanwhile, the annular magnetic core has the advantage of high transmission efficiency of the transformer with the large size.
Description
Technical Field
The invention relates to the technical field of transformer structures, in particular to a magnetic core structure and a manufacturing method of a large-size spliced transformer.
Background
Transformers are key components of special power supplies. In order to improve the conversion efficiency and reduce the intensity of the leakage magnetic field, the soft magnetic material is usually made into a magnetic core with a special shape such as a ring shape, an E shape, etc. to achieve the purpose of restricting the magnetic circuit. With the improvement of power and the requirement of special occasions, the size of the soft magnetic material of the transformer is gradually increased, and the existing standard soft magnetic structure can not meet the application requirement. Meanwhile, because the soft magnetic material is a fragile material, the yield of large-size soft magnetic material is low, and the production cost is greatly improved.
Therefore, it is very important to provide a magnetic core which is suitable for a large-size transformer, easy to manufacture, and capable of improving the yield of products, and has low magnetic leakage and high transmission efficiency.
Disclosure of Invention
In view of the above, the invention provides a magnetic core structure and a large-size splicing type transformer manufacturing method, wherein a large-size annular soft magnetic material is formed by splicing a plurality of small-size fan-shaped magnetic core unit structures, so that the standardization, small-size design and manufacturing of a magnetic core are realized, the yield of products is improved, and the manufacturing cost is reduced; meanwhile, the magnetic flux leakage is low, and the transmission efficiency is high.
The technical scheme adopted by the invention is as follows:
the utility model provides a magnetic core unit structure, magnetic core unit structure is fan-shaped and is made by soft magnetic material, set up both ends open-ended fan-shaped groove on the magnetic core unit structure.
Preferably, the central angle corresponding to the fan-shaped structure of the magnetic core unit structure is 43-45 degrees, and the thickness of the magnetic core unit structure is 20-30 mm.
The trend of the fan-shaped groove is consistent with the fan-shaped trend of the magnetic core unit structure.
The invention also provides a spliced annular magnetic core which comprises a plurality of the magnetic core unit structures, wherein the magnetic core unit structures are sequentially connected along the circumferential direction to form the annular magnetic core; the fan-shaped grooves of the magnetic core unit structure are sequentially communicated along the circumferential direction of the ring-groove-type magnetic core to form a ring-groove-type magnetic core.
The large-size ring-groove-shaped magnetic core is disassembled into a plurality of magnetic core unit structures and spliced to form the magnetic core unit structure, and the single magnetic core unit structure is small in size and easy to manufacture, so that the yield of products is effectively improved, and the production cost is reduced; the large-size annular-groove-type magnetic core formed by connecting the plurality of magnetic core unit structures has the performance characteristics of large-size and annular soft magnetic materials, and is low in leakage magnetic field strength and high in transmission efficiency; the annular groove is used for placing the winding, and is favorable for placing and fixing the winding.
Preferably, a plurality of the core unit structures constituting the ring-groove type core are fixed by a skeleton structure.
The invention also provides a transformer, which comprises a magnetic core, a primary winding and a secondary winding, wherein the magnetic core is the annular groove type magnetic core, and each primary winding or each secondary winding is respectively and correspondingly arranged in an annular groove of the annular groove type magnetic core and respectively forms a primary winding or a secondary winding of the transformer; the primary annular magnetic core of the transformer and the secondary annular magnetic core of the transformer are correspondingly connected with each other to form the transformer. The transformer can adopt the large size design, satisfies the requirement of low magnetic leakage, high transmission efficiency to the manufacturing process yield of the magnetic core that uses is high, easily makes, and is with low costs.
Preferably, the open end of the annular groove of the ring-groove-shaped magnetic core of the primary side of the transformer is correspondingly connected with the open end of the annular groove of the ring-groove-shaped magnetic core of the secondary side of the transformer, and is fixed through a framework structure. An annular space is formed between the two correspondingly connected annular groove type magnetic cores, the primary winding and the secondary winding are both positioned in the annular space, and magnetic coupling is carried out through the correspondingly connected annular groove type magnetic cores.
The invention also provides a manufacturing method of the magnetic core unit structure, which comprises the following steps:
s1, ferrite embryo forming: pressing ferrite powder into a cubic rough blank through a mechanical tool, wherein each size of the cubic rough blank is larger than the structural size of the magnetic core unit;
s2, sintering: sintering the cubic rough blank at a high temperature through a sintering furnace to form a cubic ferrite core structure;
s3, rough engraving: carving is carried out according to the shape of the magnetic core unit structure by using a carving machine, and the carved overall dimension is expanded by 1-2 mm on the basis of the size of the magnetic core unit structure.
S4, engraving: and engraving according to the fan-shaped magnetic core structure by using an engraving machine, wherein the accuracy of the engraved outline dimension is controlled within a required range.
Compared with the prior art, the magnetic core structure and the manufacturing method of the large-size splicing type transformer provided by the invention,
1. the large-size annular magnetic core is disassembled into a plurality of small-size magnetic core unit structures, and the manufacturing of the large-size annular magnetic core is converted into the manufacturing of the standardized small-size magnetic core unit structures, so that the yield of the magnetic core production is greatly improved, and the production cost is reduced;
2. the magnetic core unit structures with the small sizes are spliced into the annular magnetic core with the large size, and the annular magnetic core is applied to the transformer with the large size, so that the purposes of restricting a magnetic circuit and reducing the intensity of a leakage magnetic field can be achieved, and meanwhile, the annular magnetic core has the advantage of high transmission efficiency of the transformer with the large size.
Drawings
FIG. 1 is a schematic structural diagram of a magnetic core unit structure according to the present invention;
FIG. 2 is a schematic diagram of a ring-slot type magnetic core according to the present invention;
FIG. 3 is a schematic structural diagram of the ring-slot type magnetic core of the present invention after being fixed by the skeleton structure;
FIG. 4 is a schematic structural diagram of the primary side or the secondary side of the transformer of the present invention after being fixed by the framework structure;
FIG. 5 is a schematic diagram of a transformer according to the present invention;
fig. 6 is a schematic cross-sectional view of the transformer after the bobbin structure is fixed.
Reference numerals: 1. a magnetic core unit structure; 2. a sector groove; 3. a ring-groove type magnetic core; 31. a ring-groove-type magnetic core of the primary side of the transformer; 32. a ring-groove type magnetic core of the secondary side of the transformer; 4. an annular groove; 41. the ring groove of the ring groove type magnetic core 31; 42. the ring groove of the ring-groove type magnetic core 32; 5. a primary winding; 6. a secondary winding; 7. a transformer primary; 8. a transformer secondary; 9. a framework structure; 10. an annular space.
Detailed Description
The following detailed description of the invention refers to specific embodiments thereof for better understanding by those skilled in the art.
Example 1
A magnetic core unit structure 1 is shown in figure 1, the magnetic core unit structure 1 is fan-shaped and made of soft magnetic materials, and fan-shaped grooves 2 with two open ends are formed in the magnetic core unit structure 1. The central angle corresponding to the fan-shaped structure of the magnetic core unit structure 1 is alpha, the value of alpha is 43-45 degrees, the thickness of the magnetic core unit structure is h, and the value of h is 20-30 mm.
Example 2
A spliced ring-groove-shaped magnetic core 3, as shown in fig. 2, includes a plurality of magnetic core unit structures 1 described in embodiment 1, wherein the plurality of magnetic core unit structures 1 are sequentially connected along a circumferential direction to form the ring-groove-shaped magnetic core 3; the fan-shaped grooves 2 of the magnetic core unit structure 1 are sequentially communicated along the circumferential direction of the ring-groove-shaped magnetic core 3 to form a ring-shaped groove 4 of the ring-groove-shaped magnetic core 3; as shown in fig. 3, a plurality of core unit structures 1 constituting the loop-type core 3 are fixed by a skeleton structure 9.
Example 3
4-6, the transformer comprises a magnetic core, a primary winding 5 and a secondary winding 6, wherein the magnetic core is a ring-groove type magnetic core 3 described in embodiment 2, in this embodiment, there are two ring-groove type magnetic cores 3, which are a ring-groove type magnetic core 31 and a ring-groove type magnetic core 32, as shown in FIG. 4, the primary winding 5 is placed in a ring-groove 41 of the ring-groove type magnetic core 31 to form a primary transformer 7, and the secondary winding 6 is placed in a ring-groove 42 of the ring-groove type magnetic core 32 to form a secondary transformer 8; as shown in fig. 6, the open end of the annular groove 41 of the annular groove-shaped magnetic core 31 of the primary transformer 7 is correspondingly connected with the open end of the annular groove 42 of the annular groove-shaped magnetic core 32 of the secondary transformer 8, and is fixed by the framework structure 9; an annular space 10 is formed between the two correspondingly connected annular groove type magnetic cores 3, and the primary winding 5 and the secondary winding 6 are both positioned in the annular space 10 and are magnetically coupled through the correspondingly connected annular groove type magnetic cores.
Example 4
The present embodiment provides the method for manufacturing the magnetic core unit structure according to embodiment 1, including the following steps:
s1, ferrite embryo forming: pressing ferrite powder into a cubic rough blank through a mechanical tool, wherein each size of the cubic rough blank is larger than the structural size of the magnetic core unit;
s2, sintering: sintering the cubic rough blank at a high temperature through a sintering furnace to form a cubic ferrite core structure;
s3, rough engraving: carving is carried out according to the shape of the magnetic core unit structure by using a carving machine, and the carved overall dimension is expanded by 1-2 mm on the basis of the size of the magnetic core unit structure.
S4, engraving: and engraving according to the fan-shaped magnetic core structure by using an engraving machine, wherein the accuracy of the engraved outline dimension is controlled within a required range.
The magnetic core structure and the manufacturing method of the large-size spliced transformer provided by the invention are described in detail above. The principles and embodiments of the present invention are explained herein using specific examples, which are set forth only to aid in understanding the methods and concepts of the invention, and the directional terms used are, for example: upper, lower, left, right, front, rear, etc. are directions with reference to the drawings only, and directional terms used are intended to illustrate and not to limit the present invention. It should be noted that, for those skilled in the art, it is possible to make various improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the scope of the claims of the present invention.
Claims (7)
1. A magnetic core unit structure is characterized in that the magnetic core unit structure is fan-shaped and made of soft magnetic materials, and fan-shaped grooves with openings at two ends are formed in the magnetic core unit structure.
2. A magnetic core unit structure according to claim 1, wherein the sector structure of the magnetic core unit structure has a corresponding central angle of 43-45 °, and the thickness of the magnetic core unit structure is 20-30 mm.
3. A spliced ring-groove-shaped magnetic core, which comprises a plurality of magnetic core unit structures as claimed in claim 1, wherein the plurality of magnetic core unit structures are sequentially connected along the circumferential direction to form the ring-groove-shaped magnetic core; the fan-shaped grooves of the magnetic core unit structure are sequentially communicated along the circumferential direction of the ring-groove-type magnetic core to form a ring-groove-type magnetic core.
4. The split ring-groove-type magnetic core according to claim 3, wherein a plurality of the magnetic core unit structures constituting the ring-groove-type magnetic core are fixed by a skeleton structure.
5. A transformer, comprising a magnetic core, a primary winding and a secondary winding, wherein the magnetic core is a ring-slot type magnetic core as claimed in claim 3 or 4, each primary winding or secondary winding is correspondingly disposed in a ring slot of one of the ring-slot type magnetic cores, and constitutes a primary or secondary of the transformer, respectively; the primary annular magnetic core of the transformer and the secondary annular magnetic core of the transformer are correspondingly connected with each other to form the transformer.
6. The transformer according to claim 5, wherein the open end of the ring-shaped slot of the ring-shaped magnetic core of the primary side of the transformer is correspondingly connected with the open end of the ring-shaped slot of the ring-shaped magnetic core of the secondary side of the transformer, and is fixed by the framework structure.
7. A method of manufacturing a magnetic core cell structure according to claim 1, comprising the steps of:
s1, ferrite embryo forming: pressing ferrite powder into a cubic rough blank through a mechanical tool, wherein each size of the cubic rough blank is larger than the structural size of the magnetic core unit;
s2, sintering: sintering the cubic rough blank at a high temperature through a sintering furnace to form a cubic ferrite core structure;
s3, rough engraving: carving is carried out according to the shape of the magnetic core unit structure by using a carving machine, and the carved overall dimension is expanded by 1-2 mm on the basis of the size of the magnetic core unit structure.
S4, engraving: and engraving according to the fan-shaped magnetic core structure by using an engraving machine, wherein the accuracy of the engraved outline dimension is controlled within a required range.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011417427.3A CN112614666A (en) | 2020-12-07 | 2020-12-07 | Magnetic core structure and manufacturing method of large-size spliced transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011417427.3A CN112614666A (en) | 2020-12-07 | 2020-12-07 | Magnetic core structure and manufacturing method of large-size spliced transformer |
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| CN112614666A true CN112614666A (en) | 2021-04-06 |
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| CN202011417427.3A Pending CN112614666A (en) | 2020-12-07 | 2020-12-07 | Magnetic core structure and manufacturing method of large-size spliced transformer |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115116732A (en) * | 2022-07-18 | 2022-09-27 | 四川东阁科技有限公司 | Pot-shaped alloy magnetic core and preparation method thereof |
| WO2023011448A1 (en) * | 2021-08-02 | 2023-02-09 | Shanghai United Imaging Healthcare Co., Ltd. | Power transformers and medical devices |
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| CN101026033A (en) * | 2005-12-01 | 2007-08-29 | 通用电气公司 | Contactless power transfer system |
| CN101800126A (en) * | 2010-04-12 | 2010-08-11 | 东莞市源殿电子科技有限公司 | Preparation process and product of low magnetic leakage and air gap-free annular iron core |
| CN203406126U (en) * | 2013-08-09 | 2014-01-22 | 衡阳一互电气有限公司 | Hollow coil provided with closed magnetic circuit |
| CN204577218U (en) * | 2015-03-24 | 2015-08-19 | 横店集团东磁股份有限公司 | A kind of E type magnetic ferrite magnetic core |
| CN207652155U (en) * | 2017-12-22 | 2018-07-24 | 深圳市乐丰科技有限公司 | Rotor assembly on disc type electric machine |
| CN110668806A (en) * | 2019-10-30 | 2020-01-10 | 陈海艳 | Preparation method of soft magnetic ferrite for high frequency |
| CN110828132A (en) * | 2019-11-08 | 2020-02-21 | 安徽昭田电子科技有限公司 | Eight diagrams fan-shaped eight-part combined ferrite magnetic core for switch mode power supply and manufacturing process thereof |
| CN211016721U (en) * | 2019-11-21 | 2020-07-14 | 安登利电子(深圳)有限公司 | Annular magnetic core for reactor |
| CN111584225A (en) * | 2020-05-25 | 2020-08-25 | 南通华兴磁性材料有限公司 | Forming method of flat ultra-thin power transformer magnetic core |
-
2020
- 2020-12-07 CN CN202011417427.3A patent/CN112614666A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101026033A (en) * | 2005-12-01 | 2007-08-29 | 通用电气公司 | Contactless power transfer system |
| CN101800126A (en) * | 2010-04-12 | 2010-08-11 | 东莞市源殿电子科技有限公司 | Preparation process and product of low magnetic leakage and air gap-free annular iron core |
| CN203406126U (en) * | 2013-08-09 | 2014-01-22 | 衡阳一互电气有限公司 | Hollow coil provided with closed magnetic circuit |
| CN204577218U (en) * | 2015-03-24 | 2015-08-19 | 横店集团东磁股份有限公司 | A kind of E type magnetic ferrite magnetic core |
| CN207652155U (en) * | 2017-12-22 | 2018-07-24 | 深圳市乐丰科技有限公司 | Rotor assembly on disc type electric machine |
| CN110668806A (en) * | 2019-10-30 | 2020-01-10 | 陈海艳 | Preparation method of soft magnetic ferrite for high frequency |
| CN110828132A (en) * | 2019-11-08 | 2020-02-21 | 安徽昭田电子科技有限公司 | Eight diagrams fan-shaped eight-part combined ferrite magnetic core for switch mode power supply and manufacturing process thereof |
| CN211016721U (en) * | 2019-11-21 | 2020-07-14 | 安登利电子(深圳)有限公司 | Annular magnetic core for reactor |
| CN111584225A (en) * | 2020-05-25 | 2020-08-25 | 南通华兴磁性材料有限公司 | Forming method of flat ultra-thin power transformer magnetic core |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023011448A1 (en) * | 2021-08-02 | 2023-02-09 | Shanghai United Imaging Healthcare Co., Ltd. | Power transformers and medical devices |
| CN115116732A (en) * | 2022-07-18 | 2022-09-27 | 四川东阁科技有限公司 | Pot-shaped alloy magnetic core and preparation method thereof |
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