CN108231366A - Three-phase high frequency transformer - Google Patents
Three-phase high frequency transformer Download PDFInfo
- Publication number
- CN108231366A CN108231366A CN201711482286.1A CN201711482286A CN108231366A CN 108231366 A CN108231366 A CN 108231366A CN 201711482286 A CN201711482286 A CN 201711482286A CN 108231366 A CN108231366 A CN 108231366A
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- China
- Prior art keywords
- iron yoke
- core
- sides
- core limb
- yoke
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F19/00—Fixed transformers or mutual inductances of the signal type
- H01F19/04—Transformers or mutual inductances suitable for handling frequencies considerably beyond the audio range
-
- 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
- H01F27/255—Magnetic cores made from particles
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Multimedia (AREA)
- Coils Of Transformers For General Uses (AREA)
Abstract
The present invention relates to a kind of three-phase high frequency transformers.The purpose is to provide a kind of three-phase high frequency transformer, it can realize that three-phase magnetic resistance balances so that its core limb can use Ferrite Material as magnetic core, and simple in structure.A kind of three-phase high frequency transformer, including：One upper main iron yoke, main iron yoke and three core limbs under one, around there are one primary coils and a secondary coil on each core limb；The both ends of upper main iron yoke are connected to two core limbs of both sides, and the both ends of lower main iron yoke are connected to two core limbs of both sides, and the middle part of the upper and lower ends of intermediate core limb respectively with the middle part of upper main iron yoke and lower main iron yoke is connect；It is set above upper main iron yoke there are one upper secondary iron yoke, the both ends of upper pair iron yoke are connected to two iron core columns of both sides, gap is equipped between upper pair iron yoke and upper main iron yoke；It is set below lower main iron yoke there are one lower secondary iron yoke, the both ends of lower pair iron yoke are connected to two iron core columns of both sides, gap is equipped between lower pair iron yoke and lower main iron yoke.
Description
Technical field
The present invention relates to power electronic equipments, are to be related to a kind of three-phase high frequency transformer specifically.
Background technology
With the development of Power Electronic Technique and the application of high-frequency high-power power electronic devices, power electronic equipment
Frequency is higher and higher, and capacity constantly increases, it is therefore desirable to which high-frequency high-power transformer is adapted therewith.Recently, with high-power
The appearance of high frequency switching device and magnetic core, the manufacture for high-frequency high-power transformer create condition.
The transformer of large capacity in the past, working frequency are 50Hz or 60Hz, referred to as Industrial Frequency Transformer.Work as power electronic system
When the working frequency of transformer is tens or hundreds of kilo hertzs, for Industrial Frequency Transformer, high frequency transformer can be referred to as.With
High frequency transformer is compared, and the volume of Industrial Frequency Transformer is very big.The transformer of Same Efficieney, high frequency transformer compare Industrial Frequency Transformer
Volume it is much smaller.And with the raising of frequency, volume can further become smaller.Because frequency improves, required coil
The number of turn tails off, and core cross section product becomes smaller, thus volume of transformer can become smaller.
High frequency transformer (tens, hundreds of kilo hertzs of frequency or higher) of the prior art, is usually all made as single-phase change
Depressor.With the appearance of modular multilevel translation circuit, high frequency transformer can also be made three-phase transformer.It in this way can be with
Volume of transformer is further reduced, makes its occupied space smaller, manufacture cost also further reduces.
High frequency transformer magnetic core generally selects the small ferrite of high-frequency loss, for the high permeability materials such as silicon steel,
Magnetic resistance using ferritic magnetic core is relatively large.If continuing to use traditional three-phase transformer core structure, three-phase circuit magnetic
It is larger to hinder difference, can not solve the problems, such as that three-phase magnetic resistance is unbalanced.
Invention content
The purpose of the present invention is overcoming shortcoming of the prior art, a kind of three-phase high frequency transformer, Neng Goushi are provided
Existing three-phase magnetic resistance balance so that its core limb can use Ferrite Material as magnetic core, and simple in structure.
The object of the present invention is achieved like this：
A kind of three-phase high frequency transformer, including：One upper main iron yoke, main iron yoke and three core limbs under one, Mei Getie
Around there are one primary coils and a secondary coil on stem；The both ends of the upper main iron yoke are respectively connected to be arranged on both sides
Two core limbs top, the both ends of the lower main iron yoke are respectively connected to described be arranged under two core limbs of both sides
Portion is arranged on middle part of the upper and lower ends of intermediate core limb respectively with the middle part of upper main iron yoke and lower main iron yoke and connect；Institute
It states and is set above main iron yoke there are one upper secondary iron yoke, the both ends of the upper secondary iron yoke are connected to be arranged on both sides two
The top of iron core column is equipped with gap between the upper secondary iron yoke and upper main iron yoke；There are one being set below the lower main iron yoke
Lower pair iron yoke, the both ends of the lower secondary iron yoke are connected to the lower part of two iron core columns for being arranged on both sides, the lower secondary iron
Gap is equipped between yoke and lower main iron yoke.
When forming flux circuit between two core limbs for being arranged on both sides, two iron for being arranged on both sides
Stem forms magnetic flux major loop, while two core limbs for being arranged on both sides and institute with the upper main iron yoke and lower main iron yoke
It states secondary iron yoke and lower secondary iron yoke forms the auxiliary circuit of magnetic flux.
When a core limb for being arranged on intermediate core limb and two core limbs for being arranged on both sides is formed
During flux paths, due to there is gap between major and minor iron yoke, magnetic is not formed between core limb and the upper secondary iron yoke and lower secondary iron yoke
Road all；When it is described be arranged on intermediate core limb and two core limbs for being arranged on both sides be respectively formed flux paths
When, do not form flux paths between core limb and the upper secondary iron yoke and lower secondary iron yoke.
Wherein, in design, for the convenience of processing, usually by the clearance gap between the upper secondary iron yoke and upper main iron yoke
From 5-10mm is designed to, the clearance distance between the lower secondary iron yoke and lower main iron yoke is designed to 5-10mm.
Wherein, the upper main iron yoke, lower main iron yoke, upper secondary iron yoke, lower secondary iron yoke are silicon steel iron yoke, amorphous/nanocrystalline iron
Yoke or ferromagnetic oxide powder iron yoke；Three core limbs are silicon steel core limb, amorphous/nanocrystalline core limb or ferromagnetic oxide powder iron
Stem.
Three-phase transformer is since the magnetic circuit between being arranged on the core limb of both sides is longer, between the core limb that can cause both sides
Flux circuit magnetic resistance it is larger compared to the magnetic resistance difference of the flux circuit between other two-phases, cause three-phase magnetic resistance uneven
Weighing apparatus.And three-phase high frequency transformer structure provided by the present invention, by increasing by one piece of secondary iron yoke in each up and down of main iron yoke so that
When both sides core limb forms flux paths, the auxiliary circuit of magnetic flux can be formed with secondary iron yoke, increase magnetic circuit area so that magnetic resistance becomes
It is small, and when the core limb for being arranged on intermediate core limb and both sides is respectively formed flux paths, between major and minor iron yoke
The presence of gap, and do not form the auxiliary circuit of magnetic flux, so as to reach the balance of magnetic resistance between three-phase；With three single-phase high frequency transformer phases
Than it is also lower to manufacture cost for three-phase high frequency transformer volume smaller of the present invention, the occupied space smaller of equivalent capability.
Description of the drawings
By embodiment of the invention below and description taken together with the accompanying drawings, the other advantages and features of the present invention are shown, it should
Embodiment provides by way of example, and but it is not limited to this, wherein：
Fig. 1 show the structure diagram of a preferred embodiment of three-phase transformer of the present invention.
Fig. 2 show instantaneous magnetic during two core limbs formation flux paths that both sides are arranged in embodiment illustrated in fig. 1
The schematic diagram in logical circuit.
Fig. 3, which is shown, to be arranged on intermediate core limb and is arranged in two core limbs of both sides in embodiment illustrated in fig. 1
A core limb (left side) formed flux paths when transient magnetic flux circuit schematic diagram.
Fig. 4, which is shown, to be arranged on intermediate core limb and is arranged in two core limbs of both sides in embodiment illustrated in fig. 1
A core limb (right side) formed flux paths when transient magnetic flux circuit schematic diagram.
Fig. 5 show two core limbs point that intermediate core limb is arranged in embodiment illustrated in fig. 1 and is arranged on both sides
Not Xing Cheng flux paths when transient magnetic flux circuit schematic diagram.
Fig. 6 show two core limbs formation flux paths that both sides are arranged in embodiment illustrated in fig. 1, is arranged on simultaneously
It is instantaneous when intermediate core limb and a core limb (left side) the formation flux paths being arranged in two core limbs of both sides
The schematic diagram of flux circuit.
Fig. 7 show two core limbs formation flux paths that both sides are arranged in embodiment illustrated in fig. 1, is arranged on simultaneously
It is instantaneous when intermediate core limb and a core limb (right side) the formation flux paths being arranged in two core limbs of both sides
The schematic diagram of flux circuit.
Specific embodiment
Three-phase high frequency transformer as shown in Figure 1, including：The main upper pair of iron yoke 12, one under one upper main iron yoke 11, one
Secondary iron yoke 22, core limb 31, core limb 32, core limb 33 under iron yoke 21, one.Wherein, upper main iron yoke 11, lower main iron yoke 12,
Upper pair iron yoke 21, lower secondary iron yoke 22 are silicon steel iron yoke, amorphous/nanocrystalline iron yoke or ferromagnetic oxide powder iron yoke, core limb 31, iron core
Column 32, core limb 33 are silicon steel core limb, amorphous/nanocrystalline core limb or ferromagnetic oxide powder core limb.
Core limb 31 and core limb 33 are arranged on both sides, and core limb 32 is arranged on centre, around wired on each core limb
Circle 4, comprising a primary coil and a secondary coil, three primary coil windings, number of turn equal-specification on three core limbs
Completely the same, the parameters such as winding, specification of three secondary coils are completely the same.Upper pair iron yoke 21 is located at the upper of main iron yoke 11
Side, is equipped with gap 5 between upper pair iron yoke 21 and upper main iron yoke 11, lower pair iron yoke 22 is located at the lower section of lower main iron yoke 12, lower pair iron
Gap 5 also is provided between yoke 22 and lower main iron yoke 12.For the convenience of processing, the distance in gap 5 is designed to 5-10mm.Upper main iron
The both ends of yoke 11 are respectively connected to the top of core limb 31 and core limb 33, and the both ends of upper pair iron yoke 21 are also respectively connected to iron core
The top of column 31 and core limb 33, the both ends of lower main iron yoke 12 are respectively connected to the lower part of core limb 31 and core limb 33, lower pair
The both ends of iron yoke 22 are also respectively connected to the lower part of core limb 31 and core limb 33, the upper and lower ends of core limb 32 respectively with upper master
The middle part of iron yoke 11 is connected with the middle part of lower main iron yoke 12.
When between core limb 31 and core limb 33 formed flux circuit when, core limb 31, core limb 33, upper main iron yoke 11,
Lower main iron yoke 12 forms magnetic flux major loop, while core limb 31, core limb 33, upper secondary iron yoke 21, lower secondary iron yoke 22 form magnetic flux
Auxiliary circuit, as shown in Fig. 2, Fig. 6, Fig. 7.
When core limb 32 and core limb 31 form flux paths, transient magnetic flux circuit is as shown in Fig. 3, Fig. 5, Fig. 6.
When core limb 32 and core limb 33 form flux paths, transient magnetic flux circuit is as shown in Fig. 4, Fig. 5, Fig. 7.
At any one time, magnetic resistance balances the present invention between can realizing three-phase due to the above structure, so that its
In the voltage value of a phase be equal to the voltage value of an other phase or the sum of the voltage of other two-phase.
Although the present invention is hereinbefore illustrated according to preferred embodiment, it is not intended that the scope of the present invention is only
Above-mentioned structure is confined to, if what those skilled in the art can easily develop after above-mentioned explanation is read
Equivalent substitution structure, the equivalent changes and modifications made under the spirit and scope for not departing from the present invention should all be covered by this hair
Within bright the scope of the claims.
Claims (6)
1. a kind of three-phase high frequency transformer, which is characterized in that including：One upper main iron yoke, main iron yoke and three iron cores under one
Column, around there are one primary coils and a secondary coil on each core limb；
The both ends of the upper main iron yoke are respectively connected to be arranged on the top of two core limbs of both sides, and the two of the lower main iron yoke
End is respectively connected to the lower part of two core limbs for being arranged on both sides, is arranged on the upper and lower ends difference of intermediate core limb
It is connect with the middle part of upper main iron yoke and the middle part of lower main iron yoke；
It is set above main iron yoke described there are one upper secondary iron yoke, the both ends of the upper secondary iron yoke, which are connected to, described is arranged on two
The top of two iron core columns of side is equipped with gap between the upper secondary iron yoke and upper main iron yoke；
It is set below the lower main iron yoke there are one lower secondary iron yoke, the both ends of the lower secondary iron yoke, which are connected to, described is arranged on two
The lower part of two iron core columns of side is equipped with gap between the lower secondary iron yoke and lower main iron yoke.
2. three-phase high frequency transformer as described in claim 1, it is characterised in that：When two core limbs for being arranged on both sides
Between when forming flux circuit, two core limbs for being arranged on both sides and the upper main iron yoke and lower main iron yoke form magnetic flux
Major loop, while two core limbs for being arranged on both sides form the auxiliary circuit of magnetic flux with the upper secondary iron yoke and lower secondary iron yoke.
3. three-phase high frequency transformer as described in claim 1, it is characterised in that：Intermediate core limb and institute are arranged on when described
When stating the core limb formation flux paths for two core limbs for being arranged on both sides, core limb and the upper secondary iron yoke and lower pair
Flux paths are not formed between iron yoke.
4. three-phase high frequency transformer as described in claim 1, it is characterised in that：Intermediate core limb and institute are arranged on when described
State when being respectively formed flux paths of two core limbs for being arranged on both sides, core limb and the upper secondary iron yoke and lower secondary iron yoke it
Between do not form flux paths.
5. three-phase high frequency transformer as described in claim 1, it is characterised in that：The gap is 5-10mm.
6. three-phase high frequency transformer according to any one of claims 1 to 5, it is characterised in that：The upper main iron
Yoke, lower main iron yoke, upper secondary iron yoke, lower secondary iron yoke are silicon steel iron yoke, amorphous/nanocrystalline iron yoke or ferromagnetic oxide powder iron yoke；It is described
Three core limbs are silicon steel core limb, amorphous/nanocrystalline core limb or ferromagnetic oxide powder core limb.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711482286.1A CN108231366A (en) | 2017-12-29 | 2017-12-29 | Three-phase high frequency transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711482286.1A CN108231366A (en) | 2017-12-29 | 2017-12-29 | Three-phase high frequency transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108231366A true CN108231366A (en) | 2018-06-29 |
Family
ID=62647313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711482286.1A Pending CN108231366A (en) | 2017-12-29 | 2017-12-29 | Three-phase high frequency transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108231366A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109473266A (en) * | 2019-01-08 | 2019-03-15 | 广东奥莱恩电力科技股份有限公司 | A kind of phase shortage can self-insurance band compensate iron yoke Scott Transformer |
| AT523579A1 (en) * | 2020-03-05 | 2021-09-15 | Avl List Gmbh | Magnetic choke, choke arrangement and converter with choke arrangement |
-
2017
- 2017-12-29 CN CN201711482286.1A patent/CN108231366A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109473266A (en) * | 2019-01-08 | 2019-03-15 | 广东奥莱恩电力科技股份有限公司 | A kind of phase shortage can self-insurance band compensate iron yoke Scott Transformer |
| CN109473266B (en) * | 2019-01-08 | 2023-09-12 | 广东奥莱恩电力科技股份有限公司 | Phase-loss self-carrying compensating iron yoke Scott transformer |
| AT523579A1 (en) * | 2020-03-05 | 2021-09-15 | Avl List Gmbh | Magnetic choke, choke arrangement and converter with choke arrangement |
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