CN209045287U - A kind of high frequency transformer - Google Patents
A kind of high frequency transformer Download PDFInfo
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- CN209045287U CN209045287U CN201821886228.5U CN201821886228U CN209045287U CN 209045287 U CN209045287 U CN 209045287U CN 201821886228 U CN201821886228 U CN 201821886228U CN 209045287 U CN209045287 U CN 209045287U
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- coil winding
- air gap
- primary coil
- transformer
- high frequency
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- 238000004804 winding Methods 0.000 claims abstract description 105
- 239000000178 monomer Substances 0.000 claims abstract description 31
- 239000000203 mixture Substances 0.000 claims abstract description 4
- 239000002390 adhesive tape Substances 0.000 claims description 4
- 239000004411 aluminium Substances 0.000 claims description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 4
- 229910052782 aluminium Inorganic materials 0.000 claims description 4
- 150000002466 imines Chemical group 0.000 claims description 4
- 238000005192 partition Methods 0.000 claims description 4
- 230000035699 permeability Effects 0.000 claims description 3
- 238000000034 method Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 7
- 239000000463 material Substances 0.000 abstract description 7
- 230000002349 favourable effect Effects 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 13
- 230000017525 heat dissipation Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000012141 concentrate Substances 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Abstract
This application provides a kind of high frequency transformers, including shell, and at least one set of transformer group by multiple transformer monomer compositions；Each transformer monomer includes magnetic core and winding coil；The magnetic core includes upper yoke, lower yoke and three air gap columns；The primary coil winding and secondary coil winding technique are on being located in the middle air gap column；The primary coil winding, secondary coil winding and the air gap column positioned at two sides are in contact with the inner wall of accommodating cavity respectively.Using three air gap columns, the thickness of single air gap is reduced, air gap diffraction effect is effectively reduced, and then reduce the loss of primary coil winding and secondary coil winding, to reduce heat caused by coil.And primary coil winding, secondary coil winding and the air gap column positioned at two sides are in contact with the inner wall of accommodating cavity respectively, are more favorable for radiating, and extend the service life of product, and without filling Heat Conduction Material, reduce cost.
Description
Technical field
This application involves field transformer more particularly to a kind of high frequency transformers.
Background technique
With the continuous development of switch power technology, power supply device develops to miniaturization, lightweight direction, the switch of power supply
Frequency also gradually high frequency, but under traditional hard switching mode, easily increase switching loss, influences efficiency.Soft switch technique
Above-mentioned contradiction is then alleviated in appearance to a certain extent.LLC resonant converter is high-efficient with its, power density is big, control precision is high
Many advantages, such as be concerned in communication power supply field, be widely used in the fields such as space flight, electronics, communication.In recent years, with electricity
The emergence and development of electrical automobile, Switching Power Supply are widely developed and promote in terms of electric automobile charging station.
Resonant network in LLC resonant converter, needs using resonant inductance and high frequency transformer.It is shown in figure 1 to be
Traditional resonant network, it can be seen that resonant inductance Lr and high frequency transformer in traditional resonant network are independently separated
Device, so not only wasting space, but also electromagnetic interference is big, lead to that product efficiency is low, volume increases.
To solve the above-mentioned problems, existing resonant network uses resonant network as illustrated in FIG. 2, by resonant inductance Lr
It is simply integrated in high frequency transformer, does resonant inductance use using the leakage inductance of high frequency transformer, and air gap column concentrates on
On center pillar, referring specifically to Fig. 3, such structure causes single air gap thickness big, and air gap diffraction effect is obvious, coil loss compared with
Greatly, amount of heat is generated, the service life of product is shortened.
Utility model content
This application provides a kind of high frequency transformer, with solve the coil of existing transformer in single air gap thickness big, gas
The problem of gap diffraction effect is obvious, and coil loss is larger, generates amount of heat, shortens the service life of product.
This application provides a kind of high frequency transformers, including shell, and at least one set is by multiple transformer monomer compositions
Transformer group；
Equipped with multiple partitions arranged respectively along the length direction of shell and width direction in the shell, so that in shell
Several accommodating cavities are formed, the accommodating cavity is for accommodating transformer monomer；
Each transformer monomer includes magnetic core and winding coil；
The winding coil includes primary coil winding and secondary coil winding；
The magnetic core includes upper yoke, lower yoke and three air gap columns；
The upper yoke and lower yoke are arranged in parallel, and three air gap columns are set to the upper yoke and lower yoke
Between iron, and each air gap column is perpendicular with the upper yoke and lower yoke；
The primary coil winding and secondary coil winding technique are on being located in the middle air gap column；
The primary coil winding, secondary coil winding and positioned at two sides air gap column respectively with the inner wall phase of accommodating cavity
Contact.
Further, the primary coil winding of multiple transformer monomers of transformer group described in every group uses star-like connection side
Formula connection, and secondary coil winding also uses star-like connection mode to connect.
Further, each air gap column is formed by multiple magnetic monomers are be bonded with insulating paper alternating.
Further, the insulating paper with a thickness of 0.15mm.
Further, the number of plies of the primary coil winding technique is calculated by following formula:
Wherein, Lk is the leakage inductance of primary coil winding, and Np is the total number of turns of primary coil winding, and l is window width, and m is
Total number of plies, Tn are primary coil winding n-th layer thickness, and Rn is the n-th layer number of turns and the ratio between total number of turns of primary coil winding,
Kn is the energy coefficient of primary coil winding n-th layer, and μ 0 is space permeability, and lavn is be n-th layer primary coil winding flat
Equal circle is long.
Further, the primary coil winding of each transformer monomer and secondary coil winding and it is located in the middle gas
Insulating layer is equipped between gap column.
Further, the insulating layer is imines adhesive tape.
Further, the shell is made of aluminium sheet.
From the above technical scheme, this application provides a kind of high frequency transformers is reduced single using three air gap columns
The thickness of air gap is effectively reduced air gap diffraction effect, and then reduces the loss of primary coil winding and secondary coil winding, to drop
Heat caused by low coil.And primary coil winding, secondary coil winding and positioned at two sides air gap column respectively with appearance
The inner wall for setting chamber is in contact, and is more favorable for radiating, and extends the service life of product, and without filling Heat Conduction Material, reduce at
This.
Detailed description of the invention
In order to illustrate more clearly of the technical solution of the application, letter will be made to attached drawing needed in the embodiment below
Singly introduce, it should be apparent that, for those of ordinary skills, without any creative labor,
It is also possible to obtain other drawings based on these drawings.
Fig. 1 is the circuit diagram of an embodiment of the LLC resonant converter of the prior art；
Fig. 2 is the circuit diagram of another embodiment of the LLC resonant converter of the prior art；
Fig. 3 is the structural schematic diagram of the magnetic core of the prior art；
Fig. 4 is the structural schematic diagram of the magnetic core in the application；
Fig. 5 is the structural schematic diagram of the transformer monomer in the application；
Fig. 6 is the structural schematic diagram of the shell in the application；
Fig. 7 is the coiling schematic diagram of transformer in the prior art；
Fig. 8 is the structural schematic diagram of the transformer of the prior art；
Fig. 9 is the structural schematic diagram of PQ type magnetic core；
Figure 10 is the structural schematic diagram of shell in the prior art；
Figure 11 is a kind of structural schematic diagram of one embodiment of high frequency transformer provided by the present application；
Figure 12 is the exemplary diagram of the winding method of the transformer of the prior art；
Figure 13 is the exemplary diagram of the winding method of high frequency transformer provided by the present application.
Wherein, 1- air gap, the upper yoke of 2-, 3- insulating paper, 4- magnetic monomer, 5- lower yoke, 6- air gap column, 7- accommodating cavity it is interior
Wall, 8- coil windings, 9- shell, 10- partition, 11- skeleton, 12- primary coil winding, 13- secondary coil winding, 14- magnetic core,
The connector lug of 15- primary coil winding, the connector lug of 16- secondary coil winding.
Specific embodiment
- Fig. 6 referring to fig. 4, the embodiment of the present application provide a kind of high frequency transformer, including shell 9, and it is at least one set of by
The transformer group of multiple transformer monomer compositions；
Equipped with multiple partitions 10 arranged respectively along the length direction and width direction of shell 9 in the shell 9, so that shell
Several accommodating cavities are formed in body 9, the accommodating cavity is for accommodating transformer monomer；
Each transformer monomer includes magnetic core 14 and winding coil；
The winding coil includes primary coil winding 12 and secondary coil winding 13；
The magnetic core 14 includes upper yoke 2, lower yoke 5 and three air gap columns 6；
The upper yoke 2 and lower yoke 5 are arranged in parallel, and three air gap columns 6 be set to the upper yoke 2 with
Between lower yoke 5, and each air gap column 6 is perpendicular with the upper yoke 2 and lower yoke 5；
The primary coil winding 12 and secondary coil winding 13, which are wound on, to be located in the middle on air gap column 6；
The primary coil winding 12, secondary coil winding 13 and positioned at two sides air gap column 6 respectively with accommodating cavity
Inner wall 7 is in contact.
In the prior art, referring specifically to Fig. 7, the side of the 12 coiling skeleton 11 of primary coil winding of transformer monomer,
Secondary coil winding 13 is wound on the other side of skeleton 11, and as Figure 8-Figure 10, in transformer monomer only magnetic core 14 with
The inner wall of shell 9 contacts, in order to increase radiating rate, in primary coil winding 12 and secondary coil winding 13 and 9 inner wall of shell
Gap in fill Heat Conduction Material, and be additionally arranged at the bottom of water-cooled plate in shell 9, therefore, prior art coil is largely sealed
It closes in magnetic core 14, heat is assembled in coil inside, even if passing through Heat Conduction Material and water-cooled plate, it is also difficult to quickly conduct heat
It goes out, easily leads to coil burnout.
And in embodiments herein, first with multiple air gap columns 6, the thickness of single air gap 1 is reduced, is effectively reduced
1 diffraction effect of air gap, and then reduce the loss of primary coil winding 12 and secondary coil winding 13；Secondly, primary coil winding
12, secondary coil winding 13 and the air gap column 6 positioned at two sides are in contact with the inner wall of accommodating cavity 7 respectively, are more favorable for radiating,
Extend the service life of product, and without filling Heat Conduction Material, reduces cost.
Further, the primary coil winding 12 of multiple transformer monomers of transformer group described in every group uses star-like connection
Mode connects, and secondary coil winding 13 is also connected using star-like connection mode.
Specifically, referring to Figure 11 by taking the high frequency transformer of 40KW charger as an example, in figure use two groups of transformer groups, 15
It is the connector lug of the secondary coil winding 13 of transformer monomer for the connector lug of the primary coil winding 12 of transformer monomer, 16,
Transformer monomer T1-T3 is one group, and transformer T4-T6 is one group, the primary winding coil and secondary of every group of transformer monomer
Winding coil is all made of star-like connection mode and connects.
Further, referring to Fig. 3, each air gap column 6 is formed by multiple magnetic monomers 4 are be bonded with the alternating of insulating paper 3.Make
For 1 material of air gap, from production angle, 0.08mm, 0.13mm, 0.15mm, 0.2mm and 0.3mm is can be used in the thickness of insulating paper 3.
Using following formula it can be seen that 1 thickness of air gap is smaller, diffraction breadth is smaller, and coil and magnetic core 14 avoid distance just
It is smaller.Therefore, under the premise of keeping product design compact, the insulating layer between coil and magnetic core 14 is than relatively thin, coil to magnetic core
14 insulation distance is 0.18mm.In order to guarantee the operability of manufacture craft, air gap 1 should not use very thin insulating paper 3, comprehensive
Factor of both closing 1 diffraction breadth of technique and air gap considers that it is best for using the insulating paper 3 of 0.15mm thickness.
Wherein, w is air gap diffraction breadth, and δ is air gap thickness, and b is the height of magnetic monomer, generally takes 8mm.
Further, the number of plies of 12 coiling of primary coil winding is calculated by following formula:
Wherein, Lk is the leakage inductance of primary coil winding, and Np is the total number of turns of primary coil winding, and l is window width, and m is
Total number of plies, Tn are primary coil winding n-th layer thickness, and Rn is the n-th layer number of turns and the ratio between total number of turns of primary coil winding,
Kn is the energy coefficient of primary coil winding n-th layer, and μ 0 is space permeability, π × 10 μ 0=4-7Newton/ampere2, lavn is yes
The average turn of n-th layer primary coil winding is long.
In the prior art, with primary coil winding 12 be 14 circles, secondary coil winding 13 be 10 circles for, such as Figure 12 institute
Show, existing method for winding by primary coil winding 12 and secondary coil winding 13 around being made as 3 layers, cause the coil winding number of plies compared with
More, heat dissipation area is smaller, and heat caused by the coil of inner layer is difficult to come out, and leads to the concentration of heat.
And in the embodiment of the present application, continue with primary coil winding 12 as 14 circles, secondary coil winding 13 is that 10 circles are
Example is as shown in figure 13 definite value for parameter l, Tn, kn using above-mentioned formula, and LK is to meet design requirement, needs to be arranged
In a certain range, therefore, the number of plies that primary coil winding 12 can be calculated by above-mentioned formula is 2, therefore, with the prior art
It compares, the method for winding of the embodiment of the present application reduces the coil winding number of plies, increases heat dissipation area, and produced by the coil of inner layer
Heat be more easier to come out, be conducive to the heat dissipation of coil；And the winding also effectively reduces high frequency kindred effect, thus
The loss for reducing coil, also just reduces the generation of coil heat.
Further, the primary coil winding 12 of each transformer monomer and secondary coil winding 13 be located at centre
Air gap column 6 between be equipped with insulating layer.Preferably, the insulating layer is imines adhesive tape, and imines adhesive tape has excellent resistance to height
Warm nature, electric insulating quality, caking property, radiation resistance, resistance to medium, chemical stability and anti-flammability.
Further, the shell 9 is made of aluminium sheet, and aluminium sheet is more conducive to the conduction of transformer monomer heat, accelerates to become
The radiating rate of depressor monomer.
From the above technical scheme, this application provides a kind of high frequency transformers is reduced single using three air gap columns 6
The thickness of a air gap 1, is effectively reduced 1 diffraction effect of air gap, and then reduces primary coil winding 12 and secondary coil winding 13
Loss, to reduce heat caused by coil.And primary coil winding 12, secondary coil winding 13 and the gas positioned at two sides
Gap column 6 is in contact with the inner wall of accommodating cavity 7 respectively, is more favorable for radiating, and extends the service life of product, and lead without filling
Hot material reduces cost.
Claims (8)
1. a kind of high frequency transformer, which is characterized in that including shell (9), and at least one set is by multiple transformer monomer compositions
Transformer group；
Equipped with multiple partitions (10) arranged respectively along the length direction and width direction of shell (9) in the shell (9), so that
Several accommodating cavities are formed in shell (9), the accommodating cavity is for accommodating transformer monomer；
Each transformer monomer includes magnetic core (14) and winding coil；
The winding coil includes primary coil winding (12) and secondary coil winding (13)；
The magnetic core (14) includes upper yoke (2), lower yoke (5) and three air gap columns (6)；
The upper yoke (2) and lower yoke (5) are arranged in parallel, and three air gap columns (6) are set to the upper yoke
(2) between lower yoke (5), and each air gap column (6) is perpendicular with the upper yoke (2) and lower yoke (5)；
The primary coil winding (12) and secondary coil winding (13), which are wound on, to be located in the middle on air gap column (6)；
The primary coil winding (12), secondary coil winding (13) and positioned at two sides air gap column (6) respectively with accommodating cavity
Inner wall (7) be in contact.
2. high frequency transformer as described in claim 1, which is characterized in that multiple transformer monomers of transformer group described in every group
Primary coil winding (12) connected using star-like connection mode, and secondary coil winding (13) is also connected using star-like connection mode
It connects.
3. high frequency transformer as described in claim 1, which is characterized in that each air gap column (6) is by multiple magnetic monomers (4)
It is be bonded with insulating paper (3) alternating to form.
4. high frequency transformer as claimed in claim 3, which is characterized in that the insulating paper (3) with a thickness of 0.15mm.
5. high frequency transformer as described in claim 1, which is characterized in that the number of plies of primary coil winding (12) coiling by
Following formula is calculated:
Wherein, Lk is the leakage inductance of primary coil winding, and Np is the total number of turns of primary coil winding, and l is window width, and m is total layer
Number, Tn are primary coil winding n-th layer thickness, and Rn is the ratio between n-th layer number of turns and total number of turns of primary coil winding, and kn is
The energy coefficient of primary coil winding n-th layer, μ 0 are space permeability, and lavn is the average turn for being n-th layer primary coil winding
It is long.
6. high frequency transformer as described in claim 1, which is characterized in that the primary coil winding of each transformer monomer
(12) and secondary coil winding (13) and be located in the middle between air gap column (6) be equipped with insulating layer.
7. high frequency transformer as claimed in claim 6, which is characterized in that the insulating layer is imines adhesive tape.
8. high frequency transformer as described in claim 1, which is characterized in that the shell (9) is made of aluminium sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821886228.5U CN209045287U (en) | 2018-11-15 | 2018-11-15 | A kind of high frequency transformer |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821886228.5U CN209045287U (en) | 2018-11-15 | 2018-11-15 | A kind of high frequency transformer |
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| Publication Number | Publication Date |
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| CN209045287U true CN209045287U (en) | 2019-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201821886228.5U Active CN209045287U (en) | 2018-11-15 | 2018-11-15 | A kind of high frequency transformer |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109326412A (en) * | 2018-11-15 | 2019-02-12 | 宁夏银利电气股份有限公司 | A kind of high frequency transformer |
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2018
- 2018-11-15 CN CN201821886228.5U patent/CN209045287U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109326412A (en) * | 2018-11-15 | 2019-02-12 | 宁夏银利电气股份有限公司 | A kind of high frequency transformer |
| CN109326412B (en) * | 2018-11-15 | 2024-03-15 | 宁夏银利电气股份有限公司 | High-frequency transformer |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A high-frequency transformer Granted publication date: 20190628 Pledgee: Yinchuan SME Financing Guarantee Co.,Ltd. Pledgor: NINGXIA YINLI ELECTRIC CO.,LTD. Registration number: Y2024640000007 |
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| PE01 | Entry into force of the registration of the contract for pledge of patent right |