CN206236521U - High frequency transformer - Google Patents
High frequency transformer Download PDFInfo
- Publication number
- CN206236521U CN206236521U CN201621217194.1U CN201621217194U CN206236521U CN 206236521 U CN206236521 U CN 206236521U CN 201621217194 U CN201621217194 U CN 201621217194U CN 206236521 U CN206236521 U CN 206236521U
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- Prior art keywords
- magnetic core
- core
- primary
- sectional area
- additional
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Abstract
The utility model discloses a kind of high frequency transformer, including skeleton, armature winding, secondary windings and magnetic core, the magnetic core includes primary magnetic core, secondary magnetic core and side portion, the side portion and the primary magnetic core, secondary magnetic core constitutes main magnetic circuit, the primary magnetic core and secondary magnetic core are respectively in the primary magnetic core receiving portion and secondary magnetic core receiving portion of the skeleton, the outer wall of the primary magnetic core receiving portion and secondary magnetic core receiving portion is respectively primary coiling portion and secondary coiling portion, the armature winding and secondary windings are wound in the primary coiling portion and secondary coiling portion respectively；The net sectional area of the primary magnetic core is more than the net sectional area of the side portion, the net sectional area of the net sectional area more than the side portion of the secondary magnetic core.Uneven magnetic circuit is formed, can make the magnetic line of force more by air, so as to increase leakage inductance.When resonant mode power supply is produced, without additionally setting independent inductance, production process and wiring complexity are reduced.
Description
Technical field
The utility model is related to field transformer, is more particularly to applied to the transformer in high-frequency circuit.
Background technology
In high frequency switch power application, particularly, it is necessary to be coordinated using resonant inductance and transformer in resonant transformation topology.
Conventional method for designing has two kinds：
1. traditional transformer and independent resonant inductance are used, can so make power supply architecture complicated, volume increase, and
Make pcb board cabling complexity, electromagnetic interference big.Cause that product efficiency is low, volume big, high cost.
2. simply resonant inductance is integrated in transformer, doing resonant inductance by the leakage inductance for increasing transformer uses.
The requirement of distance between generally by changing primary and secondary winding to change the leakage inductance of transformer to reach resonant inductance.Need compared with
Big leakage inductance, it is necessary to increase the distance between primary and secondary winding, can cause volume of transformer increasing, magnetic coupling ability, transformation
Device efficiency of transmission is low, and certain condition limitation under, its leakage inductance can increased scope it is extremely limited.
Utility model content
In order to overcome the deficiencies in the prior art, the purpose of this utility model is to provide a kind of combination resonant inductance (leakage inductance)
High frequency transformer, it can solve existing resonant mode power supply needs to set up separate inductor, and design is complicated, bulky problem.
Can solve it is existing by increasing primary and secondary winding between distance increase leakage inductance effect it is limited, it is difficult to meet application needed for problem.
The purpose of this utility model is realized using following technical scheme：
A kind of high frequency transformer, including skeleton, armature winding, secondary windings and magnetic core, the skeleton include it is hollow just
Level magnetic core receiving portion and secondary magnetic core receiving portion, the magnetic core include primary magnetic core, secondary magnetic core and side portion, the side portion
With the primary magnetic core, secondary magnetic core composition main magnetic circuit, the primary magnetic core and secondary magnetic core are located at the primary magnetic core respectively
In receiving portion and secondary magnetic core receiving portion, the outer wall of the primary magnetic core receiving portion and secondary magnetic core receiving portion be respectively it is primary around
Portion processed and secondary coiling portion, the armature winding and secondary windings are wound on the primary coiling portion and secondary coiling portion respectively
On；The net sectional area of the primary magnetic core is more than the net sectional area of the side portion, the effective cross-section of the secondary magnetic core
Product is more than the net sectional area of the side portion, to form uneven magnetic circuit.
Preferably, the primary magnetic core includes the primary section and the first additional magnetic core of main magnetic core, and the secondary magnetic core includes
The secondary section of main magnetic core and the second additional magnetic core, the first additional magnetic core and the second additional magnetic core respectively with the primary section and
Secondary section is fitted, and the first additional magnetic core is at least partially disposed in the primary magnetic core receiving portion, the second additional magnetic core
It is at least partially disposed at the secondary magnetic core receiving portion.Magnetic core uses main magnetic core and additional magnetic core separate structure, is easy to using existing
The magnetic core of some mass productions realizes effect of the present utility model.
Preferably, the main magnetic core is FERRITE CORE, permalloy magnetic core, non-crystaline amorphous metal magnetic core, ultramicro-crystal alloy magnetic
Core, magnetic powder core, sendust core or iron silicon magnetic core；The additional magnetic core is FERRITE CORE, permalloy magnetic core, amorphous conjunction
Golden magnetic core, ultramicro-crystal alloy magnetic core, magnetic powder core, sendust core or iron silicon magnetic core.
Preferably, the main magnetic core is the UU types combined magnet core or UI type combined magnet cores of openning shape, and the UU types combine magnetic
Core or UI types combined magnet core include two side arms and two side columns, and two side arms are respectively as the primary section and secondary
Portion, the side column is I type magnetic poles as the side portion, the first additional magnetic core and the second additional magnetic core.
Preferably, the ratio between the net sectional area of the primary magnetic core and net sectional area of the side column are 1.1-2.0, institute
It is 1.1-2.0 to state the ratio between the net sectional area of secondary magnetic core and net sectional area of the side column.
Preferably, the main magnetic core is EE types combined magnet core or EI type combined magnet cores, the EE types combined magnet core or EI types
Combined magnet core includes center pillar, two side arms and two side columns, and the center pillar includes the primary section and secondary section, described the
One additional magnetic core and the second additional magnetic core are L-type magnetic pole or I type magnetic poles, the first additional magnetic core and the second additional magnetic core patch
Close in the side of the center pillar；The net sectional area of the primary magnetic core is more than the net sectional area sum of two side arms,
Net sectional area sum of the net sectional area of the secondary magnetic core more than two side arms.
Preferably, the middle part of at least one in two side arms is provided with air gap.Leakage inductance can further be increased.
Preferably, the main magnetic core is EE types combined magnet core or EI type combined magnet cores, the EE types combined magnet core or EI types
Combined magnet core includes center pillar, two side arms and two side columns, and two side arms are respectively as the primary section and secondary
Portion, the first additional magnetic core and the second additional magnetic core are the two of U-shaped magnetic pole additional arms, the first additional magnetic core with
The primary section laminating, the second additional magnetic core is fitted with the secondary section.
Preferably, the center pillar is provided with air gap.Leakage inductance can further be increased.
Preferably, the skeleton be horizontal-type skeleton or vertical-type skeleton, the skeleton also include pin, the armature winding and
Secondary windings includes exit, and the exit is connected with the pin.
Compared to existing technology, the beneficial effects of the utility model are：By making the effective of primary magnetic core and secondary magnetic core
Sectional area forms uneven magnetic circuit more than the net sectional area of side portion, can make the magnetic line of force more by air, so as to increase
Plus leakage inductance.When resonant mode power supply is produced, without additionally setting independent inductance, production process and wiring complexity are reduced.
Brief description of the drawings
Fig. 1 is the decomposing schematic representation of the high frequency transformer that the utility model embodiment one is provided.
Fig. 2 is the structural representation of magnetic core in Fig. 1.
Fig. 3 is the structural representation of the magnetic core of the high frequency transformer that the utility model embodiment two is provided.
Fig. 4 is the structural representation of the magnetic core of the high frequency transformer that the utility model embodiment three is provided.
Fig. 5 is the structural representation of the magnetic core of the high frequency transformer that the utility model example IV is provided.
Specific embodiment
Described above is only the general introduction of technical solutions of the utility model, in order to better understand skill of the present utility model
Art means, and being practiced according to the content of specification, and in order to allow above and other purpose of the present utility model, feature
Can be become apparent with advantage, below especially exemplified by preferred embodiment, and coordinate accompanying drawing, described in detail as follows.
Embodiment one：
High frequency transformer as shown in Figure 1, including skeleton 110, armature winding 121, secondary windings 122 and magnetic core 130.Its
In, skeleton 110 includes hollow primary magnetic core receiving portion 111 and secondary magnetic core receiving portion 112, and magnetic core 130 includes primary magnetic core
131st, secondary magnetic core 132 and side portion 133, side portion 133 and primary magnetic core 131, the composition main magnetic circuit of secondary magnetic core 132.This reality
Apply in example, magnetic core 130 is the UU types combined magnet core (being UI types combined magnet core in another embodiment) of openning shape.Primary magnetic core 131
It is located in primary magnetic core receiving portion 111 and secondary magnetic core receiving portion 112 respectively with secondary magnetic core 132, primary magnetic core receiving portion 111
Primary coiling portion 113 and secondary coiling portion 114, armature winding 121 and secondary are respectively with the outer wall of secondary magnetic core receiving portion 112
Winding 122 is wound in primary coiling portion 113 and secondary coiling portion 114 respectively.The net sectional area Sa1 of primary magnetic core 131 is big
In the net sectional area Sb1 of side portion 133, likewise, the net sectional area (not shown) of secondary magnetic core 132 is also greater than side portion
133 net sectional area Sb1.Generally, primary magnetic core 131 is identical with the thickness of secondary magnetic core 132, as shown in Fig. 2 primary magnetic core
131 or secondary magnetic core 132 width A be more than B.
By making the net sectional area Sa1 of primary magnetic core 131 and secondary magnetic core 132 more than the effective cross-section of side portion 133
Product Sb1, makes main magnetic circuit form uneven magnetic circuit, can make the magnetic line of force more by air, so as to increase leakage inductance.It is humorous producing
Shake formula power supply when, without additionally setting independent inductance, reduce production process and wiring complexity.
Preferably, the ratio between the net sectional area Sa1 of primary magnetic core 131 and net sectional area Sb1 of side portion 133 is 1.1-
2.0, the ratio between the net sectional area of secondary magnetic core 132 and the net sectional area Sb1 of side portion 133 are 1.1-2.0.Specific ratio can
Specifically changed according to design parameter.
Further, skeleton 110 is horizontal-type skeleton or vertical-type skeleton, and skeleton 110 also includes pin 115, the He of armature winding 121
Secondary windings 122 includes exit (not shown), and exit is connected with pin 115.
Embodiment two
As shown in figure 3, magnetic core 20 includes main magnetic core 21 and additional magnetic core 22, main magnetic core 21 includes primary section 211 and secondary
Portion 212, additional magnetic core 22 includes the first additional magnetic core 221 and the second additional magnetic core 222.Primary magnetic core 231 includes main magnetic core 21
The additional magnetic core 221 of primary section 211 and first, the additional magnetic core of secondary section 212 and second of secondary magnetic core 232 including main magnetic core 21
222, the first additional magnetic core 221 and the second additional magnetic core 222 are fitted with primary section 211 and secondary section 212 respectively, the first additional magnetic
Core 221 is at least partially disposed in primary magnetic core receiving portion (not shown), and the second additional magnetic core 222 is at least partially disposed at secondary magnetic core
In receiving portion (not shown).
Primary magnetic core 231 and secondary magnetic core 232 are arranged in armature winding 201 and secondary windings 202 respectively.Magnetic core 20 is used
Main magnetic core 21 and the separate structure of additional magnetic core 22, are easy to be realized using the magnetic core of existing mass production of the present utility model
(i.e., more than the net sectional area of side portion, the net sectional area of secondary magnetic core is more than side for the net sectional area of primary magnetic core for effect
The net sectional area of edge).
In the present embodiment, main magnetic core 21 is the UU types combined magnet core of openning shape (for UI types combine magnetic in another embodiment
Core), UU types combined magnet core (or UI types combined magnet core) includes two side arms and two side columns 215, and two side arms are respectively as first
Level portion 211 and secondary section 212, side column 215 is used as side portion 233.First additional magnetic core 221 and the second additional magnetic core 222 are I
Type magnetic pole.
The net sectional area of the side arm of UU types combined magnet core (or UI types combined magnet core) and the net sectional area of I type magnetic poles it
With the i.e. net sectional area of primary magnetic core 231 or secondary magnetic core 232 is side column 215 more than the net sectional area of side portion 233
Net sectional area.Preferably, the ratio between net sectional area of the net sectional area of primary magnetic core 231 and side column 215 is 1.1-
2.0, the ratio between the net sectional area of secondary magnetic core 232 and the net sectional area of side column 215 are 1.1-2.0.
Preferably, main magnetic core 21 can be FERRITE CORE, permalloy magnetic core, non-crystaline amorphous metal magnetic core, ultramicro-crystal alloy
Magnetic core, magnetic powder core, sendust core or iron silicon magnetic core；Additional magnetic core 22 can be FERRITE CORE, permalloy magnetic core, non-
Peritectic alloy magnetic core, ultramicro-crystal alloy magnetic core, magnetic powder core, sendust core or iron silicon magnetic core.
When further, from the material of main magnetic core 21 and additional magnetic core 22, the relative permeability of main magnetic core 21 can be made big
In the relative permeability of additional magnetic core 22, the magnetic line of force preferentially walks the larger magnetic circuit of relative permeability, it is ensured that during normal work
Power supply conversion efficiency.
Embodiment three
High frequency transformer as shown in Figure 4, magnetic core 30 includes main magnetic core 31 and additional magnetic core 32, and main magnetic core 31 is EE type groups
Magnetic core (being in another embodiment EI types combined magnet core) is closed, EE types combined magnet core (or EI types combined magnet core) includes a center pillar
310th, two side arms 315 and two side columns 316, center pillar 310 include primary section 311 and secondary section 312.Additional magnetic core 32 includes the
One additional magnetic core 321 and the second additional magnetic core 322.In the present embodiment, the first additional magnetic core 321 and the second additional magnetic core 322
L-type magnetic pole (being in another embodiment I types magnetic pole) is, during the first additional magnetic core 321 and the second additional magnetic core 322 are fitted in
The two sides of post 310.Certainly, center pillar 310 can also only in side laminating the first additional magnetic core 321 and the second additional magnetic core 322.
Center pillar 310 is respectively primary magnetic core 331 and secondary magnetic core 332 with the two ends of the assembly of L-type magnetic pole；Primary magnetic core 331 has
Effect sectional area is more than two side arms more than two net sectional area sums of side arm 315, the net sectional area of secondary magnetic core 332
315 net sectional area sum.
Further, the middle part of at least one in two side arms 315 is provided with air gap 340, and air gap 340 can further increase
Leakage inductance.
Example IV
High frequency transformer as shown in Figure 5, magnetic core 40 includes main magnetic core 41 and additional magnetic core 42, and main magnetic core 41 is EI type groups
Magnetic core (being in another embodiment EE types combined magnet core) is closed, EI types combined magnet core (or EE types combined magnet core) includes a center pillar
415th, two side arms and two side columns 416, two side arms are respectively as primary section 411 and secondary section 412, the first additional magnetic core
421 and second additional magnetic core 422 be a two arms for U-shaped magnetic pole 420, the first additional magnetic core 421 is fitted work with primary section 411
It is primary magnetic core 431, the second additional magnetic core 422 is fitted as secondary magnetic core 432 with secondary section 412.Primary magnetic core 431 it is effective
, more than the net sectional area of the side column 416 of the open side of U-shaped magnetic pole 420, the net sectional area of secondary magnetic core 432 is more than U for sectional area
The net sectional area of the side column 416 of the open side of type magnetic pole 421.
Further, center pillar 415 is provided with air gap 440, and air gap 440 can further increase leakage inductance.
For a person skilled in the art, technical scheme that can be as described above and design, make other each
Plant corresponding change and deform, and all these changes and deforms the guarantor that should all belong to the utility model claim
Within the scope of shield.
Claims (10)
1. a kind of high frequency transformer, including skeleton, armature winding, secondary windings and magnetic core, the skeleton include hollow primary
Magnetic core receiving portion and secondary magnetic core receiving portion, the magnetic core include primary magnetic core, secondary magnetic core and side portion, the side portion with
The primary magnetic core, secondary magnetic core composition main magnetic circuit, the primary magnetic core and secondary magnetic core are held positioned at the primary magnetic core respectively
Receive in portion and secondary magnetic core receiving portion, the outer wall of the primary magnetic core receiving portion and secondary magnetic core receiving portion is respectively primary coiling
Portion and secondary coiling portion, the armature winding and secondary windings are wound in the primary coiling portion and secondary coiling portion respectively；
It is characterized in that：
The net sectional area of the primary magnetic core is more than the net sectional area of the side portion, the effective cross-section of the secondary magnetic core
Net sectional area of the product more than the side portion.
2. high frequency transformer as claimed in claim 1, it is characterised in that：The primary section of the primary magnetic core including main magnetic core and
First additional magnetic core, the secondary section and the second additional magnetic core of the secondary magnetic core including main magnetic core, the first additional magnetic core and
Second additional magnetic core is fitted with the primary section and secondary section respectively, and the first additional magnetic core is at least partially disposed at the primary
In magnetic core receiving portion, the second additional magnetic core is at least partially disposed at the secondary magnetic core receiving portion.
3. high frequency transformer as claimed in claim 2, it is characterised in that：The main magnetic core is FERRITE CORE, permalloy
Magnetic core, non-crystaline amorphous metal magnetic core, ultramicro-crystal alloy magnetic core, magnetic powder core, sendust core or iron silicon magnetic core；The additional magnetic core is
FERRITE CORE, permalloy magnetic core, non-crystaline amorphous metal magnetic core, ultramicro-crystal alloy magnetic core, magnetic powder core, sendust core or iron silicon
Magnetic core.
4. high frequency transformer as claimed in claim 2 or claim 3, it is characterised in that：The main magnetic core is combined for the UU types of openning shape
Magnetic core or UI type combined magnet cores, the UU types combined magnet core or UI types combined magnet core include two side arms and two side columns, described
Two side arms respectively as the primary section and secondary section, the side column as the side portion, the first additional magnetic core and
Second additional magnetic core is I type magnetic poles.
5. high frequency transformer as claimed in claim 4, it is characterised in that：The net sectional area of the primary magnetic core and the side
The ratio between net sectional area of post is 1.1-2.0, the net sectional area of the net sectional area of the secondary magnetic core and the side column it
Than being 1.1-2.0.
6. high frequency transformer as claimed in claim 2 or claim 3, it is characterised in that：The main magnetic core is EE types combined magnet core or EI
Type combined magnet core, the EE types combined magnet core or EI types combined magnet core include center pillar, two side arms and two side columns, described
Center pillar includes the primary section and secondary section, and the first additional magnetic core and the second additional magnetic core are L-type magnetic pole or I type magnetic
Post, the first additional magnetic core and the second additional magnetic core are fitted in the side of the center pillar；The effective cross-section of the primary magnetic core
, more than the net sectional area sum of two side arms, the net sectional area of the secondary magnetic core is more than two side arms for product
Net sectional area sum.
7. high frequency transformer as claimed in claim 6, it is characterised in that：At least one middle part in two side arms sets
There is air gap.
8. high frequency transformer as claimed in claim 2 or claim 3, it is characterised in that：The main magnetic core is EE types combined magnet core or EI
Type combined magnet core, the EE types combined magnet core or EI types combined magnet core include center pillar, two side arms and two side columns, described
Respectively as the primary section and secondary section, the first additional magnetic core and the second additional magnetic core are a U-shaped magnetic to two side arms
Two additional arms of post, the first additional magnetic core is fitted with the primary section, the second additional magnetic core and the secondary section
Laminating.
9. high frequency transformer as claimed in claim 8, it is characterised in that：The center pillar is provided with air gap.
10. high frequency transformer as claimed in claim 2 or claim 3, it is characterised in that：The skeleton is horizontal-type skeleton or vertical bone
Frame, the skeleton also includes pin, and the armature winding and secondary windings include exit, and the exit connects with the pin
Connect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621217194.1U CN206236521U (en) | 2016-11-11 | 2016-11-11 | High frequency transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621217194.1U CN206236521U (en) | 2016-11-11 | 2016-11-11 | High frequency transformer |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206236521U true CN206236521U (en) | 2017-06-09 |
Family
ID=58991051
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621217194.1U Withdrawn - After Issue CN206236521U (en) | 2016-11-11 | 2016-11-11 | High frequency transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206236521U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106373734A (en) * | 2016-11-11 | 2017-02-01 | 深圳市莱福德光电有限公司 | High -frequency transformer |
-
2016
- 2016-11-11 CN CN201621217194.1U patent/CN206236521U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106373734A (en) * | 2016-11-11 | 2017-02-01 | 深圳市莱福德光电有限公司 | High -frequency transformer |
| CN106373734B (en) * | 2016-11-11 | 2018-05-08 | 深圳莱福德科技股份有限公司 | High frequency transformer |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 518000 Guangdong province Shenzhen city Baoan District street Xixiang Development Zone guwu Indus Taihua Industrial Park building 14A building 4-5 Patentee after: Polytron Technologies Inc, Shenzhen Address before: 518000 Guangdong province Shenzhen city Baoan District street Xixiang Development Zone guwu Indus Taihua Industrial Park building 14A building 4-5 Patentee before: Shenzhen Ledfriend Optoelectronics Co., Ltd. |
|
| AV01 | Patent right actively abandoned | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20170609 Effective date of abandoning: 20180508 |