CN106373734B - High frequency transformer - Google Patents
High frequency transformer Download PDFInfo
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- CN106373734B CN106373734B CN201610994480.7A CN201610994480A CN106373734B CN 106373734 B CN106373734 B CN 106373734B CN 201610994480 A CN201610994480 A CN 201610994480A CN 106373734 B CN106373734 B CN 106373734B
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- magnetic core
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- sectional area
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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
-
- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
- H01F3/14—Constrictions; Gaps, e.g. air-gaps
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Multimedia (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
The invention 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 forms 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, and the net sectional area of the secondary magnetic core is more than the net sectional area of the side portion.Uneven magnetic circuit is formed, the magnetic line of force can be made more by air, so as to increase leakage inductance.When producing resonant mode power supply, without additionally setting independent inductance, production process and wiring complexity are reduced.
Description
Technical field
The present invention relates to field transformer, 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.
Common design method has two kinds：
1. using traditional transformer and independent resonant inductance, it 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 is big, of high cost.
2. simply resonant inductance is integrated in transformer, the leakage inductance by increasing transformer does resonant inductance use.
Usually reach the requirement of resonant inductance by varying the distance between primary and secondary winding to change the leakage inductance of transformer.Need compared with
Big leakage inductance, it is necessary to increase the distance between primary and secondary winding, volume of transformer increasing, magnetic coupling energy force difference, transformation can be caused
Transmission efficiency is low for device, and certain condition limitation under, its leakage inductance can increased scope it is extremely limited.
The content of the invention
For overcome the deficiencies in the prior art, it is an object of the invention to provide a kind of height of combination resonant inductance (leakage inductance)
Frequency power transformer, it, which can solve existing resonant mode power supply, needs to add separate inductor, and design is complicated, bulky problem.Also can solve
It is certainly existing limited by increasing the increase of the distance between primary and secondary winding leakage inductance effect, it is difficult to meet the problem of application is required.
The purpose of the present invention 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, which includes the primary section of main magnetic core and the first additional magnetic core, the secondary magnetic core, includes
The secondary section of main magnetic core and the second additional magnetic core, the described first additional magnetic core and the second additional magnetic core respectively with the primary section and
Secondary section is bonded, and the described first additional magnetic core is at least partially disposed in the primary magnetic core receiving portion, the described 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, easy to using now
The magnetic core of some mass productions realizes the effect of the present invention.
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 close
Golden magnetic core, ultramicro-crystal alloy magnetic core, magnetic powder core, sendust core or iron silicon magnetic core.
Preferably, the relative permeability of the main magnetic core is more than the relative permeability of the additional magnetic core.The magnetic line of force is preferential
The larger magnetic circuit of relative permeability is walked, ensures power supply conversion efficiency during normal work.
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, for the side column as the side portion, the described first additional magnetic core and the second additional magnetic core are I type magnetic poles.
Preferably, the ratio between net sectional area of the net sectional area of the primary magnetic core and the side column is 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 the 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 a center pillar, two side arms and two side columns, and the center pillar includes the primary section and secondary section, and described
One additional magnetic core and the second additional magnetic core are L-type magnetic pole or I type magnetic poles, and the described first additional magnetic core and the second additional magnetic core paste
Close in the side of the center pillar；The net sectional area of the primary magnetic core is more than the sum of net sectional area of two side arms,
The net sectional area of the secondary magnetic core is more than the sum of net sectional area of two side arms.
Preferably, at least one middle part in two side arms is equipped 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 a center pillar, two side arms and two side columns, and two side arms are respectively as the primary section and secondary
Portion, the described first additional magnetic core and the second additional magnetic core for a U-shaped magnetic pole two additional arms, the described first additional magnetic core with
The primary section fitting, the described second additional magnetic core are bonded with the secondary section.
Preferably, the center pillar is equipped with air gap.Leakage inductance can further be increased.
Compared with prior art, the beneficial effects of the present invention are：By the effective cross-section for making primary magnetic core and secondary magnetic core
Product forms uneven magnetic circuit, can make the magnetic line of force more by air, so as to increase leakage more than the net sectional area of side portion
Sense.When producing resonant mode power supply, without additionally setting independent inductance, production process and wiring complexity are reduced.
Brief description of the drawings
Fig. 1 is the decomposition diagram for the high frequency transformer that the embodiment of the present invention one provides.
Fig. 2 is the structure diagram of magnetic core in Fig. 1.
Fig. 3 is the structure diagram of the magnetic core of high frequency transformer provided by Embodiment 2 of the present invention.
Fig. 4 is the structure diagram of the magnetic core for the high frequency transformer that the embodiment of the present invention three provides.
Fig. 5 is the structure diagram of the magnetic core for the high frequency transformer that the embodiment of the present invention four provides.
Embodiment
Described above is only the general introduction of technical solution of the present invention, in order to better understand the technological means of the present invention,
And can be practiced according to the content of specification, and in order to allow the above and other objects, features and advantages of the present invention can
Become apparent, below especially exemplified by preferred embodiment, and coordinate attached drawing, describe 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 form main magnetic circuit with primary magnetic core 131, 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 at respectively in primary magnetic core receiving portion 111 and secondary magnetic core receiving portion 112 with secondary magnetic core 132, primary magnetic core receiving portion 111
With the respectively primary coiling portion 113 of outer wall of secondary magnetic core receiving portion 112 and secondary coiling portion 114, armature winding 121 and secondary
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.In general, primary magnetic core 131 is identical with 132 thickness of secondary magnetic core, as shown in Fig. 2, primary magnetic core
The 131 or width A of secondary magnetic core 132 is more than B.
By making the net sectional area Sa1 of primary magnetic core 131 and secondary magnetic core 132 be 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 further includes pin 115,121 He of armature winding
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, adding magnetic core 22 includes the first additional additional magnetic core 222 of magnetic core 221 and second.Primary magnetic core 231 includes main magnetic core 21
Primary section 211 and first add magnetic core 221, the secondary section 212 and second of secondary magnetic core 232 including main magnetic core 21 adds magnetic core
222, the first additional magnetic core 221 and second adds magnetic core 222 and is bonded respectively with primary section 211 and secondary section 212, 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 uses
22 separate structure of main magnetic core 21 and additional magnetic core, easy to realize the effect of the present invention using the magnetic core of existing mass production
(i.e. the net sectional area of primary magnetic core is more than the net sectional area of side portion, and the net sectional area of secondary magnetic core is more than side portion
Net sectional area).
In the present embodiment, main magnetic core 21 is that the UU types combined magnet core of openning shape (is UI types combination 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 are used as side portion 233.It is I that first additional magnetic core 221 and second, which adds magnetic core 222,
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, more than net sectional area, that is, side column 215 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.
Further, when selecting 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 include 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 second adds magnetic core 322.In the present embodiment, the first additional magnetic core 321 and second adds magnetic core 322
It is L-type magnetic pole (being in another embodiment I types magnetic pole), during the first additional additional magnetic core 322 of magnetic core 321 and second is fitted in
The two sides of column 310.Certainly, center pillar 310 only can also add magnetic core 322 in the first additional magnetic core 321 and second of side fitting.
Center pillar 310 and the both ends of the assembly of L-type magnetic pole are respectively primary magnetic core 331 and secondary magnetic core 332；Primary magnetic core 331 has
Imitate sectional area and be more than the sum of net sectional area of two side arms 315, the net sectional area of secondary magnetic core 332 is more than two side arms
The sum of 315 net sectional area.
Further, at least one middle part in two side arms 315 is equipped 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 include 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 add two arms of the magnetic core 422 for a U-shaped magnetic pole 420, and the first additional magnetic core 421 is bonded work with primary section 411
For primary magnetic core 431, the second additional magnetic core 422 is bonded with secondary section 412 is used as secondary magnetic core 432.Primary magnetic core 431 it is effective
Sectional area is more than the net sectional area of the side column 416 of U-shaped 420 open side of magnetic pole, and the net sectional area of secondary magnetic core 432 is more than U
The net sectional area of the side column 416 of 421 open side of type magnetic pole.
Further, center pillar 415 is equipped with air gap 440, and air gap 440 can further increase leakage inductance.
For those skilled in the art, technical solution that can be as described above and design, make other each
Kind is corresponding to be changed and deforms, and all these change and deform the protection model that should all belong to the claims in the present invention
Within enclosing.
Claims (9)
1. a kind of high frequency transformer, including skeleton, armature winding, secondary windings and magnetic core, the skeleton includes 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；
The primary magnetic core, which includes the primary section of main magnetic core and the first additional magnetic core, the secondary magnetic core, includes the secondary of main magnetic core
Portion and the second additional magnetic core, the described first additional magnetic core and the second additional magnetic core are bonded with the primary section and secondary section respectively,
Described first additional magnetic core is at least partially disposed in the primary magnetic core receiving portion, and the described second additional magnetic core is at least partially disposed at
The secondary magnetic core receiving portion.
2. high frequency transformer as claimed in claim 1, 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.
3. high frequency transformer as claimed in claim 1, it is characterised in that：The relative permeability of the main magnetic core is more than described attached
Add the relative permeability of magnetic core.
4. such as the high frequency transformer any one of claim 1-3, it is characterised in that：The main magnetic core is the UU of openning shape
Type combined magnet core or UI type combined magnet cores, UU types combined magnet core or UI the types combined magnet core include two side arms and two sides
Column, two side arms are additional as the side portion, described first respectively as the primary section and secondary section, the side column
Magnetic core and the second additional magnetic core are 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 column 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 for 1.1-2.0.
6. such as the high frequency transformer any one of claim 1-3, it is characterised in that：The main magnetic core combines magnetic for EE types
Core or EI type combined magnet cores, EE types combined magnet core or EI the types combined magnet core include a center pillar, two side arms and two sides
Column, the center pillar include the primary section and secondary section, the described first additional magnetic core and the second additional magnetic core be L-type magnetic pole or
I type magnetic poles, the described first additional magnetic core and the second additional magnetic core are fitted in the side of the center pillar；The primary magnetic core it is effective
Sectional area is more than the sum of net sectional area of two side arms, and the net sectional area of the secondary magnetic core is more than two sides
The sum of net sectional area of arm.
7. high frequency transformer as claimed in claim 6, it is characterised in that：At least one middle part in two side arms is set
There is air gap.
8. such as the high frequency transformer any one of claim 1-3, it is characterised in that：The main magnetic core combines magnetic for EE types
Core or EI type combined magnet cores, EE types combined magnet core or EI the types combined magnet core include a center pillar, two side arms and two sides
Column, for two side arms respectively as the primary section and secondary section, the described first additional magnetic core and the second additional magnetic core are one
Two additional arms of a U-shaped magnetic pole, the described first additional magnetic core are bonded with the primary section, described second add magnetic core with it is described
Secondary section is bonded.
9. high frequency transformer as claimed in claim 8, it is characterised in that：The center pillar is equipped with air gap.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610994480.7A CN106373734B (en) | 2016-11-11 | 2016-11-11 | High frequency transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610994480.7A CN106373734B (en) | 2016-11-11 | 2016-11-11 | High frequency transformer |
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| Publication Number | Publication Date |
|---|---|
| CN106373734A CN106373734A (en) | 2017-02-01 |
| CN106373734B true CN106373734B (en) | 2018-05-08 |
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| CN201610994480.7A Active CN106373734B (en) | 2016-11-11 | 2016-11-11 | High frequency transformer |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107218523A (en) * | 2017-06-19 | 2017-09-29 | 美照（上海）节能科技有限公司 | A kind of AC coupled is powered LED lamp |
| CN109273219B (en) * | 2018-09-28 | 2021-05-11 | 湖南天跃电气有限公司 | Transformer with short-circuit-proof turn sleeve |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2646841Y (en) * | 2003-08-26 | 2004-10-06 | 台北沛波电子股份有限公司 | High voltage transformer device |
| CN2805041Y (en) * | 2005-04-08 | 2006-08-09 | 达方电子股份有限公司 | Transformer, and circuit for driving discharge lamp tube therewith |
| CN206236521U (en) * | 2016-11-11 | 2017-06-09 | 深圳市莱福德光电有限公司 | High frequency transformer |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2130731Y (en) * | 1992-07-06 | 1993-04-28 | 杨恩久 | Controllable device for fixing brake-shoe |
| JP6124110B2 (en) * | 2012-10-10 | 2017-05-10 | 日立金属株式会社 | Composite reactor for multi-phase converter and multi-phase converter using the same |
-
2016
- 2016-11-11 CN CN201610994480.7A patent/CN106373734B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2646841Y (en) * | 2003-08-26 | 2004-10-06 | 台北沛波电子股份有限公司 | High voltage transformer device |
| CN2805041Y (en) * | 2005-04-08 | 2006-08-09 | 达方电子股份有限公司 | Transformer, and circuit for driving discharge lamp tube therewith |
| CN206236521U (en) * | 2016-11-11 | 2017-06-09 | 深圳市莱福德光电有限公司 | High frequency transformer |
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| CN106373734A (en) | 2017-02-01 |
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