CN206619484U - The resonance circuit of transformer and application transformer - Google Patents

Abstract

The utility model provides the resonance circuit of a kind of transformer and application transformer, and transformer includes：Magnetic core, bobbin winder bracket and primary side winding and vice-side winding, at least one of primary side winding and vice-side winding are made up of litz wire, bobbin winder bracket at least includes one first winding space and one second winding space, primary side winding is set around the first winding space, vice-side winding is set around the second winding space, primary side winding separates along same axis with vice-side winding and is enclosed with most two layers dielectric film on the outside of coiling, litz wire.Transformer and the resonance circuit of application transformer that the utility model is provided, by being enclosed with most two layers dielectric film on the outside of litz wire, improve the anti-pressure ability of litz wire, so as to efficiently solve the current unevenness brought present in prior art when magnetic flux passes perpendicularly through the litz wire being crushed, AC resistance is caused to rise, the problem of loss increases.

Description

The resonance circuit of transformer and application transformer

Technical field

The utility model is related to transformer technology field, more particularly to a kind of transformer and the resonance electricity using transformer Road.

Background technology

In high-frequency power transformer, in order to reduce eddy-current loss, winding frequently with multiply and around thin wire it is stranded and Into the heavy gauge wire of substitution sub-thread, the stranded wire also known as litz wire.When carrying out the coiling of litz wire, general feelings Under condition, the section of the litz wire after coiling is rounded, and when magnetic flux passes through litz wire, electric current still may be used between per share wire It is uniformly distributed, as shown in figure 1, wherein dotted line only represents the profile in section.However, in the actual processing procedure of transformer, litz wire meeting Because stress is crushed, it is particularly applied in LLC resonance circuits, when transformer is using slot structure is divided, as shown in Fig. 2 working as magnetic flux The litz wire being crushed is passed perpendicularly through, the current unevenness of multi cord can be caused, cause AC resistance to rise, loss increase.

Utility model content

The utility model provides the resonance circuit of a kind of transformer and application transformer, for solving to exist in the prior art When magnetic flux passes perpendicularly through the litz wire being crushed so that the current unevenness of multi cord, cause AC resistance to rise, loss increase Plus the problem of.

One side of the present utility model provides a kind of transformer, including：Magnetic core, bobbin winder bracket and primary side winding and secondary Winding, at least one of the primary side winding and vice-side winding are made up of litz wire, the bobbin winder bracket at least include one first around Space of lines and one second winding space, the primary side winding are set around first winding space, and the vice-side winding is set around Second winding space, the primary side winding is separated on the outside of coiling, the litz wire with the vice-side winding along same axis It is enclosed with most two layers dielectric film.

Transformer as described above, the transformer is original-auxiliary structure, and it is empty that the bobbin winder bracket also includes one first interval Between, first winding space, first clearance space and second winding space are arranged in order along the axis.

Transformer as described above, the transformer is original-pair-original structure, and the original-pair-original structure includes：First is former Side winding, vice-side winding and the second primary side winding, the bobbin winder bracket include be arranged in order setting the first winding space, second around Space of lines and the 3rd winding space, first primary side winding are set around first winding space, and the vice-side winding is set around Second winding space, second primary side winding is set around the 3rd winding space.

Transformer as described above, the bobbin winder bracket also includes：First clearance space and the second clearance space, described first Winding space, the first clearance space, the second winding space, the second clearance space, the 3rd winding space are arranged successively along the axis Row are set.

Transformer as described above, the transformer is pair-original-auxiliary structure, and the pair-original-auxiliary structure includes：First is secondary Side winding, primary side winding and the second vice-side winding, the bobbin winder bracket include be arranged in order setting the second winding space, first around Space of lines and the 3rd winding space, first vice-side winding are set around second winding space, and the primary side winding is set around First winding space, second vice-side winding is set around the 3rd winding space.

Transformer as described above, the bobbin winder bracket also includes：First clearance space and the second clearance space, described second Winding space, the first clearance space, the first winding space, the second clearance space, the 3rd winding space are arranged successively along the axis Row are set.

Transformer as described above, the litz wire includes rope-lay strand, and the diameter of the twisted wire is less than or equal to 0.1mm。

Transformer as described above, the dielectric film is made up of polyimides adhesive plaster or polyester fiber adhesive plaster.

Transformer as described above, the Applicable temperature of the dielectric film meets in the UL certifications of American insurance business experiment institute 130 degree and its temperature grade of the above.

Another aspect of the present utility model provides a kind of resonance circuit of application transformer, including above-mentioned transformer.

Resonance circuit as described above, the resonance circuit also includes：Resonant capacitance, wherein, the resonant capacitance and institute The primary side winding stated in transformer is connected in series.

Resonance circuit as described above, the resonance circuit also includes：Resonant capacitance, wherein, the resonant capacitance and institute The vice-side winding stated in transformer is connected in series.

Resonance circuit as described above, the resonance circuit is LLC circuits.

Transformer and the resonance circuit of application transformer that the utility model is provided, by being set to bobbin winder bracket at least to wrap Include the first winding space and the second winding space for housing primary side winding and vice-side winding, and primary side winding and vice-side winding At least one of be made up of litz wire, further will be enclosed with most two layers dielectric film on the outside of litz wire, by setting at most Two layers of dielectric film, improves the anti-pressure ability of litz wire, so as to efficiently solve present in prior art when magnetic flux is vertical During through the litz wire being crushed so that the current unevenness of multi cord, AC resistance is caused to rise, the problem of loss increases protects Having demonstrate,proved litz wire will not be crushed deformation in coiling, maintain good anti-vortex ability, improve what the transformer was used Reliability, is conducive to the popularization and application in market.

Brief description of the drawings

Fig. 1 passes through the structural representation of normal litz wire for the magnetic flux that the utility model embodiment is provided；

Fig. 2 passes through the structural representation for the litz wire that is crushed for the magnetic flux that the utility model embodiment is provided；

A kind of structural representation one for transformer that Fig. 3 provides for the utility model embodiment；

A kind of schematic cross-section for transformer that Fig. 4 provides for the utility model embodiment；

The structural representation that Fig. 5 is connected for the litz wire that the utility model embodiment is provided with dielectric film；

A kind of structural representation two for transformer that Fig. 6 provides for the utility model embodiment；

The structural representation of the resonance circuit for the application transformer that Fig. 7 provides for the utility model embodiment.

In figure,

1st, bobbin winder bracket；101st, the first winding space；

102nd, the second winding space；103rd, the first clearance space；

104th, the 3rd winding space；105th, the second clearance space；

2nd, primary side winding；201st, the first primary side winding；

202nd, the second primary side winding；3rd, vice-side winding；

4th, axis；5th, litz wire；

501st, twisted wire；6th, dielectric film；

7th, resonant capacitance；8th, transformer；

9th, magnetic core.

Embodiment

With reference to the accompanying drawings and examples, embodiment of the present utility model is described in further detail.Below Example is used to illustrate the utility model, but is not limited to scope of the present utility model.

In the utility model, the term such as term " connection " is broadly understood, and is connected for example, " connection " can be physics Connect or be electrically connected.For the ordinary skill in the art, above-mentioned term can be understood as the case may be Concrete meaning in the utility model.

In addition, term " first ", " second " are only used for describing purpose, and it is not intended that indicating or implying relative importance Or the implicit quantity for indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or Implicitly include one or more this feature.In description of the present utility model, " multiple " are meant that at least two, example Such as two, three etc., unless otherwise specifically defined.

A kind of structural representation one for transformer that Fig. 3 provides for the utility model embodiment；Fig. 4 is that the utility model is real A kind of schematic cross-section of transformer of example offer is provided；Litz wire 5 and dielectric film 6 that Fig. 5 provides for the utility model embodiment The structural representation of connection；Refer to the attached drawing 3-5 is understood, present embodiments provides a kind of transformer, the transformer includes：Magnetic core 9, Bobbin winder bracket 1 and primary side winding 2 and vice-side winding 3, at least one of primary side winding 2 and vice-side winding 3 are made up of litz wire 5, Bobbin winder bracket 1 at least includes one first winding space 101 and one second winding space 102, and it is empty that primary side winding 2 is set around the first coiling Between 101, vice-side winding 3 is set around the second winding space 102, and primary side winding 2 separates coiling with vice-side winding 3 along same axis 4, The outside of litz wire 5 is enclosed with most two layers dielectric film 6.

Wherein, the present embodiment is not limited for the particular location of the first winding space 101 and the second winding space 102, For example, interval can will be provided between the first winding space 101 and the second winding space 102, so that the change formed Depressor is a point slot structure, advantageously ensures that reliability that transformer uses and the size for controlling leakage inductance；In addition, primary side winding 2 or the quantity of vice-side winding 3 can be with more than one, for example, primary side winding 2 includes two or three primary side windings 2, can be by Bobbin winder bracket 1 is set to also include：3rd winding space 104, the 4th winding space etc..

The specific number of plies for dielectric film 6 can not be limited in addition, and those skilled in the art can be according to specific design Demand is configured, for example, the outside of litz wire 5 can be set to include two layers dielectric film 6, one layer of dielectric film 6, but It is, it should be noted that when the number of plies of dielectric film 6 in the outside of litz wire 5 parcel sets more, wire filling rate is lower, leads Line filling rate is the ratio of winding space inner wire sectional area and magnetic core window area.Therefore, it is configured to dielectric film 6 When, it is at most two layers that the number of plies of dielectric film 6, which is set, can not only so ensure the anti-pressure ability of litz wire 5, while can also Ensure there is higher wire filling rate in winding space.In addition, the winding loss in order to reduce the litz wire 5, single cord 501 Diameter dimension be set smaller than or equal to 0.1mm.

It should be noted that the axis 4 in the present embodiment is virtually set, those skilled in the art can be according to specific Design requirement the particular location of axis 4 is set, it is more preferred, the axis 4 can be arranged through to above-mentioned bobbin winder bracket 1 The horizontal axis 4 at center.

Understood with continued reference to accompanying drawing 3-5, the transformer of the present embodiment is to include on original-auxiliary structure, i.e., transformer now One primary side winding 2 and a vice-side winding 3, bobbin winder bracket 1 include the first winding space 101, the first clearance space 103 and the second coiling Space 102, and three is arranged in order along axis 4.

A kind of structural representation two for transformer that Fig. 6 provides for the utility model embodiment, the transformer of the present embodiment Original-pair-original structure is set to, the original-pair-original structure includes：First primary side winding 201, the primary side winding of vice-side winding 3 and second 202, and first primary side winding 201, the primary side winding 202 of vice-side winding 3 and second set gradually along same axis 4, At this point it is possible to which bobbin winder bracket 1 is set to include the first winding space 101 for being arranged in order setting, the second winding space 102 and Three winding spaces 104, the first primary side winding 201 is set around first winding space 101, vice-side winding 3 be set around this second around Space of lines 102, the second primary side winding 202 is set around the 3rd winding space 104.

In order to be further ensured that the normal circulation of magnetic flux, bobbin winder bracket 1 can also be set to also include：First clearance space 103 and second clearance space 105, the first winding space 101, the first clearance space 103, the second winding space 102, second interval Space 105, the 3rd winding space 104 are arranged in order setting along axis 4.

In another embodiment of the utility model, transformer may also be configured to pair-original-auxiliary structure, the pair-original-auxiliary structure Including：First vice-side winding, primary side winding and the second vice-side winding, and first vice-side winding, primary side winding and second are secondary Side winding is set gradually along same axis, at this point it is possible to by bobbin winder bracket be set to include be arranged in order setting second around Space of lines, the first winding space and the 3rd winding space, the first vice-side winding are set around second winding space, primary side winding around Located at first winding space, the second vice-side winding is set around the 3rd winding space.

In order to be further ensured that the normal circulation of magnetic flux, bobbin winder bracket can also be set to also include：First clearance space With the second clearance space, the second winding space, the first clearance space, the first winding space, the second clearance space, the 3rd coiling are empty Between be arranged in order setting along axis.

In specific design, the anti-pressure ability of litz wire 5 is effectively improved by the dielectric film 6 of setting, therefore, in order to Ensure the stability in use of dielectric film 6, dielectric film 6 can be set to by polyimides (Polyimide) adhesive plaster or polyester Fiber (Polyester) adhesive plaster is constituted；Also, the Applicable temperature of the dielectric film 6 meets in the UL certifications of American insurance business experiment institute 130 degree and its above temperature grade；So as to further increase the security reliability that the transformer is used, be conducive to market Popularization and application.

The structural representation of the resonance circuit for the application transformer that Fig. 7 provides for the utility model embodiment, refer to the attached drawing 7 Understand, the another aspect of the present embodiment provides a kind of resonance circuit of application transformer, and the circuit includes above-mentioned any change Depressor 8.

Above-mentioned any transformer 8 by setting in a resonant circuit, specifically, the transformer 8 is by the way that bobbin winder bracket 1 is set The first winding space 101 and the second winding space 102 at least including being used to house primary side winding 2 and vice-side winding 3 are set to, and At least one of primary side winding 2 and vice-side winding 3 are made up of litz wire 5, are further enclosed with the outside of litz wire 5 at most two layers Dielectric film 6, by most two layers dielectric film 6 of setting, improves the anti-pressure ability of litz wire 5, so as to efficiently solve existing Present in technology when magnetic flux passes perpendicularly through the litz wire 5 being crushed so that the current unevenness of multi cord, cause AC resistance Rise, the problem of loss increase, it is ensured that litz wire 5 will not be crushed deformation in coiling so that litz wire 5 is maintained well Anti- vortex ability, improve the reliability that the resonance circuit is used, be conducive to the popularization and application in market.

On the basis of above-described embodiment, understand that resonance circuit can also be set to by the present embodiment with continued reference to accompanying drawing 7 It is LLC circuits, the specific LLC circuits also include：Resonant capacitance 7, wherein, resonant capacitance 7 and the primary side winding 2 in transformer It is connected in series.

It should be noted that above-mentioned resonant capacitance 7 is identical with the functional effect of resonant capacitance 7 of the prior art, and one As in the case of, a leakage inductance Lr can be integrated with above-mentioned any transformer 8, therefore, leakage inductance Lr belongs to transformer 8, in equivalent circuit, leakage inductance Lr is connected in series equivalent to resonant capacitance 7, it is achieved thereby that resonant capacitance 7 passes through leakage The structure that magnetoelectricity sense Lr is connected in series with Transformer Winding 2.In another embodiment, the pair that resonant capacitance 7 can also be with transformer Side winding 3 is connected in series.

Finally it should be noted that：Various embodiments above is only limited to illustrate the technical solution of the utility model, rather than to it System；Although the utility model is described in detail with reference to foregoing embodiments, one of ordinary skill in the art should Understand：It can still modify to the technical scheme described in foregoing embodiments, or to which part or whole Technical characteristic carries out equivalent substitution；And these modifications or replacement, the essence of appropriate technical solution is departed from this practicality newly The scope of each embodiment technical scheme of type.

Claims (13)

1. a kind of transformer, it is characterised in that including：Magnetic core, bobbin winder bracket and primary side winding and vice-side winding, the primary side around Group and at least one of vice-side winding are made up of litz wire, the bobbin winder bracket at least include one first winding space and one second around Space of lines, the primary side winding is set around first winding space, and the vice-side winding is set around second winding space, The primary side winding separates along same axis with the vice-side winding and is enclosed with most two layers insulation on the outside of coiling, the litz wire Film.

2. transformer according to claim 1, it is characterised in that the transformer is original-auxiliary structure, and the bobbin winder bracket is also Including one first clearance space, first winding space, first clearance space and second winding space are described in Axis is arranged in order.

3. transformer according to claim 1, it is characterised in that the transformer is original-pair-original structure, the original- Pair-original structure includes：First primary side winding, vice-side winding and the second primary side winding, the bobbin winder bracket include being arranged in order setting The first winding space, the second winding space and the 3rd winding space, it is empty that first primary side winding is set around first coiling Between, the vice-side winding is set around second winding space, and second primary side winding is set around the 3rd winding space.

4. transformer according to claim 3, it is characterised in that the bobbin winder bracket also includes：First clearance space and Two clearance spaces, first winding space, the first clearance space, the second winding space, the second clearance space, the 3rd coiling are empty Between be arranged in order setting along the axis.

5. transformer according to claim 1, it is characterised in that the transformer is pair-original-auxiliary structure, the pair- Original-auxiliary structure includes：First vice-side winding, primary side winding and the second vice-side winding, the bobbin winder bracket include being arranged in order setting The second winding space, the first winding space and the 3rd winding space, it is empty that first vice-side winding is set around second coiling Between, the primary side winding is set around first winding space, and second vice-side winding is set around the 3rd winding space.

6. transformer according to claim 5, it is characterised in that the bobbin winder bracket also includes：First clearance space and Two clearance spaces, second winding space, the first clearance space, the first winding space, the second clearance space, the 3rd coiling are empty Between be arranged in order setting along the axis.

7. transformer according to claim 1, it is characterised in that the litz wire includes rope-lay strand, the twisted wire Diameter is less than or equal to 0.1mm.

8. the transformer according to any one in claim 1-7, it is characterised in that the dielectric film is by polyimides glue Cloth or polyester fiber adhesive plaster are constituted.

9. the transformer according to any one in claim 1-7, it is characterised in that the Applicable temperature symbol of the dielectric film 130 degree and its temperature grade of the above in the UL certifications of conjunction American insurance business's experiment institute.

10. a kind of resonance circuit of application transformer, it is characterised in that including the change described in any one in claim 1-9 Depressor.

11. resonance circuit according to claim 10, it is characterised in that the resonance circuit also includes：Resonant capacitance, its In, the resonant capacitance is connected in series with the primary side winding in the transformer.

12. resonance circuit according to claim 10, it is characterised in that the resonance circuit also includes：Resonant capacitance, its In, the resonant capacitance is connected in series with the vice-side winding in the transformer.

13. the resonance circuit according to claim 11 or 12, it is characterised in that the resonance circuit is LLC circuits.