CN205595191U

CN205595191U - Integrated transformer of LLC and power supply

Info

Publication number: CN205595191U
Application number: CN201521133778.6U
Authority: CN
Inventors: 何北凯; 李锦乐
Original assignee: Shenzhen TCL New Technology Co Ltd
Current assignee: Shenzhen TCL New Technology Co Ltd
Priority date: 2015-12-30
Filing date: 2015-12-30
Publication date: 2016-09-21
Anticipated expiration: 2025-12-30

Abstract

The utility model discloses an integrated transformer of LLC and power supply, the integrated transformer of this LLC is including having the skeleton of spool and setting up the magnetic core subassembly on the skeleton, and the winding has a primary on the spool, is provided with the first insulation layer on the primary, the peripheral position that corresponds a primary on first insulation layer is provided with first barricade, and first barricade will be provided with the spool on a primary and first insulation layer to be separated for first wire winding portion and second wire winding portion, is provided with an at least secondary coil in first wire winding portion and/or the second wire winding portion. The utility model discloses can improve the coupling nature between integrated transformer primary coil of LLC and the secondary coil, make output stable.

Description

LLC integrated transformer and power supply

Technical field

This utility model relates to power technique fields, particularly relates to a kind of LLC integrated transformer and power supply electricity Source.

Background technology

The transformator of traditional band resonant transformation LLC function typically has two kinds, and one is with outer by transformator Connecing inductance and be combined realization, the coupling of this kind of each winding of mode (coil) can be by different coilings Mode is adjusted, but needs external inductance, and cost is high, and it is long-pending relatively big to take PCB surface, is gradually eliminated. Another kind is, is simply integrated in transformator by resonant inductance, utilizes the leakage inductance of transformator to do resonance electricity Sense uses, and this mode will be generally to use skeleton is divided into two or three grooves, and wherein primary part accounts for With a groove, it is in monolateral or middle, other groove coiling secondary windings.This kind of mode can save external electricity Sense, cost is relatively low.But, due to primary coil positional distance relative close relative with secondary coil, The primary leakage inductance formed is less, and the transformator of this structure is easily affected by the fluctuation of load, output shakiness Fixed.

Utility model content

Main purpose of the present utility model is to provide a kind of LLC integrated transformer, it is intended to improve LLC integrated The leakage inductance of transformer, makes transformator output stable.

For achieving the above object, the utility model proposes a kind of LLC integrated transformer, the integrated change of this LLC Depressor includes the skeleton with roll and is arranged at the core assembly on described skeleton, on described roll It is wound with the first primary coil, described first primary coil is provided with the first insulating barrier；Described first exhausted The position of peripheral corresponding described first primary coil of edge layer is provided with the first barricade, and described first barricade will The roll being provided with described first primary coil and described first insulating barrier is divided into the first winding section and Two winding sections, described first winding section and/or the second winding section are provided with level coil at least one times.

Preferably, described first winding section and/or described second winding section are respectively arranged with two described time Level coil, and two described secondary coil layering settings.

Preferably, the roll of described skeleton includes interlude and is positioned at axial two ends and the symmetry of interlude The linkage section arranged, described first primary coil is wound on described interlude.

Preferably, two described secondary coils are coated with the second insulating barrier, outside described second insulating barrier Enclose and the position of corresponding described interlude is wound with the second primary coil.

Preferably, described first winding section and/or the second winding section are arranged with ancillary coil, described auxiliary Coil is between two described secondary wire ring layers.

Preferably, described ancillary coil uses triple insulated wire.

Preferably, described core assembly is EE magnetic core or EFD magnetic core.

Preferably, described first insulating barrier and/or described second insulating barrier are insulating tape.

Preferably, described skeleton has the accommodation space of accommodating described core assembly, and described core assembly sets It is placed in described accommodation space.

Additionally, this utility model also provides for a kind of power supply, this power supply includes LLC as above Integrated transformer；Described LLC integrated transformer includes the skeleton with roll and is arranged at described skeleton On core assembly, described roll is wound with the first primary coil, described first primary coil sets It is equipped with the first insulating barrier；The position of peripheral corresponding described first primary coil of described first insulating barrier is arranged Having the first barricade, described first barricade will be provided with described first primary coil and described first insulating barrier Roll is divided into the first winding section and the second winding section, on described first winding section and/or the second winding section It is provided with level coil at least one times.

This utility model is by the skeleton being provided with roll and the magnetic core group being arranged on described skeleton Part, described roll is wound with the first primary coil, described first primary coil is provided with first exhausted Edge layer；The position of peripheral corresponding described first primary coil of described first insulating barrier is provided with the first barricade, The roll being provided with described first primary coil and described first insulating barrier is divided into by described first barricade First winding section and the second winding section, described first winding section and/or the second winding section are provided with at least one Secondary coil.Wherein, add the distance between the first primary coil and secondary coil by the first barricade, Thus add primary leakage inductance, and then ensure that output is stable.

Accompanying drawing explanation

In order to be illustrated more clearly that this utility model embodiment or technical scheme of the prior art, below will The accompanying drawing used required in embodiment or description of the prior art is briefly described, it should be apparent that, Accompanying drawing in describing below is only embodiments more of the present utility model, for ordinary skill people From the point of view of Yuan, on the premise of not paying creative work, it is also possible to obtain according to the structure shown in these accompanying drawings Obtain other accompanying drawing.

Fig. 1 is the structural representation of this utility model LLC integrated transformer one embodiment；

Fig. 2 is the structural representation of this utility model LLC another embodiment of integrated transformer；

Fig. 3 is the structural representation of this utility model another embodiment of LLC integrated transformer.

Drawing reference numeral illustrates:

Label	Title
		10	Skeleton
20	Core assembly
		30	First insulating barrier
101	First winding section
		102	Second winding section
NP1	First primary coil
		NS	Secondary coil
40	First barricade
		50	Second insulating barrier
60	Second barricade

The realization of this utility model purpose, functional characteristics and advantage will in conjunction with the embodiments, do referring to the drawings into One step explanation.

Detailed description of the invention

Below in conjunction with the accompanying drawing in this utility model embodiment, to the technology in this utility model embodiment Scheme is clearly and completely described, it is clear that described embodiment is only of the present utility model one Section Example rather than whole embodiments.Based on the embodiment in this utility model, this area is general The every other embodiment that logical technical staff is obtained under not making creative work premise, broadly falls into The scope of this utility model protection.

It is to be appreciated that directional instruction in this utility model embodiment (such as upper and lower, left and right, It is forward and backward ...) it is only used for explanation phase under a certain particular pose (as shown in drawings) between each parts To position relationship, motion conditions etc., if this particular pose changes, then directionality indicates also Change the most therewith.

It addition, the description relating to " first ", " second " etc. in this utility model is only used for describing purpose, and It is not intended that indicate or imply its relative importance or the implicit number indicating indicated technical characteristic Amount.Thus, define " first ", the feature of " second " can express or implicitly include at least one should Feature.It addition, the technical scheme between each embodiment can be combined with each other, but must be with ability Based on territory those of ordinary skill is capable of, when the combination of technical scheme occurs conflicting or cannot be real Will be understood that the combination of this technical scheme does not exists now, the protection model not required at this utility model Within enclosing.

The utility model proposes a kind of LLC integrated transformer.

Referring to figs. 1 through Fig. 3, in this utility model embodiment, this LLC integrated transformer include with The skeleton 10 of roll and be arranged at the core assembly 20 on described skeleton 10, described skeleton 10 has appearance Putting the accommodation space of described core assembly 20, described core assembly 20 is arranged in described accommodation space, Wherein skeleton 10 is used for supporting core assembly 20, and to core assembly 20 and just, formed absolutely between secondary coil Edge effect.Wherein, core assembly 20 can be EE magnetic core or EFD magnetic core, naturally it is also possible to is The magnetic core of other shapes, does not the most limit.

Wherein, the roll of skeleton 10 is wound with the first primary coil NP1, it is preferable that skeleton 10 Roll include interlude and be positioned at the axial two ends of interlude and protrude and symmetrically arranged linkage section, the One primary coil NP1 is wound on interlude, the lateral cross section of the section of being vertically connected with and be nearly equal to interlude Lateral cross section, to increase the leakage inductance of secondary coil NS.It is provided with on described first primary coil NP1 First insulating barrier 30, this first insulating barrier 30 preferably insulating tape, insulating tape low price, convenient It is wound around.Wherein, the interposition of the peripheral corresponding described first primary coil NP1 of the first insulating barrier 30 installs Being equipped with the first barricade 40, wherein, the length along roll axial direction of the first barricade 40 is less than roll The length of interlude.Described first barricade 40 will be provided with described first primary coil NP1 and described first The roll of insulating barrier 30 is divided into the first winding section and the second winding section, described first winding section and/or Level coil NS at least one times it is provided with on two winding sections, can be in the upside of the first barricade 40 or downside Secondary coil NS is set, or both sides all arrange secondary coil NS up and down.

In the present embodiment, the first primary coil NP1 is for incoming transport electricity, secondary coil NS and first Primary coil NP1 passes through inductive, will export required voltage after AC signal rectifying and wave-filtering.By short Road secondary coil NS, can obtain primary leakage inductance, and this leakage inductance i.e. constitutes the humorous of LLC integrated transformer Shake inductance.It is understood that in the range of certain distance, secondary coil NS and the first primary coil Relative positional distance between NP1 is the most remote, and corresponding primary leakage inductance is the biggest.Wherein, the first barricade 40 Add the distance between the first primary coil NP1 and secondary coil NS, so, just can rationally adjust Joint primary leakage inductance, it is ensured that transformator output is stable.It is understood that by selecting suitable width First barricade 40, with the distance between relative set the first primary coil NP1 and secondary coil NS, just While can having suitable coupling between guarantee secondary coil NS and the first primary coil NP1, Obtain bigger leakage inductance, and then ensure the efficient, stable of LLC output circuit.

Based on above-described embodiment, further, described first winding section and/or described second winding section are divided Not being provided with two described secondary coil NS, two described secondary coil NS layerings are arranged, such as Fig. 1 extremely Shown in 3, two described secondary coil NS are respectively NS1 and NS2.

In this embodiment, further, the outermost layer coil in two described secondary coil NS1 and NS2 The second insulating barrier 50 it is coated with, the periphery of described second insulating barrier 50 and corresponding described first primary on NS1 The position of coil NP1 is provided with the second primary coil NP2.The periphery of described second insulating barrier 50 is the most each From being provided with one second barricade 60, have between two the second barricades 60 and install for the first primary coil NP1 Space, two the second barricades 60 second primary coil NP2 and outer layer secondary coil NS2 is carried out every From, improve leakage inductance.By secondary coil NS being arranged on the primary line of the second primary coil NP2 and first Between circle NP1, secondary coil NS and the second primary coil NP2, the first primary coil NP1 can be improved Between coupling.Wherein, the second insulating barrier 50 is for by secondary coil NS and the second primary coil Insulate between NP2.This second insulating barrier 50 preferably insulating tape, insulating tape low price, Convenient winding.

Further, with reference to Fig. 3, described first winding section and/or the second winding section are arranged with auxiliary Coil ND, described ancillary coil ND are positioned in the middle of two described secondary coil NS1 and NS2 layer.Auxiliary Index contour circle ND couples with secondary coil NS, exports stable voltage supply this LLC of control integrated The control circuit of transformator uses, or this uses as standby power.Owing to ancillary coil ND is positioned at Between two secondary coil NS, and the degree of coupling between secondary coil NS is the best so that secondary coil NS electric current by the least in the biggest transformation range, the output voltage of this ancillary coil ND is the most steady Fixed.

Wherein, described ancillary coil ND preferably employs triple insulated wire and realizes, and this covered wire has and includes Three-layer insulated material, so without it is carried out insulation processing.

In order to of the present utility model invention thought is better described, below in conjunction with Fig. 1 to Fig. 3 to this practicality The detailed construction of novel LLC integrated transformer and function carry out entirety and illustrate:

Such as Fig. 1 to Fig. 3, wherein ND-in represents the input of ancillary coil ND, and NP-in represents first Primary coil NP1 and the input of the second primary coil NP2, NS-out represents that primary coil NS's is defeated Go out end.The layer of this utility model embodiment is around integrated LLC transformator, by the appropriate design of skeleton 10, Limit the winding position of the first primary coil NP1, and by increasing by the first barricade 40 in the middle part of transformator, Limit the winding position of secondary coil NS1, NS2, to obtain suitable leakage inductance.Wherein, primary coil NP can be divided into two coils, rotating around at innermost layer and outermost layer, corresponding two-layer secondary coil NS1, NS2 is wound on inside, and the upper and lower sides of the first barricade 40 all arranges two-layer secondary coil NS1, NS2, just Level ancillary coil ND is wound on the intermediate layer of two secondary coil NS1, NS2.The LLC of this kind of mode is integrated Transformator, technique is simple, such as: a 400V input, the 200W transformator of 24V output, magnetic core EFD50, primary NP is 33 circles；Secondary NS1 coil 4 circle；Primary about 300uH, as short circuit NS1 Time, the leakage inductance of primary coil NP about 50-70uH；During NS1 and NS2 all short circuits, primary coil NP's Leakage inductance about 30uH.

The general transformator required for LLC resonant power, resonance primary leakage inductance and primary inductance Ratio typically between 1:2 to 1:10, in this utility model embodiment, by by multipath magnetic circuit transformation Device is designed as primary coil and secondary coil NS1 and NS2, surrounds different magnetic circuit number, by rationally setting Meter transformer framework 10 middle coil, the recess width of the i.e. first primary coil NP1, the first barricade 40 Width, carefully regulate core gaps, required primary electrical sensibility reciprocal and leakage inductance can be obtained.

Additionally, the width of regulation the first barricade 40, in the first barricade about 40 both sides difference coiling two-layer Secondary coil NS1 and NS2, on the upside of short-circuit first barricade 40 and/or NS1 or the NS2 coil of downside, Can obtain primary leakage inductance, this leakage inductance constitutes the resonant inductance of LLC resonance circuit.LLC controls IC institute The supply voltage needed, is constituted by being wound on middle ancillary coil ND, owing to employing layer is around scheme, Couple very well with between secondary coil NS, secondary coil NS electric current from the least to the biggest transformation range, Even LLC circuit is to be operated in burst mode, and ancillary coil ND powers the most stable, in secondary When electric current significantly converts, it is ensured that this LLC resonant power control circuit is through assisting the stable work of winding power Make.

This utility model also proposes a kind of power supply, and this power supply includes above-mentioned LLC integrated transformer, The concrete structure of this power supply is with reference to above-described embodiment, owing to this utility model power supply have employed Stating whole technical schemes of all embodiments, the technical scheme the most at least with above-described embodiment is brought All beneficial effects, this is no longer going to repeat them.

The foregoing is only preferred embodiment of the present utility model, not thereby limit of the present utility model specially Profit scope, every under inventive concept of the present utility model, in utilizing this utility model description and accompanying drawing The equivalent structure transformation of Rong Suozuo, or directly/be indirectly used in other relevant technical fields and be included in this In the scope of patent protection of utility model.

Claims

1. a LLC integrated transformer, including with the skeleton of roll and be arranged at the core assembly on described skeleton, it is characterised in that be wound with the first primary coil on described roll, described first primary coil is provided with the first insulating barrier；The position of peripheral corresponding described first primary coil of described first insulating barrier is provided with the first barricade, the roll being provided with described first primary coil and described first insulating barrier is divided into the first winding section and the second winding section by described first barricade, and described first winding section and/or the second winding section are provided with level coil at least one times.

2. LLC integrated transformer as claimed in claim 1, it is characterised in that be respectively arranged with two described secondary coils on described first winding section and/or described second winding section, and two described secondary coil layerings are arranged.

3. LLC integrated transformer as claimed in claim 2, it is characterised in that the roll of described skeleton includes interlude and is positioned at the axial two ends of interlude and symmetrically arranged linkage section, and described first primary coil is wound on described interlude.

4. LLC integrated transformer as claimed in claim 3, it is characterised in that being coated with the second insulating barrier on two described secondary coils, the periphery of described second insulating barrier and the position of corresponding described interlude are wound with the second primary coil.

5. the LLC integrated transformer as described in any one of claim 2 to 4, it is characterised in that be arranged with ancillary coil on described first winding section and/or the second winding section, described ancillary coil is between two described secondary wire ring layers.

6. LLC integrated transformer as claimed in claim 5, it is characterised in that described ancillary coil uses triple insulated wire.

7. LLC integrated transformer as claimed in claim 1, it is characterised in that described core assembly is EE magnetic core or EFD magnetic core.

8. LLC integrated transformer as claimed in claim 4, it is characterised in that described first insulating barrier and/or described second insulating barrier are insulating tape.

9. LLC integrated transformer as claimed in claim 1, it is characterised in that described skeleton has accommodation space, and described core assembly is arranged in described accommodation space.

10. a power supply, it is characterised in that include the LLC integrated transformer as described in claim 1 to 9 any one.