CN207977202U - Transformer and its device - Google Patents

Abstract

A kind of transformer and its device, including：Equitant first tape conductor and the second tape conductor, equitant first tape conductor and the second tape conductor winding, and end mutually staggers in the axial direction, be formed as include primary coil and secondary coil coil group.Mutually insulated between first tape conductor and the second tape conductor.Using the above scheme, the heat-sinking capability of transformer can be improved and improve the space availability ratio of transformer.Pass through the tape conductor winding that overlaps, effect is got well than traditional litz wire when heat dissipation, simultaneously because end mutually staggers in the axial direction, therefore the cross-sectional area smaller of the transformer winding formed, it meets in the production of field of switch power, transformer especially wants the requirement of very little on cross-sectional area in volume.In addition even closer to wind by being equipped with insulating materials between conductor, due to mutually insulated between conductor, the accuracy of transformer is also improved, reduces the coil loss of transformer.

Description

Transformer and its device

Technical field

The utility model is related to field transformers more particularly to a kind of tape conductor to wind the transformer and its dress to be formed It sets.

Background technology

Transformer is the device for changing alternating voltage using the principle of electromagnetic induction, and main member is primary coil, secondary Grade coil and iron core (magnetic core).Major function has：Voltage transformation, current transformation, impedance transformation, isolation, voltage stabilizing (magnetic saturation transformation Device) etc..Transformer is made of iron core (or magnetic core) and coil, and there are two coils or more than two windings, wherein connecing power supply Winding is primary coil, remaining winding is secondary coil.It can convert alternating voltage, electric current and impedance.Simplest iron The coil of iron core that heart transformer is made by a soft magnetic materials and two the number of turns being sleeved on iron core not etc. is constituted.The work of iron core Be reinforce two coils between magnetic coupling.In order to reduce in iron vortex and magnetic hystersis loss, iron core is by the silicon steel plate stacking painted It forms；There is no the contact of electricity, coil to be coiled by insulated copper wire (or aluminum steel) between two coils.One coil connects AC power and claims For primary coil (or primary coil), another coil connects electrical appliance and is known as secondary coil (or secondary coil).Actual transformer is Very complicated, it is inevitably present copper loss (coil resistance fever), iron loss (iron core fever) and the leakage field (magnetic being closed through air The line of induction) the problems such as.

It the problems in is used to solve above-mentioned transformer, the staff of related field has carried out certain exploration and changed Into.Document 1 (Chinese patent CN201511029424.1) discloses a kind of loose couplings change for electric vehicle wireless charging Depressor device, in the document, transformer using multiply litz wire (litz wire refer to a conductor be by more independently insulate lead Body is twisted or weaves) formation coil in parallel, the coil loss of transformer can be reduced, transformation can be reduced in conjunction with strip magnetic core The amount of thinking highly of and the former secondary side coefficient of coup of raising.But the space availability ratio of multiply litz wire is very low, not easy to produce, heat dissipation is also compared It is poor.

Above-mentioned document 1 (Chinese patent CN201511029424.1) solves the coil loss, weight and coupling of transformer The problems such as, but still also have many problems such as cost, heat dissipation etc. to remain unsolved, in order to solve the problems, such as heat dissipation, document 2 (Chinese patent CN201520805053.0), which is disclosed, provides a kind of high frequency transformer, including magnetic core, armature winding and it is secondary around Group, armature winding and secondary windings are all made of hollow metal tube coiling and form, and are connected with cooling medium in metal tube, metal tube it is outer The difference of diameter and internal diameter is less than twice of penetration depth.Replace existing multiply by using the hollow metal tube for being connected with cooling medium Stranded conductor carrys out the primary and secondary winding of coiling high frequency transformer, reduces the consumption of metal material, avoids kelvin effect (kelvin effect Exactly when having alternating current or alternating electromagnetic field in conductor, the current distribution is uneven of conductor is even, and current convergence is in conductor " skin " part, that is to say, that for current convergence in the thin layer of conductor appearance, closer to conductive surface, current density is bigger, leads Actually electric current is smaller inside line, as a result increases the resistance of conductor, its loss power is made also to increase) while, it improves The heat-sinking capability of winding.

Applied to the Switching Power Supply under the environment such as alternating current, area is often restricted to the small-sized brick range of transformation module Interior (such as 1/2 brick usually said, quarter brick etc.), therefore require that the transformer inside for Switching Power Supply will be very in volume It is small.However, above-mentioned document 1 (Chinese patent CN201511029424.1) and document 2 (Chinese patent CN201520805053.0) In terms of not solving the problems, such as volume and efficiency, so in the production of field of switch power, it is above-mentioned that urgent need finds a kind of solution The Transformer structure of problem.

Utility model content

The purpose of this utility model is the space for solving how to improve transformer while improving the heat-sinking capability of transformer Utilization rate and the problem of reduce coil loss.

To solve the above problems, the utility model, which provides a kind of tape conductor, winds the transformer to be formed, it is described band-like Wrapping conductors formed transformer include：Equitant first tape conductor and the second tape conductor, equitant described first Tape conductor and the second tape conductor winding, and end mutually staggers in the axial direction, is formed as including primary coil and secondary The coil group of coil, mutually insulated between first tape conductor and the second tape conductor.

Herein, end mutually staggers the end for meaning first tape conductor and the second tape conductor in the axial direction At least part of between portion is underlapped.

Optionally, equitant first tape conductor and the second tape conductor winding, and end is mutual in the axial direction It is staggered, is formed as at least two cyclic annular volume portions, the primary coil and corresponding first tape conductor of secondary coil and the second band The both ends of shape conductor are respectively formed as the tap for being electrically connected with primary circuit, secondary circuit, the primary coil and described The tap of secondary coil is respectively in different cyclic annular volume portions.

Herein, first tape conductor and the second tape conductor winding, and mutually stagger in the axial direction can be with shape for end At more than two ring-type volume portion, including three, many situations such as four.The case where for forming two cyclic annular volume portions, the pumping Head includes two taps of two taps and secondary coil of primary coil, and two taps of primary coil are located at two not In same cyclic annular volume portion, two taps of secondary coil are also located in two different cyclic annular volume portions.

Optionally, first tape conductor and the second tape conductor are equipped with the bonding material of insulation in the side close to axle center Material.

Optionally, the tap of the primary coil and the secondary coil is in non axial upper extension.The primary coil and The tap of the secondary coil means in non axial upper extension, and the tap of the primary coil and the secondary coil can be with With it is axial at an angle, including vertical, 30 degree of angles, 45 degree of angles etc., but cannot extend in the axial direction, that is, tap side To cannot with it is axially coincident.

Optionally, the transformer includes multiple coil groups, the pumping on the primary coil of multiple coil groups Head is aligned in the axial direction, and the tap on the secondary coil of multiple coil groups is aligned in the axial direction.Herein, in this practicality Transformer described in one embodiment in novel may include multiple coil groups, and multiple coil groups have respectively included primary line Circle, secondary coil, these corresponding primary coils are all there are two tap, and also all there are two taps for corresponding secondary coil.In axis Upwards, the tap of above-mentioned multiple primary coils can be aligned respectively, and the tap of above-mentioned multiple secondary coils is also aligned respectively.It is optional Ground, the transformer further include spool and several connectors, magnetic part, and described connector one end is provided with for grafting institute The interface of tap is stated, the other end is electrically connected with external substrate, and the coil group is sheathed on the spool, the magnetism Component and the spool are closely chimeric.

The utility model further relates to a kind of potential device, includes above-mentioned transformer, the potential device further includes having One printed circuit board, the transformer are fixed on the printed circuit board.

In conclusion in the utility model, fitted closely between equitant tape conductor, without the bad heat conduction such as air Body, while the area of heat dissipation is increased using equitant tape conductor, therefore be more conducive to radiate.Equitant tape conductor volume Around when, adjacent tape conductor can be closely adhered to, compared with the existing technology space availability ratio higher, simultaneously because end exists The cross-sectional area also smaller for the transformer winding for mutually staggering, therefore being formed in axial direction.In addition it is set between equitant tape conductor There is an adhesives of insulation, the adhesives of insulation is coated in equitant tape conductor close to the side in axle center, and when coiling is exhausted The adhesives of edge is in hot melt state, can have better fitting between tape conductor so that in coiling.Due to tape conductor For the conductor with one fixed width, it is possible to reduce the coil loss of transformer.The tap of coil can with it is axial at an angle, The winding method for being not limited to extend in the axial direction, while being overlapped compared to tape conductor end, tap are without additional processing It can be connected with connecting component.

Description of the drawings

Fig. 1 is the structural schematic diagram of one coil group of the utility model embodiment；

Fig. 2 is the stereogram of one coil group of the utility model embodiment；

Fig. 3 is the stereogram of transformer in the utility model embodiment one；

Fig. 4 is the explosive view of transformer in the utility model embodiment one；

Fig. 5 is the structural schematic diagram of the transformer in the case of having multiple coil groups in the utility model embodiment two；

Fig. 6 is the structural schematic diagram of the tape conductor there are two secondary coil in the utility model embodiment three；

Fig. 7 is that there are two the circuit diagrams of the transformer in the case of secondary coil in the utility model embodiment three.

Specific implementation mode

(embodiment one)

The embodiments of the present invention are further explained below according to attached drawing.

Fig. 1 is the structural schematic diagram of the present embodiment coil group, and Fig. 2 is the stereogram of the present embodiment coil group, and Fig. 3 is this reality Apply the stereogram of a transformer.As shown in Figures 1 to 3, the transformer that the present embodiment is related to includes：It is equitant band-like as first The copper foil 11 of conductor and copper foil 12 as the second tape conductor.

Tape conductor in the present embodiment uses copper foil, may be used in other examples other with extension The conductive material of property is as tape conductor.In the present embodiment, equitant copper foil 11 and copper foil 12 are wound, and end is in axial direction On mutually stagger, be formed as include primary coil and secondary coil coil group 43, wherein 11 coiling of copper foil be primary coil, 12 coiling of copper foil is secondary coil.

In the prior art, primary coil and secondary coil are formed some by litz wire coiling, and litz wire is also known as twisted wire, are twisted Gap and insulating layer have been certainly existed between each stock conducting wire in zygonema, has caused the line footpath of twisted wire equal with conductor cross-sectional area Non-stranded conducting wire compare bigger.Meanwhile the cross section of the end of litz wire is approximately round, after the coiling each litz wire it Between also certainly exist gap.In contrast, when copper foil 11 and copper foil 12 are wound, adjacent copper foil can be closely adhered to, space Utilization rate higher.Therefore the volume for the coil group that copper foil 11 and the winding of copper foil 12 are formed winds the coil to be formed relative to litz wire Group smaller.

On the other hand, the Switching Power Supply being applied under the environment such as alternating current, area are often restricted to the small of transformation module Within the scope of shaped brick block (such as 1/2 brick usually said, quarter brick etc.), therefore transformer is in volume especially on cross-sectional area It is required that it is stringenter, and then relative loose is required on the direction vertical with cross-sectional area.And 11 He of copper foil in the present embodiment The cyclic annular volume portion 21 and cyclic annular volume portion 22 that the winding of copper foil 12 is formed are staggered in the horizontal, therefore the case where compared to not being staggered Under, for the copper foil 11 and copper foil 12 of same quality, the cross-sectional area smaller of the transformer winding formed in the present embodiment meets In field of switch power, transformer especially wants the requirement of very little on cross-sectional area in volume.

In addition, heat dissipation can also be enhanced as primary coil or secondary coil using copper foil 11 and copper foil 12, due to copper foil It fits closely between 11 and copper foil 12, also increases without poors conductor of heat such as air, while using copper foil 11 and copper foil 12 The area of heat dissipation, therefore hereby line is well many by effect Billy in heat dissipation.In addition to this, the band-like shape that copper foil uses, The loss of coil can be reduced with as litz wire to avoid negative effects such as kelvin effect, approach effects.

Equitant copper foil 11 and copper foil 12, both ends are wound in the opposite direction respectively, and end phase in the axial direction It is mutually staggered, is formed as at least two cyclic annular volume portions, the situation in the present embodiment is to form two cyclic annular volume portions, is cyclic annular volume respectively Portion 21 and cyclic annular volume portion 22.Such as Fig. 1, mutually insulated between equitant copper foil 11 and copper foil 12, and the two is close to axle center Side is equipped with the adhesives of insulation, in Fig. 1 meaning 101 be where the adhesives of insulation at example.

Specific winding method may include following manner：

Mode one, the equitant copper foil 11 for being coated with insulating cement and copper foil 12 are wound, and insulating cement is coated in copper foil 11, copper foil On one side end face in 12 close axle center, copper foil is heated in the side of uncoated insulating cement in advance from copper foil, then to copper Foil carries out coiling.So, insulating cement is in hot melt state, can be preferably bonded between copper foil so that in coiling.

For example, copper foil 11 and copper foil 12 are closely overlapped, and it is inclined, form certain angle with the roller bearing of coiling Degree, the intermediate position of equitant copper foil first conform to roller bearing, and the both ends of copper foil carry out in the opposite direction respectively around roller bearing Winding, such as:One end is wrapped anti-clockwise, and the other end is wound clockwise.The both ends are staggered and form cyclic annular volume portion 21 and ring Shape volume portion 22.

Mode two is wound from one end of the copper foil of overlapping, such as conforms to roller bearing from copper foil one end of overlapping, another Coiling clockwise is pressed in end along roller bearing, and cyclic annular volume portion 21 and cyclic annular volume portion 22 are formed after then the both ends are staggered.

Only enumerate two kinds of common winding methods herein for reference, in practical operation, winding method be it is diversified, only Construction to be formed is that the copper foil 11 of overlapping and the both ends of copper foil 12 are not overlapped.

Fig. 2 is the stereogram of the present embodiment coil group.As shown in Fig. 2, primary coil and secondary coil is corresponding is used as The both ends of the copper foil 11 of one tape conductor and copper foil 12 as the second tape conductor be respectively formed as with primary circuit, secondary The tap of grade circuit electrical connection, 31 indicate the tap in the cyclic annular volume of copper foil 11 portion 21, and 32 indicate copper foil 11 in cyclic annular volume portion 22 Tap, 33 indicate tap of the copper foils 12 in cyclic annular volume portion 21, and 34 indicate tap of the copper foils 12 in cyclic annular volume portion 22.It is primary The tap of coil and secondary coil is in non axial upper extension, in the present embodiment, the aforementioned four tap of copper foil 11 and copper foil 12 31,32,33,34 in non axial upper extension.In the present embodiment, winding method uses aforesaid way one, i.e., from centre to two phases The advantages of anti-direction is wound is：In this case, obliquely due to copper foil 11 and copper foil 12 and the roller bearing of coiling Setting, the roller bearing for coiling only need the side wound in copper foil 11 and copper foil 12 to scroll up.

In addition, two taps of primary coil and secondary coil are respectively in different cyclic annular volume portion.Two pumpings of copper foil 11 First 31, tap 32 is located in cyclic annular volume portion 21 and cyclic annular volume portion 22, and two taps 33, the tap 34 of copper foil 12 are located at In cyclic annular volume portion 21 and cyclic annular volume portion 22.

Fig. 4 is the explosive view of the present embodiment transformer, as shown in figure 4, the transformer that the present embodiment is related to further includes having:Gu Clamp 41, magnetic part 42, magnetic part 45, coil group 43, spool 44, and the connector 61 for grafting tap, company Fitting 62, connector 63, connector 64.Outside magnetic of the magnetic part 42 integrally formed with magnetic core 422 and positioned at 422 both sides of magnetic core Access 423, outside flux path 421.Outside magnetic flux of the magnetic part 45 integrally formed with magnetic core 452 and positioned at 452 both sides of magnetic core Road 453, outside flux path 451.Transformer is fixed and is connected electrically to printed circuit board 46.

Connector 61, connector 62, connector 63,64 one end of connector are provided with the interface for grafting tap, separately One end is electrically connected with printed circuit board 46.For example, one end of connector 61, connector 62, connector 63 is respectively arranged with grafting Mouth 51, interface 52, interface 53, the other end extend and are soldered in the installation point of printed circuit board 46.When installation, coil group 43 tap 31 is inserted into interface 51, realizes the connection of coil group and printed circuit board 46.As shown in figs. 34, remaining Tap in coil group 43 is also plugged into corresponding interface.

Coil group 43 is sheathed on spool 44, and magnetic part 42 and magnetic part 45 are close chimeric with spool 44.Volume Spool 44 includes pedestal.Pedestal is integrally formed with spool 44, and is made of insulating materials.

In the present embodiment, magnetic part is divided into two parts, magnetic part 42 and magnetic part 45, in other embodiments In, magnetic part can be integral type.The effect of magnetic part is to provide magnetic loop, and coil group generates magnetic field after being powered, The magnetic line of force constitutes magnetic loop by magnetic part, and the magnetic field intensity of entire magnetic circuit is made to reach maximum.Magnetic part is usually by siliceous Amount is higher, and surface is coated with the hot rolling of insulated paint or cold-reduced silicon sheet closed assembly forms.Magnetic part is divided into two parts up and down herein, Main function is to assemble for convenience, is arranged with the spool 44 of coil group 43 and more easily can closely be entrenched in magnetic portion Part 42 and magnetic part 45 surround in the space formed.

As shown in figure 3, geometrical clamp 41 is fixed on printed circuit board, the other parts of transformer, which can block, to be set to geometrical clamp 41 are formed by with printed circuit board in space.

(embodiment two)

Fig. 5 is the structural schematic diagram of the transformer in the case of having multiple coil groups in the present embodiment.As shown in figure 5, this Embodiment and embodiment one the difference is that, in the present embodiment, the coiler part 80 of transformer is stacked by multiple coil groups It is formed certainly, in the present embodiment there are four coil groups, the coil group of other quantity may be used in other examples.

From side, extraction has as primary coil tap the multiple coil groups being stacked in coiler part 80 as shown in Figure 5 Tap 75, tap 76, tap 77, tap 78.After tap 75 and tap 77 are aligned in the axial direction, it is inserted into 61 one end of connector On interface 51.After tap 76 and tap 78 are aligned in the axial direction, it is inserted on the interface 52 of 62 one end of connector.Multiple lines The other side of circle group, then corresponding extraction have each tap of secondary coil, are also inserted into after corresponding alignment in the axial direction corresponding Connector one end interface on (be not shown in figure due to blocking).

The advantageous effect of the multiple coil groups of setting combination is in transformer, and the producer or designer can become in assembling Prefabricated a certain parameter, the coil group of specification can pass through different numbers as component for the coil of different specifications before depressor The combination of the component of amount or parameter is realized, need not be changed specification every time and is all customized new coil group again.

(embodiment three)

Fig. 6 is the structural schematic diagram of the tape conductor there are two secondary coil in the present embodiment.Fig. 7 is that have in the present embodiment The circuit diagram of transformer in the case of two secondary coils.As shown in figs. 6-7, the present embodiment it is different from embodiment one it Be in, coil group includes the equitant copper foil 91 as the first tape conductor and the copper foil 92 as the second tape conductor, Copper foil 93 as third tape conductor.

In the present embodiment, equitant copper foil 91, copper foil 92 and copper foil 93 are wound, and end is mutually wrong in the axial direction Open, be formed as include primary coil 81 and secondary coil 82, secondary coil 83 coil group, wherein copper foil 91 forms primary line Circle 81, copper foil 92, copper foil 93 are respectively formed secondary coil 82, secondary coil 83.

It will be appreciated by those skilled in the art that primary coil and secondary coil can have respectively it is multiple, therefore remove first band It is overlapped with again other than shape conductor and the second tape conductor more than one as other tape conductors of primary or secondary coil Scheme also belongs to the scope of protection of the utility model.The shape of the cross section of the coil group disclosed in the utility model is circle, But other polygons such as rectangle, pentagon of other shapes than circular also belong to the protection model of the utility model It encloses.

In addition, disclosure is as above in the utility model, but the utility model is not limited to the respective embodiments described above, Various changes can be made in range shown in claim, and the technological means disclosed respectively in different embodiments is carried out Embodiment that is appropriately combined and obtaining is also included in the technical scope of the utility model.

Claims (7)

1. a kind of transformer, which is characterized in that including：

Equitant first tape conductor and the second tape conductor,

Equitant first tape conductor and second tape conductor winding, and end mutually staggers in the axial direction, shape As including the coil group of primary coil and secondary coil,

Mutually insulated between first tape conductor and second tape conductor.

2. transformer according to claim 1, which is characterized in that

Equitant first tape conductor and the second tape conductor winding, and end mutually staggers in the axial direction, is formed as At least two cyclic annular volume portions,

The primary coil and the both ends of corresponding first tape conductor of secondary coil and the second tape conductor are respectively formed as using In the tap being electrically connected with primary circuit, secondary circuit,

Two taps of the primary coil and the secondary coil are respectively in different cyclic annular volume portion.

3. transformer according to claim 1, which is characterized in that

First tape conductor and the second tape conductor are equipped with the adhesives of insulation in the side close to axle center.

4. transformer according to claim 2, which is characterized in that

The tap of the primary coil and the secondary coil is in non axial upper extension.

5. transformer according to claim 2, which is characterized in that

The transformer includes multiple coil groups,

Tap on the primary coil of multiple coil groups is aligned in the axial direction,

Tap on the secondary coil of multiple coil groups is aligned in the axial direction.

6. transformer according to claim 5, which is characterized in that further include：

Spool and several connectors,

Described connector one end is provided with the interface for tap described in grafting, and the other end is electrically connected with external substrate, institute Coil group is stated to be sheathed on the spool,

Magnetic part,

The magnetic part is mutually chimeric with the spool.

7. a kind of potential device, which is characterized in that include transformer according to any one of claims 1 to 6, the transformation Device further includes having a printed circuit board, and the transformer is fixed on the printed circuit board.