CN208489096U - Transformer - Google Patents

Abstract

Transformer.According to various aspects, disclosed herein is transformer, which includes primary coil, secondary coil and core, and wherein primary coil is branched off at least two series including First Series and second series.First Series and secondary coil interweave.Second series and the coil of intertexture are separately wound.

Description

Transformer

Technical field

This disclosure relates to the adjustable leakage inductance in transformer.

Background technique

This part provides background information related with the disclosure, is not necessarily the prior art.

Wireless charger, which provides convenient mode for user, to be come to various types of battery powered electronic devices and machine It recharges.Mobile phone, digital camera and game console are that can have can be by the device for the battery that wireless charger recharges Example.Under pulsewidth modulation (PWM) mode for the power supply of Sofe Switch (for example, no-voltage and Zero Current Switch) technology, For participating in resonance effect together with capacitor to realize Sofe Switch, the leakage inductance of main transformer becomes extremely important.

The transformer of the prior art is constructed such that primary coil and secondary coil independently wind or wind mutually (institute " sandwich " winding of meaning) on core.Leakage inductance modification range in these constructions is not flexible.Improved transformer can reduce The switching loss that Metal Oxide Semiconductor Field Effect Transistor (MOSFET) diode is come under higher frequency, especially exists In high voltage and/or high current application, such as popular vehicle-mounted charge (OBC) communication station.

However, how from transformer winding constitution realization, accurate and flexible leakage inductance is still problem.That is, for One transformer winding construction, adjustable leakage inductance range are very narrow.In addition, AC (exchange) copper loss increases.

Utility model content

This part provides the General Introduction of the disclosure, and not the comprehensive disclosure of its full scope or its all feature.

A kind of transformer is provided, which includes primary coil, secondary coil and core, which is characterized in that described first Grade path is at least two series for including First Series and second series.

According to various aspects, a kind of illustrative embodiments of transformer are disclosed, which includes primary coil, secondary Coil and core.Primary coil is branched off at least two (for example, three) series.For example, primary coil can be branched off into multiple series (at least two), wherein (at least) first is wound together with secondary coil using sandwich construction.Primary coil second (or More) branch independently winds.By adjusting the number of turns ratio of the first primary coil series, the flexible control of leakage inductance is obtained. Further, since the second primary coil series and secondary coil (can with the first primary coil series according to " sandwich " mode together with Winding) certain distance is kept, so AC loss will keep stablizing during adjusting leakage inductance.

In certain embodiments, the First Series of primary coil and secondary coil interweave, the second series of primary coil Do not interweave with secondary coil.In certain embodiments, interweave according to sandwich style deployment arrangements.

There is disclosed herein the methods for using these transformers.According to various aspects, discloses a kind of pair of voltage and be depressured Method illustrative embodiments, this method include to include primary coil, secondary coil and core transformer supply electric current. Primary coil is branched off at least two series including First Series and second series.The First Series and secondary wire of primary coil Circle interweaves.The second series of primary coil do not interweave with secondary coil.The sum of winding of primary coil series is greater than secondary coil Winding.

The method for manufacturing these transformers is also disclosed herein.According to description provided herein, other applicable neck Domain will become obvious.Description and specific example in the content of the present invention are intended merely for illustrating, and are not intended to be limiting The scope of the present disclosure.

Detailed description of the invention

Drawings described herein is only used for illustrating selected embodiment rather than all possible implementation, not It is intended to limit the scope of the present disclosure.

Fig. 1 is the perspective view of transformer according to illustrative embodiments.

Fig. 2 is the cross-sectional view for showing the three dimensional arrangement of component of transformer according to illustrative embodiments.

Fig. 3 is to show the resonant inductance (with microhenry (μ H) for unit) of transformer according to illustrative embodiments to primary The line chart of the number of turns B (the number of turns in the second series of two serial primary coils).

Fig. 4 is to show the ratio between AC resistance and the D.C. resistance of transformer according to illustrative embodiments (ACR/DCR) To the line chart of 0 to 200KHz frequency (with kHz (KHz) for unit).

Through multiple diagrams of attached drawing, corresponding label indicates corresponding part.

Specific embodiment

Example embodiment is more fully described now with reference to attached drawing.

The illustrative embodiments of transformer disclosed herein and method can be relieved stated in the background above Problem.In certain embodiments, the illustrative embodiments of transformer disclosed herein can be advantageously utilised in for zero electricity Compress switch (ZVS) and Zero Current Switch (ZCS) application soft switch technique in.In particular, these transformers and method are neatly And leakage inductance is accurately controlled, but without changing design of transformer and without changing efficiency performance.

Disclosed herein is the illustrative embodiments of transformer, and wherein primary coil is branched off into multiple series (at least two It is a), one of them (or multiple) wind together with secondary coil.In certain embodiments, the first primary coil branch and time Grade coil twine according to " sandwich " construction around.Remaining primary coil branch winds independently about core.By adjusting and secondary series The number of turns in the branch of the primary series wound together, can get the flexible control of leakage inductance.In addition, the independent lines of primary branch Circle is arranged on away from any given desired distance of secondary coil.By adjusting the distance, modified regardless of leakage inductance, AC Loss can keep or maintain stable.

Referring now to attached drawing, Fig. 1 shows showing for transformer (100) of specific implementation one or more various aspects of the disclosure Example property embodiment.As shown in Figure 1, transformer (100) includes the coil (103,104,105) around core (102) winding.Fig. 1 institute The core (102) shown is E shape core, but the various aspects of the utility model disclosed herein in other core shapes (for example, I shape, C Shape, L shape, O shape etc.) under can equally effectively work.In certain embodiments, core can have shell structure.Core can be single-phase or Heterogeneous structure.Similarly, core (102) shown in FIG. 1 is shown as solid bodies.But in other embodiments, core can be by Multiple thin layer (for example, insulation iron or ferrite etc.) compositions.

In this exemplary embodiment, primary coil (103,105) is branched off into two series.In other embodiment In, primary coil may be logically divided into more than two (for example, 3,4,5,6,7,8,9,10 or more) branch.One primary coil point Branch (103) and secondary coil (104) interweave.Another primary coil branch (105) is certain away from (103/104) mutually winding series It is wound at distance around core.The illustrative embodiments that this intertexture winding is shown in Fig. 2 become it illustrates as disclosed herein The two-dimensional cross sectional of the illustrative embodiments of depressor.Two windings of secondary coil are sandwiched in the three of the first primary coil branch Between a winding.Second branch of primary coil individually winds.

The inventor of the utility model is surprised to find that (Fig. 3), humorous when arranging winding according to mode disclosed herein The inductance that shakes is directly proportional to the number of turns of intertexture coil.In particularly surprising discovery, inventor's discovery of the utility model is humorous Growth rate sharp increase under 6 circles of vibration inductance.For example, see line chart shown in Fig. 3, show according to illustrative embodiments Transformer resonant inductance (with microhenry (μ H) for unit) to primary turns B (in the second series of two serial primary coils The number of turns).

However, can largely be wrapped although leakage inductance can be controlled by regulating winding the number of turns as shown above (Fig. 4) is lost containing caused AC.For example, see line chart shown in Fig. 4, transformer according to illustrative embodiments is shown The ratio between AC resistance and D.C. resistance (ACR/DCR) to 0 to 200KHz frequency (with kHz (KHz) be unit).Such as Fig. 4 institute Show, ACR/DCR is slightly increased from about 1 to about 1.1 in about 0 to 200KHz frequency range.

Fig. 1 is returned, AC loss can be made to stablize by adjusting the distance between 103/104 and 105.In particular implementation In, the gap between 103/104 and 105 is not wider than 105 coil width, such as not wider than 105 coil width two/ One, the one third of not wider than 105 coil width, or not wider than 105 coil width a quarter.In particular implementation In mode, a quarter that the gap between 103/104 and 105 is at least 105 coil width is wide, is for example, at least 105 The one third of coil width is wide, and the half of at least 105 coil width is wide, at least as 105 coil width Width, the half as much again (1.5x) of at least 105 coil width is wide, or at least 105 coil width it is twice wide.Specific In embodiment, the gap between 103/104 and 105 is wide between twice of width between the about a quarter of 105 coil width, Such as it is wide between half as much again (1.5x) width between the about one third of 105 coil width, or between 105 coil width Between about half is wide and width is approximately equal.

The illustrative embodiments of above-mentioned transformer can improve ZVS and ZCS application.Compared with conventional coil winding construction, Transformer device structure disclosed herein is highly beneficial.For example, by adjusting gap width as disclosed herein, it can be in initial designs Stage accurately controls leakage inductance, therefore avoids the need for repeatedly adjusting the packaging of the coil in the transformer constructed.

There is disclosed herein the methods for the illustrative embodiments for manufacturing above-mentioned transformer.As described above, these transformers It can be by being made around core wound around coil.There are two coils: primary coil and secondary coil for transformer tool described herein.? Transformer be intended to make output voltage relative to input voltage " boosting " in the case where, secondary coil have it is more more than primary coil Winding.In the case where transformer, which is intended to, makes output voltage relative to input voltage " decompression ", primary coil has than secondary wire Enclose more windings.Transformer shown in Fig. 2 is " decompression " transformer, but line can be changed in the embodiment shown in figure 2 The quantity of winding is enclosed to create " boosting " transformer.Regardless of transformer is " boosting " transformer or " decompression " transformer, this paper Disclosed exemplary transformer can manufacture in this way: primary coil is divided at least two branches, it then will be in those branches A branch wound around core alone, and another branch and secondary coil are wound according to interlaced structure around core.

There is disclosed herein the methods being depressured to voltage.In certain embodiments, this method includes to transformer Supply electric current, wherein transformer includes primary coil, secondary coil and core.Primary coil is branched off at least two series.It is primary The First Series and secondary coil of coil interweave.The second series of primary coil do not interweave with secondary coil.Primary coil series The sum of winding be greater than secondary coil winding.In the particular implementation of this method, friendship is arranged according to sandwich style configuration It knits.In certain embodiments, primary coil is branched off at least three series, for example, at least 4, at least five, at least six, extremely 7 few, at least eight, at least nine, at least ten series etc..Between space between first and second primary coils series defines Gap.In certain embodiments, the gap between the first and second primary coils series is not wider than the second primary coil series Coil width, for example, not wider than the second primary coil series width half, not wider than the second primary coil series The about one third of width, or not wider than the second primary coil series width about a quarter.

Example embodiment is provided, so that the disclosure is thorough, and range is fully conveyed to those skilled in the art.Statement Many details as such as example of particular elements, device and method, to provide the thorough of embodiment of the present disclosure Understand.It will be apparent for a person skilled in the art that detail need not be used, example embodiment can be with many differences Form is implemented, and example embodiment should not be construed as limitation scope of disclosure.It is not right in certain illustrative embodiments Already known processes, known devices structure and known technology are described in detail.Furthermore it is possible to by the one or more of the disclosure The advantages of illustrative embodiments are realized and improve merely to the purpose that illustrates and provide, and do not limit the model of the disclosure It encloses, this is because illustrative embodiments disclosed herein can provide all above-mentioned advantages and improvements or be not providing, and And it still falls in the scope of the present disclosure.

Specific size disclosed herein, specific material and/or concrete shape are substantially illustrative, and do not limit The scope of the present disclosure.The occurrence of given parameters disclosed herein and the specific range of value are not excluded for can be disclosed herein One or more examples used in it is other value and value ranges.Furthermore, it is possible to expect, design parameter described herein Any two occurrence can limit the endpoint for the range of value for being suitably adapted for given parameters (that is, the of open given parameters One value and second value can be interpreted that open given value can also be using any value between the first value and second value).Example Such as, if parameter X is illustrated as with value A and being also illustrated as having value Z herein, it is contemplated that parameter X can have There is the value range from about A to about Z.Similarly, it is envisioned that two or more value ranges of open parameter (no matter these models Enclose nested, overlapping or different) contain all of the value range advocated using the endpoint of disclosed range It may combination.For example, if parameter X is illustrated as with the value within the scope of 1-10 or 2-9 or 3-8 herein, It is contemplated that parameter X can have other value ranges, including 1-9,1-8,1-3,1-2,2-10,2-8,2-3,3-10 and 3- 9。

Term as used herein is just for the sake of description particular example embodiment, it is not intended that limitation.Such as this paper institute Use, unless be explicitly indicated in context, otherwise singular " one ", "one" is also intended to including plural form.Term " packet Include ", "comprising" and " having " can dual-purpose, therefore it is specified there are the feature, entirety, step, operations, elements, and/or components, but It is not preclude the presence or addition of one or more other features, entirety, step, operation, component, assembly unit and/or its group.This Method and step, handling and operation described in text are not necessarily to be construed as necessarily requiring them specific according to what is discussed or show Sequence executes, unless having specifically identified executes sequence.It should also be understood that can be using additionally or alternatively step.

When element or layer be referred to as on another element or layer, " being joined to " another element or layer, " being connected to " it is another When one element or layer or " being integrated to " another element or layer, it can directly on another element or layer, be joined to another member Part or layer are connected to another element or layer and are perhaps integrated to another element or layer or there may be intermediary element or layer.It compares Under, when element be referred to as directly on another element or layer, " being directly connectcted to " another element or layer, " be directly connected to To " another element or layer or " being bonded directly to " another element or when layer, intermediary element or layer may be not present.For describing Other words of relationship between element should be explained in a similar way (for example, " between " and " directly between ", " phase It is adjacent " and " direct neighbor " etc.).As it is used herein, term "and/or" includes any of one or more related institute lists And all combinations.

Term " about " instruction when being applied to value calculate or measurement permissible value it is some slight inaccurate (accurate with value Value has certain close；It is approximate or reasonably close to the value；Almost).If for some purposes, " about " provided not smart It is not really available this ordinary meaning in the art to understand, then " about " used herein at least instruction may be due to commonly surveying Amount method or the variation generated using these parameters.For example, the terms " usual ", " about " and " substantially " can be used for table Show in fabrication tolerance.Such as it is used or institute when such as the amount of the ingredient of modification the utility model or reactant herein The term " about " of use used typical measurement and place when referring to for example, by preparing concentrate or solution in real world Program is managed due to the carelessness mistake in these programs；As prepare used by composition or execution method manufacture, source or The difference of the purity of ingredient；Etc. generable quantity variation.Term " about " is also covered due to obtaining from specific original mixture The different equilibrium conditions of the composition arrived and different amounts.Regardless of whether modified by term " about ", the claim amount of including etc. Jljl.

Although term first, second, third, etc. can be used herein come describe various component, assembly units, region, layer and/ Or part, but these component, assembly units, regions, layers, and/or portions should not be limited by these terms.These terms can be only used for One component, assembly unit, region, layer or part and another region, layer or part are distinguished.Used herein such as " One ", the term of " second " and other numerical terms do not imply that order or sequence, unless context is explicitly indicated.Therefore, exist In the case where the introduction for not departing from example embodiment, first element, component, region, layer or the part being discussed below can quilts Referred to as second element, component, region, layer or part.

For ease of description, such as "inner", "outside", " lower section ", " following ", "lower", " above ", "upper" can be used herein Deng spatially relative term the relationships of an elements or features and another elements or features as shown in the figure described.Space is opposite Term can be intended to also cover the different orientation of device in use or operation other than orientation discribed in figure.For example, such as Device in fruit figure is reversed, then the element for being described as be in other elements or features " following " or " lower section " will be oriented as Other elements or features " above ".Therefore, exemplary term " following " can cover two kinds of orientations above and below.Device can be according to it Its mode is orientated (be rotated by 90 ° or at other orientations), and is interpreted accordingly that space used herein is opposite to be described Word.

Above description to embodiment is to be provided for purposes of illustration and description.Be not intended to the disclosure into Row is exhaustive, or limitation.The independent component of specific embodiment, desired or described purposes or feature are typically not limited to this Specific embodiment, and interchangeable under usable condition, and can be used in selected embodiment (even if be not specifically illustrated or Description).Embodiment can also be varied in many ways.This variation example is not to be regarded as a departure from disclosure, and all this Modification is intended to be included in scope of disclosure.

Claims (9)

1. a kind of transformer, which includes primary coil, secondary coil and core, wherein the primary coil is branched off into packet Include at least two series of First Series and second series, which is characterized in that the First Series of the primary coil and institute Secondary coil intertexture is stated, and the second series of the primary coil do not interweave with the secondary coil.

2. transformer according to claim 1, which is characterized in that the intertexture is according to sandwich style deployment arrangements.

3. transformer according to claim 1, which is characterized in that the primary coil is branched off at least three series.

4. transformer according to claim 3, which is characterized in that the primary coil is branched off at least four series.

5. transformer according to any one of claims 1 to 4, which is characterized in that the First Series and described the Gap between two series is not wider than the coil width of the second series.

6. transformer according to claim 5, which is characterized in that the gap is not wider than the line of the second series Enclose the half of width.

7. transformer according to claim 6, which is characterized in that the gap is not wider than the line of the second series Enclose the one third of width.

8. transformer according to claim 7, which is characterized in that the gap is not wider than the line of the second series Enclose a quarter of width.

9. transformer according to claim 5, which is characterized in that the transformer is step-down transformer.