CN103035377B - Multiple coil magnetic structure - Google Patents

Abstract

A kind of in parallel Multiple coil magnetic structure, it includes magnetic core and multiple winding, and magnetic core limits the multiple magnetic flux paths by iron core, and multiple windings extend around part iron core.At least some in described winding positions adjacent to the periphery of this structure.This structure also includes electric conductor, and the described winding that electric conductor positions along the periphery of this structure and the periphery of this structure neighbouring extends.

Description

Multiple coil magnetic structure

Technical field

The present invention is open relates to Multiple coil magnetic structure.

Background technology

This part provides the background information relevant to the disclosure, and it is not necessarily prior art.

Transformator is the device that electric energy is sent to from a circuit another by the conductor of inductive.Inductive Conductor be coil or the winding of transformator.

In a form, transformator has two separate coils of electric current.These coils are commonly called armature winding Or secondary windings.Generally electric current is connected to the winding of energy source or the Circuits System that actively controls electrical quantity be appointed as primary around Group.Secondary windings is usually connected to energy receiver or passively in response to the winding of circuit of action of primary circuit.When So, specifying of primary/secondary is typically nonsensical for transformator itself, and is only for describing this transformator in entirety Effect played in circuit.Armature winding works in the way of identical with the cardinal principle of transformator with secondary windings.Such as exist In the case of having the transformator of identical primary coil and secondary coil, coil can be made to exchange, without to being connected to this The operation of the circuit (or multiple circuit) planting transformator produces any impact.Make the change with different primary coil and secondary coil The coil exchange of depressor can change voltage and current relation, but only can affect the Circuits System being connected, and transformator itself is also It is to work in the same way.It addition, armature winding can connect in the way of different from common transformer with secondary windings, make With etc. so that the term of primary and secondary becomes nonsensical (or may misunderstand).There is Multiple coil such as, In the case of the transformator of magnetic structure the most disclosed herein, term becomes more easily to misunderstand.Therefore, Use numeral to specify (replacement primary-secondary) generally for different windings herein.

Fig. 1 illustrates the two-winding transformer that overall by reference number 100 is pointed out, together with across transformator 100 around Voltage V1, V2 of organizing and electric current I1, I2 of the winding passing through transformator 100.In order to improve the energy transmission between winding, generally High magnetic (high magnetic permeability) material is used as transformer core 102.This iron core 102 provides the low magnetic through two windings for magnetic field Road blocking footpath so that nearly all magnetic field all by first coil and the second coil around.Two-winding transformer (such as, transformation Device 100) in voltage and electric current between relation by ratio (that is, the circle of number of turns N1 of the first winding and number of turns N2 of the second winding Number ratio) determine.This relation can be expressed as with mathematical way:

$\frac{V1}{V2}=\frac{-I2}{I1}=\frac{N1}{N2}...\left(1\right)$

Fig. 2 shows the example of the transformator 200 with more than two winding.This transformator is generally in public utilities Use in line frequency application (50/60Hz) and in high frequency switch mode power supply.Transformator 200 include being respectively provided with N1, N2, First winding, the second winding and the tertiary winding of N3 circle.Voltage across the first winding, the second winding and the tertiary winding is respectively V1, V2 and V3, and the electric current entering the first winding, the second winding and the tertiary winding is respectively I1, I2 and I3.Transformator 200 leads to It is commonly referred to as multiwinding transformer of connecting.

Relation between voltage and the electric current of transformator 200 (and there is other transformator of more than two winding) and double wrap Relation between voltage and the electric current of group transformator (such as, transformator 100) is different.Across transformator 200 whole three around The voltage of group is associated by number of turns ratio in the mode identical with two-winding transformer (such as, transformator 100).That is, voltage closes System is by following equality constraint:

$\frac{V1}{N1}=\frac{V2}{N2}=\frac{V3}{N3}...\left(2\right)$

But, the current relationship for two-winding transformer (such as, 100) represented in equation (1) is at transformator 200 In the case of be invalid.Electric current and the number of turns ratio of one of them winding known do not allow to determine the electric current of other winding.But, The ampere of all windings-number of turns product and be necessarily equal to zero.This rule is expressed as with mathematical way:

$\underset{k=1}{\overset{n}{\mathrm{\Σ}}}\mathrm{Ik}*\mathrm{Nk}=0...\left(3\right)$

Fig. 3 shows multiwinding transformer 300 in parallel.Transformator 300 includes being respectively provided with the first of N1, N2 and N3 circle Winding, the second winding and the tertiary winding.Voltage across the first winding, the second winding and the tertiary winding is respectively V1, V2 and V3, And it is respectively I1, I2 and I3 at the electric current of the section start of the first winding, the second winding and the tertiary winding.

The deterministic current relationship that multiwinding transformer 300 in parallel is characterised by between any two winding:

I1*N1=I2*N2=I3*N3 ... (4)

But, the voltage law for multiwinding transformer 300 in parallel reflects by more weak pass each other given below System:

$\underset{k=1}{\overset{n}{\mathrm{\Σ}}}\frac{\mathrm{Vk}}{\mathrm{Nk}}=0...\left(5\right)$

Transformator 300 may be used for exporting the controlled power supply of electric current (rather than output voltage) or for needing circuit Identical currents in multiple branch roads is distributed with the power supply operating or reducing stress more accurately.

The above-mentioned relation table of such as equation (2) to (5) understands series connection multiwinding transformer and multiwinding transformer in parallel Between difference.Owing to non-ideal characteristic is the most unrelated with the explanation of the difference between both structures, therefore these relations are not Impact including the various non-ideal characteristics of transformator.

In some application including such as frequency applications, a non-ideal characteristic of very important transformator is leakage Sense.Leakage inductance represents the energy not stored in the magnetic field of coupling between each winding.Leakage inductance manifests itself by such as non-coupled inductance Device is arranged in series with Transformer Winding.This inducer produces extra magnetic resistance, and it may interfere with the operation of circuit.

Various technology known about the transformator with low leakage inductance.These known technologies are typically based on iron core and winding Physical layout so that different windings arranges as far as possible near each other.For constructing the transformator with low leakage inductance wherein Two kinds of technology are to interleave winding and parallel winding of multiple coils group.In interleaving, winding is divided into the some arranged in layer alternately. In parallel winding of multiple coils group, the multi cord of insulation is utilized to be wound around more than one winding on iron core.

But, due to these technology need different windings is physically located on the same section of iron core, therefore this A little known technology for constructing low-leakage inductance transformer device are generally only applicable to multiwinding transformer of connecting.Owing to this physics connects Near incompatible with the structure of multiwinding transformer in parallel, therefore generally this physical access is not used for Multiple coil transformation in parallel Device.

Summary of the invention

This part provides general introduction rather than its four corner or the comprehensive disclosure of its whole features of present disclosure.

An aspect according to present disclosure, Multiple coil magnetic structure in parallel includes magnetic core and multiple winding, magnetic core Limiting the multiple magnetic flux paths by iron core, multiple windings extend around part iron core.At least some in described winding is neighbouring should The periphery location of structure.This structure also includes electric conductor, and electric conductor positions along the periphery of this structure and the periphery of this structure neighbouring Winding extend.

In the description provided from there, other side and the field of application will become clear from.Should be appreciated that the disclosure Various aspects can be implemented separately or can with one or more other sides combination implement.It is also understood that herein Description and concrete example be merely to illustrate, and be not intended to limit the scope of the present disclosure.

Accompanying drawing explanation

Accompanying drawing described herein is only used for the descriptive purpose of selected embodiment rather than all possible enforcement, and And be also not intended to limit the scope of the present disclosure.

Fig. 1 is the axonometric chart of two winding transformers of prior art.

Fig. 2 is the axonometric chart of prior art series connection multiwinding transformer.

Fig. 3 is the axonometric chart of prior art parallel connection multiwinding transformer.

Fig. 4 is the solid of the exemplary iron core for the Multiple coil electromagnetic structure in parallel according to an aspect of this disclosure Figure.

Fig. 5 is the cross-sectional view of a part for the Multiple coil magnetic structure exemplary in parallel of the iron core including Fig. 4.

Fig. 6 is the axonometric chart of the Multiple coil magnetic structure exemplary in parallel according to disclosure various aspects.

Fig. 7 is the cross-sectional view of a part for the Multiple coil electromagnetic structure in parallel of Fig. 6.

Fig. 8 is the front view of the Multiple coil magnetic structure exemplary in parallel according to disclosure various aspects.

Fig. 9 is the cross-sectional view of a part for the Multiple coil magnetic structure in parallel of Fig. 8.

Figure 10 is the cross section of a part for the Multiple coil magnetic structure exemplary in parallel illustrating the winding according to the disclosure Figure, it is wound around in the way of different from the winding in the Multiple coil magnetic structure in parallel of Fig. 9.

Figure 11 is the cross section of a part for the Multiple coil magnetic structure exemplary in parallel illustrating the winding according to the disclosure Figure, it is wound around in the way of different from the winding in the Multiple coil magnetic structure in parallel of Fig. 9 and Figure 10.

Figure 12 A to Figure 12 F is cutting of the various column configurations of the iron core for the Multiple coil magnetic structure in parallel according to the disclosure Face figure.

Figure 13 is to have eight posts for the Multiple coil magnetic structure exemplary in parallel according to various aspects of the disclosure The axonometric chart of iron core.

Figure 14 is the cross-sectional view of a part for the Multiple coil magnetic structure in parallel of the iron core including Figure 15.

Figure 15 is the exemplary ferrum with 16 posts of the Multiple coil magnetic structure in parallel for the aspect according to the disclosure The axonometric chart of core.

Figure 16 is to include that the iron core of Figure 15 and the Multiple coil magnetic structure in parallel of 16 windings are in the feelings removing iron core top Plan view from above under condition.

Figure 17 is the Multiple coil magnetic structure in parallel of Figure 16 axonometric chart in the case of iron core top is in place.

Figure 18 is to have eight posts and chamfer heads in the Multiple coil magnetic structure in parallel of the aspect according to the disclosure And the axonometric chart of the exemplary iron core of bottom.

Figure 19 is the side plan view of the exemplary iron core of Figure 18.

Figure 20 is the cross-sectional view of a part for the Multiple coil magnetic structure in parallel of the iron core including Figure 18.

Figure 21 A is the sectional view of the Multiple coil magnetic structure in parallel of the Figure 15 to Figure 17 illustrating magnetic field.

Figure 21 B be illustrate magnetic field have electric conductor and include the iron core of Figure 15 to Figure 17 and winding in parallel many around The sectional view of group magnetic structure.

Figure 22 is to have electric conductor and include the vertical of the iron core of Figure 15 to Figure 17 and the Multiple coil magnetic structure in parallel of winding Body figure.

Figure 23 is the partial cross section view of the Multiple coil magnetic structure in parallel of Figure 22.

Figure 24 is the partial cross section view of the Multiple coil magnetic structure in parallel with electric conductor according to illustrative embodiments.

Figure 25 is the partial cross sectional of the Multiple coil magnetic structure in parallel with electric conductor according to another exemplary embodiment Face figure.

Figure 26 is the partial cross sectional of the Multiple coil magnetic structure in parallel with electric conductor according to another exemplary embodiment Face figure.

Figure 27 A to Figure 31 is the circuit of the Multiple coil magnetic structure in parallel with electric conductor according to illustrative embodiments Figure.

Figure 32 A to Figure 32 I is for the Multiple coil magnetic structure in parallel with electric conductor according to illustrative embodiments The sectional view of the various column configurations of iron core.

Figure 33 is the sectional view of two the Multiple coil magnetic structures with electric conductor according to illustrative embodiments.

Running through the multiple views in accompanying drawing, corresponding reference points out corresponding part.

Detailed description of the invention

It is described more fully with illustrative embodiments now with reference to accompanying drawing.

Offer illustrative embodiments is so that the disclosure is detailed, and will pass on it to those skilled in the art comprehensively Scope.Elaborate multiple details of the example of such as concrete parts, apparatus and method, in order to provide the embodiment party of the disclosure The detailed understanding of formula.It will be apparent to those skilled in the art that without using detail, can be with multiple different Form implements illustrative embodiments, and detail and illustrative embodiments are not construed as limiting the model of the disclosure Enclose.In some illustrative embodiments, do not describe known processes, well known device structure and known technology in detail.

Term used herein is only for describing the purpose of specific illustrative embodiment, and is not intended to limit System.Unless clearly dictated otherwise in context, singulative the most used herein " ", " a kind of " and " being somebody's turn to do " are the most gratifying In including plural form.Term " comprises ", " including " and " having " is inclusive, and therefore indicates the spy described in existence Levy, integer, step, operation, element and/or parts, but do not preclude the presence or addition of one or more further feature, whole Number, step, operation, element, parts and/or a combination thereof.Unless be specifically identified as execution sequence, method the most described herein Step, process and operation should not be construed as being necessarily required to discuss or the particular order execution of diagram.It is also understood that permissible Use extra or alternative step.

When element or layer be referred to as other element or layer " on " or " being bonded to ", " being connected to ", " being attached to " Other element or layer, then it can be directly on other element or layer or engage, connect, be attached to other unit Part or layer, or there is middle element or layer.On the contrary, when element be referred to as " directly existing " other element or layer " on " Or " be spliced directly to ", element that " being connected directly to ", " being attached directly to " are other or layer, the most there is not the element of centre Or layer.In order to describing other word of the relation between element and should carry out in a similar manner understanding (such as " it is positioned at ... Between " with " be located immediately at ... between ", " adjacent " and " direct neighbor " etc.).As used herein, term "and/or" Including the listed item being associated one or more in any one and all combinations.

Although being used here term first, second, third, etc. to describe multiple element, parts, region, layer and/or portion Point, but these elements, parts, region, layer and/or part should not be restricted by these terms to be limited.These terms are only used for one Individual element, parts, region, layer or part are different from other region, layer or part.Unless explicitly pointed out by context, otherwise The such as term of " first ", " second " and the term of other numerical do not imply that order or order when being used herein as.Therefore, First element discussed below, parts, region, layer or part are properly termed as the second element, parts, region, layer or part, and Teaching without departing from illustrative embodiments.

Here for be easy to description can use such as " interior ", " outward ", " below ", " lower section ", D score, " top ", " on " Deng space relative terms one element of diagram or feature and other element or the relation of feature are described in figure.Except figure In beyond the orientation drawn, space relative terms can be intended to include device being differently directed in use or operation.Such as, as The really upset of the device in figure, then be described as other element or feature " lower section " or " below " element then will be oriented in it Its element or feature " top ".Therefore, exemplary term " lower section " can include above and below two orientations.Device can be with Alternate manner orientation (half-twist or be in other orientation), and spatial correlation used herein describes language and should make accordingly Understanding.

Present disclosure describes Multiple coil parallel connection magnetic structure and the method for this structure of designing for manufacturing.Described herein Structure and technology may be used for Multiple coil shunt transformer, Multiple coil parallel inductor (such as, non-isolated magnetic structure), chokes Circle (such as, being designed to carry the inducer that big DC (direct current) biases) and autotransformer are (such as, in the situation being not provided with isolation Under changed the transformator of current/voltage relation by inductive).In the disclosure, term Multiple coil parallel connection magnetic structure will In order to contain any or all in these structures.Technology disclosed herein can be used alone or make in any combination With, the Multiple coil magnetic structure in parallel needed for producing.

Low leakage inductance in Multiple coil magnetic structure in parallel can be by reducing the portion being associated with only one winding in magnetic field The amount of the energy stored in point realizes.This can come by substantially making the volume minimization in the space occupied by non-coupled field Realize.

According to an aspect of this disclosure, in order to reduce the leakage inductance of Multiple coil magnetic structure in parallel so that for the face of iron core The long-pending ratio with the area for winding substantially maximizes.Example in conjunction with this aspect illustrates in figures 4 and 5.

In the embodiment of the Multiple coil magnetic structure in parallel understood according to this aspect, the magnetic resistance by the magnetic circuit of iron core can If this can be significantly less than than the most maximized situation.The field being present in iron core is tended to main by the other parts of iron core Flowing, and other coil will be coupled in.In the transformator of standard, the area approximation of iron core and winding is equal, and excellent Turn to minimize so that the summation of core loss and winding loss.Embodiment party in the Multiple coil magnetic structure in parallel according to this aspect In formula, the ratio of core area and winding area is increased to the point of abundant coupling.This can realize in the following way, it may be assumed that Be designed so that iron core for single winding provide the part (being herein sometimes referred to as " post ") of magnetic circuit have big cross-sectional area, Make the space for winding between post (being herein sometimes referred to as " window " or " winding window ") substantially minimize simultaneously.By this side Formula, is mainly coupled in a winding window rather than the volume minimization in the space of other window by what magnetic field occupied.

In one embodiment, the iron core width for single coil is at least the twice of winding window width.Separately In one embodiment, the ratio of iron core width and winding window width is at least three.In another embodiment, iron core width and winding The ratio of window width is at least four.The ratio of iron core width and winding window width is not limited to any ratio described herein, but can To be greater than or to be less than any ratio of ratio represented herein.It addition, for the iron core of any one coil and for this line The ratio of the width of the winding window of circle can be same or different from the iron core for arbitrarily other coil and the winding for this coil The ratio of window width.

Fig. 4 illustrates the exemplary iron core 402 for Multiple coil magnetic structure in parallel.Iron core 402 includes three post 404A To 404C (sometime collectively referred to as post 404) and two winding window 406A, 406B (sometime collectively referred to as winding window 406).Post 404 is partly Limit window 406.Such as, the width of winding window 406A is limited by the distance between the opposite flank of post 404A and post 404B.Similar Ground, the width of winding window 406B is limited by the distance between the opposite flank of post 404B and post 404C.

Iron core 402 includes iron core top 408 and mandrel bottom 410.Iron core top 408 is positioned at above winding post 404, and And limit the top of winding window 406.Mandrel bottom 410 is positioned at below post 404, and limits the bottom of winding window 406.Iron core Top 408 and mandrel bottom 410 can be integrally formed with post 404, can be the portion being separately formed being attached to post 404 Point or both combination (such as, in iron core top 408 and mandrel bottom 410 can be integrally formed with post 404, And another in iron core top 408 and mandrel bottom 410 can be separately formed and be attached to post 404).Similarly, iron core Top 408 and mandrel bottom 410 can be single integrally formed part respectively, or can be by more than one parts, layer Deng structure.

In the iron core 402 of Fig. 4, the width of post 404 is relatively large with the ratio of the width of winding window 406.Exemplary at this In embodiment, this is (that is, the width of each post 404 is about four times of width of each winding window 406) than about four.

Fig. 5 illustrates the cross section of a part for the Multiple coil magnetic structure 500 in parallel according to another exemplary embodiment Figure.Structure 500 includes iron core 502 and winding 512.The iron core 402 that iron core 502 is similar in Fig. 4, but there is different ratios. Iron core 502 includes post 504A, 504B and window 506A to 506C.Iron core top 508 is positioned at above post 504, and limits winding The top of window 506.Mandrel bottom 510 is positioned at below post 504, and limits the bottom of winding window 506.Winding 512A is around post 504A is wound around, and through winding window 506A and 506B.Winding 512B is wound around around post 504B, and through winding window 506B and 506C.In the detailed description of the invention of Fig. 5, the width of post 504 is about two with the ratio of the width of window 506.

According to another aspect of the present disclosure, it should make Multiple coil magnetic structure in parallel adjacent windings winding between distance Substantially minimize.By winding as far as possible near being provided with the leakage inductance helping reduce Multiple coil magnetic structure in parallel each other.

According to another aspect, it should make the distance between winding and iron core (post and iron core top and mandrel bottom) substantially Minimize.Such as, the height of winding can cover the height of iron core column in such a way, it may be assumed that at the top of winding Yu iron core Part and base section between space-minimized.

Latter two aspect can realize in the following way, it may be assumed that by between different windings and between winding and iron core Distance remain only big as the distance needed for suitable insulation.Fig. 6 and Fig. 7 illustrates and combines this latter two side The illustrative embodiments in face.

Fig. 6 illustrates an exemplary Multiple coil magnetic structure 600 in parallel.Multiple coil magnetic structure 600 in parallel includes iron core 602 and winding 612A to 612C.Iron core includes post 604A to 604C, iron core top 608 and mandrel bottom 610.Relative post 604, iron core top 608 and mandrel bottom 610 jointly limit winding window 606A, 606B (being referred to as winding window 606).Such as, Relative post 604A and 604B jointly limits winding window 606A together with iron core top 608 and mandrel bottom 610.Similarly, often Individual winding 612A to 612C all in post 604A to 604C are wound around and through at least one winding window 606.

Fig. 7 illustrates the Multiple coil magnetic knot in parallel with iron core 702 and winding 712 according to another exemplary embodiment The cross-sectional view of a part for structure 700.The iron core 602 that iron core 702 is similar in Fig. 6, but there is the winding window (figure of varying number Wherein three are shown).Iron core 702 includes post 704A, 704B and winding window 706A to 706C.Iron core top 708 is positioned at post 704 Above, and limit the top of winding window 706.Mandrel bottom 710 is positioned at below post 704, and limits the end of winding window 706 Portion.Winding 712A is wound around around post 704A, and through winding window 706A and 706B.Winding 712B is wound around around post 704B, and warp Cross winding window 706B and 706C.

As in figure 6 and figure 7 it will be seen that each winding 612,712 of Multiple coil magnetic structure 600,700 in parallel has phase The adjacent distance substantially minimized between winding 612A/612B, 612B/612C, 712A/712B, and there is winding 612,712 And the distance substantially minimized between iron core 602,702.Winding 612,712 occupy its process each winding window 606, The substantially the entirety of height of 706.It addition, through different windings (such as, the winding of identical winding window (such as, winding window 706B) 712A and 712B) draw close (that is, the distance substantially minimized presenting between winding 712).

By Multiple coil magnetic structure 600,700 in parallel is contrasted with the transformator 300 in such as Fig. 4, can be clearly Find out the foregoing aspects of combination in Multiple coil magnetic structure 600,700 in parallel.In transformator 300, winding is with the biggest distance Separated from one another.

According to another aspect of the present disclosure, the winding of Multiple coil magnetic structure in parallel utilizes two-wire (intercoil between coil Bifilar) technology is wound around.This new winding technology can reduce the amount of the energy in non-coupled magnetic field, and the most permissible Reduce the leakage inductance of Multiple coil magnetic structure in parallel.The adjacent windings with multiple circle makes their winding arrange in an alternating fashion (such as, from the top of winding window to bottom, from the side of winding window to side etc.).Utilizing two-wire technology between coil, winding can To replace with from coil to coil (turn by turn), or can with the group more than a circle alternately.Illustrating combination in Fig. 8 to Figure 11 should Each embodiment of the Multiple coil magnetic structure in parallel of aspect.

In Fig. 8, Multiple coil magnetic structure 900 in parallel includes iron core 902 and winding 912A to 912C.Iron core includes post 904A extremely 904C, iron core top 908 and mandrel bottom 910.Relative post 904, iron core top 908 and mandrel bottom 910 jointly limit Winding window 906A, 906B.Each winding 912A to 912C is wound around around post, and through at least one winding window 906.As schemed Showing, each winding 912 replaces in the winding window 906 that they are shared with another winding 912 on the basis of from coil to coil.Fig. 9 is also The cross-sectional view of a part of connection Multiple coil magnetic structure 900, it is shown that the winding 912A in iron core 902 and window 906A and 912B.Fig. 9 also illustrates by by flowing through two magnetic fields 914 produced by the electric current of winding 912A.As it can be seen, it is double between coil Line winding can aid in and reduces by the volume in the space being coupled in occupied by the magnetic field of only one winding.

Figure 10 and Figure 11 illustrates the cross-section parts of the structure 1000,1100 according to another exemplary embodiment.And Connection Multiple coil magnetic structure 1000,1100 illustrates bifilar wound technology some possible variants between coil.In Fig. 10, and Connection Multiple coil magnetic structure 1000 winding 1012A, 1012B both from the top of winding window 1006 to bottom, also from winding window 1006 Side replace to side.Multiple coil magnetic structure 1100 in parallel include in the way of one group of two circle from the top of winding window 1106 to Bottom winding 1112A, 1112B alternately (rather than as occur in the Multiple coil magnetic structure in parallel of Fig. 8 and Fig. 9 at from coil to coil On the basis of alternately).

Exemplary Multiple coil magnetic structure (such as 500,600,700,900,1000,1100) in parallel discussed above is the biggest Illustrate with reference to three windings and discuss on body.But, teaching (including teaching described above and below) disclosed herein can To use in the Multiple coil magnetic structure in parallel have more than three winding.Some other aspects of the disclosure described below To illustrate with reference to more than three winding and/or discuss.Should be appreciated that each in aspect above and aspect hereafter May be incorporated for (individually or in any combination) has the Multiple coil magnetic structure in parallel of any an appropriate number of winding.

Another further aspect according to the disclosure, it should make the volume of Multiple coil magnetic structure in parallel and the iron core occupied by winding Volume is compared and is the most substantially minimized.

To achieve it, the gross area of iron core in a horizontal plane can be split to make between single winding Ratio between core area and winding area maximizes.In other words, for given core area, it should make the length of winding Littleization.The non-rectilinear being arranged close to own (or as much as possible) other winding if, with the most each winding arranges generation For straight line (as such as shown in Fig. 4 to Figure 11, all windings are in line), then can realize this point.Figure 12 A is to figure 12F illustrates multiple illustrative embodiments that explanation combines the configuration of this aspect.Each of which in Figure 12 A to Figure 12 C Plan view from above for the iron core (in the case of iron-core-free top) of the Multiple coil magnetic structure in parallel for four windings.Such as, In fig. 12, iron core is to have four square posts to be wound around the square iron core of winding on it.Similarly, Figure 12 B is to have four triangular columns to be wound around the square iron core of winding on it.Figure 12 C is to have four fans The circular iron core of shape post.Figure 12 D to Figure 12 F illustrates the exemplary iron core structure of the Multiple coil magnetic structure in parallel for 12 windings Type.Certainly, more or less of winding can be used in any concrete application, and combines other change of the configuration of this aspect Body is also in the scope of the present disclosure.Other embodiment in conjunction with this aspect includes the iron core 1202 of Figure 13, the iron core of Figure 15 The iron core 1502 of 1402 and Figure 18.

In the exemplary Multiple coil magnetic structure of combine this aspect one, structure include magnet, magnet include the first post, Two posts and the 3rd post.Each of which in first post, the second post and the 3rd post has center.First post and the second post are spaced Open the first side of the first winding window and the second side being limited between the first post and the second post.3rd post and the first post and Spaced apart second winding to be limited between the one in the 3rd post and the first post and the second post in second post First side of window and the second side.First post, the second post and the 3rd post are positioned relative to into and make the single straight line cannot Center through whole three posts.Iron core includes being positioned at the above of the first post, the second post and the 3rd post and limiting the first winding Window top and the iron core top at the second winding window top.Iron core also includes being positioned at below the first post, the second post and the 3rd post also And limit the mandrel bottom bottom the first winding window and bottom the second winding window.Multiple coil magnetic structure includes first around the first post Winding, the second winding around the second post and the tertiary winding around the 3rd post.

According to another aspect, it is present in the magnetic field in the top section of the iron core of Multiple coil magnetic structure in parallel and base section Should be through the part being positioned within winding of iron core.Should make between winding and profile (such as, the periphery, outer of iron core Edge etc.) magnetic field in outside space substantially minimizes.The exemplary reality of this aspect will be combined with reference to Figure 13 to Figure 17 discussion Execute mode.

For realizing this point, can be by not allowing iron core top and mandrel bottom substantially at the wheel of winding post of iron core Magnetic circuit reluctance on the wide outer periphery making iron core protruding above substantially maximizes.Therefore, along the winding portion of iron core periphery (that is, around the winding of Zhou Bianzhu) is divided not covered by iron core top and the mandrel bottom along iron core periphery.In one embodiment, Iron core top and mandrel bottom with less than periphery winding the half of width of winding window of process protruding above at periphery winding.

Figure 13 and Figure 14 illustrates the illustrative embodiments of the Multiple coil magnetic structure 1200 in parallel combining this aspect.And Connection Multiple coil magnetic structure 1200 includes that iron core 1202, iron core 1202 have eight posts 1204 (in fig. 13 it can be seen that wherein five Individual).Iron core includes post 1204, iron core top 1208 and mandrel bottom 1210.Relative post 1204, iron core top 1208 and iron core Bottom 1210 jointly limits winding window 1206.Winding 1212 is wound around around each post 1204.In order to illustrate further feature, winding 1212 is the most not shown.But, figure 14 illustrates two windings 1212A, 1212B.Each winding 1212 is around post 1204 are wound around, and through at least one winding window 1206.In fig. 14 it will be seen that iron core top 1208 and mandrel bottom 1210 not the periphery of Multiple coil magnetic structure 1200 in parallel be in winding 1212 protruding above (or below winding 1212 prominent Go out).Figure 14 illustrates the magnetic field 1214 produced by the electric current flowing through winding 1212.At the bottom of iron core top 1208 and iron core Portion 1210 does not extends in winding 1212 above/below, therefore compared with the iron core extended in its winding above/below, permissible The magnetic resistance in the path, field on increase Multiple coil magnetic structure 1200 periphery in parallel.The magnetic resistance of this increase improves between winding 1212 Coupling, and reduce the leakage inductance of structure 1200.

Another exemplary parallel connection Multiple coil magnetic structure 1400 is shown in Figure 15 to Figure 17.Multiple coil magnetic structure in parallel 1400 include that iron core 1402, iron core 1402 have 16 posts 1404 (in fig .15 it can be seen that wherein seven).Iron core 1402 Including post 1404, iron core top 1408 and mandrel bottom 1410.Relative post 1404, iron core top 1408 and mandrel bottom 1410 Jointly limit winding window 1406.Winding 1412 is wound around around each post 1404.Winding 1412 is the most not shown.Each winding 1412 are all wound around around post 1404, and through at least one winding window 1406.In fig. 17 it will be seen that iron core top 1408 He It is protruding above that mandrel bottom 1410 is not in winding 1412 at Multiple coil magnetic structure 1400 periphery in parallel.

Additionally or alternatively, iron core top and/or the mandrel bottom of Multiple coil magnetic structure in parallel can make them Edge cut sth. askew, in order to contribute to making the magnetic field in the space outside iron core minimize.

The Multiple coil magnetic in parallel of the mandrel bottom including the iron core top cut sth. askew and cut sth. askew is illustrated in Figure 18 to Figure 20 The illustrative embodiments of structure 1500.Multiple coil magnetic structure 1500 in parallel includes that iron core 1502, iron core 1502 have eight posts 1504.Iron core includes post 1504, iron core top 1508 and mandrel bottom 1510.Relative post 1504, iron core top 1508 and ferrum Bottom core, 1510 jointly limit winding window 1506.Winding 1512 is wound around around each post 1504.Winding 1512 is at Figure 18 and Figure 19 Not shown in.Illustrate two windings 1512A, 1521B in fig. 20.Each winding 1512 is wound around around post 1522, and passes through At least one winding window 1506.

Iron core top 1508 has core 1516, and core 1516 has the thickness of constant.Core The thickness of 1516 generally limits the thickness at iron core top 1508.The thickness at iron core top 1508 is from the periphery of core 1516 The outward flange 1522 at 1520 to iron core top 1508 reduces.

Mandrel bottom 1510 has core 1518, and core 1518 has the thickness of constant.Core The thickness of 1518 generally limits the thickness of mandrel bottom 1510.The thickness of mandrel bottom 1510 and cut sth. askew can be with iron core top 1508 is identical or different.The thickness of mandrel bottom 1510 is from the outside of periphery 1524 to the mandrel bottom 1510 of core 1518 Edge 1526 reduces.

Illustrate the magnetic field 1514 produced by the electric current flowing through winding 1512 in fig. 20.Compared with other structure, due to Cutting sth. askew of iron core top 1508 and mandrel bottom 1510, therefore reduces the non-coupled magnetic field of Multiple coil magnetic structure 1500 in parallel The volume of 1514.The magnetic resistance of the increase in the path, field on the periphery of Multiple coil magnetic structure 1500 in parallel can improve winding 1512 Between coupling, and reduce the leakage inductance of Multiple coil magnetic structure 1500 in parallel.

Can cut sth. askew with identical angle or different angles with mandrel bottom in iron core top.At the bottom of iron core top and iron core The angle that portion carries out cutting sth. askew can be any suitable angle.In some embodiments, the angle cut sth. askew is at least 15 ° and little In about 75 °.Angle on all sides of iron core top and/or mandrel bottom can be identical.Alternately, iron core top or Can cut sth. askew with the angle different from other sides one or more in one or more sides of mandrel bottom.Although scheming in the drawings It is shown as directly the cutting sth. askew of thickness reducing iron core top/bottom in a linear fashion, but iron core top and mandrel bottom can be with differences Profile cut sth. askew (such as, convex surface is cut sth. askew).

For Multiple coil magnetic structure the most in parallel disclosed herein iron core (such as, 402,502,602,702,902, 1202,1402,1502) can be by the most suitable magnetic material or include such as ferrite, iron powder, amorphousmetal, layer The material of compressed steel, laminated iron, carbonyl iron, soft iron etc. is made.Iron core can be integrally formed (that is, iron core top, mandrel bottom and Post can be one piece) or iron core can be constructed by two or more separate part, layer, materials etc..Magnetic material Can be single magnetic material, composite etc..

For Multiple coil magnetic structure the most in parallel disclosed herein (such as, 500,600,700,900,1000,1100, 1200,1400,1500) winding can be made up of the most suitable material.Such as, winding can be by metal wire or by metal Sheet (such as, by cutting, punching press etc.) is made.The metal of line or sheet can be the most suitable metal or include such as copper The combination of metal.Winding can also be formed as the cabling on printed circuit board (PCB) or on flexible circuit.In order on PCB around Group generates more than a circle, can use multiple in the case of pathway (vias) suitably connects the cabling on adjacent layer Layer.

And, for all Multiple coil magnetic structures in parallel disclosed herein (such as, 500,600,700,900,1000, 1100,1200,1400,1500), the area of single winding can be identical or different.Individually the number of turns of winding can phase With or can be different.Individually winding can be connected to separate circuit, or is connected to each other with various combinations.

Include not along structure iron core periphery arrange post embodiment (in such as, at Figure 15 to Figure 17 also Connection Multiple coil magnetic structure 1400) in, can via at iron core top, mandrel bottom or the hole on both realize with around inner prop The input/output of winding connects.

Multiple coil magnetic structure in parallel described herein is (such as, 500,600,700,900,1000,1100,1200,1400, 1500) may be used for isolation applications or non-isolated application.They can be used for relating generally to change energy (such as, transformation Device), energy storage (such as, inducer) or both application.They can also be designed to (such as, make with big DC offset operation Operate for choke coil).Multiple coil magnetic structure in parallel can comprise the air gap in magnetic circuit or can omit this air gap.

Figure 21 A illustrates the Multiple coil magnetic structure 1400 in parallel of Figure 15 to Figure 17, which illustrates magnetic field.Structure 1400 includes There is the inner prop 1404A of winding 1412A (that is, interior winding) and there is the column jacket of winding 1412B (that is, outer winding).Although interior around Group 1412A is surrounded by adjacent winding (such as, adjacent interior winding 1412A or adjacent outer winding 1412B), but outer winding 1412B is only surrounded by adjacent windings section.

When electric current 1418A, 1418B flow through interior winding 1412A and outer winding 1412B, produce magnetic field.In inner prop 1404A Magnetic field (such as, magnetic field 1414A) there is the closed path via adjacent inner prop.Induct in adjacent interior winding in these magnetic fields Go out voltage, and this voltage and then produce faradic current in described adjacent interior winding.If interior winding 1412A has low magnetic Resistance, then faradic current will generally mate with the faradic current in adjacent interior winding.Although it addition, not shown, by adjacent around The additional field that faradic current in group produces will be substantially balanced out the magnetic field (such as, magnetic field 1414A) initially produced, thus reducing Magnetic flux density in iron core.

In turn, the magnetic field in column jacket 1404B (such as, magnetic field 1414B) some parts (that is, magnetic field from structure 1400 outwardly directed parts) not there is the path via adjacent pillars.These magnetic fields are non-coupled magnetic field.Therefore, non-coupled magnetic Field (such as, magnetic field 1414B) does not generate voltage and current in adjacent winding, and then will not generate extra magnetic ?.Therefore, the magnetic field that some in column jacket 1404B initially produce will not be offset.

For the sake of clarity, it is illustrated that the two lines of the magnetic field 1414B flowing through column jacket 1404B of an outer winding 1412B Eight lines with the magnetic field 1414A flowing through inner prop 1404A of interior winding 1412A.Should be it is clear that these lines represent along each The length of corresponding winding is for magnetic field produced by each outer winding and each interior winding.

It addition, the electric current 1418A flowing through each interior winding 1412A is in relative direction with the electric current flowing through adjacent winding On.What this characteristic caused current balance and non-coupled magnetic field minimizes (as mentioned above).On the contrary, as shown in Figure 21 A, each A part of outer winding 1412B does not have the adjacent winding that electric current flows in an opposite direction.

Furthermore, it is possible to realize the difference of the amplitude of electric current 1418A, 1418B of flowing in winding 1412A, 1412B.Should Difference violates constant ampere-number of turns product rule (equation 3 above).Difference in electric current may by incompletely coupling, across Difference in the amount of the magnetic flux between the most different windings, guide difference in the reluctance path by different windings (especially by around Different distance between group causes) and/or caused by the difference in the loop area of each winding cincture.

(such as, magnetic field 1414B) is less desirable in non-coupled magnetic field, this is because: constant ampere-number of turns product rule (equation 3 above) becomes relatively inaccuracy；Depend between each winding and winding with exciting current of its physical location Faradic current difference bigger；Clean AC (exchange) magnetic flux density in iron core increases, and therefore increases core loss；Energy storage In non-coupled magnetic field, therefore promote the leakage inductance in structure；The bandwidth of the system using this structure may be reduced；With this structure Adjacent space is filled with non-coupled magnetic field, therefore produces possible electromagnetic interference (hereinafter referred to as in the system using this structure " EMI ") problem；Air gap may be needed to prevent the excessive imbalance in non-coupled Distribution of Magnetic Field, therefore make manufacture complicated；And The size that may must increase structure processes the imbalance in non-coupled magnetic field with permission.

In order to reduce amplitude difference and the effect in non-coupled magnetic field of the electric current flowed in the windings, can be along the week of structure While arrange electric conductor.Such as, Multiple coil magnetic structure in parallel can include the magnetic core limiting the multiple magnetic flux paths by iron core And multiple windings of the part extension around iron core.The periphery location of at least some proximity structure in described winding.This structure Also including electric conductor, the winding that electric conductor positions along the periphery of this structure and the periphery of this structure neighbouring extends.

Figure 21 B illustrates the illustrative embodiments of Multiple coil magnetic structure 2100 in parallel.Structure 2100 uses and in Figure 17 Illustrate and identical iron core 1402 mentioned above and winding 1412 configuration.Electric conductor 2116 is along the periphery of structure 2100 and proximity junction The winding 1412A of the periphery location of structure 2100 extends.Electric conductor 2116 can form closed-loop path around structure 2100.

As illustrated in fig. 21b, each winding 1412 be respectively provided with in adjacent winding flowing electric current (such as, 2118B) phase To the electric current (such as, 2118A) that flows up of side.Determine additionally, electric conductor 2116 has at the periphery with proximity structure 2100 The electric current 2118C that in each winding 1412A of position, electric current (such as, 2118D) the relative side of flowing flows up.Electric conductor Approximation is matched with the amplitude of the electric current in winding 1412 by the amplitude of the electric current 2118C in 2116.It addition, because structure 2100 is Parallel-connection structure, so the electric current approximately the same (assuming that the number of turns is identical) in all windings 1412.Therefore, the electricity in electric conductor 2116 Stream 2118C is by the electric current of the equilibrium all windings 1412 on structure 2100 periphery.

The electric current flowing through each winding 1412 and the electric current 2118C flowing through electric conductor 2116 produce magnetic field.In order to understand See, it is illustrated that the two lines in the magnetic field 2114 of a winding and the two lines in the magnetic field 2120 of electric conductor 2116.Should show and easy Seeing, these lines represent along the length of each winding and the length of electric conductor for magnetic field produced by each winding and electric conductor. As illustrated in fig. 21b, the magnetic field 2114 of the winding 1412A that the magnetic field 2120 of electric conductor 2116 positions with the periphery of proximity structure 2100 Compare and flow in an opposite direction.Therefore, the magnetic field 2120 of electric conductor 2116 is substantially balanced out the magnetic field 2114 of winding 1412A.

In the case of not carrying out physical contact with winding 1412A, electric conductor 2116 may be positioned such that as far as possible near around Group 1412A.Alternately, electric conductor 2116 can position with any appropriately distance away from winding 1412A.

Additionally, the width of electric conductor 2116 can be identical with the width of winding 1412.Alternately, electric conductor 2116 is permissible It is wider or narrower than winding 1412.

Figure 22 and Figure 23 illustrates the another exemplary embodiment of Multiple coil magnetic structure 2200 in parallel.Figure 23 is Figure 22 The partial cross section view of structure 2200.The structure 2200 of Figure 22 and Figure 23 uses and is similar to as illustrated and mentioned above in Figure 21 B Iron core 1402 and winding 1412 configuration.

Structure 2200 also includes multiple electric conductor 2216A, 2216B, and multiple electric conductor 2216A, 2216B are along structure 2200 The winding 1412A of the periphery location of periphery and proximity structure 2200 extends.As shown in Figure 22 and Figure 23, multiple electric conductor 2216A, 2216B is separated from one another by winding 1412A.That is, winding 1412A is positioned between electric conductor 2216A and electric conductor 2216B. Electric conductor 2216A and electric conductor 2216B can form the parallel path of the periphery extension around structure 2200.

Figure 24 to Figure 26 illustrates the illustrative embodiments of a part for Multiple coil magnetic structure in parallel.Figure 24 to Figure 26 institute The each structure shown all uses and such as diagram and identical iron core 1402 configuration mentioned above in Figure 21.As Figure 24 to Figure 26 institute Showing, each structure also includes the winding with multiple circles of the part extension around iron core 1402.Each winding all can use class It is similar to such as diagram and winding configuration mentioned above in Figure 21 B.It will be appreciated, however, that each structure may each comprise multiple tool There is the winding of one or more circle.

Figure 24 illustrates a part for Multiple coil magnetic structure 2400 in parallel.As shown in figure 24, multiple electric conductor 2416A are extremely 2416C is separated from one another by the winding 2412 of the periphery location of proximity structure 2400.Winding 2412 is positioned at top electric conductor Between 2416A and bottom electric conductor 2416B.It addition, middle electric conductor 2416C is positioned between the circle of winding 2412.Therefore, knot Structure 2400 includes the winding 2412 of the periphery location of proximity structure 2400, and each winding has with multiple electric conductor 2416A extremely Multiple circles that 2416C interleaves.It addition, as shown in figure 24, multiple electric conductor 2416A to 2416C and the periphery of proximity structure 2400 Whole multiple circles of the winding (such as, winding 2412) of location interleave.With the interleaving multiple electric conductor 2416A of winding 2412 extremely 2416C can reduce the amount in the non-coupled magnetic field of existence further.

Figure 25 illustrates a part for Multiple coil magnetic structure 2500 in parallel.Structure 2500 can include multiple electric conductor 2516A to 2516D, multiple electric conductor 2516A to 2516D position along the periphery of structure 2500 and the periphery of proximity structure 2500 Winding 1412A extends.As shown in figure 25, structure 2500 includes four electric conductor 2516A to 2516D, but can use more Or less electric conductor.For example, it is possible to only with three electric conductors (such as, electric conductor 2516A to 2516C or electric conductor 2516A、2516B、2516D)。

Multiple electric conductor 2516A to 2516D can be electrically connected to each other.Such as, conductor can along the whole length of conductor or One or more parts of conductor connect in the way of in series or in parallel.Additionally, the quantity in path in parallel or in series Can be identical around the whole periphery of structure 2400, or it can also change.

Electric conductor 2516A that as shown in figure 25, multiple electric conductor 2516A to 2516D include extending in this first plane, 2516B and one or more electric conductor 2516C, 2516D of extending in the second plane be perpendicular to the first plane.First In plane extend electric conductor 2516A, 2516B can by the second plane extend one or more electric conductor 2516C, 2516D is electrically connected to each other.Therefore, winding 1412A can by electric conductor 2516A to 2516D around.

Figure 26 illustrates a part for Multiple coil magnetic structure 2600 in parallel.Structure 2600 can include multiple electric conductor 2616A to 2616D, multiple electric conductor 2616A to 2616D position along the periphery of structure 2600 and the periphery of proximity structure 2600 Winding 1412A extends.Multiple electric conductor 2616A to 2616D include electric conductor 2616A, 2616B of extending in this first plane with And in the second plane be perpendicular to the first plane extend one or more electric conductor 2616C, 2616D.As shown in figure 26, exist Electric conductor 2616A, the 2616B extended in first plane positions along the side surface of structure 2600, and extends in the second plane One or more electric conductor 2616C, 2616D along the top surface of structure 2600 or lower surface location.

Electric conductor 2616A to 2616D can be physically attached to structure 2600.Such as, electric conductor 2616A, 2616B is permissible Being formed by utilizing the part on conduction material covered structure 2600 surface, electric conductor 2616C, 2616D can include simultaneously The top surface of covered structure 2600 or the inductive material of a part for lower surface.Alternately, electric conductor 2616A is extremely 2616D can be separated physically from structure 2600.

Figure 27 A to Figure 31 illustrates the illustrative embodiments of Multiple coil magnetic structure in parallel.Every shown in Figure 27 A to Figure 31 Individual structure all includes four winding 2712A to 2712D and iron core 2702.Each winding 2712A to 2712D has input unit and defeated Go out the direction that portion, input unit and output unit can be wound around on iron core 2702 by winding to determine.Asterisk is used to point out input And output directional.

Figure 27 A illustrates Multiple coil magnetic structure 2700A in parallel of the electric conductor 2716A with short circuit.Therefore, electric conductor 2716A can keep suspension.Because electric conductor 2716A is not initiate or the sequential short circuit loop of terminal, the therefore electricity of short circuit Conductor 2716A illustrates without asterisk.

Figure 27 B illustrates Multiple coil magnetic structure 2700B in parallel with electric conductor 2716B.As shown in figure 27b, electric conductor 2716B (via terminal 2718B) can be electrically connected to reference voltage.Such as, electric conductor 2716B can be electrically connected to ground.This Outward, electric conductor 2716B can be electrically connected to reference voltage via capacitor 2720B.Therefore, electric conductor 2716B can be configured to Electromagnetic shielding and therefore reduce EMI.

Figure 28 illustrates the Multiple coil magnetic structure 2800 in parallel with discontinuous electric conductor 2816.Therefore, electric conductor 2816 have relative end.As shown in figure 28, at least one in the relative end of electric conductor 2816 could be attached to one Individual or multiple components 2818.Component shown in Figure 28 is only the example of possible proper circuit element, and therefore Should be it is clear that the most suitable component can be used as one or more components 2818.

One or more components 2818 can include passive circuit and/or active circuits.Passive circuit can be in order to Form required frequency characteristic or the time response of the energy conversion for structure 2800.Active circuits can be in order to change structure The electrical quantity (such as, about the signal of winding 2712A to 2712D) of 2800.

Additionally, electric conductor 2816 can be with the entirety of all winding 2712A to 2712D as magnetic structure of connecting, and winding 2712A to 2712D still forms magnetic structure in parallel.

Figure 29 illustrates Multiple coil magnetic structure 2900 in parallel, and it has and includes for being attached to one or more component The electric conductor 2916 of relative end.The one or more component can include wave filter 2918.As shown in figure 29, Wave filter 2918 includes high pass filter and inducer, high pass filter have be connected in electric conductor 2916 relative end it Between capacitor, inducer is connected between each relative end Yu reference voltage (such as, ground).

When high pass filter is attached to electric conductor 2916, electric conductor 2916 is by only roll off frequency (roll-to wave filter Off frequency) more than frequency work (as mentioned above).For the frequency below roll off frequency, by electric conductor 2916 The non-coupled magnetic field reduced will hinder stream to reduce by faradic extra magnetic resistance.Therefore, the leakage inductance of structure 2900 will be aobvious Show the frequency dependence relevant to the frequency characteristic of wave filter, and this structure is by rise in the way of there is not electric conductor 2916 Effect.

Although Figure 29 illustrates the high pass filter with particular configuration, but other suitable high pass can also be used to filter Ripple device configuration, is being equally useful other suitable wave filter (such as, low-pass filtering without departing from the scope of this disclosure Device, band filter, band elimination filter etc.).

Figure 30 illustrates the Multiple coil magnetic structure 3000 in parallel with electric conductor 3016.Electric conductor 3016 includes for coupling Opposed end to one or more components.As shown in figure 30, one or more components include DC current source 3018. DC current source 3018 can offset the DC electric current from winding 2712A to 2712D, the DC magnetic flux density reduced in iron core 2702 And/or reduce the magnetic saturation of iron core 2702.Additionally, DC current source 3018 can be in order to make iron core 2702 prebias so that ferrum Core 2702 operates with non-zero DC magnetic flux density.

Additionally, the one or more component can include the electric capacity being connected between the relative end of electric conductor Device 3020.Capacitor 3020 can provide low magnetic resistance AC path, to allow electric conductor 3016 to work in the manner.

Figure 31 illustrates the Multiple coil magnetic structure 3100 in parallel with electric conductor 3116.Electric conductor 3116 includes for coupling Relative end to one or more components.As shown in figure 31, one or more components include AC voltage source 3118.AC voltage source 3118 provides voltage signal to each winding 2712A to 2712D of structure 3100.Voltage signal can be used To change the voltage of structure 3100.

Above be only the example of the one or more components that could be attached to electric conductor.Should it is clear that The most suitable component can be used without departing from the scope of this disclosure.Additionally, the component of Figure 28 to Figure 31 Or the reference voltage of Figure 27 A can couple in any appropriate position along electric conductor length.

One or more electric conductor can be used in the structure have straight line, or have what non-rectilinear was arranged Each winding is disposed adjacent to all (or as much as possible) other windings by structure and uses one or more Electric conductor.Figure 32 A to Figure 32 I illustrates multiple illustrative embodiments that explanation combines the configuration of this aspect.Figure 32 A is to figure In 32I, each of which is the cross-sectional view of the Multiple coil magnetic structure in parallel including one or more electric conductor.If Figure 32 A is to figure Shown in 32I, one or more electric conductors can extend along the periphery of structure.Such as, Figure 32 A to Figure 32 I illustrates along structure The electric conductor 3212A to 3212I that neighboring extends.

Extraly and/or alternately, one or more electric conductors can extend along the inner rim of structure.Such as, such as figure Shown in 32H, structure includes neighboring and inner rim, and it at least has some windings adjacent to inner rim location.First electric conductor 3212H extends along the neighboring of structure, and the second electric conductor 3214 positions along the inner rim of structure and the inner rim of proximity structure Winding extend.Therefore, the first electric conductor 3212H reduces the amount in the circumferentially non-coupled magnetic field on limit, and the second electric conductor 3214 amounts reducing the non-coupled magnetic field along inner rim.

The the first electric conductor 3212H extended along the neighboring of structure can be electrically connected to the extended along the inner rim of structure Two electric conductors 3214.First electric conductor 3212H, the second electric conductor 3214 can be along the whole length of conductor or of conductor Or some with series connection or electrically connects in parallel.

Figure 32 I illustrates the structure with iron core, and this iron core includes Part I 3202A and by air gap 3216 and the The Part II 3202B that a part of 3202A separates.This structure also includes the electric conductor extended along the opposite side of air gap 3216 3212I.As shown in Figure 32 I, electric conductor 3212I is by crossing formation between Part I 3202A and Part II 3202B Air gap 3216 carrys out wound core.Owing to crossing air gap 3216, therefore the non-coupled magnetic field in air gap 3216 may be by electricity Conductor reduces.

Alternately, two separate Multiple coil magnetic structures in parallel can be linked together by electric conductor, described conductance Body is constructed similarly to shown in Figure 32 I and at electric conductor as above.

Figure 33 illustrates two by electric conductor 3312 cincture separate Multiple coil magnetic structures 3302,3304 in parallel.Structure 3302,3304 can have non-immediate magnetic connection.As shown in figure 33, electric conductor 3312 proximity structure 3302,3304 is all Side extends.

It can be the most suitably number with the most suitably number of turns as explained above with the multiple windings described in Figure 21 to Figure 33 The winding of amount, as long as the quantity of winding is at least three.Therefore, have can use without departing from the scope of this disclosure The most three or more the windings (including four windings, 12 windings etc.) of the number of turns.

Additionally, multiple winding as above can be plane winding.Alternately, in the feelings without departing from disclosure scope Under condition, winding can be the most suitable winding.

Additionally, the electric conductor and the multiple winding that describe as explained above with Figure 21 to Figure 33 can be formed at and have one or many On circuit board on individual layer.Alternately, electric conductor and multiple winding can be formed on the most suitable surface or pass through The most suitable surface bearing.

Additionally, include as illustrated in Figure 21 to Figure 33 and can use at one or more electric conductors as above One or more features of the Multiple coil magnetic structure as above in parallel of the various features shown in Fig. 4 to Figure 20.

Can have middle employings such as the most suitable power supply changeover device such as plural parallel stage power supply changeover devices The Multiple coil magnetic structure any one or more in parallel of the electric conductor peripherally extended.

The Multiple coil magnetic structure in parallel with electric conductor can reduce the magnetic flux in the iron core of the leakage inductance of structure, reduction structure Density, the core loss of reduction structure, increase use the bandwidth of transducer of this structure, the current balance type improved between winding, subtract The outside of little generation EMI or stray magnetic fields, the size of reduction structure and/or reduction maybe may eliminate the air gap in structure.

The plural parallel stage power power-supply transducer using the structure with electric conductor can increase regulation bandwidth, increase effect Rate, the output voltage precision that increases, the size of power supply changeover device that reduces, simplification manufacture process and/or reduction electromagnetic interference.

Provide the foregoing description of embodiment the most for the purpose of illustration and description.This is not intended to exhaustive or limit The present invention processed.The single element of detailed description of the invention and feature are generally not limited to this detailed description of the invention, but suitably In the case of can exchange and can use in selected embodiment, even if not being particularly shown or describing. They can also be varied in many ways.This variant is not regarded as a departure from the present invention, and all of this remodeling should It is included in the scope of the present disclosure.

Claims (26)

1. a Multiple coil magnetic structure in parallel, comprising:

Magnetic core, described magnetic core has at least three post and limits the multiple magnetic flux paths by described iron core；

Multiple windings, the plurality of winding extends around the described iron core of part, and at least some in described winding is adjacent to described structure Periphery location, the plurality of winding be configured to produce magnetic field；And

Electric conductor, the described winding that described electric conductor positions along the periphery of described structure and the periphery of neighbouring described structure extends, Described electric conductor is configured to produce substantially offsets the magnetic field that produced by the described winding of the periphery location of neighbouring described structure Magnetic field,

Wherein, the current flow configuration in each winding in the plurality of winding becomes to flow in same direction, and described electric conductor Interior current flow configuration becomes along the direction flowing relative with the electric current of flowing in described each winding.

2. structure as claimed in claim 1, wherein, described structure includes multiple electric conductor, and the plurality of electric conductor is along described The described winding of the periphery of structure and the periphery location of neighbouring described structure extends.

3. structure as claimed in claim 2, wherein, the plurality of electric conductor is by the institute of the periphery location of neighbouring described structure State winding separated from one another.

4. structure as claimed in claim 3, wherein, the described winding of the periphery location of neighbouring described structure is each to be had and institute State multiple circles that multiple electric conductor interleaves.

5. structure as claimed in claim 4, wherein, the plurality of electric conductor is described with the periphery location of neighbouring described structure All circles in the plurality of circle of winding interleave.

6. structure as claimed in claim 2, wherein, the plurality of electric conductor is electrically connected to each other.

7. structure as claimed in claim 6, wherein, the plurality of electric conductor include the electric conductor that extends in this first plane with And in the second plane being perpendicular to described first plane extend one or more electric conductors.

8. structure as claimed in claim 7, wherein, the described electric conductor extended in described first plane is by described the The one or more electric conductor extended in two planes is electrically connected to each other.

9. structure as claimed in claim 7, wherein, the described electric conductor extended in described first plane is along described structure Side surface positions, and the one or more electric conductor extended in described second plane is along the top table of described structure Face or lower surface location.

10. structure as claimed in claim 1, wherein, described periphery is the neighboring of described structure.

11. structures as claimed in claim 10, wherein, described electric conductor is the first electric conductor, and described structure includes inner rim, And at least some in described winding positions adjacent to the inner rim of described structure, and described structure also includes the second electric conductor, institute State the described winding extension along the inner rim location of the inner rim of described structure and neighbouring described structure of second electric conductor.

12. structures as claimed in claim 11, wherein, the described electric conductor that the neighboring along described structure extends is electrically connected to The described electric conductor extended along the inner rim of described structure.

13. structures as claimed in claim 1, wherein, described periphery is the inner rim of described structure.

14. structures as claimed in claim 1, wherein, described iron core includes Part I and Part II, described Part II Separated with described Part I by air gap, and described electric conductor is along the two opposite sides extension of described air gap.

15. structures as claimed in claim 1, wherein, described electric conductor forms closed-loop path.

16. structures as claimed in claim 1, wherein, described electric conductor is electrically connected to reference voltage.

17. structures as claimed in claim 16, wherein, described electric conductor is electrically connected to described reference voltage via capacitor.

18. structures as claimed in claim 1, wherein, described electric conductor has two relative ends, and described two relative At least one in end is attached to one or more component.

19. structures as claimed in claim 18, wherein, the one or more component includes wave filter.

20. structures as claimed in claim 18, wherein, the one or more component includes DC current source.

21. structure as claimed in claim 18, wherein, the one or more component includes AC voltage source.

22. structures as claimed in claim 18, wherein, the one or more component includes capacitor, described electric capacity Device is connected between the described two relative ends of described electric conductor.

23. structures as claimed in claim 1, wherein, described electric conductor and the plurality of winding are formed at has one or many On the circuit board of individual layer.

24. structures as claimed in claim 1, wherein, the plurality of winding is equal to four windings.

25. structures as claimed in claim 1, wherein, the plurality of winding is equal to 12 windings.

Structure any one of in 26. such as aforementioned claim, wherein, the plurality of winding is plane winding.