CN104681248A - Contactless transformer - Google Patents

Contactless transformer Download PDF

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Publication number
CN104681248A
CN104681248A CN201510086843.2A CN201510086843A CN104681248A CN 104681248 A CN104681248 A CN 104681248A CN 201510086843 A CN201510086843 A CN 201510086843A CN 104681248 A CN104681248 A CN 104681248A
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winding
magnetic core
former limit
auxiliary winding
magnetic
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CN104681248B (en
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陈乾宏
柯光洁
徐立刚
任小永
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Nanjing University of Aeronautics and Astronautics
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Nanjing University of Aeronautics and Astronautics
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Abstract

The invention discloses a contactless transformer, which comprises a primary-side magnetic core, a primary-side winding, a secondary-side magnetic core and a secondary-side winding, wherein the secondary-side winding of the contactless transformer comprises a main secondary-side winding and an auxiliary winding; the auxiliary winding is of a two-section type or a multi-section type; each section of the auxiliary winding is overlapped, partially overlapped or not overlapped with the main secondary-side winding. According to the contactless transformer, each section of the auxiliary winding is distributed in different areas of the secondary-side magnetic core of the contactless transformer to form one, two or more auxiliary winding units, and the auxiliary winding units with optimal magnetic flux coupling effects are automatically switched under the conditions of dislocation in different directions and different degrees, so that the condition of no power transmission at a sending blind spot is further avoided by the combined output of each auxiliary winding unit and the main secondary-side winding, the power transmission of the main secondary-side winding is effectively compensated, the dislocation sensitivity of output characteristics of the contactless transformer is reduced, and the power transmission capability of the contactless transformer is improved.

Description

A kind of non-contact transformer
Technical field
The present invention relates to non-contact power technology, be specifically related to a kind of vice-side winding additional two sections or multistage and assist winding, with the non-contact transformer of secondary main winding array output.
Background technology
Non-contact power utilizes magnetic Field Coupling to realize " wireless power ", namely the non-contact transformer that former secondary is separated completely is adopted, by the coupled transfer electric energy of high frequency magnetic field, make at limit, energy transfer process Central Plains (supply side) and secondary (electricity consumption side) without physical connection.Compared with powering with traditional contact, non-contact power is easy to use, safe, no-spark and Danger Electric shock risk, without laying dust and contact loss, mechanical wearing and tearing and corresponding maintenance issues, can adapt to multiple bad weather and environment, be convenient to realize automatic power, have a good application prospect.
Although non-contact power technology is easy to use, advantages, the shortcoming of its low coupling existed compared to close coupling transformer, large leakage inductance but reduces system effectiveness, also constrains the promotion and application of non-contact power technology simultaneously.Related losses testing and analysis result shows: under full load conditions, and the loss of transformer accounts for more than 70% of system total losses.And explicitly point out in prior art, the efficiency of transmission of transformer be improved, the coupling coefficient of transformer must be improved as far as possible.As can be seen here, the coupling coefficient improving non-contact transformer is the key improving contactless system efficiency.
In order to obtain high coupling coefficient, at present, the non-contact transformer structure adopting complanation, is amassed by the right opposite increasing transformer more, thus when ensureing air gaps, the magnetic resistance of non-contact transformer former secondary Coupled Magnetic Path can not be excessive, improves the coupling coefficient of non-contact transformer as much as possible.At present the magnetic flux coupled characteristic of the existing former vice-side winding of non-contact transformer be former secondary magnetic core completely just pair time, couples magnetic flux is maximum, and coupling coefficient is maximum, and the power delivery capabilities of system and efficiency characteristic are usually also best.Along with the intensification of former secondary magnetic core degree of misalignment, magnetic circuit reluctance characteristic variations corresponding to the leakage flux closed through former limit is little, but corresponding to the flux portion of former secondary coupling, the magnetoresistive characteristic of magnetic circuit then obviously increases because of the prolongation of magnetic flux path and the remarkable reduction of effective magnetic conductive area, causes coupling coefficient to reduce obviously.In order to address this problem, Korea S S. Lee, J. Huh, C. Park, N.-S. Choi, G.-H. Cho and C.-T. Rim, " On-Line Electric Vehicle using inductive power transfer system, " in IEEE Energy Conversion Congress and Exposition (ECCE), 2010, pp. 1598-1601 applies in conjunction with rail mounted non-contact power, the core shapes of former limit and secondary is optimized, propose the core structure of plshy bone open, greatly reduce the magnetic core area of former limit excitation side, air gap is changed, during dislocation, magnetic conductive area change is not obvious, improve the susceptibility that non-contact transformer coupling coefficient changes air gap and misplaces, G. A. Covic, J. T. Boys, M. L. G. Kissin and H. G. Lu, " A Three-Phase Inductive Power Transfer System for Roadway-Powered Vehicles, " IEEE Transactions on Industrial Electronics, vol. 54, no. 6, pp. 3370 – 3378 apply in conjunction with rail mounted non-contact power, propose the mode of three-phase former limit winding energization, reduce the change that Distribution of Magnetic Field distributes along track width horizontal direction, reduce the sensitivity to lateral shift, Nanjing Aero-Space University, Zhong Xing new-energy automobile Co., Ltd, Chen Qianhong, " a kind of non-contact transformer, CN104319076 " patent that Hou Jia etc. propose proposes a kind of asymmetric core structure, by the increase of secondary magnetic core horizontal area, reduce the dislocation susceptibility of non-contact transformer coupling coefficient.
For the non-contact transformer structure of existing former limit section of winding coiling, the change of couples magnetic flux direction, dislocation vice-side winding also may be made to be coupled to into and out of magnetic flux offset completely, and then making coupling coefficient almost nil, non-contact transformer loses power delivery capabilities.Several non-contact transformer structures improving coupling coefficient misalignment capability provided above are invalid to this.Auckland Mickel Budhia, John T. Boys, Grant A. Covic and Chang-Yu Huang, " Development of a Single-Sided Flux Magnetic Coupler for Electric Vehicle IPT Charging Systems " IEEE Transactions on Industrial Electronics, vol. 60, no. 1, January 2013 proposes the tertiary winding (by abbreviation Q winding) that superposition is overlapping with vice-side winding in the middle of non-contact transformer secondary two winding (by being called for short DD winding), reduce the transversion malposition susceptibility of secondary output power, be in " to enter when solving dislocation preferably, go out magnetic flux to offset completely " " induction blind spot " and affect the problem of power delivery capabilities.Although but this transformer device structure is for laterally or longitudinally dislocation is all insensitive, when there is angle dislocation, as the axes normal of former vice-side winding, an angle of 90 degrees occurs to dislocation, the winding construction of this " DDQ " can lose power delivery capabilities.Consider the uncertainty of transformer primary secondary dislocation in practical application, transversion malposition, longitudinally dislocation, angle dislocation and their combination in any situation all likely occur, and need to be optimized the structure of non-contact transformer.
Summary of the invention
In order to solve the problems of the technologies described above, the invention provides a kind of non-contact transformer, on the basis of existing non-contact transformer vice-side winding, additional two sections or multistage assist winding, can the former secondary of self adaptation non-contact transformer in the misalignment of all directions, effectively reduce the susceptibility of non-contact transformer output characteristic to dislocation.
Concrete technical scheme of the present invention is as follows:
A kind of non-contact transformer, comprises former limit magnetic core, former limit winding, secondary magnetic core and vice-side winding;
Described non-contact transformer vice-side winding comprises secondary main winding and auxiliary winding, and this auxiliary winding adopts two-part or multisection type, and each section of winding of auxiliary winding be overlapping with secondary main winding, partly overlap or not overlapping coiling.
Further design of the present invention is:
Each section of winding of described auxiliary winding directly exports or each section of winding is interconnected rear output, forms several output units; The mode that is interconnected of described each section of winding adopts series, parallel or connection in series-parallel.
Several output units described and the array output of secondary main winding, its array output mode adopts series, parallel or connection in series-parallel to connect, export after rectification again, its winding connection makes magnetic core just inconsistent to the magnetic flux coupling effect of former limit winding and each section of auxiliary winding in situation, or array output mode adopts after rectification, and series, parallel or connection in series-parallel export again.
Its winding connection makes magnetic core just inconsistent to the magnetic flux coupling effect of former limit winding and each section of auxiliary winding in situation, and forward coupling and reverse coupled exist simultaneously, and the coupling coefficient of ideally former limit winding and auxiliary winding is zero.
Wherein, auxiliary winding is preferably two sections of windings, and two sections of winding constructions are identical, and longitudinally symmetry is wound on secondary magnetic core both sides, and two sections of windings directly export, and forms two output units, and exports with secondary main winding serial or parallel connection after rectification.
Wherein, former limit winding and secondary main winding are single winding, two sections of windings or multistage winding, and every section of winding forms a pole regions, former/secondary each section of windings in series, parallel connection or connection in series-parallel be connected to form one or more former/vice-side winding.
Wherein, each section of winding of auxiliary winding can be expanded along any direction of the plane perpendicular to air gap, each section of winding of auxiliary winding is being triangle, quadrangle, circle, fan-shaped, polygon perpendicular to the geometry in the plane of air gap, or more the combination of shape.
Described auxiliary winding and described secondary main winding each section of umber of turn is equal or not etc.
Described auxiliary winding is equal with described secondary main winding sectional wind number or not etc.
Wherein, the structure of former limit magnetic core and/or secondary magnetic core can be selected: U-shaped, I type, column bottom, both sides are along the combination of the abducent edge expansion type of side, cross or above-mentioned shape.
Wherein, described former limit magnetic core and secondary magnetic core all can be selected monoblock magnetic core or adopt array method assembling combination to form by polylith magnetic core.
Wherein, described former limit magnetic core and secondary magnetic core all can select permeability magnetic material silicon steel sheet, ferrite, amorphous, crystallite, ultracrystallite, permalloy or powder core material to make; Or non-magnet material air, pottery, epoxy or plastics are made; Or combined by one or more permeability magnetic materials and/or one or more non-magnet materials and realize.
Wherein, the wire of former limit winding, secondary main winding and auxiliary winding all can select solid conductor, Litz line, copper sheet, copper pipe, or PCB winding.
Wherein, be provided with magnetic masking layer outside described former limit and/or secondary, this magnetic masking layer adopts barricade, paper tinsel, film or the gauze screen woven by shielding material or shielding cloth;
The material of described magnetic masking layer adopts magnetic material powder core, magnetic thin film, ferrite, amorphous, crystallite, ultracrystallite or permalloy to make; Or adopt conduction non-magnetic metal material of copper, silver, aluminium or lead to make;
When outside the magnetic core of described former limit, magnetic masking layer adopts shielding of magnetic material powder core, magnetic thin film, ferrite, amorphous, crystallite, ultracrystallite or permalloy, former limit masked segment is not connected with former limit magnetic core.
the present invention compared to existing technology tool has the following advantages:
1, the present invention designs a kind of non-contact transformer, can the former secondary of self adaptation in the misalignment of all directions, reduce the sensitiveness that non-contact transformer power out-put characteristic changes position, former and deputy limit.
2, addition of the non-contact transformer of auxiliary winding in the present invention, under former secondary dislocation condition, former limit winding is different from the magnetic flux coupled characteristic of additional auxiliary winding magnetic flux coupled characteristic and former limit winding and secondary main winding, reliably can avoid the inactivity transmission situation responding to the appearance of blind spot place, the power delivery of effective compensation secondary main winding, reduces the dislocation susceptibility of non-contact transformer output characteristic.
3, addition of the non-contact transformer of auxiliary winding in the present invention simultaneously, by each section of winding of auxiliary winding being distributed in the zones of different of non-contact transformer secondary magnetic core, form one, two or more auxiliary winding element, achieve under different directions and dislocation condition in various degree, the auxiliary winding element of automatic switchover magnetic flux coupling effect the best, and then by the array output of each auxiliary winding output unit and secondary main winding, effectively utilize auxiliary winding to improve the power delivery capabilities of non-contact transformer.
Other features and advantages of the present invention will be set forth in the following description, and, partly become apparent from specification, or understand by implementing the present invention.Object of the present invention and other advantages realize by structure specifically noted in specification, claims and accompanying drawing and obtain.
Accompanying drawing explanation
Accompanying drawing described herein is used to provide a further understanding of the present invention, and form a application's part, schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 (a) is the structural representation of non-contact transformer secondary main winding of the present invention;
Fig. 1 (b) is the structural representation of non-contact transformer secondary main winding of the present invention;
Fig. 2 is the structural representation of non-contact transformer first embodiment of the present invention;
Fig. 3 is the structural representation of non-contact transformer second embodiment of the present invention;
Fig. 4 is the structural representation of non-contact transformer of the present invention 3rd embodiment;
Fig. 5 is the structural representation of non-contact transformer of the present invention 4th embodiment;
Fig. 6 is the structural representation of non-contact transformer of the present invention 5th embodiment;
Fig. 7 is the structural representation of non-contact transformer of the present invention 6th embodiment;
Fig. 8 is the structural representation of non-contact transformer of the present invention 7th embodiment;
Fig. 9 is the structural representation of non-contact transformer of the present invention 8th embodiment;
Figure 10 is the structural representation of non-contact transformer of the present invention 9th embodiment;
Figure 11 is the structural representation of non-contact transformer of the present invention tenth embodiment;
Figure 12 is the structural representation of non-contact transformer the 11 embodiment of the present invention;
Figure 13 is the structural representation of non-contact transformer the 12 embodiment of the present invention;
Figure 14 is the structural representation of non-contact transformer the 13 embodiment of the present invention;
Figure 15 (a) is the magnetic field simulation figure of the non-contact transformer of existing edge expansion type structure;
Figure 15 (b) is the magnetic field simulation result figure of the non-contact transformer of existing edge expansion type structure;
The magnetic field simulation figure of the non-contact transformer that Figure 15 (c) is existing edge expansion type structure in former and deputy limit relative position generation transversion malposition situation;
The magnetic field simulation result figure of the non-contact transformer that Figure 15 (d) is existing edge expansion type structure in former and deputy limit relative position generation transversion malposition situation;
Figure 16 (a) adds the magnetic field simulation figure that secondary two sections or multistage assist the non-contact transformer of winding for the present invention;
Figure 16 (b) adds the magnetic field simulation result figure that secondary two sections or multistage assist the non-contact transformer of winding for the present invention;
Figure 16 (c) adds secondary two sections for the present invention or multistage assists the magnetic field simulation figure of the non-contact transformer of winding in former and deputy limit relative position generation transversion malposition situation;
Figure 16 (d) adds secondary two sections for the present invention or multistage assists the magnetic field simulation result figure of the non-contact transformer of winding in former and deputy limit relative position generation transversion malposition situation;
Figure 17 (a) adds secondary two sections for the present invention or multistage assists the non-contact transformer secondary main winding of winding and the circuit diagram exported of connecting after auxiliary winding rectification;
Figure 17 (b) adds the circuit diagram that secondary two sections or multistage assist Parallel opertation after the non-contact transformer secondary main winding of winding and auxiliary winding rectification for the present invention;
Figure 17 (c) for the present invention add secondary two sections or multistage assist the non-contact transformer secondary main winding of winding and auxiliary winding serial after the circuit diagram that exports of rectification;
Figure 17 (d) for the present invention add secondary two sections or multistage assist the non-contact transformer secondary main winding of winding and auxiliary winding parallel after the circuit diagram that exports of rectification
Figure 18 is the non-contact transformer voltage gain test curve figure that the present invention adds that secondary two sections or multistage assist winding.
Embodiment
For making the object, technical solutions and advantages of the present invention clearly understand, hereinafter will be described in detail to embodiments of the invention by reference to the accompanying drawings.It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combination in any mutually.
Below in conjunction with specific embodiment, non-contact transformer of the present invention is described.In following examples, non-contact transformer is made up of former limit 101 and secondary 102, there is air gap 103 between former limit 101 and secondary 102.
Fig. 1 is non-contact transformer secondary main winding structure chart of the present invention.As shown in Figure 1 (a) and Fig 1 (b) shows, the structure of former limit magnetic core 110 and secondary magnetic core 120 is two side columns (former limit magnetic core side column 110A and secondary magnetic core side column 120A) bottom along the abducent edge expansion type of side, and former limit winding 111 is by point forward to connect around two parts winding on the magnetic core side column of magnetic core both sides, former limit or heteropleural is formed in parallel.
Fig. 1 (a) and Fig. 1 (b) sets forth two kinds of connected modes of secondary main winding, as shown in Fig. 1 (a), secondary main winding 121 is forward in series around two sections of windings 121A, 121B on secondary two magnetic core side columns by dividing.As shown in Fig. 1 (b), secondary main winding 121 is formed in parallel around two sections of winding 121A, 121B heteropleurals on secondary two magnetic core side columns by dividing, two kinds of connected modes all make magnetic core just all be coupled with former limit forward to the two sections of windings of secondary main winding in situation, between former secondary, couples magnetic flux is maximum, coupling coefficient is maximum, the power delivery capabilities of system and efficiency characteristic the best of transformer.Under longitudinal dislocation condition, although the magnetic resistance of the corresponding magnetic circuit of the magnetic flux of former secondary coupling increases, the Distribution of Magnetic Field rule of vice-side winding couples magnetic flux is substantially constant.This structure winding around magnetic pole area relatively large, the coupling coefficient of non-contact transformer is to longitudinally dislocation is not too responsive.But when there is transversion malposition and angle dislocation, the magnetic resistance of the corresponding magnetic circuit of one side couples magnetic flux can extend because of magnetic flux path, former vice-side winding right opposite amasss and reduces and increase, simultaneously the magnetic flux that is coupled to of vice-side winding can because of dislocation have enter, going out of having, effective magnetic conductive area is reduced greatly, and therefore the non-contact transformer of this structure can misplace very sensitive to transversion malposition and angle.Transversion malposition to a certain extent time, secondary main winding be coupled to into and out of magnetic flux there will be situation about offsetting completely, and then make coupling coefficient almost nil, lose power delivery capabilities.Angle misplace 90 ° time, the magnetic flux that secondary main winding is coupled to is approximately zero, and now vice-side winding does not have power delivery capabilities.
In embodiment one ~ embodiment nine, in embodiment 13, secondary main winding structure is see accompanying drawing 1.
embodiment one:
Fig. 2 is the structural representation of non-contact transformer first embodiment of the present invention, as shown in Figure 2, in first embodiment, the structure of former limit magnetic core 110 and secondary magnetic core 120 is two side columns (former limit magnetic core side column 110A and secondary magnetic core side column 120A) bottom along the abducent edge expansion type of side, and former limit winding 111 is by point forward to connect around two parts winding on two magnetic core side columns or heteropleural is formed in parallel; Vice-side winding comprises secondary main winding 121 (lower not shown in Fig. 2) and additional auxiliary winding 122.Thus form the non-contact transformer of additional auxiliary winding of the present invention.Wherein, former limit winding, secondary main winding, auxiliary winding can adopt Lize line, copper sheet, copper pipe coiling, also can adopt the modes such as PCB winding.
Auxiliary winding 122 is divided into two sections, and two sections of windings 122A, 122B of the auxiliary winding of composition are quadrangle at the plane geometric shape of air gap vertical direction, and mutually not overlapping between two sections of windings, but overlapping with two sections of windings section of secondary main winding.Two sections of winding 122A, 122B horizontal windings of auxiliary winding, built in secondary core center region, are symmetrically distributed in secondary magnetic core 120 both sides in the y-direction.Two sections of windings 122A, 122B directly export separately, form two output units.The output of auxiliary winding and secondary main winding, respectively after rectification, according to the demand of load voltage or electric current, then adopts the mode of serial or parallel connection to be added in load.
The flow direction that two sections, former limit winding energization produces is change in horizontal x direction, if left one side of something enters, right one side of something goes out, and is formed closed.Just in situation, the magnetic flux that the excitation of former secondary magnetic core former limit produces be coupled to each section of auxiliary winding into and out of magnetic flux cancel out each other, two sections of windings 122A, 122B are zero with the coupling coefficient of former limit winding 111 separately, and time just pair, array output characteristic is still the output characteristic of secondary main winding 121.Along with the intensification of transversion malposition degree, two sections of windings 122A, 122B of auxiliary winding 122 all have certain skew relative to former limit winding 111, what the former limit excitation that is coupled produced can not cancel out each other into and out of magnetic flux, each section of winding of auxiliary winding is non-vanishing with the coupling coefficient of former limit winding separately, all there is power output capacity, after main winding array output, reliably can avoid the inactivity transmission situation responding to the appearance of blind spot place, the power delivery of effective compensation secondary main winding, reduces the dislocation susceptibility of non-contact transformer output characteristic.
When there is angle skew, 90 ° are offset for extreme case angle, because former secondary is just symmetrically distributed in 120 both sides in the middle part of secondary magnetic core in the y-direction to two sections of windings 122A, 122B of winding 122 auxiliary in situation, so when angle offsets 90 °, although the flow direction that two sections of windings 122A, 122B of auxiliary winding 122 are coupled to is different, but because two sections of windings independently export, so two sections of windings 122A, 122B are non-vanishing with the coupling coefficient of former limit winding 111 separately, voltage is all had to export and power delivery capabilities.The winding construction form that auxiliary winding 122 is divided into two sections to be symmetrically distributed in magnetic core both sides in the y-direction simultaneously can the misalignment of self adaptation all directions, when there is the dislocation of different dislocation direction in former secondary, all have one section or two sections of auxiliary windings to there is magnetic flux with former limit winding 111 to be coupled, compensate the power stage of secondary main winding 121, avoid the inactivity transmission situation responding to the appearance of blind spot place.Winding construction is assisted to there will be the situation of the equal inactivity transmittability of main and auxiliary winding when angle offsets according to single hop.
embodiment two:
Fig. 3 is the structural representation of non-contact transformer second embodiment of the present invention, as shown in Figure 3, in second embodiment, the structure of former limit magnetic core 110 is that two side columns (former limit magnetic core side column 110A) bottom is along the abducent edge expansion type of side, the basic configuration of secondary magnetic core is decussate texture, wherein in x direction, have employed two side columns (secondary magnetic core side column 120A) bottom along the abducent edge expansion type feature structure of side, the core portion (120B) in secondary y direction also can adopt edge expansion type structure.Whole magnetic core both can adopt monoblock magnetic core that polylith magnetic core also can be adopted to splice and combine and form, and namely adopted the core structure of array, and keep x direction magnetic core to be closely connected when wherein the core portion in x direction is laid, reduce the magnetic resistance in x direction, y direction can be separated as far as possible; Keep y direction magnetic core to be closely connected when the core portion in y direction is laid, reduce the magnetic resistance in y direction, x direction can be separated as far as possible.Former limit winding 111 is by forward to connect point around two parts winding on two magnetic core side columns or heteropleural is formed in parallel; Vice-side winding comprises secondary main winding 121 (in detail see in Fig. 1, Fig. 2 lower not shown) and additional auxiliary winding 222.Wherein secondary main winding 121 is by point forward to connect around two parts winding of the magnetic core side column 120A in two x directions or heteropleural is formed in parallel.Thus form the non-contact transformer of additional auxiliary winding of the present invention.
Auxiliary winding 222 is divided into two sections, two sections of windings 222A, 222B of the auxiliary winding of composition divide the part 120B in the y direction around secondary magnetic core, two sections of windings are quadrangle at the plane geometric shape of air gap vertical direction, and mutually not overlapping between two sections of windings, but can partly overlap with two sections of windings of secondary main winding.Two sections of winding 222A, 222B horizontal windings of auxiliary winding, built in secondary core center region, are symmetrically distributed in the both sides of in the middle part of secondary magnetic core 120 in the y-direction.Two sections of windings 222A, 222B directly export separately, form two output units.The output of auxiliary winding and secondary main winding, respectively after rectification, according to the demand of load voltage or electric current, then adopts the mode of serial or parallel connection to be added in load.
Its operation principle and embodiment one similar.Relatively with embodiment one, secondary magnetic core employing decussate texture, secondary magnetic core adds the extension 120B in y direction.When there is angle skew, the magnetoresistive characteristic of magnetic circuit obviously reduces because the existence of y direction core portion makes the increase of effective magnetic conductive area corresponding to the flux portion of auxiliary winding coupled, the coupling coefficient of former limit winding and auxiliary winding increases, and can improve the efficiency of power delivery capabilities and transformer.
embodiment three:
Fig. 4 is the structural representation of non-contact transformer of the present invention 3rd embodiment, as shown in Figure 4, in 4th embodiment, the structure of former limit magnetic core 110 and secondary magnetic core 120 is two side columns (former limit magnetic core side column 110A and secondary magnetic core side column 120A) bottom along the abducent edge expansion type of side, and former limit winding 111 is by point forward to connect around two parts winding on two magnetic core side columns or heteropleural is formed in parallel; Vice-side winding comprises secondary main winding 121 (lower not shown in Fig. 4) and additional auxiliary winding 322.Thus form the non-contact transformer of additional auxiliary winding of the present invention.
Auxiliary winding 322 is divided into two sections, two sections of windings 322A, 322B of the auxiliary winding of composition are quadrangle at the plane geometric shape of air gap vertical direction, and part is overlapping between two sections of windings, simultaneously overlapping with two sections of windings section of secondary main winding, auxiliary winding is positioned at outside the air gap of secondary main winding.Two sections of winding 322A, 322B horizontal windings of auxiliary winding, built in secondary core center region, are symmetrically distributed in secondary magnetic core 120 both sides in the y-direction.Two sections of windings 322,322B directly export separately, form two output units.The output of auxiliary winding and secondary main winding, respectively after rectification, according to the demand of load voltage or electric current, then adopts the mode of serial or parallel connection to be added in load.
When non-contact transformer secondary area is certain, overlapping by the part between two sections of windings 322A, 322B of auxiliary winding, the magnetic conductive area of two sections of windings 322A, 322B can be increased, under former secondary misalignment, improve the coupling coefficient between former limit winding and auxiliary winding each section of winding, thus make the utilance of auxiliary winding reach best.
embodiment four:
Fig. 5 is the structural representation of non-contact transformer of the present invention 4th embodiment, as shown in Figure 5, in 4th embodiment, the structure of former limit magnetic core 110 and secondary magnetic core 120 is two side columns (former limit magnetic core side column 110A and secondary magnetic core side column 120A) bottom along the abducent edge expansion type of side, and former limit winding 111 is by point forward to connect around two parts winding on two magnetic core side columns or heteropleural is formed in parallel; Vice-side winding comprises secondary main winding 121 (lower not shown in Fig. 5) and additional auxiliary winding 422.Thus form the non-contact transformer of additional auxiliary winding of the present invention.
Auxiliary winding 422 is divided into two sections, two sections of windings 422A, 422B of the auxiliary winding of composition are quadrangle at the plane geometric shape of air gap vertical direction, and it is not mutually overlapping between two sections of windings, but overlapping with two sections of windings section of secondary main winding, auxiliary winding is positioned at outside the air gap of secondary main winding.Two sections of windings 422A, 422B directly export separately, form two output units.Assist two sections of winding 422A, 422B horizontal windings of winding built in secondary core center region, and symmetrical in the x-direction.Two sections of windings 422A, 422B formed coil plane the relative secondary main winding of the central axis in y direction two sections of windings form the central axis of coil plane in y direction in the x-direction to off-centring, make the magnetic flux coupled characteristic of the magnetic flux coupled characteristic secondary main winding 121 relative to former limit winding 111 of the relatively auxiliary winding 422 of former limit winding 111 different, under avoiding transversion malposition condition, secondary main winding is in the inactivity transmission situation responded to blind spot and occur.Two output units of auxiliary winding and secondary main winding connected in series or in parallel after, then to export after rectification.Auxiliary winding and secondary main winding export connected mode and make former secondary magnetic core just inconsistent to the magnetic flux coupling effect of former limit winding and two sections of auxiliary windings in situation, and the power delivery capabilities being still secondary main winding time just pair accounts for leading.
The flow direction change that in the present embodiment, the former limit excitation of the non-contact transformer of auxiliary winding construction edge expanding type structure produces, thus it is inside that the flow direction that the magnetic flux that former secondary magnetic core is just producing former limit excitation in situation is coupled to one section of auxiliary winding is vertical paper, it is outside that the flow direction being coupled to another section of auxiliary winding is vertical paper, two sections of winding 422A, 422B independently exports, all non-vanishing with the coupling coefficient of former limit winding separately, but by assisting the array output of winding and secondary main winding, make former secondary magnetic core just to two sections of winding 422A of winding auxiliary under condition, 422B magnetic flux coupling effect is different.But when there is angle skew, 90 ° are offset for extreme case angle, the magnetic flux that the excitation of former limit produces be coupled to each section of auxiliary winding into and out of magnetic flux cancel out each other, two sections of windings 422A, 422B are zero with the coupling coefficient of former limit winding 111 separately, visible the present embodiment is applicable to compensate the secondary main winding power output under former secondary transversion malposition condition, reduces non-contact transformer output characteristic to the sensitiveness of former and deputy limit transversion malposition.
embodiment five:
Fig. 6 is the structural representation of non-contact transformer of the present invention 5th embodiment, as shown in Figure 6, in 5th embodiment, the structure of former limit magnetic core 110 and secondary magnetic core 120 is two side columns (former limit magnetic core side column 110A and secondary magnetic core side column 120A) bottom along the abducent edge expansion type of side, and former limit winding 111 is by point forward to connect around two parts winding on two magnetic core side columns or heteropleural is formed in parallel; Vice-side winding comprises secondary main winding 121 (lower not shown in Fig. 6) and additional auxiliary winding 522.Thus form the non-contact transformer of additional auxiliary winding of the present invention.
Auxiliary winding 522 is divided into two sections, two sections of windings 522A, 522B of the auxiliary winding of composition are quadrangle at the plane geometric shape of air gap vertical direction, and it is not mutually overlapping between two sections of windings, but overlapping with two sections of windings section of secondary main winding, auxiliary winding is positioned at outside the air gap of secondary main winding.Two sections of horizontal coilings of winding 522A, 522B of auxiliary winding, are symmetrically distributed in secondary magnetic core both sides in the x-direction, and part covers secondary two magnetic core side column.Two sections of windings 522A, 522B formed the central axis of coil plane in y direction relative to secondary main winding two sections of windings form coil plane and offset to both sides in the x-direction at the central axis in y direction, make the magnetic flux coupled characteristic of the magnetic flux coupled characteristic secondary main winding 121 relative to former limit winding 111 of the relatively auxiliary winding 522 of former limit winding 111 different, avoid secondary main winding under transversion malposition condition, be in the inactivity transmission situation of induction blind spot appearance.Two sections of winding 522A, 522B differential concatenations, form an output unit.The output of auxiliary winding and secondary main winding, respectively after rectification, according to the demand of load voltage or electric current, then adopts the mode of serial or parallel connection to be added in load.
The connected mode of auxiliary winding two sections of winding differential concatenations, make former secondary magnetic core just inconsistent to the magnetic flux coupling effect of former limit winding and two sections of auxiliary windings in situation, and then make former secondary just under condition primary current produce magnetic flux be coupled to auxiliary winding into and out of magnetic flux cancel out each other, be zero with the coupling coefficient of former limit winding, do not affect the power delivery capabilities of secondary main winding.But along with the intensification of transversion malposition degree, obviously increase because of the prolongation of magnetic flux path and the reduction of effective magnetic conductive area with the magnetoresistive characteristic of magnetic circuit corresponding to that section of auxiliary winding of offset direction homonymy and the flux portion of former limit winding coupled, the magnetic flux density be coupled to is caused to reduce obviously, the magnetoresistive characteristic of another section of auxiliary winding and former limit winding coupled magnetic flux then changes not quite, so the magnetic flux density that additional auxiliary winding two sections of winding coupled arrive is different, can not cancel out each other, coupling coefficient is non-vanishing, has power delivery capabilities.Exported by secondary main winding and auxiliary winding combination, reliably can avoid the inactivity transmission situation responding to the appearance of blind spot place, the power delivery of effective compensation secondary main winding and voltage gain, reduce the dislocation susceptibility of non-contact transformer output characteristic.But when there is angle skew, 90 ° are offset for extreme case angle, the magnetic flux that the excitation of former limit produces be coupled to each section of auxiliary winding into and out of magnetic flux cancel out each other, two sections of windings 522A, 522B are zero with the coupling coefficient of former limit winding 111 separately, visible the present embodiment is applicable to compensate the secondary main winding power output under former secondary transversion malposition condition, reduces non-contact transformer output characteristic to the sensitiveness of former and deputy limit transversion malposition.
embodiment six:
Fig. 7 is the structural representation of non-contact transformer of the present invention 6th embodiment, as shown in Figure 7, in 6th embodiment, the structure of former limit magnetic core 110 and secondary magnetic core 120 is two side columns (former limit magnetic core side column 110A and secondary magnetic core side column 120A) bottom along the abducent edge expansion type of side, and former limit winding 111 is by point forward to connect around two parts winding on two magnetic core side columns or heteropleural is formed in parallel; Vice-side winding comprises secondary main winding 121 (lower not shown in Fig. 7) and additional auxiliary winding 622.Thus form the non-contact transformer of additional auxiliary winding of the present invention.
Auxiliary winding 622 is divided into two sections, two sections of windings 622A, 622B of the auxiliary winding of composition are quadrangle at the plane geometric shape of air gap vertical direction, and it is not mutually overlapping between two sections of windings, but overlapping with two sections of windings section of secondary main winding, auxiliary winding is positioned at inside the air gap of secondary main winding.Two sections of horizontal coilings of winding 622A, 622B of auxiliary winding, are symmetrically distributed in secondary magnetic core both sides in the x-direction, and part covers secondary two magnetic core side column.Two sections of windings 622A, 622B formed the central axis of coil plane in y direction relative to secondary main winding two sections of windings form coil plane and offset to both sides in the x-direction at the central axis in y direction, make the magnetic flux coupled characteristic of the magnetic flux coupled characteristic secondary main winding 121 relative to former limit winding 111 of the relatively auxiliary winding 622 of former limit winding 111 different, avoid the inactivity of secondary main winding sense blind area appearance under transversion malposition condition to transmit situation.Two sections of windings independently export, and form two output units.Two output units of auxiliary winding and secondary main winding connected in series or in parallel after, export after rectification again, its auxiliary winding and secondary main winding export connected mode and make former secondary magnetic core just inconsistent to the magnetic flux coupling effect of former limit winding and two sections of auxiliary windings in situation, thus make auxiliary winding at former secondary just on the power delivery not affecting secondary main winding under condition.Its operation principle is see embodiment four.
embodiment seven:
Fig. 8 is the structural representation of non-contact transformer of the present invention 7th embodiment, as shown in Figure 8, in 7th embodiment, the structure of former limit magnetic core 110 and secondary magnetic core 120 is two side columns (former limit magnetic core side column 110A and secondary magnetic core side column 120A) bottom along the abducent edge expansion type of side, and former limit winding 111 is by point forward to connect around two parts winding on two magnetic core side columns or heteropleural is formed in parallel; Vice-side winding comprises secondary main winding 121 (lower not shown in Fig. 8) and additional auxiliary winding 722.Thus form the non-contact transformer of additional auxiliary winding of the present invention.
Auxiliary winding 722 is divided into two sections, two sections of windings 722A, 722B of the auxiliary winding of composition are quadrangle at the plane geometric shape of air gap vertical direction, and it is not mutually overlapping between two sections of windings, but overlapping with two sections of windings section of secondary main winding, auxiliary winding is positioned at outside the air gap of secondary main winding.Two sections of horizontal coilings of winding 722A, 722B of auxiliary winding, are symmetrically distributed in secondary magnetic core both sides in the x-direction, and part covers secondary two magnetic core side column.Two sections of windings 722A, 722B formed the central axis of coil plane in y direction relative to secondary main winding two sections of windings form coil plane and offset to both sides in the x-direction at the central axis in y direction, make the magnetic flux coupled characteristic of the magnetic flux coupled characteristic secondary main winding 121 relative to former limit winding 111 of the relatively auxiliary winding 722 of former limit winding 111 different, avoid the inactivity of secondary main winding sense blind area appearance under transversion malposition condition to transmit situation.Two sections of winding 722A, 722B homonymies are in parallel, form an output unit, make former secondary magnetic core just inconsistent to the magnetic flux coupling effect of former limit winding and two sections of auxiliary windings in situation.The output of auxiliary winding and secondary main winding, respectively after rectification, according to the demand of load voltage or electric current, then adopts the mode of serial or parallel connection to be added in load.Its operation principle is see enforcement five.
embodiment eight:
Fig. 9 is the structural representation of non-contact transformer of the present invention 8th embodiment, as shown in Figure 9, in 8th embodiment, the structure of former limit magnetic core 110 and secondary magnetic core 120 is two side columns (former limit magnetic core side column 110A and secondary magnetic core side column 120A) bottom along the abducent edge expansion type of side, and former limit winding 111 is by point forward to connect around two parts winding on two magnetic core side columns or heteropleural is formed in parallel; Vice-side winding comprises secondary main winding 121 (lower not shown in Fig. 2) and additional auxiliary winding 822.Thus form the non-contact transformer of additional auxiliary winding of the present invention.
Auxiliary winding 822 is divided into four sections, four sections of windings 822A, 822B, 822C, 822D of the auxiliary winding of composition are quadrangle at the plane geometric shape of air gap vertical direction, four sections of windings are positioned at the zones of different of secondary magnetic core, overlapping with two sections of windings section of secondary main winding, auxiliary winding is positioned at inside the air gap of secondary main winding.Wherein two sections of winding 822C, 822C horizontal windings of auxiliary winding are built in secondary core center region, be symmetrically distributed in secondary magnetic core 120 both sides in the y-direction, other two sections of windings 822A, 822B are symmetrically distributed in secondary magnetic core both sides in the x-direction, part covers secondary two magnetic core side column, and the central axis of the coil plane that formed of 822A, 822B in y direction relative to secondary main winding two sections of windings form coil plane and offset to both sides in the x-direction at the central axis in y direction.Four sections of windings 822A, 822B, 822C, 822D directly export separately, form four output units.The output of auxiliary winding and secondary main winding, respectively after rectification, according to the demand of load voltage or electric current, then adopts the mode of serial or parallel connection to be added in load.
By four of auxiliary winding sections of windings being distributed in the zones of different of secondary magnetic core, realize under different directions and dislocation condition in various degree, the auxiliary winding element of automatic switchover magnetic flux coupling effect the best, compensate the power stage of secondary main winding 121, reduce the sensitiveness of non-contact transformer output characteristic to dislocation, the power output capacity of non-contact transformer can be improved simultaneously.
embodiment nine:
Figure 10 is the structural representation of non-contact transformer of the present invention 9th embodiment, as shown in Figure 10, in 9th embodiment, the structure of former limit magnetic core 110 and secondary magnetic core 120 is two side columns (former limit magnetic core side column 110A and secondary magnetic core side column 120A) bottom along the abducent edge expansion type of side, and former limit winding 111 is by point forward to connect around two parts winding on two magnetic core side columns or heteropleural is formed in parallel; Vice-side winding comprises secondary main winding 121 (in Figure 10, figure below is not shown) and additional auxiliary winding 922.Thus form the non-contact transformer of additional auxiliary winding of the present invention.
Auxiliary winding 922 is divided into two sections, two sections of windings 922A, 922B of the auxiliary winding of composition are quadrangle at the plane geometric shape of air gap vertical direction, and it is not mutually overlapping between two sections of windings, but overlapping with two sections of windings section of secondary main winding, auxiliary winding is positioned at inside the air gap of secondary main winding.Two sections of horizontal coilings of winding 922A, 922B of auxiliary winding, are symmetrically distributed in secondary magnetic core both sides in the x-direction, cover secondary two magnetic core side column completely.Two sections of windings 922A, 922B formed the central axis of coil plane in y direction relative to secondary main winding two sections of windings form coil plane and offset to both sides in the x-direction at the central axis in y direction, make the magnetic flux coupled characteristic of the magnetic flux coupled characteristic secondary main winding 121 relative to former limit winding 111 of the relatively auxiliary winding 922 of former limit winding 111 different, avoid secondary main winding to occur at induction blind spot the situation that inactivity transmits.Two sections of windings 922A, 922B forward connect, and form an output unit.The output of auxiliary winding and secondary main winding, respectively after rectification, according to the demand of load voltage or electric current, then adopts the mode of serial or parallel connection to be added in load.Its operation principle is see embodiment five.
embodiment ten:
Figure 11 is the structural representation of non-contact transformer of the present invention tenth embodiment, as shown in figure 11, in tenth embodiment, the structure of former limit magnetic core 110 and secondary magnetic core 120 is and splices and combines core structure, comprise three magnetic core center pillars (former limit magnetic core center pillar 110A and secondary magnetic core center pillar 120A), and former limit winding 111 is by point to form around three part windings in series on three magnetic core center pillars or in parallel or connection in series-parallel, its connected mode makes three sections of winding forwards couplings; Vice-side winding comprises secondary main winding 121 and additional auxiliary winding 1022.Thus form the non-contact transformer of additional auxiliary winding of the present invention.
Secondary main winding 121 is forward in series around three sections of windings 121A, 121B, 121C on secondary three magnetic core center pillars by dividing, make magnetic core just to the three sections of winding forward couplings of secondary main winding in situation, couples magnetic flux is maximum, coupling coefficient is maximum, the power delivery capabilities of system and efficiency characteristic the best.And along with the intensification of degree of misalignment, magnetic circuit reluctance characteristic variations corresponding to the leakage flux closed through former limit is little, but the magnetoresistive characteristic of magnetic circuit then obviously increases because of the prolongation of magnetic flux path and the remarkable reduction of effective magnetic conductive area corresponding to the flux portion of former secondary coupling, coupling coefficient is caused to reduce obviously, under large offset conditions, secondary main winding be coupled to into and out of magnetic flux there will be situation about offsetting completely, and then make coupling coefficient almost nil, lose power delivery capabilities.Auxiliary winding 1022 is divided into three sections, and three sections of windings 1022A, 1022B, 1022C be circle at the plane geometric shape of air gap vertical direction, and inside the air gap being positioned at secondary main winding.Three sections of windings divide around on secondary magnetic core center pillar, and differential concatenation connects, and forms an output unit.The output of auxiliary winding and secondary main winding, respectively after rectification, according to the demand of load voltage or electric current, then adopts the mode of serial or parallel connection to be added in load.
The winding connection of three sections of windings 1022A, 1022B, 1022C of auxiliary winding 1022 makes magnetic core just inconsistent to the magnetic flux coupling effect of former limit winding and three sections of auxiliary windings in situation, and then make former secondary just under condition primary current produce magnetic flux be coupled to additional auxiliary winding into and out of magnetic flux cancel out each other, be approximately zero with the coupling coefficient of former limit winding, do not affect the power delivery capabilities of secondary main winding.But along with the intensification of degree of misalignment, obviously increase because of the prolongation of magnetic flux path and the reduction of effective magnetic conductive area with the magnetoresistive characteristic of magnetic circuit corresponding to the flux portion of a section of offset direction homonymy or two sections of auxiliary windings and former limit winding coupled, the magnetic flux density be coupled to is caused to reduce obviously, then change not quite with one section of offset direction heteropleural or the magnetoresistive characteristic of two sections of auxiliary windings and former limit winding coupled magnetic flux, so the magnetic flux density that additional auxiliary winding three sections of winding coupled arrive is different, can not offset completely, coupling coefficient is non-vanishing, there is power delivery capabilities.Exported by secondary main winding and additional auxiliary winding combination, reliably can avoid the inactivity transmission situation responding to the appearance of blind spot place, the power delivery of effective compensation secondary main winding and voltage gain, reduce the dislocation susceptibility of non-contact transformer output characteristic.
embodiment 11:
Figure 12 is the structural representation of non-contact transformer the 11 embodiment of the present invention, as shown in figure 12, in 11 embodiment, the structures to form combined magnet core structure of former limit magnetic core 110 and secondary magnetic core 120, comprise three magnetic core center pillars (former limit magnetic core center pillar 110A and secondary magnetic core center pillar 120A), and former limit winding 111 is by point to form around three part windings in series on three magnetic core center pillars or in parallel or connection in series-parallel, its connected mode makes three sections of winding forwards couplings; Vice-side winding comprises secondary main winding 121 and additional auxiliary winding 1122.Thus form the non-contact transformer of additional auxiliary winding of the present invention.
Secondary main winding 121 is forward in series around three sections of windings 121A, 121B, 121C on secondary three magnetic core center pillars by dividing, make magnetic core just to the three sections of winding forward couplings of secondary main winding in situation, auxiliary winding 1122 is single winding, be circular at the plane geometric shape of air gap vertical direction, and auxiliary winding technique is in secondary core center region, overlapping with three sections of windings section of secondary main winding.The output of auxiliary winding and secondary main winding, respectively after rectification, according to the demand of load voltage or electric current, then adopts the mode of serial or parallel connection to be added in load.
embodiment 12:
Figure 13 is the structural representation of non-contact transformer the 12 embodiment of the present invention, and as shown in figure 13, in the 12 embodiment, the structure of former limit magnetic core 110 and secondary magnetic core 120 is E-type magnetic cored structure, and former limit winding 111 is formed by single winding technique; Vice-side winding comprises secondary main winding 121 and additional auxiliary winding 1222.Thus form the non-contact transformer of additional auxiliary winding of the present invention.
Secondary main winding is single winding technique, and make former secondary just maximum to secondary main winding in situation and former limit winding coupled magnetic flux, coupling coefficient is maximum, the power delivery capabilities of system and efficiency characteristic best.And along with the intensification of degree of misalignment, magnetic circuit reluctance characteristic variations corresponding to the leakage flux closed through former limit is little, but the magnetoresistive characteristic of magnetic circuit then obviously increases because of the prolongation of magnetic flux path and the remarkable reduction of effective magnetic conductive area corresponding to the flux portion of former secondary coupling, coupling coefficient is caused to reduce obviously, to affect output voltage gain and power delivery capabilities.Auxiliary winding 1222 is divided into two sections, and two sections of windings 1222A, 1222B are symmetrically distributed in secondary magnetic core both sides in the x-direction, partly overlap with secondary main winding, and inside the air gap being positioned at secondary main winding.Two sections of windings are forward connected, and form an output unit.The output of auxiliary winding and secondary main winding, respectively after rectification, according to the demand of load voltage or electric current, then adopts the mode of serial or parallel connection to be added in load.
The connected mode that auxiliary winding two sections of windings are forward connected, make former secondary magnetic core just inconsistent to the magnetic flux coupling effect of former limit winding and two sections of auxiliary windings in situation, and then make former secondary just under condition primary current produce magnetic flux be coupled to additional auxiliary winding into and out of magnetic flux cancel out each other, be zero with the coupling coefficient of former limit winding, do not affect the power delivery capabilities of secondary main winding.But along with the intensification of degree of misalignment, obviously increase because of the prolongation of magnetic flux path and the reduction of effective magnetic conductive area with the magnetoresistive characteristic of magnetic circuit corresponding to that section of auxiliary winding of offset direction homonymy and the flux portion of former limit winding coupled, the magnetic flux density be coupled to is caused to reduce obviously, the magnetoresistive characteristic of another section of auxiliary winding and former limit winding coupled magnetic flux then changes not quite, so the magnetic flux density that additional auxiliary winding two sections of winding coupled arrive is different, can not cancel out each other, coupling coefficient is non-vanishing, has power delivery capabilities.Exported by secondary main winding and additional auxiliary winding combination, reliably can avoid the inactivity transmission situation responding to the appearance of blind spot place, the power delivery of effective compensation secondary main winding and voltage gain, reduce the dislocation susceptibility of non-contact transformer output characteristic.
Embodiment 13:
Figure 14 is the structural representation of non-contact transformer the 13 embodiment of the present invention, and as shown in figure 14, in the 13 embodiment, former limit magnetic core, former limit winding, vice-side winding are identical with the second embodiment, but the segmentation winding method of auxiliary winding 1322 is different.Auxiliary winding 1322 adopts distributed winding method, and each circle is one section, subregion arranges, forward connects.As shown in figure 14, auxiliary winding 1322 coiling plane laying in the y-direction simultaneously.The direction that winding is laid is not limited to y direction, can coiling one edge any direction solid extend.Like this, the auxiliary winding of distributed arrangement just can adapt to different dislocation conditions, with main winding array output, avoids the inactivity transmission situation responding to the appearance of blind spot place, the power delivery of effective compensation secondary main winding and voltage gain, reduce the dislocation susceptibility of non-contact transformer output characteristic.
test case one:
For verifying feasibility of the present invention, for non-contact transformer shown in accompanying drawing 2, carry out experimental verification.Wherein auxiliary winding technique is inside secondary main winding air gap, and the former limit winding of non-contact transformer, secondary main winding and auxiliary winding all adopt Lize wire-wound system.The design parameter of the present embodiment is as following table:
Figure below gives the transformer parameter of testing under different offset direction and recording:
In table, lprepresent former limit winding self-induction, lsrepresent vice-side winding self-induction, l u1 represent auxiliary winding wherein one section of winding self-induction, l u2 represent auxiliary winding another section of self-induction, m p_s represent the mutual inductance between former limit winding and vice-side winding, m p_U1 represent the mutual inductance between former limit winding and auxiliary winding U1, m p_U2 represent the mutual inductance between former limit winding and auxiliary winding U2, k p_s represent the coupling coefficient between former limit winding and vice-side winding, k p_U1 represent the coupling coefficient between former limit winding and auxiliary winding U1, k p_U2 represent the coupling coefficient between former limit winding and auxiliary winding U2.
。shown by the test result of upper table, non-contact transformer of the present invention can the misalignment of self adaptation all directions, when the dislocation of different dislocation direction occurs former secondary, all has one section or two sections of auxiliary windings to there is reasonable magnetic flux with former limit winding and is coupled.
test case two:
Below for the non-contact transformer of the additional auxiliary winding shown in Fig. 6, utilize commercial finite element emulation software Ansoft 2D, the non-contact transformer specifically describing additional auxiliary winding construction proposed by the invention reduces the principle that non-contact transformer exports the susceptibility to dislocation.Suppose that the test condition emulated is: air gap (6mm), turn ratio (20:20), core material (ferrite) and exciting current (10A).Former limit winding is represented with Primary in figure, Secondary represents the vice-side winding of existing non-contact transformer, Secondary_DD represents the secondary main winding of the non-contact transformer of additional auxiliary winding of the present invention, and Secondary_U represents the auxiliary winding of the non-contact transformer of additional auxiliary winding of the present invention.
Figure 15 (a) and Figure 15 (b) is respectively the transient magnetic field analogous diagram of the non-contact transformer of existing edge expansion type structure, former secondary inductance simulation value and coupling coefficient calculated value, and Figure 15 (c) and Figure 15 (d) is respectively the transient magnetic field analogous diagram of the non-contact transformer of the additional auxiliary winding construction of edge expansion type structure of the present invention, former secondary inductance simulation value and coupling coefficient calculated value.At same air gap, winding wire diameter, the number of turn, under the condition of core material and exciting current, from the simulation result of Figure 15 (b) and Figure 15 (d), the coupling coefficient (0.7226) of its former secondary of existing non-contact transformer and the former limit of non-contact transformer of additional auxiliary winding of the present invention and coupling coefficient (0.72278) approximately equal of secondary main winding, the additional former limit of non-contact transformer of winding and the coupling coefficient (0.00149) of auxiliary winding of assisting of the present invention is approximately zero simultaneously, that is, the non-contact transformer of additional auxiliary winding of the present invention former secondary magnetic core just pair time, the magnetic flux coupling effect of former limit winding and two sections of auxiliary windings is inconsistent, and then make just at former secondary the magnetic flux that primary current under condition produces to be coupled to additional auxiliary winding and to enter, the magnetic flux gone out is cancelled out each other, zero is approximately with the coupling coefficient of former limit winding, do not affect the power delivery capabilities of secondary main winding.
Figure 16 (a) and Figure 16 (b) are respectively the transient magnetic field analogous diagram of non-contact transformer in former and deputy limit relative position generation transversion malposition situation of existing edge expansion type structure, the simulation value of former secondary inductance and coupling coefficient calculated value, and Figure 16 (c) and Figure 16 (d) is respectively transient magnetic field analogous diagram, former secondary inductance simulation value and the coupling coefficient calculated value of non-contact transformer in former and deputy limit relative position generation transversion malposition situation of the additional auxiliary winding of edge expansion type structure of the present invention.At same air gap, winding wire diameter, the number of turn, core material, under the condition of exciting current and dislocation distance, from the simulation result of Figure 16 (b) and Figure 16 (d), former, when secondary transversion malposition distance reaches 1/3 of its whole magnetic core size, the coupling coefficient (0.00542) of its former secondary of existing non-contact transformer is approximately zero, the former limit of non-contact transformer and the coupling coefficient (0.00502) of main winding of additional auxiliary winding of the present invention are also approximately zero, but the coupling coefficient of former limit and auxiliary winding (0.1945) is non-vanishing, that is, along with former, the intensification of secondary transversion malposition degree, the useful flux of auxiliary winding linkage increases, increase with the coupling coefficient of former limit winding, exported by secondary main winding and additional auxiliary winding combination, reliably can avoid the inactivity transmission situation responding to the appearance of blind spot place, the power delivery of effective compensation secondary main winding and voltage gain, reduce the dislocation susceptibility of non-contact transformer output characteristic.
test case three:
This test case, with reference to the non-contact transformer of the additional auxiliary winding shown in accompanying drawing 6, has carried out output voltage gain test.Wherein auxiliary winding technique is inside the air gap of secondary main winding, and the former limit winding of non-contact transformer, secondary main winding and auxiliary winding all adopt Lize wire-wound system.
Figure 17 is the non-contact transformer secondary main winding of additional auxiliary winding of the present invention and auxiliary winding combination output circuit structure figure.The non-contact transformer secondary main winding that Figure 17 (a) is additional auxiliary winding of the present invention and the output circuit structure figure that connects after auxiliary winding rectification, Figure 17 (b) is Parallel opertation circuit structure diagram after the non-contact transformer secondary main winding of additional auxiliary winding of the present invention and auxiliary winding rectification, Figure 17 (c) is rectifying output circuit structure chart after the non-contact transformer secondary main winding of additional auxiliary winding of the present invention and auxiliary winding serial, Figure 17 (d) is rectifying output circuit structure chart after the non-contact transformer secondary main winding of additional auxiliary winding of the present invention and auxiliary winding parallel.In figure, l dD for non-contact transformer secondary main winding self-induction, c dD for main winding Shunt compensation capacitor, l f for output inductor, c o for output filter capacitor, l u for non-contact transformer assists winding self-induction, c u for auxiliary winding parallel building-out capacitor, r l for system load.
For verifying feasibility of the present invention further, for the non-contact transformer of auxiliary winding additional shown in Fig. 6, experimental verification has been carried out for two kinds of array output topologys shown in Figure 17 (a), Figure 17 (b), experiment topology adopt string and compensating network, transformer primary secondary just to parameter under condition as following table:
Figure 18 gives the non-contact transformer experimental curve diagram of additional auxiliary winding of the present invention.In figure, DD represents secondary main winding, and U represents additional auxiliary winding.DD curve is the single channel output voltage gain curve of secondary main winding, U curve represents additional auxiliary winding single channel output voltage gain curve, DDU curve of connecting represents additional auxiliary winding and curve of output of connecting after the rectification of secondary main winding, and DDU parallel connection curve represents Parallel opertation curve after additional auxiliary winding and the rectification of secondary main winding.As can be seen from Figure 18, along with former secondary transversal displacement strengthens, secondary main winding output voltage gain increases, but along with the further intensification of degree of misalignment, there will be sense blind area, now main winding output voltage gain sharply reduces to zero, has a strong impact on output stability and the whole efficiency of converter, exacerbates the complexity of the control strategy of noncontact converter simultaneously.Secondary assists the stable increase along with the increasing of former secondary transversal displacement of winding output voltage gain, by secondary main winding and auxiliary winding combination are exported, exported by secondary main winding and additional auxiliary winding combination, reliably can avoid the inactivity transmission situation responding to the appearance of blind spot place, the power delivery of effective compensation secondary main winding and voltage gain, reduce the dislocation susceptibility of non-contact transformer output characteristic.
The above, be only preferred embodiments of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. a non-contact transformer, comprises former limit magnetic core, former limit winding, secondary magnetic core and vice-side winding; It is characterized in that,
Described non-contact transformer vice-side winding comprises secondary main winding and auxiliary winding, and this auxiliary winding adopts two-part or multisection type, and each section of winding of auxiliary winding be overlapping with secondary main winding, partly overlap or not overlapping coiling.
2. non-contact transformer according to claim 1, is characterized in that, each section of winding of described auxiliary winding directly exports or each section of winding is interconnected rear output, forms several output units; The mode that is interconnected of described each section of winding adopts series, parallel or connection in series-parallel;
Several output units described and the array output of secondary main winding, its array output mode adopts series, parallel or connection in series-parallel to connect, then exports after rectification, or array output mode adopt rectification after series, parallel or connection in series-parallel export again.
3. non-contact transformer according to claim 1 and 2, it is characterized in that, described auxiliary winding is preferably two sections of windings, two sections of winding constructions are identical, and longitudinally symmetry is wound on secondary magnetic core both sides, two sections of windings directly export, and form two output units, and export with secondary main winding serial or parallel connection after rectification.
4. non-contact transformer according to claim 1, it is characterized in that, described former limit winding and secondary main winding are single winding, two sections of windings or multistage winding, every section of winding forms a pole regions, former/secondary each section of windings in series, parallel connection or connection in series-parallel be connected to form one or more former/vice-side winding.
5. non-contact transformer according to claim 1, it is characterized in that, each section of winding of described auxiliary winding can be expanded along any direction of the plane perpendicular to air gap, each section of winding of auxiliary winding is being triangle, quadrangle, circle, fan-shaped, polygon perpendicular to the geometry in the plane of air gap, or more the combination of shape.
6. the non-contact transformer according to any one of claim 1 ~ 5, it is characterized in that, the structure of described former limit magnetic core and/or secondary magnetic core can be selected: U-shaped, I type, column bottom, both sides are along the combination of the abducent edge expansion type of side, cross or above-mentioned shape.
7. the non-contact transformer according to any one of claim 1 ~ 5, is characterized in that, described former limit magnetic core and secondary magnetic core all can be selected monoblock magnetic core or adopt array method assembling combination to form by polylith magnetic core.
8. non-contact transformer according to claim 7, is characterized in that, described former limit magnetic core and secondary magnetic core all can select permeability magnetic material silicon steel sheet, ferrite, amorphous, crystallite, ultracrystallite, permalloy or powder core material to make; Or non-magnet material air, pottery, epoxy or plastics are made; Or combined by one or more permeability magnetic materials and/or one or more non-magnet materials and realize.
9. the non-contact transformer according to any one of claim 1 ~ 5, is characterized in that, the wire of described former limit winding, secondary main winding and auxiliary winding all can select solid conductor, Litz line, copper sheet, copper pipe, or PCB winding.
10. the non-contact transformer according to any one of claim 1 ~ 5, it is characterized in that, be provided with magnetic masking layer outside described former limit and/or secondary, this magnetic masking layer adopts barricade, paper tinsel, film or the gauze screen woven by shielding material or shielding cloth to make;
The material of described magnetic masking layer adopts magnetic material powder core, magnetic thin film, ferrite, amorphous, crystallite, ultracrystallite or permalloy to make; Or adopt conduction non-magnetic metal material of copper, silver, aluminium or lead to make;
When outside the magnetic core of described former limit, magnetic masking layer adopts shielding of magnetic material powder core, magnetic thin film, ferrite, amorphous, crystallite, ultracrystallite or permalloy, former limit masked segment is not connected with former limit magnetic core.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106449051A (en) * 2016-10-20 2017-02-22 北京理工大学 Integrated type non-contact transformer
CN107564724A (en) * 2017-10-27 2018-01-09 厦门振泰成科技有限公司 A kind of multistation loader of permalloy magnetic core
CN109427465A (en) * 2017-08-28 2019-03-05 特变电工智能电气有限责任公司 A tractor serves several purposes dry-type transformer
WO2021057706A1 (en) * 2019-09-23 2021-04-01 Ningbo Geely Automobile Research & Development Co., Ltd. Device for wireless power transfer system for charging vehicle

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