CN104319076B - A kind of non-contact transformer - Google Patents
A kind of non-contact transformer Download PDFInfo
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- CN104319076B CN104319076B CN201410528572.7A CN201410528572A CN104319076B CN 104319076 B CN104319076 B CN 104319076B CN 201410528572 A CN201410528572 A CN 201410528572A CN 104319076 B CN104319076 B CN 104319076B
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Abstract
The invention discloses a kind of non-contact transformer, its secondary magnetic core includes the extension of existing basic structure and the present invention, and wherein extension magnetic core can be along the three-dimensional extension in three-dimensional any combination direction.Pass through the asymmetric core structure of the present invention, increase the extension of secondary magnetic core, to directly the magnetic flux path via secondary coupling closure is provided via the scattered magnetic flux in part of primary side closure originally, the magnetic resistance on former secondary Coupled Magnetic Path is reduced, improves the coefficient of coup of non-contact transformer；And, the increase of asymmetric former secondary core structure, secondary magnetic core horizontal area, the coupling path that magnetic flux provide a low magnetic resistance will be dissipated to the part of external diffusion when the former secondary positions such as air gap change, generation dislocation change to script, weakening degree of situations such as the counteracting air gap increase, dislocation to a certain extent to the coefficient of coup, so as to reduce the dislocation susceptibility of non-contact transformer.Occasion is transmitted suitable for most of non-contact type electric energies.
Description
Technical field
The present invention relates to non-contact power technology, the non-contact transformer of espespecially a kind of asymmetric core structure.
Background technology
Non-contact power realizes " wireless power " using magnetic coupling, i.e., the non-contact transformation being kept completely separate using former secondary
Device, pass through the coupled transfer electric energy of high frequency magnetic field so that primary side (supply side) and secondary (electricity consumption side) in energy transfer process
It is not physically connected.Compared with traditional contact power supply, non-contact power is easy to use, safe, no-spark and Danger Electric shock risk, nothing
Laying dust and contact loss, no mechanical wear and corresponding maintenance issues, a variety of bad weathers and environment are suitable for, be easy to implement certainly
Dynamic power supply, has a good application prospect.
Although non-contact power technology is easy to use, advantages, it is low compared to existing for close coupling transformer
The shortcomings that coupling, big leakage inductance, but reduces system effectiveness, while also constrains the promotion and application of non-contact power technology.It is relevant
Loss test and analysis result show：Under full load conditions, the loss of transformer accounts for more than the 70% of system total losses.It is and existing
Explicitly pointed out in technology, to improve the efficiency of transmission of transformer, the coefficient of coup of transformer must be improved as far as possible.As can be seen here, carry
The coefficient of coup of high non-contact transformer is the key for improving contactless system efficiency.
In order to obtain high coupling coefficient, at present, more non-contact transformer structures using planarization, and utilize high magnetic conduction
The magnetic core of rate controls magnetic flux path to realize.Wherein, the non-contact transformer structure of planarization can increase the right opposite of transformer
Product, the magnetic resistance of non-contact transformer original secondary Coupled Magnetic Path will not be excessive during so as to ensure big air gap, improves as much as possible non-
Contact the coefficient of coup of transformer.In addition, under conditions of certain planar dimension, magnetic flux is controlled using the magnetic core of high permeability
Path is another effective ways for improving the non-contact transformer coefficient of coup.
In two non-contact transformations of raising of the core material control magnetic flux path based on planarizing and using high permeability
Under the basic ideas of the device coefficient of coup, pertinent literature gives the optimization design structure of a variety of non-contact transformers, substantially wraps
Include：Using magnetic core dividing method on the basis of keeping the coefficient of coup almost unchanged, solves entire area laying magnetic core weight
The problem of excessive.Also document shows, by the winding construction of planarization and the core structure of edge expansion type, limited
The coefficient of coup of non-contact transformer is optimized in size, obtains the preferable coefficient of coup.However, when transformer primary secondary
Relative position changes, and each parameter of transformer can vary widely, so as to influence the whole efficiency of converter.Therefore, it is non-to connect
Thixotroping depressor will not only improve the coefficient of coup under the conditions of big air gap as far as possible, also reduce the former and deputy side of non-contact transformer as far as possible
Relative position its parameter when changing variable quantity, that is, reduce sensitiveness of the non-contact transformer parameter to dislocation.
The content of the invention
In order to solve the above-mentioned technical problem, the present invention provides a kind of non-contact transformer, it is possible to increase non-contact transformer
The coefficient of coup, while reduce the dislocation susceptibility of non-contact transformer.
In order to reach the object of the invention, the invention provides a kind of non-contact transformer, including primary side magnetic core, primary side around
Group, secondary magnetic core, vice-side winding；Wherein, primary side winding and vice-side winding, which are divided to, is wound on two magnetic core side columns, and two magnetic core sides
Two parts winding on post is forward connected into a primary side winding and a vice-side winding；
The secondary magnetic core includes existing basic structure and extension, and the wherein magnetic core of extension is any along three-dimensional
The three-dimensional extension of combinations of directions.
The extension includes one or more.
The plane geometric shape of the air gap vertical direction of the extension is triangle or quadrangle or circular or fan
Shape or polygon, or its any combination shape.
The extension covering is positioned at the air gap outside of the vice-side winding or inner side.
Vice-side winding described in the extension covering part, or the vice-side winding is completely covered.
There are air gap or air-gap-free between the basic structure of the extension and the secondary magnetic core.
The basic structure of the primary side magnetic core and/or secondary magnetic core is：Using U-shaped, and/or I types, and/or two side column bottoms
Portion is along the abducent edge expansion type in side.
The primary side magnetic core and/or secondary magnetic core are realized by monoblock magnetic core, or are spelled by polylith magnetic core using array method
Dress combines.
The primary side magnetic core and/or secondary magnetic core using silicon steel sheet or ferrite or amorphous or crystallite or ultracrystallite,
Or permalloy or powder core material, or combinations thereof realizes.
The wire of the primary side winding and the vice-side winding selects solid conductor or Litz lines or copper sheet or copper pipe,
Or printing board PCB winding.
Magnetic screen is used on the outside of the primary side and/or secondary；
The magnetic shielding material uses powder core or magnetic thin film or ferrite or amorphous or crystallite or ultracrystallite or slope
The not magnetic material of alloy；Or using copper or silver or the conductive but non-magnetic metal material of aluminium or lead, and by its group
Into the plate or paper tinsel or film needed for shielding, or the gauze screen or shielding cloth formed by shielding material braiding.
On the outside of the primary side magnetic core using powder core or magnetic thin film or ferrite or amorphous or crystallite or ultracrystallite or
When the magnetic material of permalloy shields；
The primary side masked segment is not attached to primary side magnetic core.
Compared with prior art, the secondary magnetic core of the non-contact transformer of technical scheme includes existing basic knot
The extension of structure and the present invention, wherein extension magnetic core can be along the three-dimensional extensions in three-dimensional any combination direction.Pass through the present invention
Asymmetric core structure, increase secondary magnetic core extension, to originally directly via primary side closure part dissipate magnetic flux
The magnetic flux path via secondary coupling closure is provided, the magnetic resistance on former secondary Coupled Magnetic Path is reduced, improves non-contact change
The coefficient of coup of depressor；Moreover, the increase of asymmetric former secondary core structure, secondary magnetic core horizontal area, to script in gas
Gap change, occur will to dissipate magnetic flux to the part of external diffusion when the former secondary positions such as dislocation change and provide low magnetic resistance
Coupling path, weakening degree of situations such as air gap increases, misplaced to the coefficient of coup is counteracted to a certain extent, so as to reduce
The dislocation susceptibility of non-contact transformer.Occasion is transmitted suitable for most of non-contact type electric energies.
Other features and advantages of the present invention will be illustrated in the following description, also, partly becomes from specification
Obtain it is clear that or being understood by implementing the present invention.The purpose of the present invention and other advantages can be by specification, rights
Specifically noted structure is realized and obtained in claim and accompanying drawing.
Brief description of the drawings
Accompanying drawing described herein is used for providing a further understanding of the present invention, forms the part of the application, this hair
Bright schematic description and description is used to explain the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings：
Fig. 1 is the structural representation of non-contact transformer first embodiment of the present invention；
Fig. 2 is the structural representation of non-contact transformer second embodiment of the present invention；
Fig. 3 is the structural representation of non-contact transformer 3rd embodiment of the present invention；
Fig. 4 is the structural representation of non-contact transformer fourth embodiment of the present invention；
Fig. 5 is the structural representation of the embodiment of non-contact transformer the 5th of the present invention；
Fig. 6 is the structural representation of non-contact transformer sixth embodiment of the present invention；
Fig. 7 is the structural representation of the embodiment of non-contact transformer the 7th of the present invention；
Fig. 8 is the structural representation of the embodiment of non-contact transformer the 8th of the present invention；
Fig. 9 is the structural representation of the embodiment of non-contact transformer the 9th of the present invention；
Figure 10 (a) is the magnetic field simulation figure of the non-contact transformer of the symmetrical core structure of existing edge expansion type structure；
Figure 10 (b) is the coupling on the former and deputy side of non-contact transformer of the symmetrical core structure of existing edge expansion type structure
Coefficient simulation value；
Figure 10 (c) is the magnetic field simulation figure of the non-contact transformer of the asymmetric core structure of the present invention；
Figure 10 (d) is the coefficient of coup simulation value on the former and deputy side of the non-contact transformer of the asymmetric core structure of the present invention；
Figure 11 (a) is that the non-contact transformer of the symmetrical core structure of existing edge expansion type structure is relative on former and deputy side
Magnetic field simulation figure in the case of transversion malposition occurs for position；
Figure 11 (b) is that the non-contact transformer of the symmetrical core structure of existing edge expansion type structure is relative on former and deputy side
Coefficient of coup simulation value in the case of transversion malposition occurs for position；
Figure 11 (c) is that the non-contact transformer of the asymmetric core structure of the present invention occurs laterally in former and deputy side relative position
Magnetic field simulation figure under misalignment；
Figure 11 (d) is that the non-contact transformer of the asymmetric core structure of the present invention occurs laterally in former and deputy side relative position
Coefficient of coup simulation value under misalignment.
Embodiment
For the object, technical solutions and advantages of the present invention are more clearly understood, below in conjunction with accompanying drawing to the present invention
Embodiment be described in detail.It should be noted that in the case where not conflicting, embodiment and embodiment in the application
In feature can mutually be combined.
The non-contact transformer of the asymmetric core structure of the present invention, including primary side magnetic core, primary side winding, secondary magnetic core, pair
Side winding；Wherein, primary side winding and vice-side winding, which are divided to, is wound on two magnetic core side columns, and two parts on two magnetic core side columns around
Group is forward connected into a primary side winding and a vice-side winding.Moreover, secondary magnetic core includes existing basic structure and Ben Fa
Bright extension, wherein extension magnetic core can be along the three-dimensional extensions in three-dimensional any combination direction.
Wherein, extension includes one or more.
Wherein, the plane geometric shape of the air gap vertical direction of secondary magnetic core extension be triangle or quadrangle or
Circular or fan-shaped or polygon, or its combined shaped.
Wherein, the extension of secondary magnetic core is covered in the air gap outside or inner side of vice-side winding.
Wherein, the vice-side winding of the extension covering part of secondary magnetic core, or cover all vice-side winding.
Wherein, can be with or without air gap between the basic structure of the extension of secondary magnetic core and secondary magnetic core.
Wherein, the basic structure of primary side magnetic core and/or secondary magnetic core can use such as U-shaped, I types and both sides column bottom edge
The modes such as the abducent edge expansion type in side are realized.
Primary side magnetic core and/or secondary magnetic core can be realized by monoblock magnetic core, can also be spelled by polylith magnetic core using array method
Dress combines.Primary side magnetic core and/or secondary magnetic core can use silicon steel sheet or ferrite or amorphous or crystallite or ultra micro
Brilliant or permalloy or powder core material, or the mode such as combinations thereof are realized.
The wire of primary side winding and vice-side winding can select solid conductor or Litz lines or copper sheet or copper pipe, or PCB
Winding.
Can use magnetic screen on the outside of primary side and/or secondary, masked segment material can using powder core or magnetic thin film or
Ferrite or amorphous or crystallite or the magnetic material of ultracrystallite or permalloy, it can also use copper or silver or aluminium or lead
Conductive but non-magnetic metal material, and be made from it shielding needed for plate or paper tinsel or film, or by shielding material braiding and
Into gauze screen or shielding cloth.
If on the outside of primary side magnetic core using powder core or magnetic thin film or ferrite or amorphous or crystallite or ultracrystallite or
The magnetic material of permalloy shields, then, primary side masked segment is not attached to primary side magnetic core, in order to avoid reduce on leakage path
Magnetic resistance.
The non-contact transformer of the present invention is described with reference to specific embodiment.It is non-contact in following examples
Transformer is made up of primary side 101 and secondary 102, air gap 103 between primary side 101 and secondary 102 be present.
Fig. 1 is the structural representation of non-contact transformer first embodiment of the present invention, as shown in figure 1, in first embodiment,
The basic structure of primary side magnetic core 110 and secondary magnetic core 120 is two side columns (primary side magnetic core side column 110A and secondary magnetic core side column
120A) bottom is along the abducent edge expansion type in side, and primary side winding 111 and vice-side winding 121 are wound on two by being divided to
Two parts winding on magnetic core side column is forward in series；Meanwhile secondary magnetic core 120 includes extension 130.Extension
130 only extend to both sides in the x-direction on the basis of the basic structure of secondary magnetic core 120, and both have certain mistake in z directions
Fall.There is the non-contact transformer of asymmetric core structure so as to form primary and secondary side.
The structural representation (figure below in Fig. 1) of the secondary 102 at another visual angle is given in Fig. 1 simultaneously.Wherein, extend
Part 130 extends on the basis of the basic structure of secondary magnetic core 120 to be formed, until covering all vice-side winding 121 in x directions
Part.In the present embodiment, it is assumed that the plane geometric shape of the air gap vertical direction of extension 130 is quadrangle, such as Fig. 1
The shape of shade in figure below, and it is covered in side of the vice-side winding 121 away from air gap 103.Extension 130 and secondary magnetic core
Gapless between 120 basic structure.
Fig. 2 is the structural representation of non-contact transformer second embodiment of the present invention, as shown in Fig. 2 in second embodiment,
The basic structure of primary side magnetic core 110 and secondary magnetic core 120 is two side columns (primary side magnetic core side column 110A and secondary magnetic core side column
120A) bottom is along the abducent edge expansion type in side, and primary side winding 111 and vice-side winding 121 are wound on two by being divided to
Two parts winding on magnetic core side column is forward in series；Meanwhile secondary magnetic core 120 includes extension 230.Extension
230 on the basis of the basic structure of secondary magnetic core 120 only in the y-direction to external expansion, and both have in z directions it is certain straggly
(not shown in Fig. 2).There is the non-contact transformer of asymmetric core structure so as to form primary and secondary side.
The structural representation (figure below in Fig. 2) of the secondary 102 at another visual angle is given in Fig. 2 simultaneously.Wherein, extend
Part 230 extends on the basis of the basic structure of secondary magnetic core 120 to be formed, until covering all vice-side winding 121 in y directions
Part.In the present embodiment, it is assumed that the plane geometric shape of the air gap vertical direction of extension 230 is quadrangle, such as Fig. 2
The shape of shade in figure below, and it is covered in side of the vice-side winding 121 away from air gap.Extension 230 and secondary magnetic core 120
Gap between basic structure be present.
Fig. 3 is the structural representation of non-contact transformer 3rd embodiment of the present invention, as shown in figure 3, in 3rd embodiment,
The basic structure of primary side magnetic core 110 and secondary magnetic core 120 is two side columns (primary side magnetic core side column 110A and secondary magnetic core side column
120A) bottom is along the abducent edge expansion type in side, and primary side winding 111 and vice-side winding 121 are wound on two by being divided to
Two parts winding on magnetic core side column is forward in series；Meanwhile secondary magnetic core 120 includes extension 330.Extension
330 on the basis of the basic structure of secondary magnetic core 120 along x, z direction simultaneously to external expansion, and both have in z directions it is certain
It is straggly.There is the non-contact transformer of asymmetric core structure so as to form primary and secondary side.
The structural representation (figure below in Fig. 3) of the secondary 102 at another visual angle is given in Fig. 3 simultaneously.Wherein, extend
Part 330 extends on the basis of the basic structure of secondary magnetic core 120 to be formed, and covers the vice-side winding 121 of part in x directions
Part.In the present embodiment, it is assumed that the plane geometric shape of the air gap vertical direction of extension 330 is quadrangle, under Fig. 3
The shape of shade in figure, and it is covered in side of the vice-side winding 121 away from air gap.Extension 330 with secondary magnetic core 120
Gapless between basic structure.
Fig. 4 is the structural representation of non-contact transformer fourth embodiment of the present invention, as shown in figure 4, in fourth embodiment,
The basic structure of primary side magnetic core 110 and secondary magnetic core 120 is two side columns (primary side magnetic core side column 110A and secondary magnetic core side column
120A) bottom is along the abducent edge expansion type in side, and primary side winding 111 and vice-side winding 121 are wound on two by being divided to
Two parts winding on magnetic core side column is forward in series；Meanwhile the extension 430 of secondary magnetic core 120 includes the first extension
Part 430A, the second extension 430B, the 3rd extension 430C and the 4th extension 430D.Wherein, the first extension
430A is divided to be extended in the x-direction to both sides on the basis of the basic structure of secondary magnetic core 120, the second extension 430B is in secondary magnetic
Extended on the basis of the basic structure of core 120 along x, z both direction, the 3rd extension 430C is in the basic structure of secondary magnetic core 120
On the basis of in the y-direction to both sides extend, the 4th extension 430D is on the basis of the basic structure of secondary magnetic core 120 along x, y
Both direction extends simultaneously.There is the non-contact transformer of asymmetric core structure so as to form primary and secondary side.
The structural representation (figure below in Fig. 4) of the secondary 102 at another visual angle is given in Fig. 4 simultaneously.Extension
430 extend on the basis of the basic structure of secondary magnetic core 120 and form, wherein, the 4th extension 430D is covered in vice-side winding
The optional position of 121 x/y plane.In the present embodiment, it is assumed that the first extension 430A, the second extension 430B, the 3rd prolong
Extending portion divides 430C, the 4th extension 430D plane geometric shape of air gap vertical direction is quadrangle, under Fig. 4
The shape of shade in figure, and the first extension 430A, the 3rd extension 430C, the 4th extension 430D are covered in secondary
Side of the winding 121 away from air gap, the second extension 430B are located at the outside of vice-side winding 121.First extension 430A,
Gap, the 3rd extension between second extension 430B, the 4th extension 430D and the basic structure of secondary magnetic core 120 be present
Gapless between the basic structure of part 430C and secondary magnetic core 120.
Fig. 5 is the structural representation of the embodiment of non-contact transformer the 5th of the present invention, as shown in figure 5, in the 5th embodiment,
The basic structure of primary side magnetic core 110 and secondary magnetic core 120 is two side columns (primary side magnetic core side column 110A and secondary magnetic core side column
120A) bottom is along the abducent edge expansion type in side, and primary side winding 111 and vice-side winding 121 are wound on two by being divided to
Two parts winding on magnetic core side column is forward in series；Meanwhile the extension 530 of secondary magnetic core 120 includes the first extension
Part 530A, the second extension 530B, the 3rd extension 530C and the 4th extension 530D.Wherein, the first extension
530A is divided to be extended in the x-direction to both sides on the basis of the basic structure of secondary magnetic core 120, the second extension 530B is in secondary magnetic
Extended on the basis of the basic structure of core 120 along x, z both direction, the 3rd extension 530C is in the basic structure of secondary magnetic core 120
On the basis of in the y-direction to both sides extend, the 4th extension 530D is on the basis of the basic structure of secondary magnetic core 120 along x, y
Both direction extends simultaneously.There is the non-contact transformer of asymmetric core structure so as to form primary and secondary side.
The structural representation (figure below in Fig. 5) of the secondary 102 at another visual angle is given in Fig. 5 simultaneously.The present embodiment
In, it is assumed that the individual 4th extension 530D's of the first extension 530A, the second extension 530B, the 3rd extension 530C
The plane geometric shape of air gap vertical direction is quadrangle, as Fig. 5 figure below in shade shape, and the first extension
530A, the 3rd extension 530C, the 4th extension 530D are covered in side of the vice-side winding 121 away from air gap, and second prolongs
Extending portion divides the outside that 530B is located at vice-side winding 121.First extension 530A, the 3rd extension 530C, the 4th extension
Divide gapless between 430D and the basic structure of secondary magnetic core 120, the second extension 530B and secondary magnetic core 120 basic knot
Gap between structure be present.
Fig. 6 is the structural representation of non-contact transformer sixth embodiment of the present invention, as shown in fig. 6, in sixth embodiment,
The basic structure of primary side magnetic core 110 and secondary magnetic core 120 is two side columns (primary side magnetic core side column 110A and secondary magnetic core side column
120A) bottom is along the abducent edge expansion type in side, and primary side winding 111 and vice-side winding 121 are wound on two by being divided to
Two parts winding on magnetic core side column is forward in series；Meanwhile secondary magnetic core 120 includes extension 630.Extension
630 only extend to both sides in the x-direction on the basis of the basic structure of secondary magnetic core 120, and both have certain mistake in z directions
Fall.There is the non-contact transformer of asymmetric core structure so as to form primary and secondary side.
Wherein, extension 630 extends on the basis of the basic structure of secondary magnetic core 120 and formed, until covering all
Vice-side winding 121 is in the part in x directions close to the side of air gap 103.Extension 630 and the basic structure of secondary magnetic core 120
Between gapless.
Fig. 7 is the structural representation of the embodiment of non-contact transformer the 7th of the present invention, as shown in fig. 7, in the 7th embodiment,
The basic structure of primary side magnetic core 110 and secondary magnetic core 120 is U-shaped core structure, and primary side winding 111 and vice-side winding 121
Two parts winding being wound on by being divided on two magnetic core side columns (primary side magnetic core side column 110A and secondary magnetic core side column 120A) is forward
It is in series；Meanwhile secondary magnetic core 120 includes extension 730.Base of the extension 730 in the basic structure of secondary magnetic core 120
Extended in the x-direction to both sides on plinth, and both have necessarily straggly in z directions.So as to form primary and secondary side with not right
Claim the non-contact transformer of core structure.
Wherein, extension 730 extends on the basis of the basic structure of secondary magnetic core 120 and formed, until covering all
Vice-side winding 121 is in the part in x directions.Extension 730 is covered in side of the vice-side winding 121 away from air gap 103.Extension
Divide gapless between 730 and the basic structure of secondary magnetic core 120.
Fig. 8 is the structural representation of the embodiment of non-contact transformer the 8th of the present invention, as shown in figure 8, in the 8th embodiment,
Primary side magnetic core 110 is two side columns (primary side magnetic core side column 110A) bottom along the abducent edge expansion type in side, secondary magnetic core
120 basic structure is I types, and primary side winding 111 and vice-side winding 121 are forward in series by two parts winding；Meanwhile
Secondary magnetic core 120 includes extension 830.Extension 830 can be in the x-direction on the basis of the basic structure of secondary magnetic core 120
To both sides extension, and/or can in the y-direction to both sides extension, and/or can along x, z both direction extend, and/or can be two along x, y
Directional Extension.There is the non-contact transformer of asymmetric core structure so as to form primary and secondary side.Given simultaneously in Fig. 8 another
The structural representation (figure below) of the secondary 102 at one visual angle, extension 830 is as shown in the shape of shade in Fig. 8 figure below, tool
Body repeats no more here.
Fig. 9 is the structural representation of the embodiment of non-contact transformer the 9th of the present invention, as shown in figure 9, in the 9th embodiment,
The basic structure of primary side magnetic core 110 and secondary magnetic core 120 is two side columns (primary side magnetic core side column 110A and secondary magnetic core side column
120A) bottom is along the abducent edge expansion type in side, and primary side winding 111 and vice-side winding 121 are wound on two by being divided to
Two parts winding on magnetic core side column is forward in series；Meanwhile secondary magnetic core 120 includes extension 930.Extension
930 only extend to both sides in the x-direction on the basis of the basic structure of secondary magnetic core 120, and both have certain mistake in z directions
Fall.There is the non-contact transformer of asymmetric core structure so as to form primary and secondary side.
The structural representation (figure below in Fig. 9) of the secondary 102 at another visual angle is given in Fig. 9 simultaneously.Wherein, secondary
Magnetic core 120 is formed by polylith magnetic core using array method assembling combination.
Below by taking the non-contact transformer of the asymmetric core structure shown in Fig. 1 as an example, commercial finite element simulation is utilized
Software Ansoft 2D, specifically describe it and improve the coefficient of coup, reduce original of the non-contact transformer parameter to the susceptibility of dislocation
Reason.Assuming that the test condition of emulation is：Air gap (20mm), turn ratio (12:12), core material (ferrite) and exciting current
(5A)。
Figure 10 (a) and Figure 10 (b) is respectively the non-contact transformer of the symmetrical core structure of existing edge expansion type structure
Magnetic field simulation figure and former and deputy side coefficient of coup simulation value, Figure 10 (c) and Figure 10 (d) are respectively the asymmetric magnetic core of the present invention
The magnetic field simulation figure of the non-contact transformer of structure and the coefficient of coup simulation value on former and deputy side.In same air gap, winding wire
It is existing non-from Figure 10 (b) and Figure 10 (d) simulation result under conditions of footpath, the number of turn, core material and exciting current
The coefficient of coup (0.60062) of its former secondary of contact transformer is less than the coupled systemes of the former secondary of the non-contact transformer of the present invention
Number (0.62804), that is to say, that the part that secondary magnetic core stretches out in asymmetric core structure of the invention further reduces
Air-gap reluctance between transformer primary secondary, adds while couples the magnetic flux of former vice-side winding, and then increase coupled systemes
Number.
Figure 11 (a) and Figure 11 (b) is respectively the non-contact transformer of the symmetrical core structure of existing edge expansion type structure
Magnetic field simulation figure and coefficient of coup simulation value, Figure 11 (c) and Figure 11 in the case of transversion malposition occurs for former and deputy side relative position
(d) be respectively edge expansion type structure of the present invention asymmetric core structure non-contact transformer in former and deputy side relative position
The magnetic field simulation figure and coefficient of coup simulation value in the case of transversion malposition occurs.Transversion malposition occurs in former and deputy side relative position
In the case of magnetic field simulation result.In same air gap, winding wire diameter, the number of turn, core material, exciting current and dislocation distance
Under the conditions of, from Figure 11 (b) and Figure 11 (d) simulation result, the coefficient of coup of its former secondary of existing non-contact transformer
(0.56839) it is less than the coefficient of coup (0.59845) of the former secondary of the non-contact transformer of the present invention ..., that is to say, that this
The dissymmetrical structure of the former and deputy side magnetic core of invention has elongated the length of secondary magnetic core, reduces the air-gap reluctance between former secondary,
The magnetic flux (this part is leakage field) directly closed via primary side is significantly reduced, increases the coefficient of coup.
When working in specified air gap 20cm, system effectiveness is during contactless power supply system power output 1000W
91.25%.When working gas gap becomes greatly to 26cm, when power output maintains 1000W, to asymmetric non-contact using the present invention
Transformer carries out efficiency comparative with traditional edge expansion type non-contact transformer, and specific implementation Contrast on effect is as shown in table 1.
Table 1
Test result as shown in Table 1 is visible, transversion malposition occurs when working gas gap becomes big or former and deputy side, using this
Invent the system that the system effectiveness suppression ratio of the non-contact transformer of design uses traditional edge expansion type non-contact transformer
Efficiency, which declines, to be lacked.In addition, when transformer primary, secondary relative position change, the non-contact transformer of the invention designed
Parameters variation obtain smaller, i.e., the non-contact transformer parameter that designs of the present invention changes more insensitive to former and deputy side position.
It is described above, it is only the preferred embodiments of the present invention, is not intended to limit the scope of the present invention.It is all this
Within the spirit and principle of invention, any modification, equivalent substitution and improvements done etc., the protection model of the present invention should be included in
Within enclosing.
Claims (12)
1. a kind of non-contact transformer, including primary side magnetic core, primary side winding, secondary magnetic core, vice-side winding；Wherein, primary side winding
It is divided to vice-side winding and is wound on two magnetic core side columns, and two parts winding on two magnetic core side columns is forward connected into a primary side
Winding and a vice-side winding；Characterized in that,
The secondary magnetic core includes existing basic structure and extension, and the wherein magnetic core of extension is combined along three-dimensional
The three-dimensional extension in direction；It is described to include along the three-dimensional extension in three-dimensional any combination direction：The edge on the basis of secondary magnetic core basic structure
X, z both directions extend, until covering all vice-side winding in the part in x directions, wherein z directions are perpendicular to secondary magnetic core base
The plane of this structure.
2. non-contact transformer according to claim 1, it is characterised in that the extension includes more than one.
3. non-contact transformer according to claim 2, it is characterised in that the extension is flat on x, y plane
Face geometry is triangle, quadrangle, circle, sector or its any combination shape.
4. non-contact transformer according to claim 2, it is characterised in that the extension covering is located at the secondary
The side of the remote air gap of winding or the side of close air gap.
5. non-contact transformer according to claim 2, it is characterised in that secondary described in the extension covering part
Winding, or the vice-side winding is completely covered.
6. non-contact transformer according to claim 2, it is characterised in that the extension and the secondary magnetic core
There are gap or gapless between basic structure.
7. according to the non-contact transformer described in any one of claim 1~6, it is characterised in that the primary side magnetic core and/or pair
The basic structure of side magnetic core is：Extended using U-shaped, and/or I types, and/or both sides column bottom along the abducent edge in side
Type.
8. according to the non-contact transformer described in any one of claim 1~6, it is characterised in that the primary side magnetic core and/or pair
Side magnetic core is realized by monoblock magnetic core, or is formed by polylith magnetic core using array method assembling combination.
9. non-contact transformer according to claim 8, it is characterised in that the primary side magnetic core and/or secondary magnetic core are adopted
Realized with silicon steel sheet, ferrite, amorphous, crystallite, ultracrystallite, permalloy or powder core material, or combinations thereof.
10. according to the non-contact transformer described in any one of claim 1~6, it is characterised in that the primary side winding and described
The wire of vice-side winding selects solid conductor, Litz lines, copper sheet, copper pipe or printed circuit board (PCB) winding.
11. according to the non-contact transformer described in any one of claim 1~6, it is characterised in that the primary side and/or secondary
Outside uses magnetic screen；
The magnetic shielding material uses the magnetic material of powder core, magnetic thin film, ferrite, amorphous, crystallite, ultracrystallite or permalloy
Material；Or the conductive but non-magnetic metal material using copper, silver, aluminium or lead, and be made from it shielding needed for plate, paper tinsel or
Film, or the gauze screen or shielding cloth formed by shielding material braiding.
12. according to the non-contact transformer described in any one of claim 1~6, it is characterised in that adopted on the outside of the primary side magnetic core
When being shielded with the magnetic material of powder core, magnetic thin film, ferrite, amorphous, crystallite, ultracrystallite or permalloy；
The primary side masked segment is not attached to primary side magnetic core.
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| CN104681248B (en) * | 2015-02-17 | 2017-05-03 | 南京航空航天大学 | Contactless transformer |
| CN104681249B (en) * | 2015-03-09 | 2017-10-31 | 南京航空航天大学 | Modified non-contact transformer with secondary current phase-detection function |
| CN108461264B (en) * | 2018-02-09 | 2020-03-03 | 浙江大学 | Wireless power transmission loose magnetic coupling transformer device with large offset fault tolerance range and circuit thereof |
| CN109435716B (en) * | 2018-12-17 | 2020-04-24 | 哈尔滨工业大学 | Three-pole magnetic coupling mechanism applied to rail transit wireless power supply system |
| CN110380518B (en) * | 2019-07-08 | 2021-08-17 | 浙江大学 | Asymmetric bipolar coil for modularized wireless power transmission system |
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|---|---|---|---|---|
| CN101630577A (en) * | 2009-07-07 | 2010-01-20 | 南京航空航天大学 | Edge expansion type high coupling coefficient non-contact transformer |
| TW201214915A (en) * | 2010-09-24 | 2012-04-01 | Panasonic Elec Works Co Ltd | Non-contact power transmission coil module, battery pack, and charger |
| CN103474213A (en) * | 2013-09-13 | 2013-12-25 | 南京航空航天大学 | Non-contact transformer with mixed wound windings |
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| JPH0878257A (en) * | 1994-09-08 | 1996-03-22 | Kaageo P-Shingu Res Lab:Kk | Primary core of non-contact energy transmission system transformer |
| CN102360781B (en) * | 2011-08-29 | 2013-05-08 | 福州大学 | Separable transformer with magnetic core in nested structure |
| JP6179160B2 (en) * | 2013-03-28 | 2017-08-16 | Tdk株式会社 | Wireless power transmission equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101630577A (en) * | 2009-07-07 | 2010-01-20 | 南京航空航天大学 | Edge expansion type high coupling coefficient non-contact transformer |
| TW201214915A (en) * | 2010-09-24 | 2012-04-01 | Panasonic Elec Works Co Ltd | Non-contact power transmission coil module, battery pack, and charger |
| CN103474213A (en) * | 2013-09-13 | 2013-12-25 | 南京航空航天大学 | Non-contact transformer with mixed wound windings |
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