CN203588822U - Non-contact transformer with hybrid-wound windings - Google Patents
Non-contact transformer with hybrid-wound windings Download PDFInfo
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- CN203588822U CN203588822U CN201320569518.8U CN201320569518U CN203588822U CN 203588822 U CN203588822 U CN 203588822U CN 201320569518 U CN201320569518 U CN 201320569518U CN 203588822 U CN203588822 U CN 203588822U
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Abstract
The utility model provides a non-contact transformer with hybrid-wound windings. The non-contact transformer comprises a primary magnetic core, a primary winding, a secondary magnetic core, a secondary winding and a transformer shielding part. The primary winding or the secondary winding, or each of the primary winding and the secondary winding, is formed by a coil horizontally wound around the side pillar of the corresponding magnetic core and a coil vertically wound around the top pillar of the magnetic core through forward coupling and straight-forward series connection. Due to the adoption of the vertically wound coil, the size and the occupying area of the non-contact transformer can be reduced. The coupling coefficient of the transformer is increased by placing the shielding part at the outer side of the magnetic core of the transformer and increasing the magnetic resistance in a magnetic leakage path corresponding to the vertically wound coil. The magnetic core of the transformer which is formed by jointing and combining a plurality of magnetic cores in an array form is capable of remarkably reducing the weight of the transformer while keeping the high coupling coefficient. The non-contact transformer with the hybrid-wound windings is very advantageous for miniaturization, weight reduction and high efficiency of a non-contact power supply system, and applicable to most non-contact electric energy transmission occasions.
Description
Technical field
The utility model relates to a kind of high coupling coefficient in non-contact electric energy transmission system, non-contact transformer of undersized winding mixing coiling of being applicable to, and belongs to transformer or transformation of electrical energy field.
Background technology
Non-contact power is based on magnetic Field Coupling, to realize the new electric energy transmission mode of " wireless power ", utilize the completely separated non-contact transformer of former secondary, by the coupled transfer electric energy of high frequency magnetic field, make in energy transfer process supply side and electricity consumption side without physical connection.Compare with traditional contact power supply, non-contact power is easy to use, safe, no-spark and Danger Electric shock risk, and without laying dust and contact loss, machinery-free wearing and tearing and corresponding maintenance issues, can adapt to multiple bad weather and environment, is convenient to realize automatic power.Non-contact power technology is because of its distinctive adverse circumstances adaptability, high security, few maintenance and convenience, in the power supply occasion of the mobile devices such as mobile phone, robot, human body implanting device, electric automobile, in oil field, the severe or inflammable and explosive occasion of environment such as mine, underwater power all obtained application.
The shortcoming of current contactless power supply system product ubiquity poor efficiency, the Non-contact mobile phone charger product that NSK-Seiko Epson Corporation, Dongguang company produce of take is example, its conversion efficiency is lower than 40%.G. B. Joung and B. H. Cho, " An energy transmission system for an arti cial heart using leakage inductance compensation of transcutaneous transformer ", IEEE Transactions on Power Electronics, vol.13, no.6, pp.1013-1022, the 60W artificial heart non-contact power supply that November 1998 studies, when air gap is 10mm, converter peak efficiency is 78%.Reason for contactless power supply system poor efficiency, Chun-Hung Hu Ching-Mu Chen Ying-Shing Shiao Tung-Jung Chan Tsair-Rong Chen, " Development of a Universal Contactless Charger for Handheld Devices ", 2008 IEEE, IEEE International Symposium on Industrial Electronics, the articles such as 99-104 all explicitly point out, improve system effectiveness, not only to adopt the large leakage inductance of rational controlled resonant converter to transformer, little magnetizing inductance compensates, also must improve the coupling coefficient of transformer as far as possible.Qianhong Chen, Siu Chung Wong, Chi K. Tse, Xinbo Ruan, " Analysis, Design and Control of a Transcutaneous Power Regulator for Artificial Hearts ", IEEE Transactions on Biomedical Circuits and Systems, 2009,3 (1): loss test and the analysis result of 23-31 show: under full load conditions, the loss of transformer accounts for the more than 70% of transducer loose.As can be seen here, the coupling coefficient of raising non-contact transformer is the key that improves noncontact transducer effciency.
In order to obtain high coupling coefficient, reduce volume of transformer weight simultaneously, patent " edge expansion type high coupling coefficient non-contact transformer; CN200910032016.X " has been invented a kind of edge expansion type high coupling coefficient non-contact transformer, thereby over against area, improves the coupling coefficient that unity couping magnetic flux proportion improves non-contact transformer by improving magnetic core.But the winding of this non-contact transformer all adopts plane winding method, especially the shared area of transformer is larger for the volume of transformer.Nagatsuka Y, Ehara N, Kaneko Y, Abe S, Yasuda T, " Compact contactless power transfer system for electric vehicles ", IEEE IPEC, the non-contact transformer magnetic core that 2010:807-813 proposes adopts planar I type magnetic core, winding becomes around the winding of the vertical coiling of magnetic post, reducing the shared area of transformer, is 0.48 at coupling coefficient when length is 6.6 (length 330mm, air gap 50mm) with air gap ratio.How to improve the coupling coefficient of non-contact transformer, reduce the difficult point that its dimensional weight becomes non-contact transformer design simultaneously as far as possible.
Utility model content
The purpose of this utility model is to have in order to overcome above-mentioned existing non-contact transformer that transformer area occupied is large, coupling coefficient is low, the defect of magnetic core Heavy Weight, provide be beneficial to contactless power supply system miniaturization, the non-contact transformer of the winding mixing coiling that lightweight is used.
The non-contact transformer of winding mixing coiling of the present utility model, comprise former limit magnetic core, former limit winding, secondary magnetic core, secondary winding, Transformer shielding part, it is characterized in that described former limit winding or/and secondary winding is forward in series according to forward coupling with the coil around the vertical coiling of magnetic core fore-set by the coil around the horizontal coiling of magnetic core side column; Transformer shielding is partly arranged in the magnetic core outside of transformer.
Described former limit winding is or/and secondary winding comprises a plurality of windings, and wherein at least one winding is forward in series according to forward coupling with the coil around the vertical coiling of magnetic core fore-set by the coil around the horizontal coiling of magnetic core side column.
Described former limit magnetic core is or/and secondary core structure adopts U-shaped, E type, I type and edge expansion type; The column bottom, both sides that wherein edge expansion type refers to magnetic core is along side to external expansion, and specific definition can be referring to patent " edge expansion type high coupling coefficient non-contact transformer, CN200910032016.X ".
Described former limit magnetic core is or/and secondary magnetic core can also can adopt array method assembling combination form by polylith magnetic core by the realization of monoblock magnetic core.
The geometry of described Transformer shielding part is flat shape or along the three-dimensional shape of magnetic core laminating.
Described Transformer shielding partly adopts the magnetic shielding material of one or several combination of powder core, magnetic thin film, ferrite, amorphous, crystallite, ultracrystallite, permalloy, or adopts the electromagnetic shielding material of one or several combination of copper, silver, aluminium, lead.And by shielding material, formed one or several combination of barricade, curtain, screened film, gauze screen, shielding cloth.
Described magnetic core of transformer adopts ferromagnetic material or nonferromagnetic material.
The wire of described former limit winding and secondary winding is selected solid conductor, Litz line, copper sheet, copper pipe or PCB winding.
The utility model with the technical characteristics that existing non-contact transformer is compared is, by winding arrangement of the present utility model, changes the winding of part plane coiling into vertical coiling, further reduces the size of non-contact transformer and the area taking; By placing masked segment in magnetic core of transformer outside, increase the magnetic resistance on the leakage path that vertical coiling is corresponding, improve the coupling coefficient of transformer; By adopting the magnetic core of transformer that adopts array method assembling combination to form by polylith magnetic core, can when keeping high coupling coefficient, significantly reduce the weight of transformer.Be applicable to most of non-contact type electric energy transmission occasions.
Accompanying drawing explanation
Fig. 1 is that employing edge expansion type core structure, the Transformer shielding in the utility model is partly the former limit of non-contact transformer or the structural representation of secondary (upper figure) and the winding connection diagram (figure below) of the winding mixing coiling of flat shape;
Fig. 2 is that the U-shaped core structure of the employing in the utility model, Transformer shielding are partly the structural representation of the non-contact transformer of the winding mixing coiling of flat shape;
Fig. 3 be magnetic core of transformer one side in the utility model be edge expansion type structure opposite side be I type structure, Transformer shielding part one side be flat shape opposite side is the structural representation of the non-contact transformer of the winding mixing coiling of the three-dimensional shape along magnetic core laminating;
Fig. 4 is that employing E type core structure, the Transformer shielding in the utility model is partly the former limit of non-contact transformer or the structural representation of secondary (upper figure) and the winding connection diagram (figure below) of the winding mixing coiling of flat shape;
Fig. 5 is that employing E type core structure, the Transformer shielding in the utility model is partly the former limit of non-contact transformer of winding mixing coiling flat shape, that comprise two cover independent winding or the structural representation of secondary (upper figure) and winding connection diagram (figure below);
Fig. 6 is that former limit or the secondary magnetic core in the utility model adopts array method assembling combination to form by polylith magnetic core, the former limit of non-contact transformer of the winding mixing coiling that core structure is edge expansion type or the core structure schematic diagram of secondary (upper figure) and winding connection diagram (figure below).
Fig. 7 is the core structure dimensional drawing of non-contact transformer of the mixing coiling of the employing edge expansion type core structure that is applicable to 10mm air gap, 60W power in the utility model;
Fig. 8 is the non-contact transformer (figure below) of winding mixing coiling and the magnetic field simulation comparison diagram of the non-contact transformer (upper figure) of the winding plane coiling of employing edge expansion type structure of employing edge expansion type core structure described in the utility model.
Fig. 9 is transless masked segment (upper figure) and the magnetic field simulation comparison diagram that has the non-contact transformer of Transformer shielding part (figure below).
Figure 10 and Figure 11 are that non-contact transformer of the present utility model is for the electrical block diagram of 2 main circuit topologies of the embodiment of transmitting non-contact electric energy.
Main designation in Fig. 1-11: 1-Transformer shielding part; 2-winding one; 3-winding two;
i-winding current one;
i'-winding current two;
w 2-core length;
f-magnetic core width;
d-magnetic core height;
l-transformer window width;
l al the length of-Transformer shielding part;
v in-DC power supply voltage;
q 1~
q 4-power tube;
d 1~
d 4-diode;
c p-former limit resonant capacitance;
c s-secondary resonant capacitance;
c d1,
c d2-input dividing potential drop electric capacity;
d r1~
d r4-rectifier diode;
c o-output filter capacitor;
r-load;
n p-former limit winding;
n s-secondary winding.
Embodiment
Accompanying drawing is non-limiting discloses several concrete embodiment of the present utility model, by reference to the accompanying drawings the utility model is further described as follows.
Referring to accompanying drawing 1, be that employing edge expansion type core structure, Transformer shielding are partly the former limit of non-contact transformer or the structural representation of secondary (upper figure) and the winding connection diagram (figure below) of the winding mixing coiling of flat shape.In figure below, winding is split into three by one, two ends winding is plane coiling around magnetic core side column, stage casing winding is vertical coiling around magnetic core fore-set, and three part windings are forward connected into a former limit winding or a secondary winding according to the coupling of magnetic flux forward, in three sections of windings that split into, the different name end of adjacent two one of them windings of winding is connected with the Same Name of Ends of another winding, guarantees that the magnetic flux producing in magnetic core strengthens mutually." * " is the Same Name of Ends of three part windings of fractionation.
Referring to accompanying drawing 2, be that to adopt U-shaped core structure, Transformer shielding be partly the structural representation of the non-contact transformer of the winding mixing coiling of flat shape.Its winding connection is with accompanying drawing 1.
Referring to accompanying drawing 3, be magnetic core of transformer one side be edge expansion type structure opposite side be I type structure, Transformer shielding part one side be flat shape opposite side is the structural representation of the non-contact transformer of the winding mixing coiling of the three-dimensional shape along magnetic core laminating.Its winding connection is with accompanying drawing 1.
Referring to accompanying drawing 4, be that employing E type core structure, Transformer shielding are partly the former limit of non-contact transformer or the structural representation of secondary (upper figure) and the winding connection diagram (figure below) of the winding mixing coiling of flat shape.In figure below, winding is split into four by one, and winding part in two ends is plane coiling around magnetic core side column, and middle two sections of windings are vertical coiling around magnetic core fore-set, and four part windings are forward connected into a former limit winding or a secondary winding according to the coupling of magnetic flux forward.
Referring to accompanying drawing 5, be that employing E type core structure, Transformer shielding are partly the former limit of non-contact transformer of winding mixing coiling flat shape, that comprise two cover independent winding or the structural representation of secondary (upper figure) and winding connection diagram (figure below).Nothing electrical connection between double winding in figure, magnetic flux coupling can be forward coupling or reverse coupled.Every cover winding is split into two, one sections of windings by one and is plane coiling around magnetic core side column, and another section of winding is vertical coiling around magnetic core fore-set, and two sections of windings are forward connected into a set of winding according to the coupling of magnetic flux forward.
Referring to accompanying drawing 6, former limit or secondary magnetic core adopt array method assembling combination to form by polylith magnetic core, the former limit of non-contact transformer of the winding mixing coiling that core structure is edge expansion type or the core structure schematic diagram of secondary (upper figure) and winding connection diagram (figure below).Change monoblock magnetic core the combination of into polylith magnetic core and realize, can significantly reduce the weight of magnetic core, and have advantages of that enforcement is flexible, good economy performance.
simulation comparison
The non-contact transformer structure of the mixing coiling shown in accompanying drawing 1 of take is below example, utilizes commercial finite element emulation software Ansoft 2D, sets forth it and reduces the principle that size improves coupling coefficient.
The parameter of the non-contact transformer of the mixing coiling that emulation adopts as shown in Figure 7.Below resulting two groups of simulation comparison data be all in the situation that same air gap (the former secondary number of turn of 10mm (12:12), core structure and exciting current (5A/300kHz) draw.As shown in accompanying drawing 8, accompanying drawing 9, the former secondary winding of non-contact transformer that wherein mixes coiling is 6 circles and adopts plane coiling, 6 circles to adopt vertical coiling.
Accompanying drawing 8 is the non-contact transformer (figure below) of winding mixing coiling and the magnetic field simulation result contrasts of the non-contact transformer (upper figure) of the winding plane coiling of employing edge expansion type structure that adopt edge expansion type structure.Under the condition of same air gap, winding wire diameter, the number of turn, core structure and exciting current, the non-contact transformer Distribution of Magnetic Field of winding mixing coiling is identical with the non-contact transformer of plane coiling, but due to by winding mixing coiling, the size of transformer primary, secondary can further reduce.In accompanying drawing 8, the maximum transverse size of transformer has been reduced to from the 80mm of plane coiling the 70mm that mixes coiling.
Accompanying drawing 9 be transless masked segment winding mixing coiling transformer (upper figure) and have the magnetic field simulation result of non-contact transformer (figure below) of winding the mixings coiling of Transformer shielding part to contrast.Simulation result shows, although vertical winding add the size that can reduce transformer, increased a new leakage path.In order to suppress this part of leakage field, need to add Transformer shielding part to reduce the leakage flux on the leakage path that vertical coiling is corresponding, improve coupling coefficient.
experiment test
The non-contact transformer structure of the mixing coiling shown in accompanying drawing 1 of take is below example, verifies that by experiment it reduces the advantage that size improves coupling coefficient.
As shown in Figure 7, air gap is that 10mm, the former secondary turn ratio are 12:12 to the design parameter of the non-contact transformer of the edge expansion type mixing coiling adopting in experiment, and its Central Plains secondary winding is 6 circles and adopts plane coiling, 6 circles to adopt vertical coiling.Adopt the non-contact transformer of the utility model design, through the test of Hp HEWLETT PACKARD LCR test set, can be under the condition of 10mm air gap, keeping coupling coefficient is 0.583 and size in maximum direction is only 73mm.With regard to coupling coefficient and size, all outstanding than this type of non-contact transformer in domestic and foreign literature.Concrete implementation result contrast is as shown in the table.
| Non-contact transformer example | Length (mm)/air gap is than (mm) | Coupling coefficient |
| Vertical coiling | 330/50=6.6 | 0.48 |
| Plane coiling | 90/10=9 | 0.6 |
| Mixing coiling of the present utility model | 73/10=7.3 | 0.583 |
Wherein design parameter and the visible Nagatsuka Y of experimental data of the non-contact transformer of vertical coiling, Ehara N, Kaneko Y, Abe S, Yasuda T, " Compact contactless power transfer system for electric vehicles ", IEEE IPEC, 2010:807-813; The visible patent of the design parameter of the non-contact transformer of plane coiling and experimental data " edge expansion type high coupling coefficient non-contact transformer, CN200910032016.X ".
By above-mentioned test result, shown, under the non-contact transformer same size of the mixing coiling of the utility model design, coupling coefficient is higher than existing non-contact transformer.
Enforcement topology one of the present utility model, with reference to accompanying drawing 10, is to adopt non-contact transformer of the present utility model to be applied to the schematic diagram of full-bridge controlled resonant converter.Former limit winding (N when wherein full-bridge controlled resonant converter is to secondary transmitted power
p) electric current flow into point for Same Name of Ends, be connected in the negative terminal of resonant capacitance, two end points of secondary winding are connected in the mid point of full-bridge rectification by the resonant capacitance of secondary.
Enforcement of the present utility model topology two, with reference to accompanying drawing 11, is to adopt the noncontact non-contact transformer of winding mixing coiling to be applied to the schematic diagram of half bridge resonant transformer.Former limit winding (N when wherein half-bridge resonance topology is to secondary transmitted power
p) electric current flow into point for Same Name of Ends, be connected in the negative terminal of resonant capacitance, flow out point and be connected in master power switch pipe Q
1source electrode and Q
2the tie point of drain electrode, two end points of secondary winding are connected in the mid point of full-bridge rectification by the resonant capacitance of secondary.
Former secondary building-out capacitor in above-mentioned example all can adopt series connection/series compensation in actual applications, series connection/shunt compensation, parallel/series compensation, parallel connection/shunt compensation.This example just provides with series connection/series compensation.
Claims (8)
1. the non-contact transformer of a winding mixing coiling, comprise former limit magnetic core, former limit winding, secondary magnetic core, secondary winding, Transformer shielding part, it is characterized in that described former limit winding or/and secondary winding is forward in series according to forward coupling with the coil around the vertical coiling of magnetic core fore-set by the coil around the horizontal coiling of magnetic core side column; Transformer shielding is partly arranged in the magnetic core outside of transformer.
2. the non-contact transformer of winding mixing coiling according to claim 1, it is characterized in that described former limit winding or/and secondary winding comprises a plurality of windings, wherein at least one winding is forward in series according to forward coupling with the coil around the vertical coiling of magnetic core fore-set by the coil around the horizontal coiling of magnetic core side column.
3. the non-contact transformer of winding mixing coiling according to claim 1, is characterized in that described former limit magnetic core or/and secondary core structure adopts U-shaped, E type, I type and edge expansion type; Described edge expansion type refers to that the column bottom, both sides of magnetic core is along side to external expansion.
4. the non-contact transformer of winding mixing coiling according to claim 1, is characterized in that described former limit magnetic core or/and secondary magnetic core can be realized by polylith magnetic core and be adopted array method assembling combination to form by monoblock magnetic core.
5. the non-contact transformer of winding mixing coiling according to claim 1, the geometry that it is characterized in that described Transformer shielding part is flat shape or along the three-dimensional shape of magnetic core laminating.
6. the non-contact transformer of winding mixing coiling according to claim 1, is characterized in that described Transformer shielding part consists of one or several combination of barricade, curtain, screened film, gauze screen, shielding cloth shielding material.
7. the non-contact transformer of winding mixing coiling according to claim 1, is characterized in that described magnetic core of transformer adopts ferromagnetic material or nonferromagnetic material.
8. the non-contact transformer of winding mixing coiling according to claim 1, is characterized in that the wire of described former limit winding and secondary winding is selected solid conductor, Litz line, copper sheet, copper pipe or PCB winding.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320569518.8U CN203588822U (en) | 2013-09-13 | 2013-09-13 | Non-contact transformer with hybrid-wound windings |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320569518.8U CN203588822U (en) | 2013-09-13 | 2013-09-13 | Non-contact transformer with hybrid-wound windings |
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| CN203588822U true CN203588822U (en) | 2014-05-07 |
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| CN201320569518.8U Expired - Fee Related CN203588822U (en) | 2013-09-13 | 2013-09-13 | Non-contact transformer with hybrid-wound windings |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474213A (en) * | 2013-09-13 | 2013-12-25 | 南京航空航天大学 | Non-contact transformer with mixed wound windings |
| CN106449051A (en) * | 2016-10-20 | 2017-02-22 | 北京理工大学 | Integrated type non-contact transformer |
| CN106504870A (en) * | 2016-10-25 | 2017-03-15 | 南京航空航天大学 | The radial direction multichannel noncontact slip ring of the distributed coiling of vice-side winding |
| WO2019206612A1 (en) * | 2018-04-25 | 2019-10-31 | Siemens Aktiengesellschaft | Dc/dc converter |
| WO2019224472A1 (en) * | 2018-05-24 | 2019-11-28 | Commissariat A L'Énergie Atomique Et Aux Energies Alternatives | Electric system having at least one inductor with improved architecture |
-
2013
- 2013-09-13 CN CN201320569518.8U patent/CN203588822U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103474213A (en) * | 2013-09-13 | 2013-12-25 | 南京航空航天大学 | Non-contact transformer with mixed wound windings |
| CN106449051A (en) * | 2016-10-20 | 2017-02-22 | 北京理工大学 | Integrated type non-contact transformer |
| CN106504870A (en) * | 2016-10-25 | 2017-03-15 | 南京航空航天大学 | The radial direction multichannel noncontact slip ring of the distributed coiling of vice-side winding |
| CN106504870B (en) * | 2016-10-25 | 2018-01-30 | 南京航空航天大学 | The non-contact slip ring of radial direction multichannel of vice-side winding distribution coiling |
| WO2019206612A1 (en) * | 2018-04-25 | 2019-10-31 | Siemens Aktiengesellschaft | Dc/dc converter |
| WO2019224472A1 (en) * | 2018-05-24 | 2019-11-28 | Commissariat A L'Énergie Atomique Et Aux Energies Alternatives | Electric system having at least one inductor with improved architecture |
| FR3081625A1 (en) * | 2018-05-24 | 2019-11-29 | Commissariat A L'energie Atomique Et Aux Energies Alternatives | ELECTRICAL SYSTEM HAVING AT LEAST ONE INDUCTANCE WITH IMPROVED ARCHITECTURE |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140507 Termination date: 20180913 |