CN105679521A - Axial half-section LL-shaped non-contact power supply slip ring - Google Patents
Axial half-section LL-shaped non-contact power supply slip ring Download PDFInfo
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- CN105679521A CN105679521A CN201610046691.8A CN201610046691A CN105679521A CN 105679521 A CN105679521 A CN 105679521A CN 201610046691 A CN201610046691 A CN 201610046691A CN 105679521 A CN105679521 A CN 105679521A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/14—Inductive couplings
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F27/00—Details of transformers or inductances, in general
- H01F27/28—Coils; Windings; Conductive connections
- H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
- H01F27/306—Fastening or mounting coils or windings on core, casing or other support
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F3/00—Cores, Yokes, or armatures
- H01F3/10—Composite arrangements of magnetic circuits
- H01F3/14—Constrictions; Gaps, e.g. air-gaps
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Composite Materials (AREA)
- Coils Of Transformers For General Uses (AREA)
- Coils Or Transformers For Communication (AREA)
Abstract
The invention provides an axial half-section LL-shaped non-contact power supply slip ring. The magnetic core structure of the axial half-section LL-type non-contact power supply slip ring takes an axial half-section basic LL shape as a foundation, the axial half-section of a primary/secondary magnetic core is L-shaped, the axial half-section of a secondary/primary magnetic core is inverted L-shaped, and primary and secondary windings are coaxially shunt-wound and positioned between a primary side magnetic core and a secondary side magnetic core. The vertical distances of air gaps between windings and between magnetic cores are maintained to be unchanged, and the air gaps are moved to the secondary/primary side by cutting one triangle and/or an arc-shaped part of the primary/secondary side magnetic core, so that the effective area of a coupling magnetic circuit between the primary side magnetic core and the secondary side magnetic core is increased, the magnetic resistance is reduced, and the slip ring is also applicable for the treatment of other transformer magnetic cores; and the primary side magnetic core and the secondary side magnetic core can extend along the axial direction respectively. The primary and secondary side windings are coaxially wound, and can be coaxially wound in parallel, coaxially wound externally or coaxially wound in a cone-shaped manner; and the axial half-section LL-shaped non-contact power supply slip ring can be combined to form any number of channels or phases. The axial half-section LL-shaped non-contact power supply slip ring is applicable for non-contact electric energy transmission occasions needing rotation on a power supply side or a power receiving side.
Description
Technical field
The present invention relates to the non-contact power slip ring of a kind of high coupling coefficient, it is adaptable to rotate the non-contact electric energy transmission system of occasion, belong to transformator or field of conversion of electrical energy.
Background technology
Traditional contact electric power system is due to friction and bare exposed conductor, it is easy to produce contact sparking, and in mine, oil field etc., inflammable and explosive occasion exists very big potential safety hazard. Supply side and the electricity consumption side of contactless power supply system do not have physical connection, overcome the shortcoming of traditional contact electric power system and are widely studied and apply. Wherein, Application comparison is induction non-contact power technology widely. Induction non-contact power technology is a kind of based on electromagnetic induction principle, utilizes the transformator that former and deputy limit separates to carry out the technology of wireless power transmission.
In the occasion that some needs are powered to rolling target, machinery slip ring replaces traditional coiling to be widely used, but the contact chip of machinery slip ring causes high fault rate because rubbing for a long time, it is necessary to long term maintenance or replacement, and this is unpractical at some special occasions. E.E.Landsman, contactless slip ring is applied to solar panel in the system of power satellite by " RotaryTransformerDesign " Proc.PowerConditioning, pp.139-152,1970. but the shortcomings such as it is low that contactless power supply system still suffers from efficiency at present, and electromagnetic radiation is big. wherein, non-contact transformer lower coupling coefficient is to affect the high efficiency principal element of contactless power supply system, Chun-HungHuChing-MuChenYing-ShingShiaoTung-JungChanTsair-RongChen, " DevelopmentofaUniversalContactlessChargerforHandheldDevi ces ", 2008IEEE, IEEEInternationalSymposiumonIndustrialElectronics, the articles such as 99-104 are all pointed out, improve contactless power supply system efficiency, to set about from two aspects, on the one hand, want Appropriate application controlled resonant converter that leakage inductance or the magnetizing inductance of transformator are compensated, on the other hand, to improve the coefficient of coup of transformator as far as possible. QianhongChen, SiuChungWong, ChiK.Tse, XinboRuan, " Analysis, DesignandControlofaTranscutaneousPowerRegulatorforArtifi cialHearts ", IEEETransactionsonBiomedicalCircuitsandSystems, 2009,3 (1): 23-31 pass through loss test and analysis, point out the loss of transformator, under full load conditions, account for more than the 70% of contactless power supply system loss.Visible, the coefficient of coup improving non-contact transformer is the key improving contactless power supply system. Simultaneously as the existence of non-contact power slip ring magnetic core air gap, serious edge flux and stray flux also can produce eddy-current loss on axle in a metal, make maincenter generate heat, meanwhile, and reduction system effectiveness. Traditional scheme adopts aluminium shielding layer to shield, it is prevented that axis generates heat, but rate screen layer installs trouble, and self also can generate heat.
The non-contact power slip ring structure of conventional axial half section UU type magnetic core is such as shown in accompanying drawing 8a, its magnetic core is made up of two U-shaped core plan opposites, and between its air gap place former secondary magnetic core, the effective area of Coupled Magnetic Path is less, causes that main magnetic circuit magnetic resistance is bigger, the coefficient of coup is less, inefficient. How when reducing volume and weight as far as possible, the coefficient of coup improving non-contact power slip ring becomes the difficult point of non-contact power slip ring design.
Summary of the invention
The invention aims to improve the defects such as the coefficient of coup that above-mentioned non-contact power slip ring exists is low, axis eddy-current loss high, system effectiveness is low. Relatively conventional noncontact slip ring, under the premise that magnetic material, copper material consumption are basically unchanged, devises the novel non-contact power slip ring of a kind of high coupling coefficient.
The concrete technical scheme of the present invention is as follows:
A kind of axially half section LL type non-contact power slip ring, including former limit unit and secondary unit, former limit unit includes former limit magnetic core and the primary side winding being wound on the magnetic core of former limit, secondary unit includes secondary magnetic core and the vice-side winding being wound on secondary magnetic core, air gap is stayed between former limit unit and secondary unit, primary and secondary side magnetic core radial section is ringwise or polygon, described former/the axial half section of secondary magnetic core is L-shaped, then the axial half section of pair/former magnetic core is inverted L shape, and former and deputy limit winding coaxially divides around between the magnetic core of former and deputy limit.
The design further of the present invention is in that:
The L-type magnetic core of the axial half section of former and deputy limit unit becomes the rectangular configuration of contactless upper and lower opening with inverted L shape core combination, and forms air gap in upper and lower opening position.
Former and deputy limit magnetic core adopts in upper shed and under shed position to be faced directly, carries out combination in any between two in inclined-plane or three kinds of fit systems of cambered surface, comprise: face-face directly combination directly, surface-inclined surface combines, face-cambered surface combination, inclined-plane-face combination, inclined-plane-incline configuration directly directly, inclined-plane-cambered surface combination, cambered surface-face combination, cambered surface-incline configuration, cambered surface-cambered surface combination directly.
Such as:
1) magnetic core upper and lower opening position, former and deputy limit all adopts and faces cooperation directly, and the air gap of formation is each parallel to central axis direction, for facing-face directly combination directly;
2) or upper shed adopt and face cooperation directly, the air gap of formation is each parallel to central axis direction, and under shed adopts inclined-plane to coordinate, and the air gap of formation is corresponding angle to axis, for surface-inclined surface combination;
3) or under shed adopt and face cooperation directly, the air gap of formation is each parallel to central axis direction, and upper shed adopts inclined-plane to coordinate, and the air gap of formation is corresponding angle to axis, for inclined-plane-face combination directly;
4) or upper and lower opening all adopt inclined-plane to coordinate, the air gap of formation is all corresponding angle to axis, inclined-plane-incline configuration. Etc.)
In the present invention, the former limit of LL type, axial half section and/or secondary magnetic core can axially extend. (to stop that the magnetic line of force enters axis, reduce the eddy-current loss of axis. The magnetic flux entering axis is relatively weak, and the core thickness of extension is less demanding, can according to practical situation adjustment).
Inner side magnetic core and winding as former limit unit, outside magnetic core and winding as secondary unit; Or outside magnetic core and winding as former limit unit, inner side magnetic core and winding as secondary unit; Former limit unit is as the supply side of noncontact slip ring, and secondary unit is as the power side of noncontact slip ring; Wherein supply side rotates, or power side rotates.
In the present invention, former limit magnetic core and/or secondary magnetic core adopt monolithic construction or split assembled structure.
It is combined into multichannel or heterogeneous slip ring by multiple axial half sections LL type non-contact power slip ring.
Former limit magnetic core and secondary core material adopt stalloy, ferrite, crystallite, ultracrystallite or permalloy material.
Primary side winding and vice-side winding adopt coaxial inside and outside coiling, coaxial parallel winded or coaxial taper coiling, form winding air gap between primary side winding and vice-side winding.
The wire of primary side winding and vice-side winding selects solid conductor, Litz line, Copper Foil or PCB winding, and the number of turn of former and deputy limit winding is identical or different.
Present invention technical characteristics compared with existing non-contact power slip ring:
First, by the core structure of the present invention, increase the effective area of Coupled Magnetic Path between former secondary magnetic core, substantially reduce the air-gap reluctance in main magnetic circuit, decrease fringing flux and stray flux, improve main magnetic flux; The magnetic resistance of leakage magnetic flux magnetic circuit slightly becomes big, and magnetic leakage flux slightly reduces; The raising of main magnetic flux and the reduction of magnetic leakage flux, improve the ratio that total magnetic flux closes through main magnetic circuit, improves the coefficient of coup of non-contact power slip ring.
Second, two air gap breach are not easily accessible axis non-perpendicular to axis, edge flux and stray flux, and one of them air gap is from axis farther out, substantially reduces the eddy-current loss of axis, improves axis heat condition.
Accompanying drawing explanation
Accompanying drawing 1 (a-b) is the axial half section basic LL type non-contact power slip ring of the present invention, and its former secondary magnetic core is made up of entire magnets respectively, and its radial section is annular. Accompanying drawing 1a is structural representation after the split of former and deputy limit; Accompanying drawing 1b is the assembling figure of former and deputy limit magnetic core and winding, 101 former limit magnetic cores, 102 primary side winding, 103 secondary magnetic cores, 104 vice-side winding.
Accompanying drawing 2 is the axial half section basic LL type non-contact power slip ring of the present invention, and its former secondary magnetic core is made up of entire magnets respectively, and its radial section is annular. Accompanying drawing 2a is structural representation after the split of former and deputy limit; Accompanying drawing 2b is the assembling figure of former and deputy limit magnetic core and winding, 201 former limit magnetic cores, 202 primary side winding, 203 secondary magnetic cores, 204 vice-side winding.
Accompanying drawing 3 (a-b) is the axial half section basic LL type non-contact power slip ring of the present invention, and its former secondary magnetic core is made up of entire magnets respectively, and its radial section is hexagon. Accompanying drawing 3a is structural representation after the split of former and deputy limit; Accompanying drawing 3b is the assembling figure of former and deputy limit magnetic core and winding, 301 former limit magnetic cores, 302 primary side winding, 303 secondary magnetic cores, 304 vice-side winding.
Accompanying drawing 4 (a-b) is the axial half section basic LL type non-contact power slip ring in the present invention, and its former limit magnetic core is made up of entire magnets, and radial section is annular; Secondary magnetic core is made up of discrete magnet, and radial section is hexagon. Accompanying drawing 4a is structural representation after the split of former and deputy limit; Accompanying drawing 4b is the assembling figure of former and deputy limit magnetic core and winding, 401 former limit magnetic cores, 402 primary side winding, 403 secondary magnetic cores, 404 vice-side winding.
Accompanying drawing 5 is the axial plane schematic diagram of the axial half section basic LL type non-contact power slip ring in the present invention. 501 former limit magnetic cores, 502 primary side winding, 503 under shed air gaps, 504 secondary magnetic cores, 505 vice-side winding, 506 upper shed air gaps, 507 winding air gaps, 508 acrylic cylinders, 509 axis.
Accompanying drawing 6 is the axial plane schematic diagram of the axial half section LL-delta type non-contact power slip ring in the present invention.
Accompanying drawing 7 is the axial plane schematic diagram of the axial half section LL-arc type non-contact power slip ring in the present invention.
Accompanying drawing 8 (a-e) be former and deputy limit magnetic core in the present invention adopt in upper shed and under shed position face directly, inclined-plane or three kinds of fit systems of cambered surface carry out the schematic diagram of combination in any between two. Accompanying drawing 8a is that cooperation is faced in upper shed employing directly; Under shed adopts inclined-plane to coordinate. Accompanying drawing 8b is that upper shed adopts inclined-plane to coordinate; Under shed adopts and faces cooperation directly. Accompanying drawing 8c is that cooperation is faced in upper shed employing directly; Under shed adopts cambered surface to coordinate. Accompanying drawing 8d is that upper shed adopts cambered surface to coordinate; Under shed adopts and faces cooperation directly. Accompanying drawing 8e is that upper shed adopts inclined-plane to coordinate; Under shed adopts cambered surface to coordinate. Accompanying drawing 8d is that upper shed adopts cambered surface to coordinate; Under shed adopts inclined-plane to coordinate. Accompanying drawing 8f is that under shed adopts inclined-plane to coordinate, and upper shed adopts cambered surface to coordinate.
Accompanying drawing 9 (a-f) is the floor map that the non-contact power slip ring in the present invention axially extends magnetic core. Accompanying drawing 9a is upper and lower opening is all that the magnetic core facing cooperation directly extends up and down along axle simultaneously. Accompanying drawing 9b is upper and lower opening is all the magnetic core lower extension vertically facing cooperation directly. Accompanying drawing 9c is upper and lower opening is all that the magnetic core facing cooperation directly extends vertically. Accompanying drawing 9d is upper and lower opening is all that the magnetic core that inclined-plane coordinates downwardly extends vertically; Accompanying drawing 9e is upper and lower opening is all that the magnetic core that inclined-plane coordinates extends under vertically; Accompanying drawing 9f is upper and lower opening is all that the magnetic core that inclined-plane coordinates extends vertically.
Accompanying drawing 10 (a-b) is the basic LL type non-contact power slip ring in the present invention, except the other two kinds of winding methods except former vice-side winding coaxially upper and lower parallel winded. Accompanying drawing 10a is coaxial inside and outside coiling, and accompanying drawing 10b is coaxial taper coiling.
Accompanying drawing 11 is the three-phase noncontact slip ring being made up of the basic LL type non-contact power slip ring in the present invention.
Accompanying drawing 12 (a-d) is the physical dimension figure of conventional axial half section UU type and the axial half section LL type non-contact power slip ring in the present invention. Accompanying drawing 12a is the dimensional drawing of tradition UU type structure. Accompanying drawing 12b is the dimensional drawing of the basic LL type structure in the present invention. Accompanying drawing 12c is the dimensional drawing of LL-arc type structure in the present invention. Accompanying drawing 12d is the dimensional drawing of LL-delta type structure in the present invention.
Accompanying drawing 13 (a-d) is the magnetic Miyun figure of conventional axial half section UU type and the Ansoft2D emulation of the axial half section LL type non-contact power slip ring in the present invention. Accompanying drawing 13a is the emulation magnetic Miyun figure of tradition UU type structure. Accompanying drawing 13b is the emulation magnetic Miyun figure of the basic LL type structure in the present invention. Accompanying drawing 13c is the emulation magnetic Miyun figure of the LL-arc type structure in the present invention. Accompanying drawing 13d is the emulation magnetic Miyun figure of the LL-delta type structure in the present invention.
Detailed description of the invention
The several of the non-limiting present invention of disclosing of accompanying drawing are embodied as example, and in conjunction with accompanying drawing, that the invention will be further described is as follows.
Embodiment one: 501 former limit magnetic core; 502 primary side winding; 503 under shed air gaps; 504 secondary magnetic cores;505 vice-side winding; 506 upper shed air gaps; 507 winding air gaps; 508 acrylic cylinders; 509 axis.
Referring to accompanying drawing 5, the axial half section basic LL type non-contact power slip ring of the present invention, including former limit unit and secondary unit, former limit unit includes former limit magnetic core 501 and the primary side winding 502 being wound on the magnetic core of former limit, secondary unit includes secondary magnetic core 504 and the vice-side winding 505 being wound on secondary magnetic core, staying air gap between former limit unit and secondary unit, primary and secondary side magnetic core radial section is ringwise or polygon.
The axial half section of former limit magnetic core 501 is L, and the axial half section of secondary magnetic core 504 is inverted L. Secondary unit is arranged on axis 509 through acrylic cylinder 508, it is possible to rotate with axle. The magnetic core of this structure, the UU magnetic core that between its former secondary magnetic core, the effective area of Coupled Magnetic Path is relatively conventional improves a lot, and air-gap reluctance reduces so that the magnetizing inductance of slip ring strengthens, and leakage inductance is basically unchanged, so that the coefficient of coup improves.
Embodiment two: referring to accompanying drawing 1, the magnetic core of its former secondary is an entire magnets respectively, and all the other structures are with embodiment one. Accompanying drawing 1a is structural representation after the split of former and deputy limit; Accompanying drawing 1b is the assembling figure of former and deputy limit magnetic core and winding.
Embodiment three: referring to accompanying drawing 2, the magnetic core of its former secondary is spliced by discrete magnet respectively, its radial section is annular, saves magnetic material, and its weight declines to a great extent, and the coefficient of coup is basically unchanged, and all the other structures are with embodiment one. Accompanying drawing 2a is structural representation after the split of former and deputy limit; Accompanying drawing 2b is the assembling figure of former and deputy limit magnetic core and winding.
Embodiment four: referring to accompanying drawing 3, the magnetic core of its former secondary is spliced by discrete magnet respectively, and its radial section is hexagon, saves magnetic material, and its weight declines to a great extent, and the coefficient of coup is basically unchanged, and all the other structures are with embodiment one. Accompanying drawing 3a is structural representation after the split of former and deputy limit; Accompanying drawing 3b is the assembling figure of former and deputy limit magnetic core and winding.
Embodiment five: referring to accompanying drawing 4, the magnetic core of its former secondary is made up of entire magnets and discrete magnet respectively, its radial section is annular and hexagon, saves magnetic material, and its weight declines to a great extent, and the coefficient of coup is basically unchanged, and all the other structures are with embodiment one. Accompanying drawing 4a is structural representation after the split of former and deputy limit; Accompanying drawing 4b is the assembling figure of former and deputy limit magnetic core and winding.
Embodiment six:
Referring to accompanying drawing 6, the LL-delta type non-contact power slip ring in the present invention, it is on the basis of accompanying drawing 5 structure, former limit magnetic core is intercepted a cross section is gable, is displaced to secondary magnetic core, simultaneously, secondary magnetic core is intercepted a cross section is gable, is displaced to former limit magnetic core; Triangle wedge angle takes Passivation Treatment, in case magnetic saturation occurs in triangle sharp corner. The magnetic core of this structure, on the basis of accompanying drawing 5 structure, further increases the effective area of Coupled Magnetic Path between former secondary magnetic core, so that the coefficient of coup improves further.
Wherein accompanying drawing 6a is that upper shed adopts inclined-plane to coordinate; Under shed is also adopted by inclined-plane and coordinates.
Wherein accompanying drawing 6b is the partial enlarged drawing of accompanying drawing 6a, and the angle of its inclined-plane cutting is:
Wherein, Wc=5mm, Ww=8mm, Wc≤W≤Wc+Ww, for keeping the vertical dimension between inclined-plane to be always W⊥=5mm, then the horizontal range of magnetic core air gap is W||=W⊥/cosθ。
(1) W=W is worked ascTime, θ ≈ 45 °, W||=7.1mm, coefficient of coup k=0.90581;
(2) W is worked asc<W<Wc+Ww, takeTime, θ ≈ 26.6 °, W||=5.6mm, coefficient of coup k=0.92474;
(3) W=W is worked asc+WwTime, θ ≈ 18.4 °, W||=5.3mm, coefficient of coup k=0.93179.
Visible, work as W=Wc+WwTime, the coefficient of coup is the highest, and namely θ ≈ 18.4 ° is best inclined-plane cutting angle.
Embodiment seven:
Referring to accompanying drawing 7, the LL-arc type non-contact power slip ring in the present invention, it is on the basis of accompanying drawing 5 structure, former limit magnetic core is intercepted a cross section is arch section, is displaced to secondary magnetic core, simultaneously, secondary magnetic core is intercepted a cross section is arch section, is displaced to former limit magnetic core. The magnetic core of this structure, on the basis of accompanying drawing 5 structure, further increases the effective area of Coupled Magnetic Path between former secondary magnetic core, so that the coefficient of coup improves further.
Embodiment eight:
Referring to accompanying drawing 8, former and deputy limit magnetic core adopt in upper shed and under shed position face directly, two kinds different in inclined-plane or three kinds of fit systems of cambered surface, carry out combination in any between two, comprise: surface-inclined surface combines, inclined-plane-face combination directly, faces-cambered surface combination, cambered surface-face combination directly directly, inclined-plane-cambered surface combination, cambered surface-incline configuration.
Wherein accompanying drawing 8a is that cooperation is faced in upper shed employing directly; Under shed adopts inclined-plane to coordinate.
Wherein accompanying drawing 8b is that upper shed adopts inclined-plane to coordinate; Under shed adopts and faces cooperation directly.
Wherein accompanying drawing 8c is that cooperation is faced in upper shed employing directly; Under shed adopts cambered surface to coordinate.
Wherein accompanying drawing 8d is that upper shed adopts cambered surface to coordinate; Under shed adopts and faces cooperation directly.
Wherein accompanying drawing 8e is that upper shed adopts inclined-plane to coordinate; Under shed adopts cambered surface to coordinate.
Wherein accompanying drawing 8f is that upper shed adopts cambered surface to coordinate; Under shed adopts inclined-plane to coordinate.
Embodiment nine:
Referring to accompanying drawing 9, it in accompanying drawing 5 and accompanying drawing 6a structure substantially, axially extends magnetic core.
Wherein accompanying drawing 9a is upper and lower opening is all that the magnetic core facing cooperation directly extends up and down along axle simultaneously.
Wherein accompanying drawing 9b is upper and lower opening is all the magnetic core lower extension vertically facing cooperation directly.
Wherein accompanying drawing 9c is upper and lower opening is all that the magnetic core facing cooperation directly extends vertically.
Wherein accompanying drawing 9d is upper and lower opening is all that the magnetic core that inclined-plane coordinates downwardly extends vertically.
Wherein accompanying drawing 9e is upper and lower opening is all that the magnetic core that inclined-plane coordinates extends under vertically.
Wherein accompanying drawing 9f is upper and lower opening is all that the magnetic core that inclined-plane coordinates extends vertically.
Embodiment ten:
Referring to accompanying drawing 10, being in the non-contact power slip ring of the present invention, except the other two kinds of winding methods except the former vice-side winding of accompanying drawing 5 coaxially upper and lower parallel winded, accompanying drawing 10a is coaxial inside and outside coiling, and accompanying drawing 10b is coaxial taper coiling.
Embodiment 11:
Referring to accompanying drawing 11, it is employing 6 such as the three-phase noncontact slip ring of the noncontact slip-ring combination of accompanying drawing 5. The noncontact slip ring of this structure, what formed in its magnetic core is travelling-magnetic-field.
Embodiment 12:
Referring to accompanying drawing 12, it is the non-contact power slip ring physical dimension figure with the axial half section LL type non-contact power slip ring in the present invention of conventional axial half section UU type magnetic core. Umber of turn is 1 circle, and winding spacing is 5mm, and axis (containing acrylic cylinder) diameter is 90mm, and core thickness is all 5mm, and diameter is 3mm.
Wherein accompanying drawing 12a is the dimensional drawing of tradition UU type structure, and the vertical dimension of its upper and lower opening air gap is 5mm.
Wherein accompanying drawing 12b is the dimensional drawing of the basic LL type in the present invention, and the vertical dimension of its upper and lower opening air gap is 5mm.
Wherein accompanying drawing 12c is the dimensional drawing of LL-arc type in the present invention, and the minimum range of its upper and lower opening air gap is 5mm.
Wherein accompanying drawing 12d is the dimensional drawing of the dimensional drawing of LL-delta type in the present invention, and the vertical dimension of its upper and lower opening air gap is 5mm.
Referring to accompanying drawing 13, it is the magnetic Miyun figure of the Ansoft2D emulation of tradition slip ring structure and slip ring structure of the present invention. Simulated environment is: magnetostatic field emulates, and core material is ferrite, and former limit exciting current is 10A, and secondary is opened a way. When magnetic core and copper material consumption, volume are basically unchanged, the axial half section LL type non-contact power slip ring in the present invention significantly improves the coefficient of coup of non-contact power slip ring.
Wherein accompanying drawing 13a is the emulation magnetic Miyun figure of tradition UU type structure, and the magnetic in metal axis near magnetic core air gap opening part is close very big. Two, the left and right of this structure air gap opening is perpendicular to metal axis, and the edge flux and the stray flux that enter axis are relatively big, and the eddy-current loss produced on axis is bigger.
Wherein accompanying drawing 13b is the emulation magnetic Miyun figure of the basic LL type structure in the present invention. The upper and lower opening of this structure is all for facing fit system directly, its upper and lower two air gap opening parallel are in metal axis, and upper shed distance axis is farther out, the edge flux of entrance axis is compared accompanying drawing 13a and is greatly reduced with stray flux, and the eddy-current loss correspondence produced on axis is less.
Wherein accompanying drawing 13c is the emulation magnetic Miyun figure of the LL-arc type structure in the present invention. The upper and lower opening of this structure is all cambered surface fit system, its upper and lower two air gap openings are angled with metal axis, and upper shed distance axis is farther out, the edge flux of entrance axis is compared accompanying drawing 13a and is greatly reduced with stray flux, and the eddy-current loss correspondence produced on axis is less.
Wherein accompanying drawing 13d is the emulation magnetic Miyun figure of the LL-delta type structure in the present invention. The upper and lower opening of this structure is all inclined-plane fit system, its upper and lower two air gap openings are angled with metal axis, the edge flux of entrance axis compares accompanying drawing 13b and accompanying drawing 13c with stray flux to be increased to some extent, but much smaller than accompanying drawing 13a, the eddy-current loss correspondence produced on axis is less.
Referring to table 1, it it is the result of the Ansoft2D emulation of tradition slip ring structure and slip ring structure of the present invention. The coefficient of coup from big to small, is followed successively by the basic LL type in tradition UU type, the present invention, the LL-arc type in the present invention, the LL-delta type in the present invention.
Visible, the axial half section LL type non-contact power slip ring of the present invention compares tradition UU type for electric slip ring, and the edge flux and the stray flux that enter axis all reduce to some extent, and the reduction of corresponding metal axis eddy-current loss, the coefficient of coup all increases simultaneously.
Table 1:Ansoft2D simulation result
| Non-contact power slip ring | The coefficient of coup | Coefficient of coup increase rate |
| Tradition UU type | 0.89832 | 0 |
| Basic LL type in the present invention | 0.91351 | 1.69% |
| LL-arc type in the present invention | 0.92396 | 2.85% 6--> |
| LL-delta type in the present invention | 0.93179 | 3.73% |
The above, be only the preferred embodiments of the present invention, be not intended to limit protection scope of the present invention. All within the spirit and principles in the present invention, any amendment of making, equivalent replacement, improvement etc., should be included within protection scope of the present invention.
Claims (10)
1. an axial half section LL type non-contact power slip ring, including former limit unit and secondary unit, former limit unit includes former limit magnetic core and the primary side winding being wound on the magnetic core of former limit, secondary unit includes secondary magnetic core and the vice-side winding being wound on secondary magnetic core, air gap is stayed between former limit unit and secondary unit, primary and secondary side magnetic core radial section is ringwise or polygon, it is characterized in that: described former/the axial half section of secondary magnetic core is L-shaped, then the axial half section of pair/former magnetic core is inverted L shape, and former and deputy limit winding coaxially divides around between the magnetic core of former and deputy limit.
2. axially half section LL type non-contact power slip ring as claimed in claim 1, it is characterized in that: the L-type magnetic core of the axial half section of former and deputy limit unit becomes the rectangular configuration of contactless upper and lower opening with inverted L shape core combination, and forms air gap in upper and lower opening position.
3. axially half section LL type non-contact power slip ring as claimed in claim 2, it is characterized in that: former and deputy limit magnetic core adopts in upper shed and under shed position to be faced directly, carry out combination in any between two in inclined-plane or three kinds of fit systems of cambered surface, comprising: face-face directly combination directly, surface-inclined surface combines, and faces-cambered surface combination directly, inclined-plane-face combination directly, inclined-plane-incline configuration, inclined-plane-cambered surface combination, cambered surface-face combination directly, cambered surface-incline configuration, cambered surface-cambered surface combination.
4. the axial half section LL type non-contact power slip ring as described in claim 1,2 or 3, it is characterised in that: axially the former limit of LL type, half section and/or secondary magnetic core can axially extend.
5. the axial half section LL type non-contact power slip ring as described in claim 1,2,3 or 4, is characterized in that: inner side magnetic core and winding as former limit unit, outside magnetic core and winding as secondary unit; Or outside magnetic core and winding as former limit unit, inner side magnetic core and winding as secondary unit; Former limit unit is as the supply side of noncontact slip ring, and secondary unit is as the power side of noncontact slip ring; Wherein supply side rotates, or power side rotates.
6. the axial half section LL type non-contact power slip ring as described in claim 1,2,3,4 or 5, is characterized in that: former limit magnetic core and/or secondary magnetic core adopt monolithic construction or split assembled structure.
7. axially half section LL type non-contact power slip ring as claimed in claim 6, it is characterised in that: it is combined into multichannel or heterogeneous slip ring by multiple axial half sections LL type non-contact power slip ring.
8. axially half section LL type non-contact power slip ring as claimed in claim 6, is characterized in that: former limit magnetic core and secondary core material adopt stalloy, ferrite, crystallite, ultracrystallite or permalloy material.
9. axially half section LL type non-contact power slip ring as claimed in claim 6, is characterized in that: primary side winding and vice-side winding adopt coaxial inside and outside coiling, coaxial parallel winded or coaxial taper coiling, form winding air gap between primary side winding and vice-side winding.
10. axially half section LL type non-contact power slip ring as claimed in claim 6, is characterized in that: the wire of primary side winding and vice-side winding selects solid conductor, Litz line, Copper Foil or PCB winding, and the number of turn of former and deputy limit winding is identical or different.
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| CN201610046691.8A CN105679521B (en) | 2016-01-22 | 2016-01-22 | Axial half section LL types non-contact power slip ring |
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| CN201610046691.8A CN105679521B (en) | 2016-01-22 | 2016-01-22 | Axial half section LL types non-contact power slip ring |
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| CN105679521B CN105679521B (en) | 2018-01-02 |
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| CN106783064A (en) * | 2016-11-28 | 2017-05-31 | 上海交通大学 | A kind of contactless electric slip ring |
| CN109586418A (en) * | 2018-12-12 | 2019-04-05 | 哈尔滨工业大学 | A kind of L-type power supply rail applied to the power supply of mobile device dynamic radio |
| CN111775738A (en) * | 2020-07-28 | 2020-10-16 | 重庆华创智能科技研究院有限公司 | Coupling mechanism for improving anti-deviation capability of unmanned aerial vehicle wireless charging system |
| CN111933415A (en) * | 2020-08-05 | 2020-11-13 | 江西广变电气有限公司 | Concentric winding mechanism of oil immersed transformer and application thereof |
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| CN105679521B (en) | 2018-01-02 |
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