CN107026550B - A kind of Hybrid Excitation Switched Reluctance Motor - Google Patents

A kind of Hybrid Excitation Switched Reluctance Motor Download PDF

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Publication number
CN107026550B
CN107026550B CN201710355192.1A CN201710355192A CN107026550B CN 107026550 B CN107026550 B CN 107026550B CN 201710355192 A CN201710355192 A CN 201710355192A CN 107026550 B CN107026550 B CN 107026550B
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pole
stator
torque
permanent magnet
public
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CN107026550A (en
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王惠军
庞明琪
曲政
魏新生
张明举
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Beihang University
Shanghai Aerospace Control Technology Institute
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Beihang University
Shanghai Aerospace Control Technology Institute
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K21/00Synchronous motors having permanent magnets; Synchronous generators having permanent magnets
    • H02K21/26Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating armatures and stationary magnets
    • H02K21/28Synchronous motors having permanent magnets; Synchronous generators having permanent magnets with rotating armatures and stationary magnets with armatures rotating within the magnets
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12Stationary parts of the magnetic circuit
    • H02K1/14Stator cores with salient poles
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K1/00Details of the magnetic circuit
    • H02K1/06Details of the magnetic circuit characterised by the shape, form or construction
    • H02K1/12Stationary parts of the magnetic circuit
    • H02K1/17Stator cores with permanent magnets
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02KDYNAMO-ELECTRIC MACHINES
    • H02K2213/00Specific aspects, not otherwise provided for and not covered by codes H02K2201/00 - H02K2211/00
    • H02K2213/03Machines characterised by numerical values, ranges, mathematical expressions or similar information
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02TCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
    • Y02T10/00Road transport of goods or passengers
    • Y02T10/60Other road transportation technologies with climate change mitigation effect
    • Y02T10/64Electric machine technologies in electromobility

Abstract

A kind of Hybrid Excitation Switched Reluctance Motor, by stator core, permanent magnet, torque winding coil, public pole winding coil, rotor core, axis composition.Stator core has eight stator tooths.Stator tooth on X+, X-, Y+, Y- four direction is torque pole, is wound with torque winding coil above;At 45 ° with the direction X+, 135 °, 225 °, the stator tooth of 315 ° of angles is public pole, wherein it is at 45 ° with X+, public pole winding coil is wound on the public pole of 225 ° of angles;With X+ at 135 °, the public pole of 315 ° of angles is inlaid with permanent magnet at the yoke portion between torque pole adjacent thereto respectively.It is rotor core inside stator core, is axis inside rotor core.There are air gaps between stator core and rotor core, form air-gap.The present invention provides a kind of Hybrid Excitation Switched Reluctance Motor using permanent magnet and public pole winding coil, increases the degree of saturation of motor magnetic circuit in the case where keeping input current constant, to increase the output torque of motor.

Description

A kind of Hybrid Excitation Switched Reluctance Motor
Technical field
The present invention relates to a kind of Hybrid Excitation Switched Reluctance Motors, can be used as motor in electric automobile.
Background technique
Switched reluctance machines are to rapidly develop and occur a kind of new with power electronics and microelectronics in recent ten years Type controllable AC Variable-speed system.It is a kind of motor of double-salient-pole structure, does not have any permanent magnet and winding on rotor, is straight It connects and is formed by silicon steel plate stacking, concentratred winding is wound on motor stator.When stator concentratred winding is passed through electric current, stator and rotor are convex Magnetic pull between pole can generate reluctance torque, rotate rotor.Therefore switched reluctance machines have structure it is simple, it is at low cost, Reliability and error resilience performance are strong, starting current is small, detent torque is big, can frequent start-stop and speed adjustable range it is wide the advantages that, these are excellent Point is so that switched reluctance machines are favored in industrial application.
The winding current of switched reluctance machines not only has torque component, and there are also excitation components.To increase converter and The voltammetric capacity of winding introduces additional added losses;Switched reluctance machines can only contribute in positive half cycle, and in negative half period inductance Braking moment can be generated when reduction, cause stock utilization low.In order to solve these problems, the spy of double-salient-pole structure is made full use of Permanent-magnet material is embedded in rotor body by point, people, forms Hybrid Excitation Switched Reluctance Motor.Outside this electric machine rotor structure Shape is similar to Conventional switched reluctance motor, but has any different on operation logic and its control strategy with conventional motors.
Traditional Hybrid Excitation Switched Reluctance Motor is that permanent magnet is attached to stator tooth surface.The advantages of this motor is Volume is smaller.But since permanent magnet is attached to stator tooth surface, and permanent magnet magnetic resistance is larger, so that the gas length mistake of motor Greatly, to influence the performance of motor.
Summary of the invention
Technology of the invention solves the problems, such as: providing and a kind of utilizes the novel mixed of permanent magnet and public pole additive excitation coil Field switch reluctance motor is closed, permanent magnet is embedded on electric machine stator iron yoke, since the excitation mode of motor is by traditional electricity Excitation become with the coefficient composite excitation of permanent magnet, this can keep input exciting current it is constant in the case where increase electricity The degree of saturation of machine magnetic circuit, to increase the electromagnetic torque of motor.
The technical solution of the invention is as follows: a kind of Hybrid Excitation Switched Reluctance Motor, by a stator core, four forever Magnet, a rotor core, an axis, four torque winding coils, two public pole winding coil compositions.Stator core has eight A stator tooth.Stator tooth on X+, X-, Y+, Y- four direction is wound with torque winding coil as torque pole above;With X + direction is at 45 °, and 135 °, 225 °, the stator tooth of 315 ° of angles is public pole, wherein, the public pole of 225 ° angle at 45 ° with X+ It is wound with public pole winding coil above;With X+ at 135 °, the public pole of 315 ° of angles is distinguished between torque pole adjacent thereto Yoke is inlaid with permanent magnet at portion.Permanent magnet is rectangular parallelepiped structure, and the axial section of permanent magnet is square.If permanent magnet N is arrived pole The distance on motor vertex adjacent thereto is L1, the side length of permanent magnet axial section is Lp, the side length of motor axial section is L.It is fixed Sub- rear of core is α with a thickness of h, internal diameter r, the polar arc degree of public pole stator toothc, torque pole stator tooth polar arc degree is αt, Rotor pole arc degree is αr, rotor polar distanceNrFor rotor core (5) number of poles, then it should meet 1/5≤L of inequality1/L ≤ 1/2,αc≥βr.Public pole winding coil the number of turns NcWith torque winding coil circle Number NtThe ratio between meet 0.5≤Nc/Nt≤2.The groove width of adjacent torque pole and public pole stator root portion is w, public pole stator tooth Root width is L2, should meetIt is rotor iron inside stator core The heart, there are air gaps between stator core and rotor core, form air-gap.It is axis inside rotor core.
The principle of above scheme is: the present invention provides excitation magnetic flux using permanent magnet and public pole coil, in motor stator Rear of core is embedded in permanent magnet, since the excitation mode of motor is become and permanent magnet is coefficient mixes by traditional electrical excitation Excitation, this can increase the degree of saturation of motor magnetic circuit in the case where keeping input exciting current constant, to increase motor Electromagnetic torque.Stator torque pole is respectively labeled as A1, A2, B1, B2, public pole is labeled as C1, C2, C3, C4.Of the invention The magnetic flux path that stator torque iron core generates is, with the A1 in Y-direction, for A2, torque pole A1 generates magnetic flux, and magnetic flux is by fixed Sub- yoke, public pole C1, air gap, rotor core 5, air gap return to the pole A1, to form closed circuit;Torque pole A2 generates magnetic flux, Magnetic flux returns to the pole A2 by stator yoke, public pole C2, air gap, rotor core 5, air gap, forms closed circuit, as shown in Figure 4. The magnetic flux path that public pole generates has two, and the winding coil on public pole C1 generates magnetic flux, and first magnetic flux passes through air gap, turn Sub- iron core 5, air gap, the pole A1, stator yoke return to the pole C1, form closed circuit;Article 2 magnetic flux pass through air gap, rotor core 5, Air gap, the pole B1, stator yoke return to the pole C1, form closed circuit;Winding coil on public pole C2 generates magnetic flux, first magnetic Air gap is crossed in promoting menstruation, and rotor core 5, air gap, the pole A2 returns to public pole C2, forms closed circuit;Article 2 magnetic flux passes through air gap, Rotor core 5, air gap, the pole B2 return to public pole C2, form closed circuit;As shown in Figure 5.That is the flux path of public pole generation Diameter is identical as the magnetic flux path that the torque pole of conducting generates always.Permanent magnet is denoted as P1, P2, P3, P4, then permanent magnet generates Magnetic flux path is, by taking permanent magnet P1 as an example, magnetic flux passes through public pole C4, air gap, rotor core from the pole N of permanent magnet P1 5, air gap, public pole C1 returns to the pole S of permanent magnet P1, forms closed circuit, as shown in Figure 6.But permanent magnet can be in public pole Under effect, change its magnetic flux path, as public pole C1, when C2 is connected, with permanent magnet P1, for P3, magnetic that permanent magnet P1 is generated It is logical from the pole N, by public pole C4, air gap, rotor core, air gap, torque pole A1 returns to the pole S of P1, and formation is closed back Road;The magnetic flux that permanent magnet P3 is generated is from the pole N, and by public pole C3, air gap, rotor core, torque pole A2 returns to the S of P2 Pole forms closed circuit, as shown in Figure 7.It can thus be appreciated that the principle that torque generates are as follows: when torque winding coil is powered, generate magnetic , due to the presence of magnetic pull, generate torque.The excitation magnetic flux that permanent magnet is generated with public pole exists always, with rotor position The variation set, excitation magnetic flux can switch its path.Permanent magnet P1, P4 can change its original magnetic under the action of public pole C1 Path;Permanent magnet P2, P3 can change its original magnetic flux path under the action of public pole C2.With permanent magnet P1, for P3, The magnetic flux that permanent magnet P1 is generated is from the pole N, and via public pole C4, rotor core, A1 phase stator tooth, stator yoke return to the S of P1 Pole forms closed circuit;The magnetic flux that permanent magnet P3 is generated is from the pole N, by public pole C3, air gap, rotor core, torque pole A2 returns to the pole S of P2, forms closed circuit, as shown in Figure 7.When i.e. when torque pole, A1, A2 phase work, permanent magnet P1 can enhance The air-gap flux of torque pole A1, permanent magnet P3 will increase the air-gap flux of torque pole A2;As torque pole B1, when B2 works, permanent magnetism Body P4 will increase the air-gap flux of torque pole B1, and permanent magnet P2 will increase the air-gap flux of torque pole B2.It can thus be seen that drawing Enter permanent magnet and public pole coil, the output torque of motor can be increased.
The advantages of the present invention over the prior art are that: the present invention is by utilizing permanent magnet and the generation of public pole coil Magnetic flux is motivated, the output torque of motor can be made to rise to 1.5 times of original motor output torque or more, while producing using permanent magnet Magnetisation is logical, improves electric efficiency.
Detailed description of the invention
Fig. 1 is technical solution of the present invention Hybrid Excitation Switched Reluctance Motor axial section;
Fig. 2 show the stator core structure figure of the technology of the present invention Hybrid Excitation Switched Reluctance Motor.
Fig. 3 is technical solution of the present invention Hybrid Excitation Switched Reluctance Motor rotor core structure chart;
Fig. 4 is technical solution of the present invention Hybrid Excitation Switched Reluctance Motor torque pole winding coil magnetic flux path figure;
Fig. 5 is technical solution of the present invention Hybrid Excitation Switched Reluctance Motor public pole winding coil magnetic flux path figure;
Fig. 6 is technical solution of the present invention Hybrid Excitation Switched Reluctance Motor permanent magnet flux path profile;
Fig. 7 is magnetic flux of the technical solution of the present invention Hybrid Excitation Switched Reluctance Motor permanent magnet when public pole winding works Path profile;
Specific embodiment
As shown in Figure 1, being a kind of Hybrid Excitation Switched Reluctance Motor axial section of the technology of the present invention, by a stator iron 1, four, the heart, 5, one 6 groups of axis of the rotor core of public pole winding coil 4, one of torque winding coil 3, two of permanent magnet 2, four At.Stator core 1 has eight stator tooths.Stator tooth on X+, X-, Y+, Y- four direction as torque pole, above coiling There is torque winding coil 3;At 45 ° with the direction X+, 135 °, 225 °, the stator tooths of 315 ° of angles is public pole, wherein with X+ at 45 °, public pole winding coil 4 is wound with above the public pole of 225 ° of angles;With X+ at 135 °, the public pole of 315 ° of angles and its phase Permanent magnet 2 is inlaid at yoke portion between adjacent torque pole.Permanent magnet 2 is rectangular parallelepiped structure, and axial cross section is square.It is fixed The distance on the pole N of adopted permanent magnet 2 to motor vertex adjacent thereto is L1, the side length of 2 axial section of permanent magnet is Lp, motor shaft It is L to the side length of section.1/5≤L of inequality should then be met1/ L≤1/2, the present invention in take L1/ L=1/5.1 yoke portion of stator core With a thickness of h, internal diameter r, the polar arc degree of public pole stator tooth is αc, torque pole polar arc degree is αt, rotor pole arc degree is αr, rotor polar distanceNrFor 5 number of poles of rotor core, condition should be met αc≥βr.4 the number of turns N of public pole winding coilcWith 3 the number of turns N of torque winding coiltThe ratio between meet 0.5≤Nc/Nt≤ 2, the present invention in Take Nc/Nt=2.The groove width of adjacent torque pole and public pole stator root portion is w, and public pole stator root portion width is L2, then It should meetWhen 5 number of poles of rotor core is N in the present inventionr=10, then turn Sub- pole span isWhen take rotor pole arc degree be αr=19 °, then it can use torque pole polar arc degreePublic pole polar arc degree αcr=36 °.When 1 internal diameter of stator core takes r=53mm, motor axial section side When length takes L=76mm, then L can be obtainedp=h=11mm, L2=20mm,In stator core 1 Portion is rotor core 5, and there are air gaps between stator core 1 and rotor core 5, forms air-gap.It is axis 6 inside rotor core 5.
Fig. 2 show 1 structure chart of stator core of the technology of the present invention Hybrid Excitation Switched Reluctance Motor, four permanent magnets 2 Stator yoke at 135 °, the public pole of 315 ° angles adjacent thereto torque pole between is embedded in X+ respectively.Permanent magnet 2 is Rectangular parallelepiped structure, axial cross section are squares.The distance for defining the pole N to the motor vertex adjacent thereto of permanent magnet 2 is L1, The side length of 2 axial section of permanent magnet is Lp, the side length of motor axial section is L.The polar arc degree of public pole stator tooth is αc, turn Moment pole polar arc degree is αt, 1 yoke portion of stator core is with a thickness of h, internal diameter r, adjacent torque pole and public pole stator root portion Groove width be w, public pole stator root portion width be L2, 1/5≤L of inequality should be met1/ L≤1/2,
Fig. 3 show 5 structure chart of rotor core of the technology of the present invention Hybrid Excitation Switched Reluctance Motor, rotor pole arc degree For αr, rotor polar distanceNrFor 5 number of poles of rotor core, then it should meet conditionαc≥βr
Flux path when the torque winding coil 3 that Fig. 4 show the technology of the present invention Hybrid Excitation Switched Reluctance Motor works Diameter figure, torque winding coil A1 connect with A2, and B1 connects with B2, and two groups of coils circuit sequentially energization, and Fig. 4 is torque winding coil The magnetic flux path figure that A1, A2 are formed when being powered, after coil is powered, the magnetic circuit that A1 phase winding coil generates passes through stator yoke, public Pole stator tooth C1, air gap, rotor core, air gap return to A1 phase, form closed circuit.The magnetic circuit that A2 phase winding coil generates passes through Stator yoke, public pole stator tooth C2, air gap, rotor core, air gap return to A2, form closed circuit.
Fig. 5 show the public pole winding coil C1 of the technology of the present invention Hybrid Excitation Switched Reluctance Motor, when C2 works Magnetic flux path figure.The magnetic flux that C1 phase generates has two paths, and first magnetic circuit is from C1, by air gap, rotor core, gas Gap, A1 phase stator tooth, stator yoke return to C1 phase, form closed circuit;Second paths are from C1, by air gap, rotor iron The heart, air gap, B1 phase stator tooth, stator yoke return to C1 phase, form closed circuit.The magnetic flux that C2 phase generates has two paths, and first Magnetic circuit is from C2, and by air gap, rotor core, air gap, A2 phase stator tooth, stator yoke returns to C2 phase, and formation is closed back Road;Article 2 magnetic circuit is from C2, and by air gap, rotor core, air gap, B2 phase stator tooth, stator yoke returns to C2 phase, formed Closed circuit.
The magnetic flux path figure of permanent magnet 2 when Fig. 6 show the work of the technology of the present invention Hybrid Excitation Switched Reluctance Motor, each The magnetic flux of permanent magnet 2 passes through the public pole stator tooth adjacent with permanent magnet 2, air gap, rotor iron for from the pole N of permanent magnet 2 The heart, air gap return to the pole S of permanent magnet 2 with another public pole stator tooth of permanent magnet 2 on motor same side.
Permanent magnet 2 is in public pole winding coil when Fig. 7 show the work of the technology of the present invention Hybrid Excitation Switched Reluctance Motor Magnetic flux path figure when energization.With permanent magnet P1, for P3, the magnetic flux that permanent magnet P1 is generated passes through public pole from the pole N Stator tooth C4, air gap, rotor core, air gap, torque pole A1 return to the pole S of permanent magnet P1, form closed circuit;Permanent magnet P3 The magnetic flux of generation, from the pole N, by public pole stator tooth C3, air gap, rotor core, torque pole A2 returns to permanent magnet P3's The pole S forms closed circuit.
The good material of 6 magnetic property of axis used in foregoing invention scheme is made, such as No. 45 steel or 40Cr.Rotor core 5 can use the magnetic materials such as the good electric thin steel sheet of magnetic property such as electrical pure iron, electrical steel plate DR510, DR470, DW350 Punching press folds.The material of permanent magnet 2 is the good rare-earth permanent magnet of magnetic property or ferrite permanent magnet, and magnetizing direction is axis To magnetizing.Stator core 1 is made of the good material of magnetic property, such as electrical pure iron, 1J50 or 40Cr.Torque winding coil 3 and public pole winding coil 4 can be formed with paint-dipping drying after the electromagnetic wire coiling of well conducting.

Claims (5)

1. a kind of Hybrid Excitation Switched Reluctance Motor, it is characterised in that: by a stator core (1), four permanent magnets (2), four A torque winding coil (3), two public pole winding coils (4), a rotor core (5), axis (6) composition;Stator iron The heart (1) has eight teeth, is located at X+, X-, Y+, and the stator tooth on Y- four direction is wound with torque winding as torque pole above Coil (3);At 45 ° with the direction X+, 135 °, 225 °, the stator tooth of 315 ° of angles is public pole, wherein it is at 45 ° with the direction X+, Public pole winding coil (4) are wound with above the public pole of 225 ° of angles;With the direction X+ at 135 °, the public pole of 315 ° of angles is distinguished Permanent magnet (2) are inlaid at yoke portion between torque pole adjacent thereto;Permanent magnet (2) is rectangular parallelepiped structure, axial cross section It is square, stator core external form cross section is consistent with permanent magnet, is all square;Permanent magnet if (2) pole N to its phase The distance on adjacent motor vertex is L1, the side length of permanent magnet (2) axial section is Lp, the side length of motor axial section is L, stator Iron core (1) yoke portion is with a thickness of h, internal diameter r;The polar arc degree of public pole stator tooth is αc, the polar arc degree of torque pole stator tooth For αt, rotor pole arc degree is αr, rotor polar distanceNrFor rotor core (5) number of poles, then should meet condition 1/5≤ L1/ L≤1/2, αc≥βr;Public pole winding coil (4) the number of turns NcWith torque winding Coil (3) the number of turns NtThe ratio between meet 0.5≤Nc/Nt≤2;Groove width between adjacent torque pole and public pole stator root portion is W, public pole stator root portion width are L2, then should meet Stator iron It is rotor core (5) that there are air-gap between stator core (1) and rotor core (5), rotor core (5) is interior inside the heart (1) Portion is axis (6).
2. Hybrid Excitation Switched Reluctance Motor according to claim 1, it is characterised in that: the stator core (1) is adopted It is made of the good material of magnetic property.
3. Hybrid Excitation Switched Reluctance Motor according to claim 1, it is characterised in that: the permanent magnet (2) is length Cube, parallel magnetization are made of rare earth material.
4. Hybrid Excitation Switched Reluctance Motor according to claim 1, it is characterised in that: the torque winding coil (3) and public pole winding coil (4) is centralization.
5. Hybrid Excitation Switched Reluctance Motor according to claim 1, it is characterised in that: the axis (6) uses magnetic conduction Material of good performance is made.
CN201710355192.1A 2017-05-19 2017-05-19 A kind of Hybrid Excitation Switched Reluctance Motor Active CN107026550B (en)

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CN105811702A (en) * 2016-03-18 2016-07-27 山东大学 Mixed excitation segmented rotor switch flux motor and working method thereof

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2001258221A (en) * 2000-03-10 2001-09-21 Genesis:Kk Self-starting synchronous motor
WO2006019058A1 (en) * 2004-08-19 2006-02-23 Tohoku University Variable magnetoresistive generator
CN2731815Y (en) * 2004-10-10 2005-10-05 东南大学 Wide speed regulating, double salient pole mixed exciting brushless dynamo
CN1688083A (en) * 2005-04-11 2005-10-26 东南大学 Bidirectional hybrid excitation brushless electric machine
CN101291095A (en) * 2008-06-12 2008-10-22 哈尔滨工业大学 Hybrid switch reluctance motor
CN102231576A (en) * 2011-06-24 2011-11-02 大连名阳实业有限公司 Self-fault tolerance magnetic flux switching permanent magnet motor
WO2016096830A1 (en) * 2014-12-16 2016-06-23 Magna powertrain gmbh & co kg Electric machine, stator for an electric machine and vehicle
CN104967230A (en) * 2015-06-18 2015-10-07 河海大学常州校区 Asymmetric and winding-configuration combined-type doubly-salient hybrid excitation motor
CN104993747A (en) * 2015-07-20 2015-10-21 太原理工大学 12/8 pole three-phase switched reluctance motor hybrid excitation current control method
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