CN103840586B - Permanent-magnetic outer rotor wheel hub motor - Google Patents
Permanent-magnetic outer rotor wheel hub motor Download PDFInfo
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- CN103840586B CN103840586B CN201410070420.7A CN201410070420A CN103840586B CN 103840586 B CN103840586 B CN 103840586B CN 201410070420 A CN201410070420 A CN 201410070420A CN 103840586 B CN103840586 B CN 103840586B
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Abstract
The invention provides a kind of permanent-magnetic outer rotor wheel hub motor, comprise internal stator assembly and outer rotor component; Described outer rotor component comprises rotor punching; Described rotor punching is fixed with multiple magnet steel, and multiple described magnet steel is evenly arranged into annulus, and described annulus is set on described internal stator assembly, and described annulus is coaxial with described internal stator assembly; In described annulus, the pole orientation of adjacent two described magnet steel is contrary, and pole orientation is pointed to respectively or deviated from the axis of described internal stator assembly; Be provided with tangential magnet between every two adjacent described magnet steel, the pole orientation of each described tangential magnet is all identical with the tangential direction of described annulus, and the pole orientation of close on two described tangential magnets is contrary.Motor of the present invention arranges tangential magnet between adjacent two magnet steel on rotor punching, thus tangential magnet is superposed mutually with the magnetic force of magnet steel; Simultaneously the volume of radial magnet not outside occupying volume, adds the magnetic flux density in air gap, improves the torque density of motor.
Description
Technical field
The present invention relates to distributed In-wheel motor driving technology, particularly relate to a kind of permanent-magnetic outer rotor wheel hub motor, belong to wheel hub motor manufacturing technology field.
Background technology
Wheel hub motor as the critical component of hub drive system, need with wheel closely integrated, wheel hub motor body design not only affects the general performance of motor performance, to car load by property, mobility even stability all have a significant effect.Wheel hub motor because wheel hub motor is directly connected with wheel, do not have decelerator to carry out the amplification of torque, meets the power demand of electric automobile again, so must have high pulling torque, energy consumption is little, energy density is high and torque density is high feature; Simultaneously because wheel hub motor is directly integrated in inside wheel, so require that wheel hub motor has the highest performance in limited space, therefore, wheel hub motor also needs to have the little feature of volume.
Fig. 1 is the structure chart of wheel hub motor in prior art; The wheel hub motor of prior art comprises internal stator assembly 4 and outer rotor component; Outer rotor component comprises rotor punching 3; Rotor punching 3 is fixed with multiple magnet steel 1 ' and magnet steel 1, these magnet steel are arranged in an annulus that can be set on internal stator assembly 4, the annulus that magnet steel is arranged in is coaxial with internal stator assembly 4, namely the radial direction of internal stator assembly 4 corresponding with annulus and between there is air gap 5; In the magnet steel of annulus arrangement, the pole orientation contrary (namely inner magnet line of induction direction is contrary) of adjacent two magnet steel 1 and magnet steel 1 '; Further, the pole orientation of magnet steel 1 deviates from the axis of internal stator assembly 4, and the pole orientation of magnet steel 1 ' points to the axis of internal stator assembly 4.Because the distance of the air gap 5 of motor is constant, if the torque density of motor will be increased, then must improve the magnetic flux density in air gap 5.
In prior art, for improving magnetic flux density, generally all adopting the thickness unshakable in one's determination increasing internal stator assembly 4 and comprise, or increasing the volume of magnet steel; But increase thickness unshakable in one's determination and magnet steel volume all can cause the volume of motor to increase, be difficult to meet wheel hub motor under less volume, realize the high requirement of torque density.
Summary of the invention
For solving the wheel hub motor technical problem that motor gas-gap magnetic flux density is lower under unit volume, motor torque density is too low in prior art, under the invention provides a kind of motor volume not increase situation, the permanent-magnetic outer rotor wheel hub motor that motor gas-gap magnetic flux density is higher, motor torque density is higher.
Permanent-magnetic outer rotor wheel hub motor provided by the invention, comprises internal stator assembly and outer rotor component; Described outer rotor component comprises rotor punching; Described rotor punching is fixed with multiple magnet steel, and multiple described magnet steel is evenly arranged into annulus, and described annulus is set on described internal stator assembly, and described annulus is coaxial with described internal stator assembly;
In described annulus, the pole orientation of adjacent two described magnet steel is contrary, and pole orientation is pointed to respectively or deviated from the axis of described internal stator assembly;
Be provided with tangential magnet between every two adjacent described magnet steel, the pole orientation of each described tangential magnet is all identical with the tangential direction of described annulus, and the pole orientation of close on two described tangential magnets is contrary.
Permanent-magnetic outer rotor wheel hub motor of the present invention, owing to being provided with tangential magnet between two magnet steel adjacent on rotor punching, and the pole orientation of adjacent tangential magnet is contrary, thus the magnetic force of tangential magnet is superposed mutually with the magnetic force of magnet steel, magnet steel end can increase towards the magnetic flux density of internal stator assembly; Simultaneously because radial magnet is distributed between magnet steel, the volume not outside occupying volume, so when motor volume inconvenience, add the magnetic flux density in air gap, namely improves the torque density of motor.
Accompanying drawing explanation
Fig. 1 is the structure chart of wheel hub motor in prior art;
Fig. 2 is the structure chart of the permanent-magnetic outer rotor wheel hub motor of the embodiment of the present invention;
Fig. 3 is the magnetic steel structure figure of the permanent-magnetic outer rotor wheel hub motor of another embodiment of the present invention;
Fig. 4 is the structure chart of the permanent-magnetic outer rotor wheel hub motor of another embodiment of the present invention.
Embodiment
Fig. 2 is the permanent-magnetic outer rotor wheel hub motor of the structure chart of the permanent-magnetic outer rotor wheel hub motor of the embodiment of the present invention, the present embodiment, comprises internal stator assembly 4 and outer rotor component; Outer rotor component is fixedly connected with the casing of motor, and motor case is the wheel hub of wheel, and directly drive vehicle wheel rotation when motor runs, outer rotor component comprises rotor punching 3; Internal stator assembly 4 is provided with multiple equally distributed wire casing 40 diametrically, is provided with winding coil in wire casing 40, and the surrounding of winding coil is provided with the iron core for increasing magnetism intensity.Rotor punching 3 is fixed with multiple magnet steel 1 ' and magnet steel 1, magnet steel 1 ' and magnet steel 1 are alternately arranged into an annulus that can be set on internal stator assembly 4, the annulus that magnet steel is arranged in is coaxial with internal stator assembly 4, namely the radial direction of internal stator assembly 4 corresponding with inside annulus and between there is air gap 5; In the magnet steel of annulus arrangement, the pole orientation contrary (namely inner magnet line of induction direction is contrary) of adjacent two magnet steel 1 and magnet steel 1 '; Further, as shown in the direction of arrow in Fig. 2, in adjacent two magnet steel, the pole orientation of magnet steel 1 deviates from the axis of internal stator assembly 4, and the pole orientation of magnet steel 1 ' points to the axis of internal stator assembly 4.Upon power-up, namely outer rotor component starts to rotate the winding coil that internal stator assembly 4 comprises under the magneticaction of magnet steel.
In the present embodiment, between every two adjacent magnet steel (namely between magnet steel 1 and magnet steel 1 ') be provided with tangential magnet 2 or 2 ', each tangential magnet 2 or 2 ' pole orientation all identical with the tangential direction of the annulus that magnet steel forms (namely the annulus that all forms with magnet steel of the pole orientation of tangential magnet is tangent, in other words perpendicular to the radius of annulus), and the pole orientation of close on two tangential magnets (tangential magnet 2 and tangential magnetic 2 ') is contrary.Because all there is the magnet steel that two pole orientation are different the both sides of each tangential magnet, thus each magnetic force of tangential magnet is superposed with the magnetic picture of magnet steel, add magnetic flux density between magnet steel and internal stator assembly 4, the magnetic flux density namely in air gap 5 increases.
At the permanent-magnetic outer rotor wheel hub motor of the present embodiment, owing to being provided with tangential magnet between adjacent two magnet steel on rotor punching 3, and the pole orientation of adjacent tangential magnet is contrary, thus the magnetic force of tangential magnet is superposed mutually with the magnetic force of magnet steel, magnet steel end increases towards the magnetic flux density of internal stator assembly; Meanwhile, radial magnet is distributed between magnet steel, the volume not outside occupying volume, so when motor volume inconvenience, add the magnetic flux density in air gap 5, namely improves the torque density of motor.Equally, when wheel hub motor peak torque density is constant, adopt the structure of the present embodiment wheel hub motor, the axial dimension (i.e. the core dimensions in internal stator assembly upper magnet yoke portion) of electric motor internal stator assembly can reduce, and the volume of motor can be less.It should be noted that in addition, owing to being provided with tangential magnet between adjacent two magnet steel, the magnetic flux density that each magnet steel deviates from the direction of internal stator assembly 4 reduces, and decreases the electromagnetic effect to miscellaneous part.
Fig. 3 is the magnetic steel structure figure of the permanent-magnetic outer rotor wheel hub motor of another embodiment of the present invention.On the basis of above-described embodiment, in the present embodiment, each magnet steel comprises: two radial magnets, and these two radial magnets are one group, are all fixed on rotor punching 3; Radial magnet often in group is arranged between adjacent two tangential magnets along the tangential direction of annulus, is namely provided with one group of radial magnet between every two adjacent tangential magnets; The pole orientation of two pieces of radial magnets included by each magnet steel is consistent with the pole orientation of this magnet steel, and namely the pole orientation of radial magnet is in the radial direction of internal stator assembly.Generally, each magnet steel is radially on average divided into two pieces.Namely as shown in Figure 3, magnet steel 1 comprises two pieces of radial magnets 10, and the pole orientation of radial magnet 10 is identical with magnet steel 1; Magnet steel 1 ' comprises two pieces of radial magnets 10 ', and radial magnet 10 ' is identical with magnet steel 1 ' pole orientation; Radial magnet 10 or 10 ' be all fixed on rotor punching 3.As Fig. 3, two radial magnets 10 included by each magnet steel 1, their pole orientation is consistent and deviate from the axis of internal stator assembly 4; Two radial magnets 10 ' included by each magnet steel 1 ', their pole orientation is also consistent and towards the axis of internal stator assembly 4.In addition, often organize in radial magnet, the tangential magnet that the side of each radial magnet is adjacent with this radial magnet leans, and another radial magnet in the opposite side of this radial magnet and this group leans; In other words, between adjacent two tangential magnets, close-packed arrays has two pieces of radial magnet.For Fig. 3, in each magnet steel 1 ', radial magnet 10 ' and radial magnet 10 ' mutually against, radial magnet 10 ' contacts with tangential magnet 2, and another radial magnet 10 ' contacts with tangential magnet 2 '.Because each magnet steel is split into two radial magnets, from but each tangential magnet can be adjacent with two ends radial magnet close contact, thus the magnetic flux density a of three magnet entirety is enhanced in the direction of radial magnet towards internal stator assembly 4; In addition, because each magnet steel is split into two radial magnets, the arrangement of each radial magnet can be freer.
On the basis of above-described embodiment, rotor punching 3 is provided with and is multiplely convenient to magnet steel 1 or 1 ' positioning tooth 30 that positions, two radial magnets included by each magnet steel contact with positioning tooth 30 respectively; Each positioning tooth 30 is often being organized between in radial magnet two radial magnets, and namely two radial magnets 10 lay respectively at the both sides of positioning tooth 30, and two radial magnets 10 ' lay respectively at the both sides of positioning tooth 30.The side of each radial magnet contacts with positioning tooth 30, opposite side and tangential magnet 2 or 2 ' contact.Positioning tooth 30 can adopt the mode of punching press to protrude from rotor punching 3.Because magnet steel magnetic force is large, and adjacent two pieces of magnetic steel magnetic pole directions are inconsistent, so wheel hub motor during fabrication, magnet steel is difficult to be fixed on rotor punching 3.When rotor punching 3 is provided with positioning tooth 30, two radial magnets included by each magnet steel all can rely on positioning tooth 30 to position and arrange, and facilitate assembling and the manufacture of outer rotor component, improve the production efficiency of motor.Positioning tooth 30 can adopt triangle positioning tooth, other also can be adopted to be beneficial to the shape of fixed radial magnet, as inner circle arc.
On the basis of above-described embodiment, two radial magnets at each tangential magnet and these tangential magnet two ends, common formation domes; Such as, tangential magnet 2, radial magnet 10 ' and radial magnet 10 form domes jointly; The Inner arc of these domes is towards the axis of internal stator assembly 4.When two radial magnets at each tangential magnet and its this tangential magnet two ends form domes jointly, three is arc-shaped structure, or the contact portion of each radial magnet and positioning tooth 30 is provided with chamfering, general preferred employing circular arc chamfering, this makes it possible to make three magnets between two adjacent positioning tooths 30 to form domes, which enhances motor reliability and fail safe.As Fig. 3, when all tangential magnets and all radial magnets all adopt arc-shaped structure, all tangential magnets and all radial magnets can form a gapless annulus, substantially reduce the radial volume of outer rotor component.
The arrangement of the domes magnet in the present embodiment combines with above-described embodiment, makes wheel hub motor superior performance of the present invention, torque density is high, wide area is efficient, volume is little, lightweight, compact conformation; Manufacture craft is simple simultaneously, and stable and reliable operation, is suitable for large-scale promotion application, can have a tremendous social and economic benefits.
Fig. 4 is the structure chart of the permanent-magnetic outer rotor wheel hub motor of another embodiment of the present invention, on the basis of above-described embodiment, further, internal stator assembly 4 is provided with multiple being uniformly distributed and wire casing 40 for holding winding coil diametrically, and the winding coil arranged in each wire casing 40 is corresponding with the annulus that magnet steel forms; Namely the end of wire casing 40 is towards magnet steel; The quantity of magnet steel and wire casing 40 is respectively the integral multiple of 8:9.Because each magnet steel comprises two radial magnets, and two radial magnets rely on again positioning tooth 30 to locate, so positioning tooth 30 is also 8:9 with the number ratio of wire casing 40; The pole slot fit of wheel hub motor is the integral multiple of 8/9 in other words.The pole slot fit of 8/9 effectively balances the unbalanced magnetic pull of wheel hub motor.Preferred version is, the quantity of magnet steel is 32, and the quantity of wire casing 40 is 36; Under so concrete number ratio, best counterbalance effect can be obtained, and cogging torque and torque pulsation little, improve the dynamic property of wheel hub motor, can realize high-precision private clothes drive.
Internal stator assembly 4 is provided with multiple wire casing 40 along radial direction distribution, wire casing 40 is stator lasmination groove, and the winding coil in each wire casing 40 is the double-deck concentratred winding of three-phase fractional-slot, and winding coil is positioned at stator lasmination groove and is divided into double-deck and distributes vertically.The double-deck concentratred winding of three-phase fractional-slot can reduce the end span of internal stator assembly 4, save wire casing 40 end space, decrease motor axial dimension, weaken the back-emf slot ripples of motor like this, improve counter potential waveform, also improve the utilance of wire casing 40 in internal stator assembly 4 accordingly.
Last it is noted that above each embodiment is only in order to illustrate technical scheme of the present invention, be not intended to limit; Although with reference to foregoing embodiments to invention has been detailed description, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of various embodiments of the present invention technical scheme.
Claims (7)
1. a permanent-magnetic outer rotor wheel hub motor, is characterized in that, comprises internal stator assembly and outer rotor component; Described outer rotor component comprises rotor punching; Described rotor punching is fixed with multiple magnet steel, and multiple described magnet steel is evenly arranged into annulus, and described annulus is set on described internal stator assembly, and described annulus is coaxial with described internal stator assembly;
In described annulus, the pole orientation of adjacent two described magnet steel is contrary, and pole orientation is pointed to respectively or deviated from the axis of described internal stator assembly;
Be provided with tangential magnet between every two adjacent described magnet steel, the pole orientation of each described tangential magnet is all identical with the tangential direction of described annulus, and the pole orientation of close on two described tangential magnets is contrary;
Each described magnet steel comprises two radial magnets be fixed on described rotor punching, and described two radial magnets are one group, and the described radial magnet often in group is arranged between adjacent two described tangential magnets along the tangential direction of described annulus; Often organize in radial magnet, the described tangential magnet that the side of each radial magnet is adjacent with this radial magnet leans, and another radial magnet in opposite side and this group leans; The pole orientation of two radial magnets included by each described magnet steel is consistent with the pole orientation of this magnet steel.
2. permanent-magnetic outer rotor wheel hub motor according to claim 1, is characterized in that, described rotor punching is provided with multiple positioning tooth for positioning described radial magnet; Each described positioning tooth is between described two radial magnets often organized in radial magnet.
3. permanent-magnetic outer rotor wheel hub motor according to claim 2, is characterized in that, two described radial magnets that each described tangential magnet contacts with these tangential magnet two ends, common formation domes; The Inner arc of described domes is towards the axis of described internal stator assembly.
4. according to the arbitrary described permanent-magnetic outer rotor wheel hub motor of claim 1-3, it is characterized in that, described internal stator assembly is provided with multiple being uniformly distributed and wire casing for holding winding coil diametrically, and the quantity of described magnet steel and described wire casing is respectively the integral multiple of 8:9.
5. permanent-magnetic outer rotor wheel hub motor according to claim 2, is characterized in that, described positioning tooth is triangle positioning tooth.
6. permanent-magnetic outer rotor wheel hub motor according to claim 3, is characterized in that, two described radial magnets that each described tangential magnet contacts with these tangential magnet two ends, and three is arc-shaped structure.
7. permanent-magnetic outer rotor wheel hub motor according to claim 4, is characterized in that, the quantity of described magnet steel is 32, and the quantity of described wire casing is 36.
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| CN201410070420.7A CN103840586B (en) | 2014-02-27 | 2014-02-27 | Permanent-magnetic outer rotor wheel hub motor |
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| CN201410070420.7A CN103840586B (en) | 2014-02-27 | 2014-02-27 | Permanent-magnetic outer rotor wheel hub motor |
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| CN103840586B true CN103840586B (en) | 2016-04-27 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105846568A (en) * | 2016-03-23 | 2016-08-10 | 东南大学 | Modularized rotor of outer rotor hub motor |
| CN111600405B (en) * | 2019-02-21 | 2023-09-22 | 北京金风科创风电设备有限公司 | Magnetic pole module, rotor, assembling method of rotor and motor |
| CN112865372A (en) * | 2021-03-31 | 2021-05-28 | 无锡市铭淇电动科技有限公司 | Brushless DC motor's novel magnet steel structure's rotor and motor |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1864316A (en) * | 2003-08-02 | 2006-11-15 | 猪木宽至 | Rotating electric machine |
| US7646124B2 (en) * | 2007-02-15 | 2010-01-12 | Hamilton Sundstrand Corporation | Magnet retention system for permanent magnet motors and generators |
| CN101944787B (en) * | 2009-07-10 | 2012-09-05 | 上海电驱动有限公司 | Outer surface structure of magnetic steel embedded rotor |
| CN102035274A (en) * | 2010-12-10 | 2011-04-27 | 上海电机学院 | Radial-structure magnetized outer rotor double-salient motor |
| CN102545433A (en) * | 2012-01-09 | 2012-07-04 | 美的威灵电机技术（上海）有限公司 | Tangential rotor for rotating motor |
| CN203206019U (en) * | 2013-04-26 | 2013-09-18 | 重庆东桐科技有限公司 | Rotor structure of embedded tangential magnetic field brushless direct current motor |
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Effective date of registration: 20210408 Address after: 341003 No.36, Huangjin Avenue, Ganzhou economic and Technological Development Zone, Ganzhou City, Jiangxi Province Patentee after: Jiangxi Rare Earth Research Institute, Chinese Academy of Sciences Address before: 201821 No. 1631, Yecheng Road, Shanghai, Jiading District Patentee before: Shanghai Zhongke Shenjiang Electric Vehicle Co.,Ltd. |
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Effective date of registration: 20211220 Address after: 341000 Room 301, science and technology maker space, No. 1, torch Avenue, Ganzhou high tech Industrial Development Zone, Ganxian District, Ganzhou City, Jiangxi Province Patentee after: Zhongke Fusion Technology Development Co.,Ltd. Address before: 341003 No.36, Huangjin Avenue, Ganzhou economic and Technological Development Zone, Ganzhou City, Jiangxi Province Patentee before: Jiangxi Rare Earth Research Institute, Chinese Academy of Sciences |
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Effective date of registration: 20220127 Address after: 341003 No.36, Huangjin Avenue, Ganzhou economic and Technological Development Zone, Ganzhou City, Jiangxi Province Patentee after: Jiangxi Rare Earth Research Institute Chinese Academy of Sciences Address before: 341000 Room 301, science and technology maker space, No. 1, torch Avenue, Ganzhou high tech Industrial Development Zone, Ganxian District, Ganzhou City, Jiangxi Province Patentee before: Zhongke Fusion Technology Development Co.,Ltd. |