CN103390977A - Fault-tolerant composite motor with magnetic gear - Google Patents
Fault-tolerant composite motor with magnetic gear Download PDFInfo
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- CN103390977A CN103390977A CN2013102726259A CN201310272625A CN103390977A CN 103390977 A CN103390977 A CN 103390977A CN 2013102726259 A CN2013102726259 A CN 2013102726259A CN 201310272625 A CN201310272625 A CN 201310272625A CN 103390977 A CN103390977 A CN 103390977A
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- 239000002131 composite material Substances 0.000 title abstract 3
- 238000004804 winding Methods 0.000 claims abstract description 11
- 210000000515 tooth Anatomy 0.000 claims description 58
- 150000001875 compounds Chemical class 0.000 claims description 31
- 238000000034 method Methods 0.000 abstract description 7
- 230000005540 biological transmission Effects 0.000 abstract description 3
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000010349 pulsation Effects 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 1
- 230000004075 alteration Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
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Abstract
本发明公开了一种容错磁齿轮复合电机，包括五相容错表贴电机和磁齿轮，五相容错表贴电机中的内定子和磁齿轮中的内转子、调制齿和外转子依次由内向外围绕五相容错表贴电机芯轴同轴布置，内转子内侧、内转子和调制齿之间以及调制齿和外转子之间设有永磁体，永磁体之间留有间隙，内定子中设有10个电枢齿和10个容错齿，每个电枢齿上饶有一套集中绕组线圈，本发明提高了磁齿轮复合电机的容错性能，采用内转子上内外两侧永磁体不等的方法，使得内转子上的磁路串并联同行，有效的减小了磁齿轮磁场对容错电机的影响，优化了反电势，增大了传动比，提高了转矩密度。
The invention discloses a fault-tolerant magnetic gear composite motor, which comprises a five-phase fault-tolerant surface-mounted motor and a magnetic gear, and the inner stator in the five-phase fault-tolerant surface-mounted motor, the inner rotor in the magnetic gear, the modulating teeth and the outer rotor in turn from inside to outside Arranged coaxially around the mandrel of the five-phase fault-tolerant surface-mounted motor, permanent magnets are provided on the inner side of the inner rotor, between the inner rotor and the modulating teeth, and between the modulating teeth and the outer rotor. There is a gap between the permanent magnets, and the inner stator is provided with There are 10 armature teeth and 10 fault-tolerant teeth, and each armature tooth has a set of concentrated winding coils. The invention improves the fault-tolerant performance of the magnetic gear composite motor, and adopts the method of unequal permanent magnets on the inner and outer sides of the inner rotor, so that The magnetic circuit on the inner rotor is connected in series and parallel, which effectively reduces the influence of the magnetic gear magnetic field on the fault-tolerant motor, optimizes the back electromotive force, increases the transmission ratio, and improves the torque density.
Description
Technical field
The present invention relates to a kind of fault-tolerant wheel hub motor, particularly the fault-tolerant compound machine of a kind of magnetic gear.
Background technology
Modern drive system is tended to direct driving always, can save the mechanical gear drive system like this, eliminates the vibration noise of mechanical gear, reduces mechanical loss, obtains higher system effectiveness, energy savings.But in order to export larger torque, general volume is larger for the motor that directly drives, and during load running, electric current is larger, has increased the cost of control circuit components and parts.
The advantages such as the magnetic gear has low noise, high efficiency, is convenient to maintenance, high reliability and overload protection, can be used for replacing mechanical gear, realizes the operation of low-speed high-torque in straight drive system.Therefore, the magnetic gear has caused everybody common concern.The structure chart that Fig. 1 is traditional magnetic gear.It modulates tooth 4 by external rotor 5, and internal rotor 2 and permanent magnet 3 form.Modulation tooth number, permanent magnet pole logarithm on magnetic gear internal rotor, on external rotor, the permanent magnet pole logarithm must meet relational expression: P
1=N
s± P
2, wherein, P
2for permanent magnet pole logarithm on magnetic gear internal rotor, N
sfor modulation tooth number, P
1for magnetic gear outer rotor permanent magnet number of pole-pairs.But the magnetic gear needs outside to serve as power source to a motor, make the volume of whole system increase, it is complicated that structure becomes.
In order to improve the torque density of system, in the IEEE VPPC meeting in 3 to 5 September in 2008, the magnetic gear hub motor of mentioning in the paper " An integrated magnetic-geared permanent-magnet in-wheel motor drive for electric vehicles " that Linni Jian, the K.T.Chau of Hong Kong University, J.Z.Jiang propose.The structure chart that Fig. 2 is traditional magnetic gear motor.It modulates tooth 4 by external rotor 5, internal rotor 2, and permanent magnet 3 and internal stator 1 form.For the first time brushless permanent magnet motor is combined with the magnetic gear, reduced the volume and weight of whole system, thereby improved torque density.In this electric system, because the external rotor of magnetic gear internal rotor and brushless permanent magnet motor forms the internal rotor of compound machine jointly, make the inside and outside both sides of internal rotor of compound machine all post permanent magnet, and their polarity is identical, so whole compound machine forms a kind of series circuit, but whole compound machine magnetic circuit coupling, magnetic field influences each other.And the back-emf of motor is poor, cogging torque is also larger, thereby makes motor vibration meeting in the running larger, is not suitable for applying in the direct electric automobile driven of low-speed big.
The main cause of motor short trouble is that winding is short-circuited, and affects the normal operation of motor.Therefore, fault-tolerant motor has very high reliability, more and more causes everybody concern, and Chinese scholars has proposed the fault-tolerant ability that a lot of effective ways improve motor.Finally, centralized winding and fault-tolerant teeth are applied in design of electrical motor reduce motor influencing each other between phase and phase, thereby have improved the fault freedom of motor.In order further to improve the fault-tolerant ability of motor, the selection of permanent magnet pole logarithm and groove number is the key factor that must consider.But reasonable fault-tolerant proportioning is many of permanent magnet pole logarithm ratio often, can run into a lot of problems so when selecting the magnetic gear to increase its output: gearratio is too small, the torque balance of the both sides of internal rotor can't be met etc.
Summary of the invention
For problems of the prior art, the object of the present invention is to provide a kind of fault-tolerant motor to combine with the magnetic gear, improved the fault freedom of magnetic gear compound machine, and consider back-emf, cogging torque, the factors such as magnetic gear ratio, adopt the method that on internal rotor, inside and outside both sides permanent magnet does not wait, making the magnetic circuit on internal rotor is no longer independent series connection, but connection in series-parallel colleague, effectively reduced the impact of magnetic gear magnetic field on fault-tolerant motor, optimized back-emf, increased gearratio, improved the fault-tolerant compound machine of magnetic gear of torque density.
To achieve these goals, the present invention is by the following technical solutions: a kind of fault-tolerant magnetic gear compound machine, comprise five mutually fault-tolerant Surface Mount motor and magnetic gears, described magnetic gear comprises internal rotor, permanent magnet, modulation tooth and external rotor, described five mutually fault-tolerant Surface Mount motors comprise internal stator, described internal stator, internal rotor, modulation tooth and external rotor are coaxially arranged around five mutually fault-tolerant Surface Mount motor mandrels from inside to outside successively, described internal rotor inboard, be provided with permanent magnet between internal rotor and modulation tooth and between modulation tooth and external rotor, leave gap between described permanent magnet, be provided with 10 armature tooths and 10 fault-tolerant teeths in described internal stator, be full of a set of concentrated winding coil on described each armature tooth, described modulation tooth number, permanent magnet pole logarithm between internal rotor and modulation tooth, between modulation tooth and external rotor, the permanent magnet pole logarithm meets relational expression: P
1=N
s± P
2, P wherein
2for permanent magnet pole logarithm between internal rotor and modulation tooth, N
sfor modulation tooth number, P
1for permanent magnet pole logarithm between modulation tooth and external rotor.The number of poles of described five mutually fault-tolerant Surface Mount motors is 22, the groove number is 20.Permanent magnet pole logarithm between described internal rotor inboard and internal rotor and modulation tooth does not wait.Magnetic circuit on described internal rotor is the connection in series-parallel colleague.
After adopting technique scheme, the present invention has following beneficial effect:
1. the present invention combines fault-tolerant motor with the magnetic gear, form a kind of magnetic gear compound machine, compare with traditional fault-tolerant motor, added the magnetic gear well to improve output torque and the torque density of motor, and realized the operation of low-speed high-torque by the magnetic gear.
2. the present invention combines fault-tolerant motor with the magnetic gear, with traditional magnetic gear compound machine, compares, and the present invention has introduced fault-tolerant motor and reduced to influence each other between phase and phase, thereby has improved the fault freedom of compound machine.
3. the present invention considers the factors such as the fault freedom of motor and magnetic gear ratio size, adopt the method that on internal rotor, inside and outside both sides permanent magnet pole logarithm does not wait, make fault-tolerant motor adopt reasonable utmost point groove proportioning, and the gearratio of magnetic gear height relatively, torque density is larger.
4. on internal rotor of the present invention, inside and outside both sides permanent magnet pole logarithm does not wait, therefore, magnetic circuit on the compound machine internal rotor be series connection be also in parallel, part parallel circuits can reduce the impact of magnetic gear magnetic field on fault-tolerant motor magnetic field, reduced the aberration rate of the back-emf of fault-tolerant motor, thus the vibration while having reduced the compound machine operation.
5. the armature winding on stator of the present invention adopts and concentrates winding, and rule is convenient, and end is shorter, can reduce resistance and the copper loss of motor.
The accompanying drawing explanation
Fig. 1 is traditional magnetic gear structure schematic diagram.
Fig. 2 is traditional magnetic gear compound machine structural representation.
Fig. 3 is a kind of fault-tolerant magnetic gear compound machine structural representation of the present invention.
Fig. 4 is embodiment of the present invention compound machine winding connection schematic diagram.
Fig. 5 is embodiment of the present invention compound machine no-load magnetic field distribution map.
Fig. 6 is embodiment of the present invention compound machine counter potential waveform figure and back-emf percent harmonic distortion oscillogram.
Fig. 7 is embodiment of the present invention compound machine A phase inductance oscillogram.
Fig. 8 is embodiment of the present invention compound machine output torque oscillogram.
In figure: 1, internal stator 2, internal rotor 3, permanent magnet 4, modulation tooth 5, external rotor 6, armature tooth 7, fault-tolerant teeth 8, winding coil.
Embodiment
Below according to Figure of description and specific embodiment, the present invention is further explained.
As shown in Figure 3, a kind of fault-tolerant magnetic gear compound machine, comprise five mutually fault-tolerant Surface Mount motor and magnetic gears, described magnetic gear comprises internal rotor 2, permanent magnet 3, modulation tooth 4 and external rotor 5, described five mutually fault-tolerant Surface Mount motors comprise internal stator 1, described internal stator 1, internal rotor 2, modulation tooth 4 and external rotor 5 are coaxially arranged around five mutually fault-tolerant Surface Mount motor mandrels from inside to outside successively, described internal stator 1, internal rotor 2, between modulation tooth 4 and external rotor 5 rotors, one deck air gap is arranged, the air gap so whole compound machine haves three layers, described internal rotor 2 inboards, be provided with permanent magnet 3 between internal rotor 2 and modulation tooth 4 and between modulation tooth 4 and external rotor 5, the permanent magnet 3 of described internal rotor 2 inboards has along the circumferential direction Surface Mount of 22 fritter permanent magnets 3, totally 11 pairs of utmost points, pole embrace is 0.85, permanent magnet 3 between described internal rotor 2 and modulation tooth 4 has along the circumferential direction Surface Mount of 6 fritter permanent magnets 3, totally 3 pairs of utmost points, pole embrace is similarly 0.85, permanent magnet 3 between described modulation tooth 4 and external rotor 5 has along the circumferential direction Surface Mount of 56 fritter permanent magnets 3, totally 28 pairs of utmost points, between each piece permanent magnet 3, ending is connected, pole embrace is 1, leave gap between described permanent magnet 3, be provided with 10 armature tooths 6 and 10 fault-tolerant teeths 7 in described internal stator 1, be full of a set of concentrated winding coil 8 on described each armature tooth 6.
As shown in Figure 4, described 10 armature tooths 6 are divided into five groups of A, B, C, D, E, and A1 and A2, B1 and B2, C1 and C2, D1 and D2, E1 are corresponding to concentrating winding coil 8 to interconnect in twos with E2.Between described modulation tooth 4 numbers, internal rotor 2 and modulation tooth 4 between permanent magnet 3 numbers of pole-pairs, modulation tooth 4 and external rotor 5 permanent magnet 3 numbers of pole-pairs meet relational expression: P
1=N
s± P
2, P wherein
2for permanent magnet 3 numbers of pole-pairs between internal rotor 2 and modulation tooth 4, N
sfor modulation tooth 4 numbers, P
1for permanent magnet 3 numbers of pole-pairs between modulation tooth 4 and external rotor 5.Gearratio G
r=| mP
2+ kN
s|/mP
2, m=1 wherein, 3,5 ..., ∞, k=0, ± 1, ± 2, ± 3 ..., ± ∞, work as m=1, during k=-1, and the transmission best results of magnetic gear, G
r=28/3=9.33, wherein P
2=3, P
1=28.The number of poles of described five mutually fault-tolerant Surface Mount motors is 22, the groove number is 20.Permanent magnet 3 numbers of pole-pairs between described internal rotor 2 inboards and internal rotor 2 and modulation tooth 4 do not wait.
As shown in Figure 5, the magnetic line of force can pass through three layers of air gap, and these magnetic lines of force can be regarded the transmission of motor torque and the conversion of power as.Magnetic circuit on described internal rotor 2 is the connection in series-parallel colleague.The magnetic line of force on internal rotor 2 be series connection be also in parallel, this is because internal rotor 2 both sides permanent magnet 3 numbers of pole-pairs do not wait, and makes the permanent magnet 3 of both sides same polarity can't be one by one corresponding, the situation of both sides permanent magnet 3 polar repulsions occurs.Between the permanent magnet 3 of both sides same polarity, form series circuit, and form parallel circuits between the permanent magnet 3 of both sides opposite polarity.It can also be seen that from figure stator tooth is all to form loop between armature tooth 6 and fault-tolerant teeth 7 through every phase magnetic line of force, almost there is no magnetic line of force linkage to other adjacent phases, alternate coupling is very little, and each is mutually separate.
As shown in Figure 6, in order better to differentiate the quality of back-emf, introduce this judgment criteria of back-emf percent harmonic distortion, as seen from the figure, it is little that the back-emf percent harmonic distortion of motor compares, and can say back-emf or reasonable.Mainly contain following two reasons: 1 is mainly relatively good of Optimization Work of fault-tolerant motor, so the back-emf harmonic distortion is little; 2 is mainly the method that adopts internal rotor 2 both sides permanent magnet 3 numbers of pole-pairs not wait, and makes on internal rotor 2 and has formed parallel circuits and series circuit.Parallel circuits can reduce the impact of magnetic gear magnetic field on fault-tolerant motor magnetic field, thereby reduces the percent harmonic distortion of whole compound machine back-emf.
As shown in Figure 7, can find out that the mutual inductance of A phase is approximately 0, so the present invention has higher fault freedom.
As shown in Figure 8, can find out large of last output torque ratio, thereby torque density is larger, and relatively little of the torque pulsation of motor.Be mainly not make the gearratio of compound machine larger because internal rotor 2 inside and outside both sides permanent magnet 3 numbers of pole-pairs do not wait, and adopt the form of compound machine, reduced the volume and weight of whole motor, so torque density is larger.Torque pulsation is smaller is because cogging torque and back-emf percent harmonic distortion are all smaller when main.
In sum, whole motor is composited by fault-tolerant motor and magnetic gear, and the method that fault-tolerant surface-mount type motor adopts armature tooth 6 and fault-tolerant teeth 7 not to wait improves the groove area of motor, thereby improves the performance of motor.Consider the situation of the fault-tolerant performance of compound machine, magnetic gear ratio and torque output, adopted the method that the number of pole-pairs of the permanent magnet 3 of internal rotor 2 inside and outside both sides does not wait to meet above-mentioned requirement.The present invention has higher torque density, larger gearratio, and less cogging torque, higher fault freedom, symmetrical back-emf preferably, higher efficiency, be applicable to the direct drive electric automotive field.
Claims (4)
1. a fault-tolerant magnetic gear compound machine, comprise five mutually fault-tolerant Surface Mount motor and magnetic gears, described magnetic gear comprises internal rotor, permanent magnet, modulation tooth and external rotor, described five mutually fault-tolerant Surface Mount motors comprise internal stator, it is characterized in that described internal stator, internal rotor, modulation tooth and external rotor are coaxially arranged around five mutually fault-tolerant Surface Mount motor mandrels from inside to outside successively, described internal rotor inboard, be provided with permanent magnet between internal rotor and modulation tooth and between modulation tooth and external rotor, leave gap between described permanent magnet, be provided with 10 armature tooths and 10 fault-tolerant teeths in described internal stator, be full of a set of concentrated winding coil on described each armature tooth, described modulation tooth number, permanent magnet pole logarithm between internal rotor and modulation tooth, between modulation tooth and external rotor, the permanent magnet pole logarithm meets relational expression: P
1=N
s± P
2, P wherein
2for permanent magnet pole logarithm between internal rotor and modulation tooth, N
sfor modulation tooth number, P
1for permanent magnet pole logarithm between modulation tooth and external rotor.
2. a kind of fault-tolerant magnetic gear compound machine according to claim 1, is characterized in that
The number of poles of described five mutually fault-tolerant Surface Mount motors is 22, the groove number is 20.
3. a kind of fault-tolerant magnetic gear compound machine according to claim 1, is characterized in that
Permanent magnet pole logarithm between described internal rotor inboard and internal rotor and modulation tooth does not wait.
4. a kind of fault-tolerant magnetic gear compound machine according to claim 1, is characterized in that
Magnetic circuit on described internal rotor is the connection in series-parallel colleague.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104009602A (en) * | 2014-05-09 | 2014-08-27 | 东南大学 | Magnetic Gear Power Splitter |
| CN105958762A (en) * | 2016-04-26 | 2016-09-21 | 江苏大学 | Novel high torque density high power factor fault tolerant permanent magnet vernier machine and its modulation method |
| CN110048568A (en) * | 2019-03-07 | 2019-07-23 | 江苏大学 | A kind of outer rotor vernier motor for electric vehicle-magnetic gear compound machine |
| CN110291705A (en) * | 2018-01-23 | 2019-09-27 | 深圳市赫瑞科技有限公司 | A kind of magnetic control motor integrating |
| CN111525768A (en) * | 2019-02-01 | 2020-08-11 | 香港中文大学 | Human body kinetic energy collecting device and conversion method thereof |
| CN112713737A (en) * | 2020-12-31 | 2021-04-27 | 江南大学 | Two-stage magnetic gear transmission motor for robot joint |
| US11646618B2 (en) | 2018-10-31 | 2023-05-09 | Optiphase Drive Systems, Inc. | Electric machine with permanent magnet rotor |
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| JPH10243623A (en) * | 1997-02-21 | 1998-09-11 | Oriental Motor Co Ltd | Permanent magnet motor |
| CN202713100U (en) * | 2012-06-13 | 2013-01-30 | 江苏大学 | Low-speed and large-torque five-phase permanent magnetism fault tolerance motor for electromobile |
| CN203339912U (en) * | 2013-06-28 | 2013-12-11 | 江苏大学 | A Magnetic Gear Fault Tolerant Composite Motor |
-
2013
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| JPH10243623A (en) * | 1997-02-21 | 1998-09-11 | Oriental Motor Co Ltd | Permanent magnet motor |
| CN202713100U (en) * | 2012-06-13 | 2013-01-30 | 江苏大学 | Low-speed and large-torque five-phase permanent magnetism fault tolerance motor for electromobile |
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Non-Patent Citations (2)
| Title |
|---|
| K.ATALLAH等: ""A Novel High-performance Magnetic Gear"", 《IEEE TRANSACTIONS ON MAGNETICS》, vol. 37, no. 4, 31 July 2001 (2001-07-31), pages 2844 - 2846 * |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104009602A (en) * | 2014-05-09 | 2014-08-27 | 东南大学 | Magnetic Gear Power Splitter |
| CN104009602B (en) * | 2014-05-09 | 2017-01-11 | 东南大学 | Magnetic gear power divider |
| CN105958762A (en) * | 2016-04-26 | 2016-09-21 | 江苏大学 | Novel high torque density high power factor fault tolerant permanent magnet vernier machine and its modulation method |
| CN105958762B (en) * | 2016-04-26 | 2018-04-17 | 江苏大学 | A kind of fault-tolerant permanent magnetism vernier motor of new high torque density High Power Factor and its modulator approach |
| CN110291705A (en) * | 2018-01-23 | 2019-09-27 | 深圳市赫瑞科技有限公司 | A kind of magnetic control motor integrating |
| US11646618B2 (en) | 2018-10-31 | 2023-05-09 | Optiphase Drive Systems, Inc. | Electric machine with permanent magnet rotor |
| CN111525768A (en) * | 2019-02-01 | 2020-08-11 | 香港中文大学 | Human body kinetic energy collecting device and conversion method thereof |
| US11316405B2 (en) | 2019-02-01 | 2022-04-26 | The Chinese University Of Hong Kong | Human motion energy harvesting apparatus and conversion method thereof |
| CN110048568A (en) * | 2019-03-07 | 2019-07-23 | 江苏大学 | A kind of outer rotor vernier motor for electric vehicle-magnetic gear compound machine |
| CN112713737A (en) * | 2020-12-31 | 2021-04-27 | 江南大学 | Two-stage magnetic gear transmission motor for robot joint |
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