CN106411100A - Coaxial magnetic gear with static excitation ring - Google Patents
Coaxial magnetic gear with static excitation ring Download PDFInfo
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- CN106411100A CN106411100A CN201610969233.1A CN201610969233A CN106411100A CN 106411100 A CN106411100 A CN 106411100A CN 201610969233 A CN201610969233 A CN 201610969233A CN 106411100 A CN106411100 A CN 106411100A
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- China
- Prior art keywords
- speed rotor
- permanent magnet
- excitation ring
- excitation
- static excitation
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02K—DYNAMO-ELECTRIC MACHINES
- H02K49/00—Dynamo-electric clutches; Dynamo-electric brakes
- H02K49/10—Dynamo-electric clutches; Dynamo-electric brakes of the permanent-magnet type
- H02K49/104—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element
- H02K49/106—Magnetic couplings consisting of only two coaxial rotary elements, i.e. the driving element and the driven element with a radial air gap
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Dynamo-Electric Clutches, Dynamo-Electric Brakes (AREA)
Abstract
The invention provides a coaxial magnetic gear with a static excitation ring. The coaxial magnetic gear comprises a low speed rotor, a static excitation ring and a high speed rotor coaxially arranged from outside to inside, and air gaps are among the low speed rotor, the static excitation ring and the high speed rotor. The inner edge of the lower speed rotor is annularly provided with a salient pole structure. The outer edge of the high speed rotor is annularly provided with a salient pole structure. The static excitation ring is a ring structure formed by the mutual separation between an iron core and a permanent magnet. The invention relates to the coaxial magnetic gear, the structural stability is good, and the mechanical reliability is high. The permanent magnet is on the static excitation ring and is not rotated with the rotor, the reliability of permanent magnet fixation and the stability of excitation are ensured, and the realization of other excitation modes such as electrical excitation or superconducting excitation is facilitated. Above all, the coaxial magnetic gear provided by the invention can obtain ideal mechanical reliability and operation stability, and high torque transmission capacity can be maintained at the same time.
Description
Technical field
The present invention relates to a kind of coaxial magnetic wheel gear with static excitation ring, belong to gear technical field.
Background technology
Magnetic gear carries out the transmission of torque using magnetic coupling effect, is a kind of Non-contact speed-changing actuating device, no
There is noise, vibrations, friction loss and lubrication, and the physical isolation between being capable of inputting and exporting, also
Possesses overload self-shield ability, security reliability is higher.In recent years, with the development of high-performance Ne-Fe-B permanent-magnet material, new
The research of magnetic gear topological structure is of increased attention.
Torque transfer capability and transmission stability are two important indicators evaluating magnetic gear performance, turn compared to tradition
Remodel magnetic gear, higher torque transfer capability is had based on the field modulation magnetic gear of magnetic field modulation principle work, is mesh
The study hotspot of front Non-contact speed-changing transmission field.Field modulation magnetic gear is typically by high speed rotor, low speed rotor and adjustable magnetic
Ring is constituted.
The permanent magnet that magnetic gear is modulated in traditional field is mounted on high, low speed rotor, when rotor is in high-speed rotation
State or be subject to when larger torque it may occur that the phenomenon that comes off of rotor permanent magnet, greatly reduces Mechanical Reliability.
A kind of coaxial magnetic gear disclosed in Chinese invention patent ZL201110252784.3 although move to quiet by the permanent magnet of low speed rotor
Form static magnet ring so that low speed rotor is only the salient-pole structure being made up of iron core on adjustable magnetic ring only, improve low speed rotor
Mechanical Reliability, but high speed rotor is still made up of iron core and Surface Mount permanent magnet, is susceptible to during high speed rotor high-speed rotation
The phenomenon that permanent magnet comes off, thus leading to gear failure, overall structure reliability is still relatively low.If additionally, rotor-exciting structure
Permanent magnet excitation is replaced using electrical excitation or superconduction excitation, needs using slip ring and brush, this will increase magnetic gear design
Complexity with making assembling, more can substantially reduce integrally-built reliability.According to static excitation, then can conveniently realize
Electrical excitation or superconduction excitation replace permanent magnet excitation, without increasing the complexity of structure.Therefore, reliable to having higher machinery
Property, the research of the magnetic gear topological structure of static excitation type have important theory significance and engineering practical value.
Content of the invention
For the deficiencies in the prior art, the present invention provides a kind of coaxial magnetic wheel gear with static excitation ring.
The present invention can solve the problem that the high, low speed rotor Mechanical Reliability that existing field modulation magnetic gear exists is low, runs steady
Qualitative difference, rotor-exciting is not easy to the problem using electrical excitation or superconduction excitation.
Technical scheme is as follows：
A kind of coaxial magnetic wheel gear with static excitation ring, including the low speed rotor being coaxially disposed from outside to inside, static
Excitation ring and high speed rotor, and it is provided with air gap each other；The inner edge annular of described low speed rotor is provided with salient-pole structure；Described
The peripheral annual of high speed rotor is provided with salient-pole structure；Described static excitation ring is the ring that iron core and permanent magnet are spaced composition
Shape structure.In the present invention, described high speed rotor, low speed rotor are all by being made up of single soft magnetic materials, and there is not permanent magnet.Its
In, described soft magnetic materials refers to occur to be not more than the material of 1000A/m in Hc when magnetization, and typical soft magnetic materials can be with
Little external magnetic field realizes the maximum intensity of magnetization.Soft magnetic materials is easy to magnetize, and is also easy to demagnetize, is widely used in electrical equipment and electricity
In sub- equipment.
According to currently preferred, the permanent magnet of described static excitation ring along the circumference cutting orientation magnetizing of described loop configuration,
And the magnetizing direction of adjacent permanent magnet is contrary.This technical scheme forms effective N-S magnetic pole,
There is provided excitation for whole magnetic gear.
According to currently preferred, in the salient-pole structure of described low speed rotor, salient pole number is N1, described static excitation ring
The number of pole-pairs of middle permanent magnet is Ps, high speed rotor salient-pole structure in salient pole number be NhMeet following relation：
N1-Ps=Nh+Ps；
Variator drive ratio G realizedrFor：Gr=N1:Nh.
Beneficial effects of the present invention are as follows：
1., in the coaxial magnetic wheel gear of the present invention, high, low speed rotor is all the annular salient pole being made up of single soft magnetic materials
, there is not permanent magnet in structure, structural stability good thereon, and Mechanical Reliability is high；
2. in the coaxial magnetic wheel gear of the present invention, permanent magnet is located on static excitation ring, need not rotate with rotor, effectively protects
Demonstrate,prove the stability of the fixing fixing of permanent magnet and excitation, be easy to replace permanent magnet excitation using other excitation modes, such as simultaneously
Electrical excitation or superconduction excitation etc..The present invention is obtained in that preferable Mechanical Reliability and operation stability.
Brief description
Fig. 1 is the coaxial magnetic wheel gear cross section structure figure of the present invention；
In Fig. 1：1st, low speed rotor；11st, the iron core ring of low speed rotor；12nd, the salient pole of low speed rotor；2nd, static excitation ring；
21st, the iron core of static excitation ring；22nd, the permanent magnet of static excitation ring；3rd, high speed rotor；31st, the iron core ring of high speed rotor；32、
The salient pole of high speed rotor；4th, the air gap between low speed rotor and static excitation ring；5th, between high speed rotor and static excitation ring
Air gap.In figure arrow represents the magnetizing direction of permanent magnet.
Specific embodiment
With reference to embodiment and Figure of description, the present invention is described in detail, but not limited to this.Described below
Embodiment be only a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment in the present invention, ability
The every other embodiment that domain those of ordinary skill is obtained under the premise of not making creative work, broadly falls into the present invention and protects
The scope of shield.
Embodiment,
A kind of coaxial magnetic wheel gear with static excitation ring, including the low speed rotor 1 being coaxially disposed from outside to inside, static
Excitation ring 2 and high speed rotor 3, and it is provided with air gap each other；The inner edge annular of described low speed rotor 1 is provided with salient-pole structure
12；The peripheral annual of described high speed rotor 3 is provided with salient-pole structure 32；Described static excitation ring 2 is iron core 21 and permanent magnet 22
It is spaced the loop configuration of composition.
The permanent magnet 22 of described static excitation ring 2 is along the circumference cutting orientation magnetizing of described loop configuration, and adjacent permanent magnet 22
Magnetizing direction contrary.This technical scheme forms effective N-S magnetic pole, provides excitation for whole magnetic gear.
In the salient-pole structure 12 of described low speed rotor 1, salient pole number is Nl, in described static excitation ring 2 permanent magnet 22 pole
Logarithm is Ps, high speed rotor salient-pole structure 32 in salient pole number be NhMeet following relation：
N1-Ps=Nh+Ps；
Variator drive ratio G realizedrFor：Gr=N1:Nh.
Described low speed rotor axial length is L1, described static excitation ring axial length be Ls, high speed rotor axial direction length be
LhBetween meet following relation：
L1=Ls=Lh.
1 the present invention will be further described below in conjunction with the accompanying drawings.
Low speed rotor 1 of the present invention and high speed rotor 3 are all the annular salient-pole structure being made up of single soft magnetic materials,
There is not permanent magnet thereon, structural stability is good, Mechanical Reliability is high.
The present invention provides the permanent magnet of excitation, and that is, the permanent magnet 22 of static excitation ring is located on static excitation ring 2, need not be with
Rotor rotates, and the stability of permanent magnet fixing fixing and excitation has been effectively ensured, and is easy to using other excitation modes simultaneously
Replacing permanent magnet excitation, such as electrical excitation or superconduction excitation etc., as long as guaranteeing to produce effective N-S magnetic pole, but no matter adopting
Used which kind of version, all within protection scope of the present invention.
Described low speed rotor 1, static excitation ring 2 and high speed rotor 3 from outside to inside, concentric arrangement and axial length phase
With.
It is provided with air gap 4, static excitation ring 2 and high speed rotor between described static excitation ring 2 and the inner surface of low speed rotor 1
It is provided with air gap 5 such that it is able to ensure that high, low speed rotor normally rotates between 3 outer surface.
Described low speed rotor 1, the iron core 21 of static excitation ring, high speed rotor 3 are by silicon steel laminations or other soft magnetic materials structures
Become, identical with the stator-rotor iron core manufacturing process of common permagnetic synchronous motor.
The permanent magnet 22 of described static excitation ring is made up of rare-earth Nd-Fe-B or other permanent magnet material, circumferentially tangentially fills
Magnetic, and adjacent permanent magnet magnetizing direction is contrary, forms effective N-S magnetic pole, provides excitation for whole device.
The magnetic field modulation function of the salient pole 12 (salient pole 32 of high speed rotor) of low speed rotor, can by static excitation ring forever
The magnetic field that magnet 22 produces produces a series of space harmonics magnetic fields in air gap 4 (air gap 5) internal modulation, when depositing in air gap 4 with air gap 5
In the equal harmonic field of number of pole-pairs, acted on by magnetic coupling, this coaxial magnetic wheel gear can be realized as stable torque
Transmission.In order to realize gear effect must be requested that carried coaxial magnetic wheel gear high, low speed rotor with salient pole number not
Identical.Now, when the number of salient pole 12 of low speed rotor is equal at a high speed with the difference of the number of pole-pairs of the permanent magnet 22 of static excitation ring
The harmonic wave of amplitude maximum during the number of pole-pairs sum of the number of salient pole 32 of rotor and the permanent magnet 22 of static excitation ring, can be utilized
Optimum torque transfer capability is realized in magnetic field.I.e. number N of the salient pole 12 of coaxial magnetic wheel gear low speed rotor of the present invention1、
Number of pole-pairs P of the permanent magnet 22 of static excitation rings, high speed rotor salient pole 32 number NhFollowing relation should be met：
N1-Ps=Nh+Ps(1)
Now, accordingly, variator drive ratio G that this coaxial magnetic wheel gear is capable ofrFor：
Gr=N1:Nh(2)
Salient pole 12 number of the coaxial magnetic wheel gear low speed rotor that Fig. 1 example is given is 25, the permanent magnet of static excitation ring
22 number of pole-pairs is 9, and salient pole 32 number of high speed rotor is 7, fully meets above-mentioned expression formula (1), now this coaxial magnetic tooth
Taking turns the variator drive ratio being capable of is 25:7.
In coaxial magnetic wheel gear according to the present invention, high, low speed rotor is all the convex annular being made up of single soft magnetic materials
, there is not permanent magnet in pole structure, structural stability good thereon, and Mechanical Reliability is high.Permanent magnet is located on static excitation ring, need not
With rotor rotation, the stability of permanent magnet fixing fixing and excitation is effectively ensured, has been easy to other excitation modes simultaneously
Realize, such as electrical excitation or superconduction excitation etc..In sum, the carried coaxial magnetic wheel gear of the present invention is obtained in that preferably machinery can
By property and operation stability, higher torque transfer capability can be kept simultaneously again.
Claims (3)
1. a kind of coaxial magnetic wheel gear with static excitation ring is it is characterised in that described coaxial magnetic wheel gear is included by outward extremely
Low speed rotor, static excitation ring and the high speed rotor being inside coaxially disposed, and it is provided with air gap each other；Described low speed rotor interior
Edge annular is provided with salient-pole structure；The peripheral annual of described high speed rotor is provided with salient-pole structure；Described static excitation ring is ferrum
Core and permanent magnet are spaced the loop configuration of composition.
2. a kind of coaxial magnetic wheel gear with static excitation ring according to claim 1 is it is characterised in that described static
The permanent magnet of excitation ring is along the circumference cutting orientation magnetizing of described loop configuration, and the magnetizing direction of adjacent permanent magnet is contrary.
3. a kind of coaxial magnetic wheel gear with static excitation ring according to claim 1 is it is characterised in that described low speed
In the salient-pole structure of rotor, salient pole number is N1, the number of pole-pairs of permanent magnet is P in described static excitation rings, the salient pole of high speed rotor
In structure, salient pole number is NhMeet following relation：
N1-Ps=Nh+Ps；
Variator drive ratio G realizedrFor：Gr=N1:Nh.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610969233.1A CN106411100B (en) | 2016-10-28 | 2016-10-28 | A kind of coaxial magnetic wheel gear with static excitation ring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610969233.1A CN106411100B (en) | 2016-10-28 | 2016-10-28 | A kind of coaxial magnetic wheel gear with static excitation ring |
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| Publication Number | Publication Date |
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| CN106411100A true CN106411100A (en) | 2017-02-15 |
| CN106411100B CN106411100B (en) | 2019-05-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610969233.1A Active CN106411100B (en) | 2016-10-28 | 2016-10-28 | A kind of coaxial magnetic wheel gear with static excitation ring |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109525094A (en) * | 2018-12-24 | 2019-03-26 | 上海鑫国动力科技有限公司 | A kind of step-by-step movement magnetic gear |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100147619A1 (en) * | 2008-12-12 | 2010-06-17 | Delphi Technologies Inc. | Methods and systems involving electromagnetic torsion bars |
| CN102324821A (en) * | 2011-08-30 | 2012-01-18 | 东南大学 | Coaxial magnetic gear |
| CN103997174A (en) * | 2014-06-11 | 2014-08-20 | 东南大学 | Rotor salient pole type hybrid excitation motor based on magnetic gear |
-
2016
- 2016-10-28 CN CN201610969233.1A patent/CN106411100B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100147619A1 (en) * | 2008-12-12 | 2010-06-17 | Delphi Technologies Inc. | Methods and systems involving electromagnetic torsion bars |
| CN102324821A (en) * | 2011-08-30 | 2012-01-18 | 东南大学 | Coaxial magnetic gear |
| CN103997174A (en) * | 2014-06-11 | 2014-08-20 | 东南大学 | Rotor salient pole type hybrid excitation motor based on magnetic gear |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109525094A (en) * | 2018-12-24 | 2019-03-26 | 上海鑫国动力科技有限公司 | A kind of step-by-step movement magnetic gear |
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| CN106411100B (en) | 2019-05-10 |
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