CN109889016A - A high torque density magnetic gear with non-uniform air gap - Google Patents
A high torque density magnetic gear with non-uniform air gap Download PDFInfo
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- CN109889016A CN109889016A CN201910181904.1A CN201910181904A CN109889016A CN 109889016 A CN109889016 A CN 109889016A CN 201910181904 A CN201910181904 A CN 201910181904A CN 109889016 A CN109889016 A CN 109889016A
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- permanent magnet
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Abstract
一种非均匀气隙的高转矩密度磁力齿轮，由内至外依次包括内转子、调磁环及外转子，所述调磁环与内转子及外转子之间均设有气隙，所述内转子包括内轭铁和内转子永磁体，所述内转子永磁体的外侧边缘为波浪形结构。本发明提供一种非均匀气隙的高转矩密度磁力齿轮，其目的在于通过改进永磁体的结构与充磁方式，实现增加转矩密度、降低转矩脉动，提高永磁体利用率。
A high-torque-density magnetic gear with non-uniform air gap includes an inner rotor, a magnetic adjustment ring and an outer rotor in sequence from inside to outside, and an air gap is arranged between the magnetic adjustment ring, the inner rotor and the outer rotor, so The inner rotor includes an inner yoke and an inner rotor permanent magnet, and the outer edge of the inner rotor permanent magnet is a wave-shaped structure. The present invention provides a non-uniform air gap high torque density magnetic gear, the purpose of which is to increase the torque density, reduce the torque ripple and improve the utilization rate of the permanent magnet by improving the structure and magnetization method of the permanent magnet.
Description
Technical field
The invention belongs to technical field of magnetic transmission, more particularly, to a kind of high torque density magnetic of non-homogeneous air gap
Powershift gear.
Background technique
Just there is scholar to propose the concept of magnetic-gear early in early 20th century and has applied for patent.Early stage magnetic-gear knot
Structure is similar to mechanical gear, and since topological structure is single, permanent magnet utilization rate is low to cause torque density far away from mechanical gear,
Therefore magnetic-gear does not receive too many concern.At the beginning of 21 century, K Atallah, D professor Howe proposes magnetic field modulation
Formula magnetic-gear, the model inner and outer Rotator number of pole-pairs are respectively 4 pairs of poles and 22 pairs of poles, and transmission ratio 5.5:1 is surveyed by test
The torque density for obtaining the model machine is 100kNm/m3, considerably beyond conventional magnetic gear, all permanent magnets in transmission process
Torque transfer is both participated in, torque density is high and permanent magnet utilization rate is high；Compared with tradition machinery gear, there is contactless, low noise
Sound is not necessarily to the advantages such as lubrication and automatic overload protection.
As the research of magnetic field modulation type magnetic-gear deepens continuously, the magnetic-gear of various different structures is studied in succession
Out, linear, magneticfocusing and axial type magnetic-gear are come out one after another.But there is also some defects, as torque ripple is big,
Permanent magnet dosage is big, torque density needs to be further increased.The high torque density magnetic-gear external rotor permanent magnet of non-homogeneous air gap
Body is that the simplified eccentric sine of Halbach array internal rotor segmentation magnetizes, and it is driven in transmission process can to reduce magnetic-gear
The fluctuation of speed of gear increases output torque density.
Summary of the invention
Technical problem to be solved by the invention is to provide a kind of high torque density magnetic-gear of non-homogeneous air gap, mesh
The structure being by improving permanent magnet and magnetize mode, realize and increase torque density, reduce torque pulsation, improve permanent magnetism
Body utilization rate.
In order to solve the above technical problems, the technical scheme adopted by the invention is that: a kind of high torque (HT) of non-homogeneous air gap is close
Magnetic-gear is spent, from the inside to the outside successively includes internal rotor, adjustable magnetic ring and outer rotor, the adjustable magnetic ring and internal rotor and outer rotor
Between be equipped with air gap, the internal rotor includes interior yoke and internal rotor permanent-magnetic body, the outer ledge of the internal rotor permanent-magnetic body
For wavy shaped configuration.
Preferably, the internal rotor permanent-magnetic body includes 8 internal magnetic poles, and 8 internal magnetic poles constitute an annular, form 4 pairs
Pole, each internal magnetic pole include intermediate permanent magnet, left permanent magnet and right permanent magnet.
Preferably, the adjustable magnetic ring includes the adjustable magnetic iron block and non-magnet material being staggered.
Preferably, the outer rotor includes outer rotor permanent magnet and outer yoke.
Preferably, the outer yoke is formed by multiple silicon steel plate stackings.
Preferably, the intermediate permanent magnet uses radial magnetizing, and the left permanent magnet and right permanent magnet respectively centre are forever
The radial clockwise angle [alpha] and-α of magnet.
Preferably, intermediate permanent magnet staggeredly uses and radially-inwardly magnetizes and radially outward magnetize.
Preferably, a kind of high torque density magnetic-gear of non-homogeneous air gap, feature exist according to claim 4
In: the outer rotor permanent magnet uses Halbach array.
Preferably, the outer rotor permanent magnet includes 17 to pole, includes each 4 permanent magnets, 4 permanent magnets to pole
Magnetizing direction successively rotated clockwise by 90 °.
Preferably, the internal rotor, adjustable magnetic ring and outer rotor are free to rotate.
The present invention provides a kind of high torque density magnetic-gear of non-homogeneous air gap, and being compared with the prior art can obtain down
Column the utility model has the advantages that
(1) the magnetic field modulation type magnetic-gear of the high torque density of non-homogeneous air gap provided by the invention, compared to existing
Magnetic field modulation type magnetic-gear structure, outer rotor permanent magnet structure of the present invention is Halbach array, and it is mixed that Halbach is utilized
The few advantage of polarizing magnetic field harmonic content is closed, realizes higher torque density in the case where low torque fluctuation；
(2) the magnetic field modulation type magnetic-gear of the high torque density of non-homogeneous air gap provided by the invention, internal rotor is forever
Magnet structure is uneven segmentation, and such structure integrally reduces internal rotor permanent-magnetic body dosage, to reach reduction magnetic-gear
Cost purpose.Compared to existing magnetic field modulation type magnetic-gear structure, type of the present invention improves permanent magnetism to a certain extent
The utilization rate of body, and have better economy.
(3) the magnetic field modulation type magnetic-gear of the high torque density of non-homogeneous air gap provided by the invention, outer rotor output
Torque is bigger and internal rotor torque pulsation is substantially reduced.Compared to existing magnetic-gear, the transmission stability of type of the present invention is more
It is high.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples:
Fig. 1 is the structural diagram of the present invention；
Fig. 2 is the structural schematic diagram of internal rotor permanent-magnetic body of the present invention；
Fig. 3 is the structural schematic diagram of outer rotor permanent magnet of the present invention；
Fig. 4 is the structural schematic diagram of internal magnetic pole of the present invention.
Specific embodiment
As in Fig. 1-3, a kind of high torque density magnetic-gear of non-homogeneous air gap, successively include from the inside to the outside internal rotor,
Adjustable magnetic ring and outer rotor, are equipped with air gap between the adjustable magnetic ring and internal rotor and outer rotor, the internal rotor includes interior yoke
1 and internal rotor permanent-magnetic body 2, the outer ledge of the internal rotor permanent-magnetic body 2 is wavy shaped configuration.Permanent magnet is unevenly segmented knot
Structure, which reduces permanent magnet dosage, reduces manufacturing cost.
Preferably, the internal rotor permanent-magnetic body 2 includes that 8 internal magnetic poles 2-4,8 internal magnetic pole 2-4 constitute an annular, shape
At 4 pairs of poles, each internal magnetic pole 2-4 includes intermediate permanent magnet 2-1, left permanent magnet 2-2 and right permanent magnet 2-3.
Preferably, the adjustable magnetic ring includes the adjustable magnetic iron block 3 and non-magnet material 4 being staggered.By adjustable magnetic block in structure
It is formed with internal connecting bridge, plays the modulating action to inner and outer Rotator magnetic field number of pole-pairs.
Preferably, the outer rotor includes outer rotor permanent magnet 5 and outer yoke 6.
Preferably, the outer yoke 6 is formed by multiple silicon steel plate stackings.
Preferably, the intermediate permanent magnet 2-1 uses radial magnetizing, and the left permanent magnet 2-2 and right permanent magnet 2-3 divide
Not Wei intermediate permanent magnet 2-1 radial clockwise angle [alpha] and-α.
Preferably, intermediate permanent magnet 2-1 is staggeredly used and is radially-inwardly magnetized and radially outward magnetize.
Preferably, a kind of high torque density magnetic-gear of non-homogeneous air gap, feature exist according to claim 4
In: the outer rotor permanent magnet 5 uses Halbach array.
Preferably, the outer rotor permanent magnet 5 includes 17 to pole 5-1, includes each 4 permanent magnet 5-2 to pole 5-1,
The magnetizing direction of 4 permanent magnet 5-2 successively rotates clockwise by 90 °.
Preferably, the internal rotor, adjustable magnetic ring and outer rotor are free to rotate.
Its internal rotor permanent-magnetic body is to be segmented that eccentric sine magnetizes and outer rotor permanent magnet is that Halbach array magnetizes, and is constituted
Halbach- permanent magnet is unevenly segmented the magnetic-gear of composite construction；Wherein, uneven segmentation is magnetized using sine,
Halbach array, which magnetizes, to be referred to by radially and tangentially alternately the mixing that forms is magnetized structure.
Halbach array has good sinusoidal air gap flux density distribution and self-shileding magnetization characteristic, can be specific
More powerful magnetic field is established in side space, and FEM Numerical Simulation also demonstrates this effect；So that the work at air gap
Flux density amplitude increases, to increase transmitting torque.
Above-mentioned magnetic-field modulation-type magnetic-gear, outer rotor, internal rotor, in adjustable magnetic ring three, in any fixed three
One, other two are rotated, may be constructed different rotation modes.
1) permanent-magnetic outer rotor is fixed, permanent magnetism internal rotor is as torque input shaft, modulation rotor as torque output shaft；
The high speed low torque of permanent magnetism internal rotor input turns after the magnetic field modulation type magnetic-gear in modulation rotor output low speed height
Square realizes input and exports equidirectional deceleration transmission.
2) permanent-magnetic outer rotor is fixed, modulation rotor is as torque input shaft, using permanent magnetism internal rotor as torque output
Axis realizes input and exports equidirectional step-up drive.
3) fixed modulation rotor regard external stator rotation as torque output using permanent magnet internal rotor as torque input shaft
Axis realizes the deceleration transmission of input with output opposite direction.
4) using permanent magnetism external stator as torque input shaft, permanent magnetism internal rotor realizes input and output as torque output shaft
Opposite direction step-up drive.
The present invention sets internal rotor number of pole-pairs as 4, and outer rotor number of pole-pairs is 17, and adjustable magnetic ring iron core number is 21.Table 1 provides
Magnetic-gear model parameter.
1 magnetic-gear major parameter of table
As shown in figure 4, internal rotor of the present invention is to be segmented eccentric magnet structure, AB sections are O with the DE sections of centers of circle1Eccentricity is
|OO1|, the BCD sections of centers of circle are O2Eccentricity is | OO2|.The thickness of interior permanent magnet is different and different with internal rotor position, therefore
Internal layer gas length also becomes uneven.
In the present embodiment, internal rotor include by silicon steel sheet stack at internal rotor iron core and surface-mount type internal rotor permanent-magnetic body；It is interior
Permanent magnet is 4 pairs of poles, and 3 pieces are a pair of of pole for 6 pieces of a pole, and each extremely intermediate bulk permanent magnet is all made of radial magnetizing, left and right
Both sides fritter permanent magnet magnetizing direction is respectively the radial clockwise angle [alpha] and-α with intermediate bulk permanent magnet.It is more existing
Permanent magnet dosage is less in the magnetic field modulation type magnetic-gear present invention, plays the role of reducing cost of manufacture, reaches permanent magnet more
The purpose of big utilization rate.
Outer rotor permanent magnet (5) is surface-mount type Halbach array, and external stator iron core 6 is formed by silicon steel plate stacking；Wherein
Outer rotor permanent magnet is 17 pairs of poles, it is every a pair of pole divide equally 4 pieces it is circumferentially circumferentially distributed, each fritter permanent magnet magnetizing direction is pressed
90 ° successively rotate clockwise.
Outer rotor permanent magnet number of pole-pairs is Pl, internal rotor permanent-magnetic body number of pole-pairs is Pm, adjustable magnetic iron block number is Ns, meet with
Lower relationship:
Ns=Pl+Pm (1)
Outer rotor, adjustable magnetic ring, internal rotor three may be configured as rotating freely, internal rotor number of pole-pairs PmWith revolving speed Ωm, outside
Rotor number of pole-pairs PlWith revolving speed Ωl, adjustable magnetic ring iron block number NsWith revolving speed ΩsMeet lower formula:
NsΩs=PlΩl+PmΩm (2)
In the present embodiment, which is applied to the equidirectional step-up drive field of input and output,
, using internal rotor as torque output shaft, it can realize that the equidirectional speedup of input and output passes using tune magnet ring as torque input shaft
Dynamic, it is 21/4=5.25 that speed increasing ratio, which is calculated, in same method.
In the present embodiment, which is applied to the equidirectional deceleration transmission field of input and output,
, using adjustable magnetic ring as torque output shaft, it can realize that the equidirectional deceleration speed of input and output passes using internal rotor as torque input shaft
Dynamic, it is 21/4=5.25 that reduction ratio, which is calculated, in same method.
In the present embodiment, which is applied to input and output opposite direction step-up drive field,
Input and output opposite direction step-up drive can be realized using internal rotor as torque output shaft using outer rotor as torque input shaft,
It is -17/4=-4.25 that speed increasing ratio, which is calculated, in same method, and negative sign indicates that output is opposite with the direction of rotation of output shaft.
In the present embodiment, which is applied to input and output opposite direction deceleration transmission field,
Input and output opposite direction deceleration transmission can be realized using outer rotor as torque output shaft using internal rotor as torque input shaft,
It is -17/4=-4.25 that reduction ratio, which is calculated, in same method, and negative sign indicates that output is opposite with the direction of rotation of output shaft.
Compared to more traditional surface-mount type magnetic-gear, in the case where same volume, internal rotor permanent-magnetic body dosage is reduced, and is reached
To the purpose for reducing manufacturing cost；And on the other hand, it does reversed deceleration transmission and be averaged output torque increase by 18.61% and torque
Fluctuation decline 30.1% does the average output torque that reversely drives up and increases by 18.71% and torque ripple decline 82.6%,
Magnetic-gear reliable transmission is improved to a certain extent.
As it will be easily appreciated by one skilled in the art that the foregoing is merely illustrative of the preferred embodiments of the present invention, not to
The limitation present invention, any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should all wrap
Containing within protection scope of the present invention.
The above embodiments are only the preferred technical solution of the present invention, and are not construed as limitation of the invention, this hair
Bright protection scope should be with the technical solution of claim record, technical characteristic in the technical solution recorded including claim
Equivalents be protection scope.Equivalent replacement i.e. within this range is improved, also protection scope of the present invention it
It is interior.
Claims (10)
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910181904.1A CN109889016A (en) | 2019-03-11 | 2019-03-11 | A high torque density magnetic gear with non-uniform air gap |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910181904.1A CN109889016A (en) | 2019-03-11 | 2019-03-11 | A high torque density magnetic gear with non-uniform air gap |
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| CN109889016A true CN109889016A (en) | 2019-06-14 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112615521A (en) * | 2020-11-30 | 2021-04-06 | 珠海格力电器股份有限公司 | Magnetic gear and composite motor with same |
| CN112615525A (en) * | 2020-11-30 | 2021-04-06 | 珠海格力电器股份有限公司 | Magnetic gear and composite motor with same |
| CN112636562A (en) * | 2020-11-30 | 2021-04-09 | 珠海格力电器股份有限公司 | Magnetic gear and composite motor with same |
| CN112821618A (en) * | 2021-03-05 | 2021-05-18 | 包头长安永磁电机有限公司 | Segmented eccentric integrated magnetic pole structure of hub motor |
| CN113949223A (en) * | 2021-03-11 | 2022-01-18 | 国家电投集团科学技术研究院有限公司 | Permanent magnet gear speed change device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112615521A (en) * | 2020-11-30 | 2021-04-06 | 珠海格力电器股份有限公司 | Magnetic gear and composite motor with same |
| CN112615525A (en) * | 2020-11-30 | 2021-04-06 | 珠海格力电器股份有限公司 | Magnetic gear and composite motor with same |
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| CN113949223A (en) * | 2021-03-11 | 2022-01-18 | 国家电投集团科学技术研究院有限公司 | Permanent magnet gear speed change device |
| CN113949223B (en) * | 2021-03-11 | 2023-07-14 | 国家电投集团科学技术研究院有限公司 | Permanent magnet gear speed changing device |
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