CN104953779A - Low-speed and high-torque motor with magnetic gear - Google Patents
Low-speed and high-torque motor with magnetic gear Download PDFInfo
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- CN104953779A CN104953779A CN201510334331.3A CN201510334331A CN104953779A CN 104953779 A CN104953779 A CN 104953779A CN 201510334331 A CN201510334331 A CN 201510334331A CN 104953779 A CN104953779 A CN 104953779A
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- permanent magnet
- magnetic
- torque motor
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Abstract
The invention provides a low-speed and high-torque motor with a magnetic gear. The low-speed and high-torque motor comprises an inner rotor, an adjustable magnetic ring and a stator which are coaxially and sequentially arranged from inside to outside, wherein a permanent magnet is arranged in the inner rotor; an armature winding for generating a rotating magnetic field and an electromagnet for generating a constant magnetic field are arranged in the stator. By adopting the electromagnet to generate the constant magnetic field in the stator and to replace a permanent magnet in the stator, the usage of the permanent magnet can be reduced, so that the length of an air gap on an outer layer is reduced, and further the coupling degree of an armature winding magnetic field and a permanent magnet magnetic field of the inner rotor is improved.
Description
Technical field
The present invention relates to power transmission device field, be specifically related to a kind of magnetic gear low speed high torque motor.
Background technology
Directly drive low speed high torque motor and have very large demand in many occasions, as the technical field such as wind power generation, Ship Propeling.In traditional power-equipment, the normal high-speed electric expreess locomotive that adopts drives multiple reduction gear box to realize.Reduction gear box generally adopts mechanical gearbox, relies between cog engagement transmitting torque.It is a kind of transfer mode of contact, and its work often needs the environment of an oil lubrication, and after overload, gear easily ruptures, and therefore needs periodic maintenance of sending someone.In addition, reduction gear casing sum weight ratio used is comparatively large, supports the use with high-speed electric expreess locomotive, and both take up room larger together, and weight also can be heavier.
After magnetic gear occurs, magnetic gear and magneto integrate by people, propose integrated magnetic gear low speed high torque motor, instead of conventional high rate motor and connect gear box, reduce the volume and weight of whole system, thus improve the efficiency of system.What illustrate is; magnetic gear is a kind of contactless torque transmitter; with mechanical gear unlike; it relies between magnetic field and realizes speed change transmitting torque without contacting with each other; its advantage is without the need to lubricating oil intermittent oiling; and there is automatic overload protection ability; the more important thing is that magnetic gear can integrate with magneto; become a part for motor; eliminate the problems that gear box brings; improve the efficiency of whole system and eliminate the maintenance cost of some aspect of staff, having saved cost.
In the prior art, one of important composition composition in magnetic gear low speed high torque motor magnetic gear is all permanent magnet excitation, namely installs permanent magnet in the stator, so, will inevitably use a large amount of permanent magnets on the one hand, add the cost of motor; On the other hand, according to the operation principle of magnetic gear low speed high torque motor, the magnetic field that armature winding produces and internal rotor permanent-magnetic body magnetic field interaction, drive internal rotor rotates, then drive the adjustable magnetic ring of magnetic gear to rotate, therefore, the permanent magnet in stator will inevitably increase outer gas length, reduce armature group magnetic field and internal rotor permanent-magnetic magnetic Field Coupling degree, reduce compound machine torque output capability.
Summary of the invention
For this reason, technical problems to be solved in this application are how to reduce the consumption of permanent magnet, improve armature group magnetic field and internal rotor permanent-magnetic magnetic Field Coupling degree, thus a kind of magnetic gear low speed high torque motor is provided, to provide new departure of a kind of compound machine, to improve armature group magnetic field and internal rotor permanent-magnetic magnetic Field Coupling degree
According to first aspect, a kind of magnetic gear low speed high torque motor is provided in a kind of embodiment, comprises:
Coaxial internal rotor, adjustable magnetic ring and the stator arranged successively, wherein, is provided with permanent magnet in internal rotor from the inside to the outside, is provided with the armature winding producing rotating magnetic field and the electromagnet producing stationary magnetic field in stator.
According to the magnetic gear low speed high torque motor of above-described embodiment, owing to adopting the stationary magnetic field in electromagnet generation stator, owing to adopting the permanent magnet in electromagnet replacement stator, the consumption of permanent magnet can be reduced, thus reduce outer gas length, then improve armature group magnetic field and internal rotor permanent-magnetic magnetic Field Coupling degree.
The permanent magnet replacing in stator adopting DC coil, can the magnetic field of stable output, and the size of electric current has adjustability, therefore, the size of stationary magnetic field can be made to have adjustability, then the Driving Torque of adjustable motor.
Under each stator tooth, be also respectively arranged with the second permanent magnet, the second permanent magnet magnetizing direction under each tooth is consistent with the magnetic direction of DC coil on this stator tooth, and under adjacent two teeth, permanent magnet forms a pair pole.Adopt DC coil and permanent magnet composite excitation, by regulating galvanic size, can flexible air-gap field size, thus regulate the output of torque; By changing sense of current adjusting size simultaneously, the magnetic field of the second permanent magnet can be reduced, thus widen the speed adjustable range of motor.
Accompanying drawing explanation
Fig. 1 a is a kind of magnetic gear low speed high torque motor planing surface structural representation disclosed in the present embodiment;
Fig. 1 b is a kind of magnetic gear low speed high torque motor plane structure chart disclosed in the present embodiment;
Fig. 2 is the three-dimensional exploded perspective view of the present embodiment magnetic gear low speed high torque motor;
Fig. 3 a is a kind of radial section schematic diagram of the present embodiment motor;
Fig. 3 b is the another kind of radial section schematic diagram of the present embodiment motor;
Fig. 4 is the star-like schematic diagram of the present embodiment groove electromotive force;
Fig. 5 a, 5b and 5c are a kind of example being connected three-phase alternating current coil mode of the present embodiment.
Embodiment
By reference to the accompanying drawings the present invention is described in further detail below by embodiment.
In present specification, when being not specifically noted, the noun of locality such as " upper and lower " of use typically refers to reference to shown in the drawings upper and lower; " inside and outside " refers to profile inside and outside relative to each parts itself.
Please refer to Fig. 1 a and Fig. 1 b, a kind of magnetic gear low speed high torque motor planing surface structural representation and planar structure schematic diagram disclosed in the present embodiment, magnetic gear low speed high torque motor comprises: coaxial internal rotor 3, adjustable magnetic ring 2 and the stator 1 arranged successively from the inside to the outside.Wherein, permanent magnet is provided with in internal rotor 3; Be provided with the armature winding 5 producing rotating magnetic field in stator 1, be also provided with the electromagnet 4 producing stationary magnetic field in stator 1, in the present embodiment, electromagnet 4 is DC coil.
In a particular embodiment, internal rotor 3, adjustable magnetic ring 2 and stator 1 can be arranged in the housing, particularly, first stationary support parts 11 and/or the second stationary support parts 12 are connected to form cavity with housing 10, internal rotor 3, adjustable magnetic ring 2 and stator 1 are arranged in this cavity, please refer to Fig. 2, is the three-dimensional exploded perspective view of the present embodiment magnetic gear low speed high torque motor, and hereafter composition graphs 1a, Fig. 1 b and Fig. 2 is described magnetic gear low speed high torque motor disclosed in the present embodiment.
Stator 1 is fixed on the inner side of housing 10, and stator 1 can adopt existing material to prepare, and such as, is formed by multilayer silicon steel plate stacking.In a particular embodiment, stator 1 offers multiple armature slot, to form multiple stator tooth, in the present embodiment, do not limit the concrete number of stator tooth, the concrete number of stator tooth should be preferably even number, such as 2N, wherein, N is positive integer, that is the number of armature slot is preferably 2N.Please refer to Fig. 3 a and Fig. 3 b, be the radial section schematic diagram of the present embodiment motor, the shape of stator tooth can be pyriform, and as shown in Figure 3 a, its design parameter can be determined according to the design manual of motor; Also can be rectangle, as shown in Figure 3 b; Certainly, can also be trapezoidal in other embodiments.
Armature winding 5 is connected and composed by the three-phase alternating current coil be wound on each stator tooth.In a particular embodiment, armature winding 5 can be connected and composed by the three-phase alternating current coil be wound in armature slot, particularly, existing mode can be adopted to realize, do not repeat them here.It should be noted that in a particular embodiment, usually have 2N AC coil.
Constant electromagnetic body 4 is realized by DC coil, in a particular embodiment, by DC coil coiling on the stator teeth, particularly, each stator tooth all can be wound with DC coil, so the pitch of DC coil is 1; And the DC coil reversal connection successively that position is adjacent, thus the polarity of the magnetic field inequality that after making to pass into direct current, adjacent two DC coils produce, namely forms the magnetic pole that a pair polarity is different, and the number of pole-pairs that 2N DC coil is formed is P
s=N.
In a particular embodiment, adjustable magnetic ring 2 can be made up of the multiple adjustable magnetic iron core blocks be circular layout by prepsetting gap, and wherein, the number of magnet pellet is N
sindividual, N
sfor positive integer; Gap between magnet pellet can rule of thumb be arranged, such as, in a kind of embodiment, and can apart from waiting point layout between magnet pellet; Magnet pellet can be formed by multilayer silicon steel plate stacking.In a particular embodiment, each adjustable magnetic iron core block can be fixed by the first rotary supporting part 6 and the second rotary supporting part 7, and rotates with the first rotating shaft 8, and its rotating speed might as well be set as ω
1.In other embodiments, the first rotary supporting part 6 and all right integrated design of the second rotary supporting part 7, as long as each magnet pellet that can realize adjustable magnetic ring 2 rotates with the first rotating shaft 8.
Internal rotor 3 comprises multiple first permanent magnets 31 arranged outside internal rotor iron core 32 and ring internal rotor iron core 32, and the number of the first permanent magnet 31 might as well be set as 2N
iindividual, wherein, N
ifor positive integer.Each first permanent magnet 31 is fixed on internal rotor iron core 32.Each first permanent magnet 31 is along internal rotor iron core 32 radial magnetizing, or parallel magnetization, and the magnetizing direction of adjacent the first permanent magnet 31 in position is contrary, so 2N
ithe number of pole-pairs that individual first permanent magnet 31 is formed is N
i.First permanent magnet 31 and internal rotor iron core 32 are fixed in the second rotating shaft 9, rotate with the second rotating shaft 9, and its rotating speed might as well be set as ω
2.
It should be noted that, in above-described embodiment, when layout first rotating shaft 8, second rotating shaft 9 and stator 1, coaxial constraint should be met.In the present embodiment, please refer to Fig. 1 a, Fig. 1 b and Fig. 2, the first rotary supporting part 6 can be rigidly connected with the first rotating shaft 8, and then the first rotating shaft 8 is arranged in the first stationary support parts 11 by clutch shaft bearing 13, wherein, the first stationary support parts 11 are mechanically connected with housing 10; Second rotating shaft 9 can be connected in the second rotary supporting part 7 by the second bearing 14; Internal rotor 3 is positioned at the inner side of adjustable magnetic iron core block 2, and both common axis, internal rotor 3 is fixed in the second rotating shaft 9 by its internal rotor iron core 32, and the second rotating shaft 9 is arranged in the second stationary support parts 12 by the 3rd bearing 15.So far, complete internal rotor 3, adjustable magnetic ring 2 and stator 1 and the whole machine installation with housing 10, and achieve the first rotating shaft 8, second rotating shaft 9 and the coaxial setting of stator 1.It should be noted that, in other alternative embodiment, those skilled in the art are according to the operation principle of motor, can adjust accordingly above-mentioned mounting means or replace, will be understood that the thought not departing from technical scheme disclosed in the present embodiment and contain, i.e. the first rotating shaft 8, second rotating shaft 9 and stator 1 coaxial arrangement, such as default second bearing 14 or the 3rd bearing 15.
It should be noted that, magnetic gear low speed high torque motor disclosed in above-described embodiment, also should preferably meet following constraints, the number N of magnet pellet
sequal the number of pole-pairs P that DC coil is formed
sthe number of pole-pairs N formed with the first permanent magnet 31
isum, i.e. N
s=P
s+ N
i.Such as, the number 2N=36 of stator tooth, namely the number of DC coil is also 2N=36, so the number of pole-pairs that 2N DC coil is formed is P
s=N=18; The number of the first permanent magnet 31 is 2N
i=8, so, the number of pole-pairs N that the first permanent magnet 31 is formed
i=4; Therefore, the number N of magnet pellet
s=P
s+ N
i=22.It should be noted that, above-mentioned concrete numerical value enumerates for ease of those skilled in the art understand, and can not assert that the technical scheme of these concrete numerical value to the present embodiment is construed as limiting.
Armature winding 5 can be determined according to the number of pole-pairs of internal rotor, so that AC coil is connected into three-phase symmetric winding.For ease of it will be appreciated by those skilled in the art that the example of the winding method that present embodiment discloses a kind of AC coil, it should be noted that, in other embodiments, can also adopt alternate manner that AC coil is connected into three-phase symmetric winding.In a kind of example, the number of the first permanent magnet 31 might as well be set as 2N
i=8, so, the internal rotor number of pole-pairs N that the first permanent magnet 31 is formed
i=4, and draw Fig. 3 a or the star-like figure of Fig. 3 b groove electromotive force, as shown in Figure 4, according to Fig. 4, a kind of connection layout of three-phase alternating current coil is as shown in Fig. 5 a, 5b and 5c, it should be noted that, in Fig. 4, Fig. 5 a, 5b and 5c, digital s1-s36 represents armature slot sequence number, and C1 ~ C36 represents the AC coil in armature slot.
Disclosed in the present embodiment, magnetic gear low speed high torque machine operation process is as follows: when passing into a certain size direct current to 2N (such as 36) DC coil 4, DC coil 4 forms N to pole (such as 18 to pole) transfixion magnetic field, namely constant magnetic field; Pass into the sinusoidal ac of certain amplitude and certain frequency then to three-phase alternating current coil 5, form rotating magnetic field, the permanent magnetic field effect that the rotating magnetic field formed and internal rotor first permanent magnet 31 produce, makes internal rotor 3 with ω
2rotating speed rotate.First permanent magnet 31 forms N
ithe permanent magnetic field rotated (such as 4 to) pole is through N
sthe modulating action of block (such as 22 pieces) adjustable magnetic iron core block, forms many magnetic field harmonics to pole in two-layer air gap inside and outside adjustable magnetic iron core block, and in like manner, DC coil forms N also can by N to pole (such as 18 to pole) actionless magnetic field
sblock (such as 22 pieces) adjustable magnetic iron core block is modulated, and inside and outside adjustable magnetic iron core block, form many magnetic field harmonics to pole in two-layer air gap, the magnetic field harmonics that these number of pole-pairs same rotational speed are identical acts on respectively in ectonexine air gap, drives adjustable magnetic iron core block with ω
1speed rotate, wherein ω
1: ω
2for speed no-load voltage ratio, equal N
icompare N
s, such as, equal 4 to 22.
Disclosed in the present embodiment, magnetic gear low speed high torque motor has the following advantages:
(1) adopt integrated magnetic gear low speed high torque motor, replace high-speed electric expreess locomotive and reduction box with the use of, realize the mode of low speed high torque, reduce the volume and weight of whole system.
(2) the stationary magnetic field size in stator, by passing into a certain size direct current to regulate to DC coil, thus, can control the size of Driving Torque; Reduce the consumption of permanent magnet simultaneously, saved cost, and outer gas length can be reduced, improve armature group magnetic field and internal rotor permanent-magnetic magnetic Field Coupling degree.
(3) eliminate the periodic maintenance work of some parts, such as avoid intermittent oiling, saved maintenance cost, improve the operational efficiency of system
In a preferred embodiment, please refer to Fig. 3 a and Fig. 3 b, magnetic gear low speed high torque motor disclosed in the present embodiment also comprises multiple second permanent magnet 16, and each second permanent magnet 16 is under correspondence arranges each stator tooth respectively.The magnetizing direction of the second permanent magnet 16 arranged under each stator tooth is consistent with the magnetic direction of DC coil on this stator tooth.In the present embodiment, the number of pole-pairs that DC coil is formed is equal with the number of pole-pairs that the second permanent magnet 16 is formed, it can thus be appreciated that the number of magnet pellet equals the number of pole-pairs sum that number of pole-pairs (or number of pole-pairs of the second permanent magnet 16) that DC coil forms is formed with the first permanent magnet 31.In the present embodiment, by permanent magnet and DC coil composite excitation, acting in conjunction participates in the transmission of torque, and its advantage is: 1) by regulating galvanic size, can flexible air-gap field size, thus regulates the output of torque; 2) by changing sense of current adjusting size simultaneously, the magnetic field of the second permanent magnet can be reduced, thus widen the speed adjustable range of motor.
More than applying specific case to set forth the present invention, just understanding the present invention for helping, not in order to limit the present invention.For those skilled in the art; according to thought of the present invention; some simple deductions, distortion or replacement can also be made; such as the application scenario of different gear ratio; suitable magnet pellet number and the first permanent magnet number can be selected as required to realize, and these improvements and modifications are also considered as protection scope of the present invention.
Claims (10)
1. a magnetic gear low speed high torque motor, comprise: coaxial internal rotor (3), adjustable magnetic ring (2) and the stator (1) arranged successively from the inside to the outside, permanent magnet is provided with in described internal rotor, it is characterized in that, in described stator (1), be provided with the armature winding (5) producing rotating magnetic field and the electromagnet (4) producing stationary magnetic field.
2. magnetic gear low speed high torque motor as claimed in claim 1, it is characterized in that, described electromagnet (4) is DC coil.
3. magnetic gear low speed high torque motor as claimed in claim 2, is characterized in that, described stator (1) inner side arranges multiple stator tooth, and DC coil is wound on each stator tooth respectively.
4. magnetic gear low speed high torque motor as claimed in claim 3, is characterized in that, the DC coil reversal connection successively that position is adjacent.
5. magnetic gear low speed high torque motor as claimed in claim 4, it is characterized in that, described internal rotor (3) comprising: multiple first permanent magnets (31) that internal rotor iron core (32) and ring internal rotor iron core (32) outside are arranged;
Each first permanent magnet (31) is radially magnetized or parallel magnetization, and the magnetizing direction of the first permanent magnet (31) that position is adjacent is contrary.
6. magnetic gear low speed high torque motor as claimed in claim 5, it is characterized in that, described adjustable magnetic ring (2) is made up of the multiple adjustable magnetic iron core blocks be circular layout by prepsetting gap;
The number of adjustable magnetic iron core block equals number of pole-pairs that DC coil forms and the number of pole-pairs sum that the first permanent magnet (31) is formed, and the number of pole-pairs that DC coil is formed is greater than the number of pole-pairs that the first permanent magnet (31) is formed.
7. magnetic gear low speed high torque motor as claimed in claim 3, it is characterized in that, described armature winding (5) is connected and composed by coiling three-phase alternating current coil on the stator teeth.
8. magnetic gear low speed high torque motor as claimed in claim 5, it is characterized in that, each first permanent magnet (31) is along internal rotor iron core (32) radial magnetizing, or parallel magnetization.
9. the magnetic gear low speed high torque motor as described in claim 3-8 any one, it is characterized in that, under each stator tooth, be also respectively arranged with the second permanent magnet (16), the magnetizing direction of described second permanent magnet (16) is consistent with the magnetic direction of DC coil on this stator tooth.
10. magnetic gear low speed high torque motor as claimed in claim 1, it is characterized in that, also comprise: the first rotating shaft (8), the second rotating shaft (9), the first rotary supporting part (6), the second rotary supporting part (7), clutch shaft bearing (13), the first stationary support parts (11), the second bearing (14) and housing (10);
First stationary support parts (11) and housing (10) are connected to form cavity;
Described stator (1), adjustable magnetic ring (2) and internal rotor (3) are arranged in described cavity;
Adjustable magnetic ring (2) is fixed on the first rotary supporting part (6) and the second rotary supporting part (7), first rotary supporting part (6) and the first rotating shaft (8) are rigidly connected, and the first rotating shaft (8) is arranged in the first stationary support parts (11) by clutch shaft bearing (13);
Internal rotor (3) is fixed in the second rotating shaft (9), and the second rotating shaft (9) is connected in the second rotary supporting part (7) by the second bearing (14);
Stator (1) is fixed on the inner side of housing (10).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510334331.3A CN104953779A (en) | 2015-06-16 | 2015-06-16 | Low-speed and high-torque motor with magnetic gear |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510334331.3A CN104953779A (en) | 2015-06-16 | 2015-06-16 | Low-speed and high-torque motor with magnetic gear |
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| Publication Number | Publication Date |
|---|---|
| CN104953779A true CN104953779A (en) | 2015-09-30 |
Family
ID=54168215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510334331.3A Pending CN104953779A (en) | 2015-06-16 | 2015-06-16 | Low-speed and high-torque motor with magnetic gear |
Country Status (1)
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106218420A (en) * | 2016-08-09 | 2016-12-14 | 南方科技大学 | Driven by power used for electric vehicle and flywheel energy storage mixing arrangement and energy storage method thereof |
| CN106921271A (en) * | 2015-12-24 | 2017-07-04 | 奥迪股份公司 | For the motor and motor vehicle of motor vehicle |
| CN106059251B (en) * | 2016-06-02 | 2018-09-04 | 武汉磁创科技有限公司 | A kind of magnetic controllable permanent magnetic speed regulation device |
| CN108712056A (en) * | 2018-05-29 | 2018-10-26 | 华中科技大学 | A kind of magnetic geared system improving transmission stability |
| CN110748488A (en) * | 2019-10-14 | 2020-02-04 | 上海工程技术大学 | Magnetic adjustment type magnetic pump |
| CN117277626A (en) * | 2022-09-20 | 2023-12-22 | 罗灿 | Three-component magnetic regulating motor |
| CN117277624A (en) * | 2022-09-20 | 2023-12-22 | 罗灿 | Synchronous differential speed magneto |
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| CN204696889U (en) * | 2015-06-16 | 2015-10-07 | 南方科技大学 | Magnetic gear low speed high torque motor |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106921271A (en) * | 2015-12-24 | 2017-07-04 | 奥迪股份公司 | For the motor and motor vehicle of motor vehicle |
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| CN106059251B (en) * | 2016-06-02 | 2018-09-04 | 武汉磁创科技有限公司 | A kind of magnetic controllable permanent magnetic speed regulation device |
| CN106218420A (en) * | 2016-08-09 | 2016-12-14 | 南方科技大学 | Driven by power used for electric vehicle and flywheel energy storage mixing arrangement and energy storage method thereof |
| CN108712056A (en) * | 2018-05-29 | 2018-10-26 | 华中科技大学 | A kind of magnetic geared system improving transmission stability |
| CN110748488A (en) * | 2019-10-14 | 2020-02-04 | 上海工程技术大学 | Magnetic adjustment type magnetic pump |
| CN117277626A (en) * | 2022-09-20 | 2023-12-22 | 罗灿 | Three-component magnetic regulating motor |
| CN117277624A (en) * | 2022-09-20 | 2023-12-22 | 罗灿 | Synchronous differential speed magneto |
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Application publication date: 20150930 |
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