CN103178668A - Radial magnetic field double-stator vernier motor - Google Patents
Radial magnetic field double-stator vernier motor Download PDFInfo
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- CN103178668A CN103178668A CN2013100696278A CN201310069627A CN103178668A CN 103178668 A CN103178668 A CN 103178668A CN 2013100696278 A CN2013100696278 A CN 2013100696278A CN 201310069627 A CN201310069627 A CN 201310069627A CN 103178668 A CN103178668 A CN 103178668A
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Abstract
The invention discloses a radial magnetic field double-stator vernier motor which comprises a ring-shaped rotor (2) and two cylindrical stators (1 and 4). Multiple permanent magnets are arranged on the periphery of a ring body of the rotor at uniform intervals, multiple grooves are reserved on the peripheral wall of a cylinder body of each stator, each groove is used for accommodating a winding, and a projection between each two adjacent grooves forms a stator tooth. The radial magnetic field double-stator vernier motor is characterized in that the two stators (1 and 4) are different in diameter and are in coaxial inner-outer sleeving arrangement, the grooves on the two stators are identical in number, the rotor (2) is coaxially sleeved between the two stators (1 and 4), and distance between each stator tooth of the inner stator (4) and the corresponding stator tooth of the outer stator (1) is half of a groove spacing angle peripherally. Under the circumstance that the motor is similar to a traditional vernier motor in torque density, power factor is improved greatly and can reach above 0.8.
Description
Technical field
The invention belongs to machine field, be specifically related to a kind of vernier motor, be applicable to as wind power generation, naval vessel driving etc.
Background technology
Wind energy has been subject to comprising the great attention of Chinese countries in the world as a part very important in regenerative resource.In the past few years, the installed capacity of wind power generation vast scale for years increases, and especially in China, wind power generation has become an important regenerative resource industry.Wherein, wind-driven generator is as one of the parts of most critical in wind generator system, its designing technique, production technology have become the technology commanding elevation of countries in the world competition, especially direct-drive aerogenerator, its rotating speed is low, and volume is large, heavy, the wind-driven generator of high power density can the decrease wind-driven generator weight and cost, have great economic results in society.
Vernier motor (Vernier Machine) is subject to the attention of more and more industries in recent years, and the topology of this motor has power density and the simple advantage of mechanical structure of superelevation, is expected to obtain large-scale engineering applications.Due in the situation that invariablenes turning speed, the torque of motor is relevant with its unloaded back-emf size, and for traditional motor, the number of pole-pairs of stator and rotor is identical, can reduce in proportion stator magnetic linkage so increase number of poles, thereby can not improve unloaded back-emf by increasing number of poles.
as shown in Figure 1, the structure of existing vernier motor and common magneto is similar, formed by rotor and stator, the topmost characteristics of vernier motor are that the number of pole-pairs of its rotor is different, and the number of pole-pairs of common rotor is several times of the stator poles logarithm, in the invariablenes turning speed situation, the many alternative frequencies that can improve stator magnetic linkage of rotor pole logarithm, the number of pole-pairs of stator makes stator magnetic linkage can not reduce because the rotor number of poles increases in proportion less simultaneously, solve conventional motors and increased the contradiction that number of pole-pairs can reduce stator magnetic linkage in proportion, thereby can increase magnetic linkage alternative frequency and stator magnetic linkage product, and then increase unloaded back-emf, increase torque and power density.
The major defect of existing vernier motor is that its power factor is low, causes in the situation of given power output, needs to increase to drive Converter Capacity, thereby brings the increase cost, reduces the problems such as system operation reliability.The reason that vernier magneto power factor is low is relevant with the ratio of the product of phase current with main magnetic linkage and motor inductance.Compare with conventional motors, vernier motor rotor number of poles is a lot, approaches with the number of teeth, as seen from Figure 1, a large amount of magnetic fluxs pass air gap directly by stator teeth from magnetic pole, then return to another magnetic pole, and do not pass through stator winding, this just causes the permanent magnet leakage flux greatly to increase, simultaneously, and when one of adjacent permanent magnet is faced stator teeth, one will be in the face of stator slot, the magnetic circuit reluctance that adjacent permanent magnet consists of is large, causes main flux very low, so existing vernier motor power factor is very low.In fact, in the situation that adopt the electric loading close with traditional magneto, the vernier motor power factor of prior art can be low to moderate 0.2～0.3, and the power factor of traditional magneto can reach more than 0.90.
Summary of the invention
The present invention is intended to propose the two stator vernier motors of a kind of radial magnetic field, suit arrangement by rotor and two stators also arranges stator tooth and the relative position relation of rotating pole-piece, thereby improve power factor and the power density of vernier motor, solve the low problem of the low operational reliability that causes of existing vernier motor low power factor.
The two stator vernier motors of a kind of radial magnetic field of the present invention comprise:
Rotor, it is annular, and ring body week upwards is furnished with a plurality of permanent magnets in the interval;
Stator, it is cylindrical, has a plurality of grooves on the cylindrical shell perisporium, and each groove is used for holding winding, and the bossing between each groove forms stator tooth;
It is characterized in that, described stator is different two of diameter, and both are coaxial inside and outside socket and arrange, the groove groove number on two stators is identical, described rotor coaxial is sleeved between this two stator, and wherein the stator tooth of the stator tooth of internal stator and external stator in week upwards at a distance of half slot-pitch angle.
As improvement of the present invention, the stator tooth of described internal stator and the groove of external stator are over against layout.
As improvement of the present invention, the groove of described internal stator is opened on the cylindrical shell periphery wall.
As improvement of the present invention, the groove of described external stator is opened on the cylindrical shell internal perisporium.
As improvement of the present invention, described each permanent magnet is by the pole piece spacing, and each pole shoe connects by silicon steel bridge or non-magnet material.
As improvement of the present invention, be provided with bolt hole on described pole shoe, rotor is connected with torque tube by above-mentioned bolt hole.
As improvement of the present invention, described rotor is one-body molded, and described permanent magnet is contained in the groove that circumferentially arranges on rotor.
As improvement of the present invention, described external stator is fixed on casing, and described internal stator is fixed by stationary axle or support arm.
As improvement of the present invention, described rotating shaft is fixedly connected with torque tube on being arranged on rotating shaft by axial bolt.
As improvement of the present invention, described torque tube is that an end is fixed on the cantilever structure in rotating shaft or is that an end is fixed on that in rotating shaft, the other end is fixedly supported on rotatably by bearing
Structure on stationary axle.
The present invention adopts the radial magnetic field double-stator structure, its rotor and two stators suit are arranged, and by the relative position relation of stator tooth and rotating pole-piece is set, obtain compact electric machine structure, in the situation that close with the torque density of traditional vernier motor, power factor significantly improves, and can reach more than 0.8.
Description of drawings
Fig. 1 is a kind of vernier motor structural representation of the prior art;
In Fig. 2, (a) be the three-dimensional structure schematic diagram of the two stator vernier magnetoes of radial magnetic field of the embodiment of the present invention; (b) be the cross-sectional view of the two stator vernier magnetoes of radial magnetic field of the embodiment of the present invention;
Fig. 3 (a)-(d) is four kinds of different rotor structures (1/4 model) schematic diagram of the two stator vernier magnetoes of radial magnetic field of the embodiment of the present invention;
Fig. 4 (a)-(d) is the two stator vernier permanent magnet motor structure schematic diagrames of radial magnetic field of four kinds of different rotor structure of the embodiment of the present invention.
Fig. 5 is the application schematic diagram of vernier motor in direct-drive wind power system of the embodiment of the present invention.
Embodiment
Purpose of the present invention, technical scheme and effect are more clear to be understood in order to make, and below in conjunction with the drawings and specific embodiments, the present invention is described in further detail, and following examples are only for explaining the present invention, not consisting of limitation of the invention.
As shown in Figure 2, the vernier motor of the present embodiment comprises two stators and a rotor, and two stators are respectively internal stator 4 and external stator 1, and rotor 2 is in the middle of external stator 1 and internal stator 4, and the three is concentric.
The motor topology of the present embodiment contains two air gaps; Two stator winding 3 adopt single-phase or polyphase windings (Fig. 2 has only drawn the live part of winding, and the end does not draw).
The present embodiment vernier motor adjacent pole magnetic circuit is specially: the tooth section of at first passing internal stator 4 from internal stator 4 yoke sections, pass again the air gap between internal stator 4 and rotor 2, then pass the air gap between pole shoe and external stator 1 and rotor 2, and external stator 1 tooth section is to the yoke section of external stator 1.
The vernier motor of the present embodiment adopts double-sided stator, and internal stator tooth and external stator tooth differ slot-pitch angle half, and namely the internal stator tooth is relative with the external stator groove, close with the stator number of teeth due to the rotor number of poles again, so when motor was static, the pole shoe with adjacent was relative respectively with the external stator tooth for the internal stator tooth.as shown in Fig. 2 (b), than traditional vernier motor, double-stator structure utilizes half slot pitch of dislocation on internal stator and outer stator structure position, make internal stator tooth section and the main magnetic linkage of external stator tooth section's cooperation formation, and magnetic circuit reluctance is little, strengthen main field, having solved traditional vernier motor adjacent pole, to consist of magnetic circuit reluctance by stator tooth and groove large, and be the problem of leakage field, greatly reduced leakage flux, utilize in addition the magnet modes of emplacement to realize poly-magnetic effect, greatly improved main flux, improved the permanent magnet utilance, make the magnetic field of permanent magnet of vernier motor strengthen, increase its torque fan-out capability, greatly improved simultaneously its power factor.
The present invention adopts double-stator structure, and its mechanical structure is comparatively complicated, and Design of Mechanical Structure not only has influence on the problems such as operational reliability of the present invention, also can have influence on electromagnetic performance of the present invention.
Rotor magnet of the present invention adopts and circumferentially magnetizes, and Fig. 3 has provided four kinds of different rotor mechanical structures, and each pole shoe of rotor shown in Fig. 3 (a) connects by narrower silicon steel bridging, and bolt hole is arranged on pole shoe, and the number of bolt hole is indefinite; Rotor is connected with torque tube by these axial bolts, and this structure is because its silicon steel bridge is narrower, and the leakage magnetic circuit magnetic resistance of formation is large, can reduce the permanent magnet leakage flux like this.
Fig. 3 (b) compares with (a), there is no the axial bolts hole, and other part-structures are identical; Adopt this structure owing to there is no bolt hole, main magnetic circuit can not be subject to the impact of bolt hole, but rotor mechanical stability is not as (a).
Shown in Fig. 3 (c), in structure, each pole shoe can adopt the connections such as non-magnet material such as epoxy resin, adopts this structure whether the silicon steel bridge is arranged, and its permanent magnet leakage field is little, increases the permanent magnet utilance, improves the torque fan-out capability;
Fig. 3 (d) rotor is one, and permanent magnet is placed in the groove of opening on rotor, this construction machine good stability, but leakage field is larger.
Above-mentioned several rotor structure is schematic construction, and the present invention is not limited to these structures, and other similar Structural Transformations are all in protection scope of the present invention.
Two stator vernier magnetoes contain two stators and a rotor, and mechanical structure is comparatively complicated.Fig. 4 has provided four kinds of mechanical structure signals, the invention is not restricted to this several mechanical structures, and other similar structures are also in protection scope of the present invention.Fig. 4 (a) is cantilever beam structure, and rotor 2 is connected by axial bolt with torque tube, and torque tube is the cantilever beam form, and it is fixedly installed in rotating shaft 6, and external stator 1 is fixedly installed on casing 7, and internal stator 4 is fixedly installed on stationary axle 5 by bracing frame.There is support the axial both sides of Fig. 4 (b) rotor 2, and namely rotor 2 is fixed by the bracing frame at axial two ends after utilizing axial bolt to connect by torque tube, and external stator 1 is fixedly installed on casing 7, and internal stator 4 is fixedly installed on stationary axle 5 by bracing frame.In Fig. 4 (c), internal stator 4 is placed on support arm 8, is fixedly installed on casing 7 on this support arm 8, and need not stationary axle this moment, and rotor structure and Fig. 4 (a) are similar.Stator structure in Fig. 4 (d) is identical with Fig. 4 (a), and the live part of rotor 2 is connected with torque tube by the pressure of two bearings, need not to beat bolt hole on this construction rotor pole shoe again.
As a kind of electromechanical energy conversion device, the generation of motor torque can ascribe stator rotating magnetic field and rotor field interaction rotor driven rotation (motor) to, and in order to produce constant torque, two rotating magnetic field numbers of poles must be the same.Vernier motor only need satisfy rotor number of pole-pairs sum and equal the groove number and can realize its function.Specifically, the magnetic field that rotor permanent magnet produces and stator teeth groove interact, produce a lot of magnetic fields harmonic wave, when satisfying rotor number of pole-pairs sum and equal this condition of number of stator slots, in the air-gap field that rotor permanent magnet produces, the harmonic field content identical with stator poles is very large, and the magnetic field interaction that this moment, this harmonic field and stator produced produces constant torque, thereby realizes that power produces.
Radially vernier motor of the present invention can be applied in directly-driving wind power generation system, is illustrated in figure 5 as a kind of directly-driving wind power generation system based on the two stator vernier motors of radial magnetic field, and it is by fan blade, the two stator vernier generators of radial magnetic field, rectifier, dc bus, inverter forms.Certainly, the two stator vernier generators of radial magnetic field are not limited only to said system in wind-powered electricity generation field application, also can coordinate different wind power systems.Vernier motor of the present invention can also be used for other dynamical systems field such as the electric propulsion field on naval vessel.
Claims (10)
1. two stator vernier motors of a radial magnetic field comprise:
Rotor (2), it is annular, and ring body week upwards is furnished with a plurality of permanent magnets in the interval;
Stator (Isosorbide-5-Nitrae), it is cylindrical, evenly has a plurality of grooves on the cylindrical shell perisporium, and each groove is used for holding winding, and the bossing between each groove on the cylindrical shell perisporium forms stator tooth;
It is characterized in that, described stator (1,4) be different two of diameter, both are coaxial inside and outside socket and arrange, groove groove number on this two stator (Isosorbide-5-Nitrae) is identical, and described rotor (2) coaxial package is at described two stators (1,4) between, the stator tooth of the stator tooth of wherein said internal stator (4) and external stator (1) made progress at a distance of half slot-pitch angle in week.
2. two stator vernier motors of a kind of radial magnetic field according to claim 1, wherein, the groove of the stator tooth of described internal stator (4) and external stator (1) is over against layout.
3. two stator vernier motors of a kind of radial magnetic field according to claim 1 and 2, wherein, the groove of described internal stator (4) is opened on the cylindrical shell periphery wall.
4. two stator vernier motors of the described a kind of radial magnetic field of any one according to claim 1-3, wherein, the groove of described external stator (4) is opened on the cylindrical shell internal perisporium.
5. two stator vernier motors of the described a kind of radial magnetic field of any one according to claim 1-4, wherein, described each permanent magnet is by the pole piece spacing, and each pole shoe connects by silicon steel bridge or non-magnet material.
6. the two stator vernier motors of the described a kind of radial magnetic field of any one according to claim 1-5, wherein, be provided with bolt hole on described pole shoe, and described rotor (2) is connected with torque tube by above-mentioned bolt hole.
7. two stator vernier motors of the described a kind of radial magnetic field of any one according to claim 1-6, wherein, described rotor (2) is one-body molded, and described each permanent magnet is contained in the upper circumferentially groove that evenly interval arranges of rotor (2).
8. two stator vernier motors of the described a kind of radial magnetic field of any one according to claim 1-7, wherein, described external stator (1) is fixed on casing, described internal stator (4) is fixing by stationary axle (5) or support arm (8), and described rotor (2) is fixedly connected with torque tube on being arranged on machine shaft (6) by axial bolt.
9. two stator vernier motors of the described a kind of radial magnetic field of any one according to claim 1-8, wherein, described torque tube is that an end is fixed on the cantilever structure on machine shaft (6), or is that an end is fixed on the upper other end of machine shaft (6) and is fixedly supported on rotatably portal structures on stationary axle (5) by bearing.
10. the two application of stator vernier motor in wind generator system or Marine power plant of the described radial magnetic field of any one in claim 1-9.
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| CN201310069627.8A CN103178668B (en) | 2013-03-06 | 2013-03-06 | Radial magnetic field double-stator vernier motor |
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| CN201310069627.8A CN103178668B (en) | 2013-03-06 | 2013-03-06 | Radial magnetic field double-stator vernier motor |
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| CN103178668B CN103178668B (en) | 2015-12-09 |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104113173A (en) * | 2014-07-11 | 2014-10-22 | 华中科技大学 | Double-stator single-winding vernier permanent magnet motor |
| CN104201848A (en) * | 2014-07-04 | 2014-12-10 | 东南大学 | Double-stator permanent-magnet vernier wind driven generator |
| CN104393728A (en) * | 2014-12-23 | 2015-03-04 | 南车株洲电机有限公司 | Double-stator motor |
| JP2016005412A (en) * | 2014-06-19 | 2016-01-12 | 株式会社明電舎 | Vernier motor |
| CN105305669A (en) * | 2015-11-20 | 2016-02-03 | 武汉理工大学 | Rotor electric excitation vernier magnetic resistance motor |
| CN105391202A (en) * | 2015-11-20 | 2016-03-09 | 武汉理工大学 | Stator electro-magnetic vernier motor |
| CN106208579A (en) * | 2016-07-21 | 2016-12-07 | 哈尔滨理工大学 | Rotor cage bar magnet steel compound bimorph transducer simplex winding vernier motor |
| CN106602823A (en) * | 2017-02-23 | 2017-04-26 | 武汉理工大学 | Double-claw-pole-stator magnetic gathering type vernier motor |
| CN107834796A (en) * | 2017-09-21 | 2018-03-23 | 哈尔滨理工大学 | A kind of magnetic flux memory formula magnetic gear compound machine |
| CN108886312A (en) * | 2016-04-26 | 2018-11-23 | Abb瑞士股份有限公司 | Bimorph transducer rotating electric machine |
| CN109245471A (en) * | 2018-11-06 | 2019-01-18 | 武汉理工大学 | A kind of alternately polar permanent magnetic vernier motor |
| CN109510337A (en) * | 2018-10-31 | 2019-03-22 | 浙江大学 | A kind of double-stator permanent magnet generator of alternating poles |
| CN109768683A (en) * | 2018-12-28 | 2019-05-17 | 江苏大学 | A kind of bimorph transducer magnetic field modulation magneto suitable for electric tractor |
| JP2020080607A (en) * | 2018-11-13 | 2020-05-28 | 株式会社豊田中央研究所 | Rotary electric machine |
| CN114640232A (en) * | 2022-03-29 | 2022-06-17 | 中国人民解放军国防科技大学 | Side-by-side double-stator staggered-tooth permanent magnet vernier motor |
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Cited By (20)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2016005412A (en) * | 2014-06-19 | 2016-01-12 | 株式会社明電舎 | Vernier motor |
| CN104201848B (en) * | 2014-07-04 | 2017-06-06 | 东南大学 | A kind of double-stator permanent magnet vernier wind-driven generator |
| CN104201848A (en) * | 2014-07-04 | 2014-12-10 | 东南大学 | Double-stator permanent-magnet vernier wind driven generator |
| CN104113173A (en) * | 2014-07-11 | 2014-10-22 | 华中科技大学 | Double-stator single-winding vernier permanent magnet motor |
| CN104393728B (en) * | 2014-12-23 | 2017-10-03 | 南车株洲电机有限公司 | A kind of Double-stator motor |
| CN104393728A (en) * | 2014-12-23 | 2015-03-04 | 南车株洲电机有限公司 | Double-stator motor |
| CN105391202A (en) * | 2015-11-20 | 2016-03-09 | 武汉理工大学 | Stator electro-magnetic vernier motor |
| CN105305669A (en) * | 2015-11-20 | 2016-02-03 | 武汉理工大学 | Rotor electric excitation vernier magnetic resistance motor |
| CN105391202B (en) * | 2015-11-20 | 2019-04-30 | 武汉理工大学 | A kind of stator electrical excitation vernier motor |
| CN108886312A (en) * | 2016-04-26 | 2018-11-23 | Abb瑞士股份有限公司 | Bimorph transducer rotating electric machine |
| US11239734B2 (en) | 2016-04-26 | 2022-02-01 | Abb Schweiz Ag | Double stator rotating electrical machine |
| CN106208579A (en) * | 2016-07-21 | 2016-12-07 | 哈尔滨理工大学 | Rotor cage bar magnet steel compound bimorph transducer simplex winding vernier motor |
| CN106602823A (en) * | 2017-02-23 | 2017-04-26 | 武汉理工大学 | Double-claw-pole-stator magnetic gathering type vernier motor |
| CN107834796A (en) * | 2017-09-21 | 2018-03-23 | 哈尔滨理工大学 | A kind of magnetic flux memory formula magnetic gear compound machine |
| CN109510337A (en) * | 2018-10-31 | 2019-03-22 | 浙江大学 | A kind of double-stator permanent magnet generator of alternating poles |
| CN109245471A (en) * | 2018-11-06 | 2019-01-18 | 武汉理工大学 | A kind of alternately polar permanent magnetic vernier motor |
| JP2020080607A (en) * | 2018-11-13 | 2020-05-28 | 株式会社豊田中央研究所 | Rotary electric machine |
| JP7159800B2 (en) | 2018-11-13 | 2022-10-25 | 株式会社豊田中央研究所 | Rotating electric machine |
| CN109768683A (en) * | 2018-12-28 | 2019-05-17 | 江苏大学 | A kind of bimorph transducer magnetic field modulation magneto suitable for electric tractor |
| CN114640232A (en) * | 2022-03-29 | 2022-06-17 | 中国人民解放军国防科技大学 | Side-by-side double-stator staggered-tooth permanent magnet vernier motor |
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