CN103490577A - Stator permanent magnet vernier motor with modules evenly distributed at circumference - Google Patents

Stator permanent magnet vernier motor with modules evenly distributed at circumference Download PDF

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Publication number
CN103490577A
CN103490577A CN201310444664.2A CN201310444664A CN103490577A CN 103490577 A CN103490577 A CN 103490577A CN 201310444664 A CN201310444664 A CN 201310444664A CN 103490577 A CN103490577 A CN 103490577A
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CN
China
Prior art keywords
stator
permanent magnet
rotor
air gap
permanent
Prior art date
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Pending
Application number
CN201310444664.2A
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Chinese (zh)
Inventor
吉敬华
赵建兴
赵文祥
朱纪洪
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Jiangsu University
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Jiangsu University
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Publication date
Application filed by Jiangsu University filed Critical Jiangsu University
Priority to CN201310444664.2A priority Critical patent/CN103490577A/en
Publication of CN103490577A publication Critical patent/CN103490577A/en
Pending legal-status Critical Current

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Abstract

The invention discloses a stator permanent magnet vernier motor with modules evenly distributed at the circumference. The stator permanent magnet vernier motor comprises an inner stator and an outer rotor. The multiple unit modules which are distributed along the circumference of an air gap are fixed to the outer ring of the inner stator. The side walls of every two adjacent unit modules are tightly attached together. Each unit module is composed of a permanent magnet and a magnetizer which are the same in size, wherein the side wall of the permanent magnet and the side wall of the magnetizer are tightly attached together. The permanent magnets are magnetized in a radial mode. The number P of pole-pairs of magnetic field distribution produced by the permanent magnets corresponds to the number of the unit modules and the number of rotor teeth. The magnetizer in each unit module can be replaced by another identical permanent magnet, and after replacement, the two permanent magnets in the same unit module are opposite in magnetizing direction. Due to the mutual cooperation of the unit modules, the limited notch space, near the stator, of the air gap is reasonably utilized, flux density in a magnetic circuit is increased effectively, counter potential in a winding is effectively improved, output torque and power density of the motor are improved, and the size is reduced correspondingly.

Description

A kind of stator permanent magnetic type vernier motor of circumference uniform distribution module
Technical field
The present invention relates to motor or the generator of a class high power density, belong to the magneto field, specifically the permanent-magnet type vernier motor.
Background technology
Vernier motor has the characteristics of low speed high torque, therefore in a lot of occasions, as fields such as track traffic, Ship Propeling, food processing and electric automobiles, has application scenario preferably.At present, more to permanent magnetism vernier motor research is rotor permanent magnet type motor, the permanent magnet of rotor permanent magnet type motor is placed on rotor, bring certain difficulty to the cooling of motor, and excess Temperature can affect the stable operation of motor, particularly works as motor to operate under overheat condition, motor temperature sharply raises, when temperature surpasses the Curie temperature of permanent magnet, can cause the permanent loss of excitation of permanent magnet, make the motor operation troubles.Stator permanent magnetic type electric is placed in permanent magnet on stator, rotor without winding also without permanent magnet, simple in structure, can effectively reduce the temperature rise of winding and permanent magnet by stator casing cavity water-cooled, improve power of motor density.
The structure of tradition vernier motor is that permanent magnet is placed on to the stator increment, notch is carved encapsulation or vacant with the groove of non-magnet material, cause thus motor to have comparatively serious leakage field in stator increment, rotor increment and air gap, had a strong impact on the useful flux contact area of motor, make close the reducing of motor effective air gap magnetic, cause the back-emf of responding in winding greatly to reduce, not enough to some extent thereby power density is compared with the rotor permanent magnet type motor of same volume, the motor utilance is low.
Summary of the invention
The objective of the invention is that leakage field is serious in order to solve in original stator permanent magnetic type vernier motor, in close less, the stator winding of magnetic, back-emf is less in air gap causes the problem that power of motor density is lower, a kind of stator permanent magnetic type vernier motor of circumference uniform distribution module is proposed, can improve air gap flux density, increase back electromotive force, improve output torque and power density.
The technical solution used in the present invention is: the present invention comprises internal stator and external rotor, there is air gap between internal stator and external rotor, external rotor has rotor tooth and rotor yoke, form stator slot between adjacent two stator cores of internal stator, place winding in stator slot, be fixed with several unit modules along the air gap circle distribution on the outer ring of internal stator, the sidewall of adjacent two unit modules fits tightly together, each unit module is comprised of measure-alike permanent magnet and magnetic conductor, together with the sidewall of permanent magnet and magnetic conductor fits tightly, the permanent magnet radial magnetizing, permanent magnet produces the number of pole-pairs of Distribution of Magnetic Field pnumber with unit module number with rotor tooth meet .
Magnetic conductor in each described unit module all can be identical with another permanent magnet replace, after replacing it, two permanent magnet magnetizing directions identical in same unit module are contrary.
The present invention adopts the advantage had after technique scheme to be:
1, adopt the unit module with permanent magnet in electric machine structure, by cooperatively interacting between each unit module, rationally utilized the limited notch space of air gap near stator side, the magnetic that can effectively increase in magnetic circuit is close, effectively improve the back-emf in winding, also improve motor output torque and power density, correspondingly reduce volume.
2, the present invention can adopt and concentrate or distributed winding, if do not change other condition, only changes the connected mode of winding, and the back electromotive force that distributed winding produces will be far longer than concentrated winding.
3, the present invention not only can be used as electric rotating machine, is applicable to too linear electric motors.
Below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
The accompanying drawing explanation
The radial structure schematic diagram of the stator permanent magnetic type vernier motor that Fig. 1 is circumference uniform distribution module of the present invention;
The deployed configuration enlarged diagram that Fig. 2 is external rotor 2 in Fig. 1;
The layout schematic diagram that Fig. 3 is unit module 300 in Fig. 1;
The deployed configuration enlarged diagram that Fig. 4 is individual unit module 300 in Fig. 3;
The winding of the stator permanent magnetic type vernier motor that Fig. 5 is three-phase circumference uniform distribution module of the present invention and the common stator permanent magnetic type vernier motor of three-phase is counter potential waveform contrast schematic diagram while concentrating winding.
In figure: 1. internal stator; 2. external rotor; 12. stator core; 14. stator slot; 21. rotor tooth; 22. rotor yoke; 19. fluting; 31. permanent magnet; 32. magnetic conductor; 300. unit module.
Embodiment
With reference to Fig. 1, the present invention comprises internal stator 1, external rotor 2, and there is fluting 19 at the center of internal stator 1, for laying rotating shaft, between internal stator 1 and external rotor 2, has air gap, and the size of air gap is according to motor size and require design.External rotor 2 forms dovetail groove by the rotor core fluting and forms, and internal stator 1 forms tooth slot structure by stator teeth notching.Be fixed with several unit modules along the air gap circle distribution 300 on the outer ring of internal stator 1, unit module 300 is near air gap one side.Form stator slot 14 between adjacent two stator cores 12 of internal stator 1, in stator slot 14, place winding, winding is for concentrating or distributed winding, and stator slot 14 can adopt various grooveds, chooses according to specific needs.
With reference to Fig. 2, external rotor 2 has rotor tooth 21, rotor yoke 22, and rotor tooth 21 is over against air gap one side, and rotor tooth 21 is trapezoidal shape.Rotor tooth 21 is near the width of air gap side s 1 with rotor slot-pitch tpthe ratio k 1 = s 1 / tp=0.2 ~ 0.5, preferred plan is to get 0.4, rotor tooth 21 is near air gap side width s 1 with the width of rotor tooth 21 near rotor yoke 22 s 2 the ratio k 2 = s 1 / s 2 =0.1 ~ 0.9, preferred plan is to get 0.6, the height of the height of rotor tooth 21 and rotor yoke 22 can be optimized according to needs, and rotor tooth 21 is processed by silicon steel plate stacking or permeability magnetic material with the material of rotor yoke 22.
With reference to Fig. 1,3,4, unit module 300 is comprised of permanent magnet 31 and magnetic conductor 32, the size dimension of permanent magnet 31 and magnetic conductor 32 is identical, permanent magnet 31 is with together with the sidewall of magnetic conductor 32 fits tightly, the sidewall of adjacent two unit modules 300 also fits tightly together, and all unit modules 300 surround an annular at the air gap place.Magnetic conductor 32 is made by permeability magnetic material.The permanent magnet that permanent magnet 31 is radial magnetizing.
Unit module 300 or can be formed by two identical permanent magnets 31, being about to another identical permanent magnet 31 of magnetic conductor 32 use replaces, difference is, for the unit module 300 after replacing it, the magnetizing direction of two the identical permanent magnets 31 in same unit module 300 is contrary, on radially same direction, one of them permanent magnet 31 is N, and another one permanent magnet 31 is S.
Permanent magnet 31 produces the number of pole-pairs of Distribution of Magnetic Field pnumber with unit module 300 number with rotor tooth 21 coordinate relevantly, the difference of the absolute value of the two be just the number of pole-pairs of permanent magnet 31 generation Distribution of Magnetic Field.Be formulated and be exactly:
If the number of unit module 300 be 48, rotor tooth 21 numbers be 50, permanent magnet 31 produces the number of pole-pairs in magnetic field so pbe exactly 2; If the number of unit module 300 remain unchanged, rotor tooth 21 numbers be 46, permanent magnet 31 produces the number of pole-pairs in magnetic field palso 2.
The winding of the stator permanent magnetic type vernier motor (curve A 1) that Fig. 5 is the common stator permanent magnet vernier motor of three-phase (curve A 2) and three-phase circumference uniform distribution module is the counter potential waveform figure while concentrating winding, can see when same size, the common stator permanent magnetic type vernier motor of three-phase back-emf (referring to curve A 2) amplitude is the 370V left and right, the back-emf of the stator permanent magnetic type vernier motor of three-phase circumference uniform distribution module of the present invention (referring to curve A 1) amplitude can reach 580V, thereby the power density of the stator permanent magnetic type vernier motor of circumference uniform distribution module of the present invention significantly improves.

Claims (3)

1. the stator permanent magnetic type vernier motor of a circumference uniform distribution module, comprise internal stator (1) and external rotor (2), there is air gap between internal stator (1) and external rotor (2), external rotor (2) has rotor tooth (21) and rotor yoke (22), form stator slot (14) between adjacent two stator cores (12) of internal stator (1), place winding in stator slot (14), it is characterized in that: be fixed with several unit modules along the air gap circle distribution on the outer ring of internal stator (1), the sidewall of adjacent two unit modules fits tightly together, each unit module is comprised of measure-alike permanent magnet (31) and magnetic conductor (32), the sidewall of permanent magnet (31) and magnetic conductor (32) fits tightly together, permanent magnet (31) radial magnetizing, permanent magnet (31) produces the number of pole-pairs of Distribution of Magnetic Field pnumber with unit module and the number of rotor tooth (21) meet .
2. the stator permanent magnetic type vernier motor of circumference uniform distribution module according to claim 1, it is characterized in that: the magnetic conductor (32) in each described unit module all uses another identical permanent magnet (31) to replace, and two permanent magnets (31) magnetizing direction identical in same unit module is contrary.
3. according to the stator permanent magnetic type vernier motor of the described arbitrary circumference uniform distribution module of claim 1 or 2, it is characterized in that: rotor tooth (21) is trapezoidal, rotor tooth (21) is 0.2 ~ 0.5 near the width of air gap side with the ratio of rotor slot-pitch, and the width of the close air gap side of rotor tooth (21) and rotor tooth (21) are 0.1 ~ 0.9 near the ratio of the width of rotor yoke (22).
CN201310444664.2A 2013-09-27 2013-09-27 Stator permanent magnet vernier motor with modules evenly distributed at circumference Pending CN103490577A (en)

Priority Applications (1)

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Application Number Priority Date Filing Date Title
CN201310444664.2A CN103490577A (en) 2013-09-27 2013-09-27 Stator permanent magnet vernier motor with modules evenly distributed at circumference

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CN103490577A true CN103490577A (en) 2014-01-01

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103795159A (en) * 2014-01-03 2014-05-14 东南大学 Stator-rotor double-permanent-magnet-type-vernier motor
CN107040117A (en) * 2016-02-04 2017-08-11 同济大学 Stator, linear electric motors and the linear compressor of linear compressor
WO2021120431A1 (en) * 2019-12-17 2021-06-24 西安交通大学 High-speed vernier motor having independently-driven conductor and compact structure

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102118072A (en) * 2011-01-26 2011-07-06 东南大学 Automatic accelerating permanent-magnet direct-drive motor
CN202405976U (en) * 2012-01-17 2012-08-29 东南大学 Permanent-magnet direct-drive vernier motor
CN102710078A (en) * 2012-06-13 2012-10-03 江苏大学 Fault tolerance type permanent magnetic vernier motor
CN103066719A (en) * 2012-12-14 2013-04-24 江苏大学 Magnetic gathering type stator permanent magnetic type vernier motor
CN103248193A (en) * 2013-05-27 2013-08-14 江苏大学 Fault-tolerate primary permanent magnetic vernier linear motor

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102118072A (en) * 2011-01-26 2011-07-06 东南大学 Automatic accelerating permanent-magnet direct-drive motor
CN202405976U (en) * 2012-01-17 2012-08-29 东南大学 Permanent-magnet direct-drive vernier motor
CN102710078A (en) * 2012-06-13 2012-10-03 江苏大学 Fault tolerance type permanent magnetic vernier motor
CN103066719A (en) * 2012-12-14 2013-04-24 江苏大学 Magnetic gathering type stator permanent magnetic type vernier motor
CN103248193A (en) * 2013-05-27 2013-08-14 江苏大学 Fault-tolerate primary permanent magnetic vernier linear motor

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
S.L.HO等: "Design and Comparison of Vernier Permanent Magnet Machines", 《IEEE TRANSACTIONS ON MAGNETICS》, vol. 47, no. 10, 31 October 2011 (2011-10-31), XP011383569, DOI: doi:10.1109/TMAG.2011.2157309 *
吉敬华等: "模块化永磁电机的设计分析与实验", 《电工技术学报》, vol. 25, no. 2, 28 February 2010 (2010-02-28), pages 22 - 29 *

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103795159A (en) * 2014-01-03 2014-05-14 东南大学 Stator-rotor double-permanent-magnet-type-vernier motor
CN103795159B (en) * 2014-01-03 2016-02-10 东南大学 The two permanent-magnet type vernier motor of rotor
CN107040117A (en) * 2016-02-04 2017-08-11 同济大学 Stator, linear electric motors and the linear compressor of linear compressor
WO2021120431A1 (en) * 2019-12-17 2021-06-24 西安交通大学 High-speed vernier motor having independently-driven conductor and compact structure

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Application publication date: 20140101