CN203617800U - Stator permanent magnet type vernier motor structure capable of reducing positioning force - Google Patents
Stator permanent magnet type vernier motor structure capable of reducing positioning force Download PDFInfo
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- CN203617800U CN203617800U CN201320598363.0U CN201320598363U CN203617800U CN 203617800 U CN203617800 U CN 203617800U CN 201320598363 U CN201320598363 U CN 201320598363U CN 203617800 U CN203617800 U CN 203617800U
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- permanent magnet
- tooth
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Abstract
The utility model discloses a stator permanent magnet type vernier motor structure capable of reducing positioning force. The structure comprises a primary portion and a secondary portion, wherein an air gap is formed thererbetween. A plurality of virtual slots and a plurality of virtual teeth are arranged at the tooth end of each tooth of the primary portion along the moving direction of a motor, the number of the virtual teeth is N1, the number of the virtual slots is N2, the relation of N1 and N2 is N1=N2+1, and the N2 is an odd number larger than 1; a fourth permanent magnet is embedded in the virtual slot right in the middle, and magnetism gathering modules are embedded in the other virtual slots; the magnetizing direction of the fourth permanent magnet is perpendicular to the moving direction of the motor and is towards the air gap; each magnetism gathering module is formed by sequentially and tightly attaching three permanent magnets, wherein the magnetizing direction of the middle permanent magnet is perpendicular to the moving direction of the motor and is towards the air gap, the two permanent magnets on the two sides are oppositely magnetized, and the magnetizing direction is the same as the moving direction of the motor; due to the matching of the permanent magnets and the magnetism gathering modules, the positioning force can be reduced, and meanwhile performance indexes such as no-load counter electromotive force, thrust output and the number of the permanent magnets are not affected.
Description
Technical field
The utility model relates to a kind of motor manufacturing technology and primary permanent magnet type motor detent force technology, particularly stator permanent magnetic type vernier motor structure.
Background technology
Vernier motor has the feature of low speed high torque, therefore has good application scenario in a lot of occasions as fields such as track traffic, Ship Propeling, food processing and electric automobiles.At present, to permanent magnetism vernier motor research more be rotor permanent magnet type motor, and permanent magnet is placed on rotor, in the process of motor operation, will produce heat radiation difficulty, and crosses high temperature rise and can cause the permanent loss of excitation of permanent magnet, thereby makes motor operation troubles.Stator permanent magnetic type electric is all placed in permanent magnet and armature winding 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.
Chinese Patent Application No. is 201210539414.2, name is called in " a kind of magneticfocusing stator permanent magnetic type vernier motor ", permanent magnet is placed on stator, motor adopts double-salient-pole structure, when the poly-magnetic effect of poly-magnetic module makes in air gap that air gap flux density increases, it is more serious that the problem of detent force becomes, excessive detent force not only can be brought difficulty to electric motor starting, and can cause the larger torque pulsation of existence in motor operation course, thereby has limited its application in each field.Therefore the detent force that, adopts effective way to reduce magneticfocusing stator permanent magnetic type vernier motor becomes this area urgent problem.
Summary of the invention
The purpose of this utility model is in order to solve the larger problem of detent force in existing magneticfocusing stator permanent magnetic type vernier motor, a kind of stator permanent magnetic type vernier motor structure that can reduce detent force has been proposed, when guaranteeing that detent force effectively reduces, the performance such as unloaded back electromotive force, thrust output of motor is constant.
In order to realize foregoing invention object, the utility model adopts following technical scheme: the utility model comprises between primary and secondary primary and secondary and has air gap, secondaryly form dovetail groove by iron core fluting and form, elementary upper fluting forms tooth slot structure, between elementary adjacent two teeth, it is groove, in groove, place winding, be provided with multiple empty grooves and multiple empty tooth, the number of empty tooth at the increment of elementary each tooth along motor movement direction
n 1 number with empty groove
n 2 relation be
,
n 2 for being greater than 1 odd number; In the empty groove of middle, be embedded with the 4th permanent magnet, remaining empty groove is embedded with poly-magnetic module; The 4th permanent magnet magnetizing direction and motor movement direction are perpendicular and towards air gap; Poly-magnetic module is fitted tightly and forms successively by three permanent magnets, one of centre permanent magnet magnetizing direction wherein and motor movement direction is perpendicular and towards air gap, two permanent magnets of both sides relatively magnetize and magnetizing direction identical with motor movement direction.
The utlity model has following advantage:
1, traditional method reducing for magneto detent force, comprises that skewed stator slot, skewed-rotor, stator rabbet width are unequal all can produce to a certain degree impact to the performance of motor, and increases complexity and the cost of manufacturing process.And the solution the utility model proposes for replacing poly-magnetic module with permanent magnet in the empty tooth in centre, by cooperatively interacting of permanent magnet and poly-magnetic module, can in reducing detent force, guarantee that the performance index such as the unloaded back electromotive force, thrust output, permanent magnet consumption of motor are unaffected, the consumption of the total permanent magnet of motor can not be increased, thereby can not increase motor manufacturing cost, and do not need electric motor primary increment to make any change, thereby in engineering, be very easy to implement.
2, the width of empty groove and empty tooth does not all change, thereby can not affect greatly the performance such as unloaded back electromotive force and output of motor.The utility model had both reduced detent force, retained again power density greatly, easy cooling, the feature that is applicable to high-speed cruising.Torque pulsation problem with the servo drive system of its composition when the operation can be effectively controlled.
3, the advantage of the secondary employing stepped tooth in the utility model is to reduce leakage field, effectively improves air gap flux density, thereby the power density that improves motor is with efficiency.
4, the utility model not only can be used as linear electric motors, can be suitable for too electric rotating machine.
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Accompanying drawing explanation
Fig. 1 is the stator permanent magnetic type vernier motor structural front view that reduces detent force described in the utility model;
Fig. 2 is the local enlarged diagram of secondary structure in Fig. 1;
Fig. 3 is the structure enlarged diagram of an elementary tooth in Fig. 1;
Fig. 4 is single poly-magnetic modular structure enlarged diagram in Fig. 3;
Fig. 5 is the detent force contrast schematic diagram of traditional three-phase magneticfocusing primary permanent magnet type vernier linear electric motors and the stator permanent magnetic type vernier motor structure that reduces detent force described in the utility model;
Fig. 6 is the back-emf comparison diagram of traditional three-phase magneticfocusing primary permanent magnet type vernier linear electric motors and the stator permanent magnetic type vernier motor structure that reduces detent force described in the utility model;
?in figure: 1. elementary; 2. time level; 11. increments; 12. empty grooves; 13. empty teeth; 14. grooves; 21. teeth; 22. yoke portions; 31,32,33,34. permanent magnets; 300. poly-magnetic modules.
Embodiment
Referring to Fig. 1, the stator permanent magnetic type vernier motor structure that reduces detent force described in the utility model comprises elementary 1 and secondary 2 two parts, between elementary 1 and secondary 2, has air gap, and the thickness of air gap is chosen according to motor size and requirement.Secondary 2 form dovetail groove by iron core fluting forms, and fluting formation tooth slot structure on elementary 1 is groove 14 between adjacent two teeth on elementary 1, groove 14 is used for placing winding, winding is for concentrating or distributed winding, and groove 14 can adopt various grooveds, chooses according to specific needs.
Referring to Fig. 1 and Fig. 2, a tooth of secondary 1 comprises tooth 21, yoke portion 22, and tooth 21 is just trapezoidal shape to air gap side.Tooth 21 is near air gap side width
s 1 with tooth pitch
t p ratio
k 1 =S 1 / T p ,
k 1 be 0.1 ~ 0.5,
k 1 the best gets 0.4.Tooth 21 is near air gap side width
s 1 with the width of tooth 21 near secondary yoke portion 22
s 2 ratio
k 2 =S 1 / S 2 ,
k 2 be 0.5 ~ 1,
k 2 the best gets 0.8.The height of tooth 21 and yoke portion 22 can be optimized according to needs.The number of the tooth on elementary 1 can be chosen according to specific needs, and secondary 1 material is processed by silicon steel plate stacking or permeability magnetic material.
Referring to Fig. 1 and Fig. 3, the increment 11 of the each tooth elementary 1, has multiple empty grooves 12 along motor movement direction, correspondingly forms multiple empty teeth 13.The number of empty tooth 13
n 1 number with empty groove 12
n 2 relation be:
, and
n 2 for being greater than 1 odd number.Embedding permanent magnet 34 in the empty groove 12 of middle, the embedded poly-magnetic module 300 of remaining empty groove 12.Permanent magnet 34 is concordant with the oral area of empty groove 12 in the one side in the face of air gap with poly-magnetic module 300.Permanent magnet 34 magnetizing directions and motor movement direction are perpendicular, and towards air gap.The width of permanent magnet 34 in the empty groove 12 in middle in motor movement direction is consistent with the width of the poly-magnetic module 300 in all the other empty grooves 12.
Referring to Fig. 3 and Fig. 4, poly-magnetic module 300 is in turn fitted tightly together and forms by three permanent magnets 31,32,33.The volume of a middle permanent magnet 32 is greater than the volume of two permanent magnets 31,33 of both sides, and two permanent magnets, 31,33 physical dimensions of both sides are identical.In three permanent magnets of poly-magnetic module 300, magnetizing direction and the motor movement direction of a middle permanent magnet 32 are perpendicular, and towards air gap, and two permanent magnets 31,33 of both sides magnetize relatively, and magnetizing direction is identical with motor movement direction, magnetizing direction is shown in shown in the arrow on Fig. 4.
Four empty teeth 13 and three empty grooves 12 shown in Fig. 3, gather magnetic module 300 at first and the interior placement of the 3rd empty groove 12, at second interior placement permanent magnet 34 of empty groove 12, all empty groove 12 width are consistent, and the width of the permanent magnet 34 in second empty groove 12 is consistent with the width of poly-magnetic module 300.
Fig. 5 is the comparison diagram of the detent force of traditional three gathering magnetic module primary permanent magnet type vernier linear electric motors and electric machine structure described in the utility model, in Fig. 5, curve A 1 is the wavy line of traditional three gathering magnetic module primary permanent magnet type vernier linear electric motors detent force, the wavy line of the detent force that curve B 1 is electric machine structure described in the utility model, can find out that the detent force of electric machine structure described in the utility model is much smaller than the detent force of conventional motors in the situation that keeping all the other parameter constants.
Fig. 6 is the comparison diagram of the back-emf of traditional three gathering magnetic module primary permanent magnet type vernier linear electric motors and motor described in the utility model, the counter potential waveform line that in Fig. 6, curve A is conventional motors, curve B is the wavy line of the back-emf of motor described in the utility model, the back-emf that can find out the two remains unchanged substantially, therefore the power density of motor described in the utility model is not subject to large impact, and the stationary performance of thrust is better improved.
Claims (4)
1. one kind reduces the stator permanent magnetic type vernier motor structure of detent force, comprise between elementary (1) and secondary (2) elementary (1) and secondary (2) and there is air gap, secondary (2) form dovetail groove by iron core fluting and form, elementary (1) upper fluting forms tooth slot structure, between elementary (1) upper adjacent two teeth, be groove (14), in groove (14), place winding, it is characterized in that: the increment at each tooth of elementary (1) is provided with multiple empty grooves (12) and multiple empty tooth (13), the number of empty tooth (13) along motor movement direction
n 1 number with empty groove (12)
n 2 relation be
,
n 2 for being greater than 1 odd number; In the empty groove (12) of middle, be embedded with the 4th permanent magnet (34), remaining empty groove (12) is embedded with poly-magnetic module (300); The 4th permanent magnet (34) magnetizing direction and motor movement direction is perpendicular and towards air gap; Poly-magnetic module (300) is fitted tightly and forms successively by three permanent magnets, one of centre permanent magnet (32) magnetizing direction wherein and motor movement direction is perpendicular and towards air gap, two permanent magnets (31,33) of both sides relatively magnetize and magnetizing direction identical with motor movement direction.
2. a kind of stator permanent magnetic type vernier motor structure that reduces detent force according to claim 1, it is characterized in that: a tooth of secondary (1) comprises tooth (21), yoke portion (22), described tooth (21) is just trapezoidal to air gap side, and described tooth (21) is near air gap side width
s 1 with tooth pitch
t p ratio
k 1 =0.1 ~ 0.5, described tooth (21) is near air gap side width
s 1 with the width of described tooth (21) near secondary yoke portion (22)
s 2 ratio
k 2 =0.5 ~ 1.
3. a kind of stator permanent magnetic type vernier motor structure that reduces detent force according to claim 1, it is characterized in that: in three permanent magnets of poly-magnetic module (300), the volume of the permanent magnet in centre (32) is wherein greater than the volume of two permanent magnets (31,33) of both sides, and two permanent magnets (31,33) physical dimension of both sides is identical.
4. a kind of stator permanent magnetic type vernier motor structure that reduces detent force according to claim 1, is characterized in that: the width of the 4th permanent magnet (34) in motor movement direction is identical with the width of poly-magnetic module (300).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320598363.0U CN203617800U (en) | 2013-09-27 | 2013-09-27 | Stator permanent magnet type vernier motor structure capable of reducing positioning force |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320598363.0U CN203617800U (en) | 2013-09-27 | 2013-09-27 | Stator permanent magnet type vernier motor structure capable of reducing positioning force |
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| CN203617800U true CN203617800U (en) | 2014-05-28 |
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| CN201320598363.0U Withdrawn - After Issue CN203617800U (en) | 2013-09-27 | 2013-09-27 | Stator permanent magnet type vernier motor structure capable of reducing positioning force |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490534A (en) * | 2013-09-27 | 2014-01-01 | 江苏大学 | Stator permanent magnet type cursor motor structure for reducing positioning force |
| CN106374718A (en) * | 2016-10-28 | 2017-02-01 | 华中科技大学 | Magnetic-concentrating-type consequent-pole cursor permanent magnet motor and application thereof |
| RU168789U1 (en) * | 2016-07-27 | 2017-02-21 | Федеральное Государственное Бюджетное Образовательное Учреждение Высшего Образования "Новосибирский Государственный Технический Университет" | Permanent Magnet Electric Machine |
| CN107359712A (en) * | 2017-07-19 | 2017-11-17 | 南京航空航天大学 | Winding modularization magneto |
-
2013
- 2013-09-27 CN CN201320598363.0U patent/CN203617800U/en not_active Withdrawn - After Issue
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490534A (en) * | 2013-09-27 | 2014-01-01 | 江苏大学 | Stator permanent magnet type cursor motor structure for reducing positioning force |
| RU168789U1 (en) * | 2016-07-27 | 2017-02-21 | Федеральное Государственное Бюджетное Образовательное Учреждение Высшего Образования "Новосибирский Государственный Технический Университет" | Permanent Magnet Electric Machine |
| CN106374718A (en) * | 2016-10-28 | 2017-02-01 | 华中科技大学 | Magnetic-concentrating-type consequent-pole cursor permanent magnet motor and application thereof |
| CN106374718B (en) * | 2016-10-28 | 2019-06-18 | 华中科技大学 | Concentrated magnetic replaces pole vernier magneto and its application |
| CN107359712A (en) * | 2017-07-19 | 2017-11-17 | 南京航空航天大学 | Winding modularization magneto |
| CN107359712B (en) * | 2017-07-19 | 2019-07-09 | 南京航空航天大学 | Winding modularization magneto |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20140528 Effective date of abandoning: 20160629 |
|
| C25 | Abandonment of patent right or utility model to avoid double patenting |