CN101662198A - Stator surface mounted doubly salient pole permanent magnet motor - Google Patents
Stator surface mounted doubly salient pole permanent magnet motor Download PDFInfo
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- CN101662198A CN101662198A CN200910184159A CN200910184159A CN101662198A CN 101662198 A CN101662198 A CN 101662198A CN 200910184159 A CN200910184159 A CN 200910184159A CN 200910184159 A CN200910184159 A CN 200910184159A CN 101662198 A CN101662198 A CN 101662198A
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- permanent magnet
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- doubly salient
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- 230000004907 flux Effects 0.000 description 4
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Abstract
The invention discloses a stator surface mounted doubly salient pole permanent magnet motor which has simple and firm structure, stronger torque output capacity and higher power density, comprises a stator (1) and a rotor (4), and is characterized in that the rotor (4) is positioned in the stator (1); the stator (1) and the rotor (4) are both in doubly salient pole structure; the stator (1) is provided with a concentrated winding (3) and a permanent magnet (2), wherein, each concentrated winding coil of any phase of the concentrated winding (3) is positioned in an iron-core groove of the stator (1), and each phase concentrated winding coil is in series connection or in parallel connection; the permanent magnet (2) is positioned on the top part of tooth of the stator (1). The motor has no-load counter-electromotive force of a high degree approximate square wave (a straight flute rotor) or a sinusoidal wave (a tapered slot rotor), stronger torque output capacity, higher power density andstronger anti-demagnetizing capacity, and is especially suitable for being used as a driving element of an alternating current governor system.
Description
Technical field
The present invention is a kind of simple in structure, firm, has the motor of strong torque fan-out capability and higher power density, relates to the technical field that motor is made.
Background technology
China's conduct is the country of rare earth material reserves maximum in the world, and the research and extension application is the various novel permanent magnetic motors of representative with the rare-earth permanent-magnet electric machine energetically, has important significance for theories and using value.No matter work generates electricity or electric operation, and the novel permanent magnetic motor with characteristics such as high efficiency, big torque (power) density and low-losses is just presenting the trend of accelerated development.Past study during the last ten years focus concentrate on always with surface-adhered type, plug-in type and embedded be the rotor permanent magnet-type motor of representative.Yet, the motor type that permanent magnet is positioned over rotor all can produce into a series of problems in the design and running process, concentrated reflection is following 5 points: 1. pair permanent magnet sticks on the structure between rotor surface or the insertion rotor with salient pole, in order to overcome the centrifugal forces affect that high-speed cruising produces, usually need to make auxiliary permanent magnet fixture, increased technology; And permanent magnet is between stator and the rotor, has strengthened gas length, has both increased motor volume, has weakened air gap flux density, forced partial outage again; 2. to the embedded structure of permanent magnet submerged rotor core inside, can influence the mechanical strength of rotor, and need auxiliary magnetic bridge, can increase manufacture craft and cost equally; 3. permanent magnet places rotor, is unfavorable for the cooling of the type motor, often needs to carry out the design of special wind path or other type of cooling in order to dispel the heat; 4. the magnet steel that extensively adopts at present all is the lower neodymium iron boron of Curie temperature, influenced by temperature rise and causes magneto to have certain demagnetization even complete loss of excitation risk; 5. if expectation utilizes the stator armature winding that rotor magnetic steel is magnetized or degaussing, for the structure of rotor permanent-magnet type, stator armature winding magnetic potential need be passed through air-gap reluctance, and the cost increase that causes magnetizing is even unfeasible.
Therefore, work out the new structure magneto that can overcome above-mentioned shortcoming and just become the duty-bound mission critical of machine operation person, and the scheme that has occurred in the world at present has the motor of three kinds of stator permanent magnetic type structures, promptly unipolar doubly salient permanent magnet motor, ambipolar flux switch permanent magnet motor and ambipolar flux-reversal magneto.Wherein, the structural principle of magnetic flux reverse motor is that two opposite polarity permanent magnets are installed on each salient pole stator tooth side by side, its objective is in order to obtain ambipolar permanent magnetism magnetic linkage, but this structure directly causes two blocks of magnet steel and stator tooth to form short circuit, leakage field is serious, has reduced the utilance of unit magnet steel.Purpose of the present invention is exactly the shortcoming at the type flow direction magneto, has proposed a kind of stator surface mounted doubly salient pole permanent magnet motor of new structure.
Summary of the invention
Technical problem: the purpose of this invention is to provide a kind of stator surface mounted doubly salient pole permanent magnet motor, make this electric machine structure simple, firm, have the unloaded back electromotive force of highly approximate square wave (straight trough rotor) or sinusoidal wave (skewed rotor), stronger torque fan-out capability and bigger power density, possess stronger anti-degaussing ability simultaneously, be particularly suitable for driving element as Alternating Current Governor System.
Technical scheme: for solving the problems of the technologies described above, the stator surface mounted doubly salient pole permanent magnet motor of invention comprises stator and rotor, rotor is positioned at the inside of stator, it is characterized in that stator and rotor all are the biconvex electrode structure, and stator is provided with concentrates winding and permanent magnet; Wherein, concentrate each concentrated winding coil of any phase of winding all to be arranged in stator coring groove, and every winding coil of concentrating mutually is that serial or parallel connection connects; Permanent magnet is positioned at the top of stator tooth.Permanent magnet surfaces is mounted on the outer surface of stator tooth towards air gap, and adjacent magnet steel magnetic is opposite.Rotor is straight trough or skewed rotor.Permanent magnet is ferrite or neodymium iron boron type permanent magnetic steel.
Rotor also can be positioned at the outside of stator, becomes outer-rotor structure.
Beneficial effect: because motor of the present invention concentrates winding and permanent magnet all to be located on the stator at armature, rotor only is a magnetic conductive iron, so structure of the present invention is very simple and firm, is particularly suitable for high-speed cruising, and helps improving the cooling condition of this motor;
Owing to adopted concentrated winding mode, can reduce tip lengths, reduce resistance and copper loss as much as possible, also guaranteed the compact conformation of motor, power density is bigger, and efficient is higher;
Because stator armature winding and permanent magnet all place stator, the armature winding magnetic potential magnetizes to permanent magnet or degaussing all is easy to carry out;
Because rotor structure is simple rigid very, the mode that can adopt skewed slot or commentaries on classics to open virtual groove from tooth surface is as required easily improved potential waveform and is reduced cogging torque (location torque), make that the torque pulsation of the type motor is less, be particularly suitable for elaborate servo control field and other formula application scenarios that directly becomes.
In a preferred embodiment of the invention, because rotor is the straight trough rotor, so, guaranteed that the present invention concentrates winding and rotor not under the condition of skewed slot adopting, just can obtain the trapezoidal wave magnetic linkage, highly near the static characteristics such as back electromotive force of square wave, can substitute the common brshless DC motor of present extensive use fully, thereby make the present invention be more suitable for driving element as Alternating Current Governor System.
To sum up, characteristics on this electric machine structure cause it to have that air gap flux density is big, the torque fan-out capability is strong, power density is higher, location torque is less, torque pulsation is low, resistance is less, advantages such as efficient is higher, production process is simple, rotor strong robustness.
Description of drawings
The present invention will be further described below in conjunction with the drawings and specific embodiments.
Fig. 1 is a stator surface mounted doubly salient pole permanent magnet motor composition diagram that adopts stator 6 grooves/rotor 4 utmost points of the technology of the present invention design;
Wherein have: stator 1, permanent magnet 2 is concentrated winding 3, rotor 4, A is first winding coil 311 mutually, and A is second winding coil 312 mutually; B is first winding coil 321, B phase second winding coil 322 mutually; C is first winding coil 331, C phase second winding coil 332 mutually.
Embodiment
Stator surface mounted doubly salient pole permanent magnet motor of the present invention comprises stator and two parts of rotor, can take internal rotor or two kinds of forms of external rotor according to different application scenarios, and stator and rotor all are the biconvex electrode structure, number of stator slots N
sWith rotor with salient pole number of poles P
rMultiple cooperation is arranged, and number of motor phases m can be single-phase, two-phase, three-phase and heterogeneous; Stator is provided with concentrates winding and permanent magnet; Wherein, the concentrated winding of any phase is by (N
s/ m) individual coil is formed, and the m phase coil is adjacent successively to be enclosed within on the stator tooth.Be two layer winding in each stator slot, promptly be placed with the coil turn limit that belongs to different two-phases; (the N that belongs to homophase
s/ m) individual winding coil can be connected/parallel connection/connection in series-parallel connection as required; Each stator tooth posts a permanent magnet towards the outer surface of air gap, and permanent magnet material can be ferrite or neodymium iron boron, and the permanent magnet magnetizing direction is radial magnetizing, N
sN under the individual stator tooth
sThe piece permanent magnet magnetic is alternately opposite.Because this similar in rotor surface mounted type motor, is therefore named it and is " stator surface mounted doubly "; The rotor portion structure is very simple, has not both had permanent magnet and has not also had winding, for folded forming pressed in simple magnetic conductive iron punching.Can be made as straight trough rotor (square wave electromotive force) or skewed rotor (sinusoidal wave electromotive force) according to the electromotive force needs.
Shown in Figure 1, the stator surface mounted doubly salient pole permanent magnet motor of stator 6 grooves of the present invention/rotor 4 utmost points comprises stator core 1 and rotor core 4, rotor 4 is positioned at the inside or the outside of stator 1, stator 1 and rotor 4 all are the biconvex electrode structure, and stator 1 is provided with winding 3 and 6 permanent magnets 2 in the three-phase set.
First winding coil 311 is radially relative with second winding coil 312 mutually to concentrate the A of winding 3, and each winding coil is placed in the stator 1 in the stator salient poles groove, and above-mentioned two winding coils series connection (or in parallel) connects.
First winding coil 321 is radially relative with tertiary winding coil 322 mutually to concentrate the B of winding 3, and each winding coil is placed in the stator 1 in the stator salient poles groove, and above-mentioned two winding coils series connection (or in parallel) connects.
First winding coil 331 is radially relative with tertiary winding coil 332 mutually to concentrate the C of winding 3, and each winding coil is placed in the stator 1 in the stator salient poles groove, and above-mentioned two winding coils series connection (or in parallel) connects.
Permanent magnet 2 is permanent magnetic steels of other types such as ferrite, neodymium iron boron, and stator 1 and field spider 4 can adopt silicon steel punched chip to press folded making.
Claims (5)
1, a kind of stator surface mounted doubly salient pole permanent magnet motor, comprise stator (1) and rotor (4), it is characterized in that rotor (4) is positioned at the inside of stator (1), stator (1) and rotor (4) all are the biconvex electrode structure, and stator (1) is provided with concentrated winding (3) and permanent magnet (2); Wherein, concentrate each concentrated winding coil of any phase of winding (3) all to be arranged in stator (1) core slots, and every winding coil of concentrating mutually is that serial or parallel connection connects; Permanent magnet (2) is positioned at the top of stator (1) tooth.
2, stator surface mounted doubly salient pole permanent magnet motor as claimed in claim 1 is characterized in that, permanent magnet (2) surface mount is at the outer surface of stator (1) flank of tooth to air gap, and adjacent magnet steel magnetic is opposite.
3, stator surface mounted doubly salient pole permanent magnet motor as claimed in claim 1 is characterized in that, rotor (4) is straight trough or skewed rotor.
4, stator surface mounted doubly salient pole permanent magnet motor as claimed in claim 1 is characterized in that, permanent magnet (2) is ferrite or neodymium iron boron type permanent magnetic steel.
5, stator surface mounted doubly salient pole permanent magnet motor as claimed in claim 1 is characterized in that rotor (4) is positioned at the outside of stator (1), becomes outer-rotor structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910184159A CN101662198A (en) | 2009-08-19 | 2009-08-19 | Stator surface mounted doubly salient pole permanent magnet motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN200910184159A CN101662198A (en) | 2009-08-19 | 2009-08-19 | Stator surface mounted doubly salient pole permanent magnet motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101662198A true CN101662198A (en) | 2010-03-03 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200910184159A Pending CN101662198A (en) | 2009-08-19 | 2009-08-19 | Stator surface mounted doubly salient pole permanent magnet motor |
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| CN (1) | CN101662198A (en) |
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102403857A (en) * | 2011-11-17 | 2012-04-04 | 东南大学 | Stator surface-mounted doubly salient permanent-magnet motor with complementary winding magnetic paths |
| CN103248189A (en) * | 2013-05-03 | 2013-08-14 | 东南大学 | Bipolar stator-surface-mounting type permanent magnet motor |
| CN103296798A (en) * | 2013-05-15 | 2013-09-11 | 东南大学 | Stator surface-mounted type doubly salient permanent magnet motor with double-speed windings |
| CN103997174A (en) * | 2014-06-11 | 2014-08-20 | 东南大学 | Rotor salient pole type hybrid excitation motor based on magnetic gear |
| CN104283394A (en) * | 2014-10-20 | 2015-01-14 | 上海电机学院 | Surface-mounted-type brushless direct current motor rotor for restraining permanent magnet demagnetization |
| CN104319918A (en) * | 2014-10-28 | 2015-01-28 | 江苏交科能源科技发展有限公司 | Magnetic flux switching type stator permanent magnet double-salient-pole motor with V-shaped or U-shaped permanent magnets |
| CN104578491A (en) * | 2014-12-31 | 2015-04-29 | 南京航空航天大学 | Sinusoidal doubly-salient motor with trapezoid rotor tooth structure and design method of sinusoidal doubly-salient motor |
| CN104883016A (en) * | 2015-05-08 | 2015-09-02 | 江苏大学 | Double-stator magnetic field modulation permanent magnet motor |
| CN104319918B (en) * | 2014-10-28 | 2017-01-04 | 江苏交科能源科技发展有限公司 | A kind of stator permanent magnet V-arrangement or U-shaped permanent magnet Magneticflux-switching type double salient-pole electric machine |
| CN106849582A (en) * | 2017-03-20 | 2017-06-13 | 山东理工大学 | A kind of body-sensing car permanent magnetism wheel hub motor |
| CN109361276A (en) * | 2018-11-05 | 2019-02-19 | 赣州诚正电机有限公司 | A kind of brushless rimless rare-earth permanent-magnet electric machine |
| CN111224478A (en) * | 2020-02-17 | 2020-06-02 | 南京航空航天大学 | Permanent magnet pole-cutting flux reversal motor |
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2009
- 2009-08-19 CN CN200910184159A patent/CN101662198A/en active Pending
Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102403857A (en) * | 2011-11-17 | 2012-04-04 | 东南大学 | Stator surface-mounted doubly salient permanent-magnet motor with complementary winding magnetic paths |
| CN103248189A (en) * | 2013-05-03 | 2013-08-14 | 东南大学 | Bipolar stator-surface-mounting type permanent magnet motor |
| CN103296798A (en) * | 2013-05-15 | 2013-09-11 | 东南大学 | Stator surface-mounted type doubly salient permanent magnet motor with double-speed windings |
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