CN104734385A - Rotor structure of high-speed permanent-magnet synchronous motor - Google Patents
Rotor structure of high-speed permanent-magnet synchronous motor Download PDFInfo
- Publication number
- CN104734385A CN104734385A CN201510194713.0A CN201510194713A CN104734385A CN 104734385 A CN104734385 A CN 104734385A CN 201510194713 A CN201510194713 A CN 201510194713A CN 104734385 A CN104734385 A CN 104734385A
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- magnet
- synchronous motor
- speed permanent
- rotor structure
- pole
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Links
- 230000001360 synchronised effect Effects 0.000 title claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 11
- 230000004907 flux Effects 0.000 claims abstract description 9
- 229920000049 Carbon (fiber) Polymers 0.000 claims abstract description 5
- 239000004917 carbon fiber Substances 0.000 claims abstract description 5
- 239000002131 composite material Substances 0.000 claims abstract description 5
- 238000010276 construction Methods 0.000 claims description 6
- 239000000696 magnetic material Substances 0.000 claims description 5
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 4
- 230000035699 permeability Effects 0.000 claims description 4
- 239000011159 matrix material Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000000034 method Methods 0.000 abstract description 9
- 230000008901 benefit Effects 0.000 abstract description 2
- 239000004020 conductor Substances 0.000 abstract 2
- 230000001681 protective effect Effects 0.000 abstract 2
- 230000005389 magnetism Effects 0.000 abstract 1
- BGPVFRJUHWVFKM-UHFFFAOYSA-N N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] Chemical compound N1=C2C=CC=CC2=[N+]([O-])C1(CC1)CCC21N=C1C=CC=CC1=[N+]2[O-] BGPVFRJUHWVFKM-UHFFFAOYSA-N 0.000 description 7
- 230000005284 excitation Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 3
- KPLQYGBQNPPQGA-UHFFFAOYSA-N cobalt samarium Chemical compound [Co].[Sm] KPLQYGBQNPPQGA-UHFFFAOYSA-N 0.000 description 2
- 230000005415 magnetization Effects 0.000 description 2
- 229910000938 samarium–cobalt magnet Inorganic materials 0.000 description 2
- 230000003313 weakening effect Effects 0.000 description 2
- 239000000956 alloy Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000084 colloidal system Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The invention discloses a rotor structure of a high-speed permanent-magnet synchronous motor. The rotor structure comprises a rotating shaft, end plates, a protective sleeve and magnets. Grooves are formed in the outer surface of a middle segment of the rotating shaft made of magnetism conducting materials, positioning keys are mounted in the grooves to fix the magnets, the end plates made of non-magnetism-conducting materials are fixed on two sides of the middle segment of the rotating shaft, the magnets include permanent magnets made of two different materials, and the protective sleeve is made of composite materials with carbon fibers serving as a base and is bound on the outer surfaces of the magnets. Compared with a surface-mounted rotor magnetic circuit structure adopted by a traditional high-speed permanent-magnet synchronous motor, the rotor structure of the high-speed permanent-magnet synchronous motor has the advantages that the rotor magnetic circuit structure, air-gap magnetic flux density waveforms, manufacturing techniques and the like are optimized to a great degree, motor cost can be reduced, and the rotor structure is suitable for high-speed permanent-magnet synchronous motors with high requirements on motor performance and with the characteristics of a small number of pole pairs, large-external-diameter rotors and the like.
Description
Technical field
The invention belongs to technical field of motors, be specifically related to a kind of rotor structure being specially adapted to the high-speed permanent magnetic synchronous motor that number of pole-pairs is less or rotor diameter is larger.
Background technology
High-speed permanent magnetic synchronous motor adopts surface-type rotor magnetic circuit structural usually, has that technique is simple, the advantage of low cost of manufacture.
High-speed permanent magnetic synchronous motor General Requirements air-gap field is tending towards sinusoidal wave, when number of pole-pairs is less or size is larger, by the restriction of magnet processing and manufacturing size, make rotor often extremely under permanent magnet need carry out piecemeal, and splice after magnetizing respectively, cause every extremely under air gap flux density present the characteristic of square wave, the back-emf of generation also levels off to square wave.Under the supply power mode of sine wave, produce a large amount of high order harmonic component because back-emf and power supply do not mate, cause electric current to distort, the efficiency step-down of motor.
If extremely optimize air gap magnetic density waveform by cutting, then need the gap fill structure material in magnet, technique is comparatively complicated, also have impact on the heat radiation of rotor.
Summary of the invention
The object of patent of the present invention is the shortcoming and defect overcoming prior art, and propose one and have technique simply, what efficiency was high is specially adapted to the high-speed permanent magnetic synchronous motor that number of pole-pairs is less or rotor diameter is larger.
The technical solution adopted for the present invention to solve the technical problems is: a kind of rotor structure of high-speed permanent magnetic synchronous motor, comprise rotating shaft, end clamp plate, sheath and magnet, described rotating shaft adopts permeability magnetic material, the outer surface of rotating shaft interlude offers groove, install positioning key in groove with fixed magnets, described end clamp plate adopts non-magnet_conductible material, is fixed on rotating shaft interlude both sides, described sheath is take carbon fiber as the composite material of matrix, and colligation is at the outer surface of magnet.
The rotor structure of described a kind of high-speed permanent magnetic synchronous motor, its magnet is tile shape structure, and along shaft circumference direction according to N pole and the alternately arrangement of S pole, adjacent N pole and S pole form a pair pole, total number of pole-pairs
.
The rotor structure of described a kind of high-speed permanent magnetic synchronous motor, its magnet forming every pole is made up of the permanent magnet of two kinds of different materials, and what be positioned at pole center is main field magnet, and what be positioned at magnetic pole both sides is secondary field magnet.
The rotor structure of described a kind of high-speed permanent magnetic synchronous motor, the residual flux density of its main field magnet when working temperature higher than secondary field magnet.
The rotor structure of described a kind of high-speed permanent magnetic synchronous motor, the machinery of its main field magnet is across angle
, the machinery of secondary field magnet is across angle
meet
.
The rotor structure of described a kind of high-speed permanent magnetic synchronous motor, its main field magnet adopts en-block construction or is spliced by several piece.
The rotor structure of described a kind of high-speed permanent magnetic synchronous motor, its secondary field magnet adopts en-block construction or is spliced by several piece.
The rotor structure of described a kind of high-speed permanent magnetic synchronous motor, its main field magnet and secondary field magnet are divided into some sections vertically.
The invention has the beneficial effects as follows: by optimizing surface formula rotor structure, adopt the permanent-magnet of different materials, and along the circumferential direction according to certain rule arrangement combination, optimize the air-gap field of permagnetic synchronous motor, high order harmonic component in effective weakening air gap flux density, thus suppress to cause current distortion, the higher harmonic current of hydraulic performance decline, improve motor runnability, simplify rotor manufacture process simultaneously, reduce costs, optimal design for speed permanent magnet synchronous motor rotor structure provides a kind of solution, be more suitable for the surface-type high-speed permanent magnetic synchronous motor that number of pole-pairs is less or rotor diameter is larger.High-speed permanent magnetic synchronous motor with traditional employing surface-type rotor magnetic circuit structural is compared, the present invention has and optimizes largely in rotor magnetic circuit structural, air gap magnetic density waveform, manufacturing process etc., motor cost can be reduced simultaneously, be applicable to requiring higher to motor performance, there is again the high-speed permanent magnetic synchronous motor of the features such as the less and rotor diameter of number of pole-pairs is larger.
Accompanying drawing explanation
Fig. 1 is structural representation of the present invention;
Fig. 2 is rotor schematic cross-section of the present invention;
Fig. 3 is the structural representation of the present invention one specific embodiment;
Fig. 4 is that the present invention specifically executes the load current contrast of example in single excitation and composite excitation two kinds of situations during additional identical sine voltage.
Each Reference numeral is: 1-rotating shaft, 2-end clamp plate, 3-sheath, 4-magnet, 4.1-N extremely under main field magnet, 4.2-N extremely under secondary field magnet, 4.3-S extremely under secondary field magnet, 4.4-S extremely under main field magnet, 5-positioning key, 5.1-flat key, 5.2-screw.
Embodiment
Below in conjunction with accompanying drawing, the present invention is described in further detail.
With reference to Fig. 1, shown in Fig. 2, a kind of rotor structure of high-speed permanent magnetic synchronous motor of disclosure of the invention, comprise rotating shaft 1, end clamp plate 2, sheath 3 and magnet 4, described rotating shaft 1 adopts permeability magnetic material, for rotor provides magnetic circuit, the outer surface of rotating shaft 1 interlude offers groove, positioning key 5 is installed with fixed magnets 4 in groove, positioning key 5 is made up of flat key 5.1 and screw 5.2, locate and transmitting torque for magnet 4, described end clamp plate 2 adopts non-magnet_conductible material, rotating shaft 1 interlude both sides are fixed on by interference fit, for the axial restraint of magnet 4, at outer surface colligation sheath 3 after magnet 4 installs, described sheath 3 is take carbon fiber as the composite material of matrix, the intensity of sheath 3 should meet Structural strength calls when motor rotates, described magnet 4 is tile shape structure, along rotating shaft 1 circumferencial direction according to N pole and the alternately arrangement of S pole, adjacent N pole and S pole form a pair pole, suppose that motor number of pole-pairs is
, total number of pole-pairs
every extremely under magnet 4 be made up of the main field magnet of two kinds of different materials and secondary field magnet, wherein be positioned at pole center for N extremely under main field magnet 4.1 and S extremely under main field magnet 4.4, be symmetrically distributed in magnetic pole both sides for N extremely under secondary field magnet 4.2 and S extremely under secondary field magnet 4.3, and be along the circumferential direction covered with, the two all can be divided into polylith, and difference parallel magnetization, the machinery of described main field magnet 4.1 and 4.4 is across angle
, the machinery of secondary field magnet 4.2 and 4.3 is across angle
meet
, the residual flux density of described main field magnet when working temperature higher than secondary field magnet.Because have employed the main field magnet of different materials and secondary field magnet, and distribute according to certain rules, air gap flux density is made to level off to sine wave, and the square wave field that the magnet being different from conventional surface formula rotor produces, thus the high order harmonic component effectively weakened in back-emf, inhibit the generation of higher harmonic current, improve the performance of motor.Because main field magnet and secondary field magnet all can adopt partitioned organization, avoid the processing and manufacturing problem that magnet size brings more greatly, improve technique exploitativeness; In addition, due to the magnet that secondary field magnet adopts magnetic property relatively weak, the general relative moderate of its price, and the process for filling colloid into cut in pole permanent-magnet synchronous machine can be avoided, therefore significantly can reduce the cost of motor.
The present invention is the permanent magnetic material by adopting different magnetic property, and along the circumferential direction according to certain rule arrangement combination, optimize the air-gap field of permagnetic synchronous motor, high order harmonic component in effective weakening air gap flux density, improve motor runnability, simplify rotor manufacture process simultaneously, reduce costs, optimal design for speed permanent magnet synchronous motor rotor structure provides a kind of solution, is more suitable for the surface-type high-speed permanent magnetic synchronous motor that number of pole-pairs is less or rotor diameter is larger.High-speed permanent magnetic synchronous motor with traditional employing surface-type rotor magnetic circuit structural is compared, the present invention has and optimizes largely in rotor magnetic circuit structural, air gap magnetic density waveform, manufacturing process etc., motor cost can be reduced simultaneously, be applicable to requiring higher to motor performance, there is again the high-speed permanent magnetic synchronous motor of the features such as the less and rotor diameter of number of pole-pairs is larger.
Because rotor structure of the present invention eliminates rotor core, magnet 4 is directly fixed in rotating shaft 1, provides rotor magnetic circuit by rotating shaft 1, and rotating shaft 1 is formed by permeability magnetic material manufacture, outside adopts carbon fiber colligation, improves structural strength, can effectively reduce electric air gap thickness simultaneously.The current harmonics elimination of the surface-type high-speed permanent magnetic synchronous motor that the present invention is less to number of pole-pairs or rotor diameter is larger is obvious, can significantly improve the runnability of motor, and reduce the cost of motor, improve technique exploitativeness.
In addition, the residual flux density of described main field magnet when working temperature higher than secondary field magnet, described main field magnet adopts en-block construction or is spliced by several piece, described secondary field magnet is also adopt en-block construction or be spliced by several piece, and described main field magnet and secondary field magnet are divided into some sections vertically.
As specific embodiments of the invention,
,
,
main field magnet adopts samarium cobalt permanent magnet body, secondary field magnet adopts ferrite permanent magnet, main field magnet and secondary field magnet each point two pieces, and difference parallel magnetization, each magnet is directly bonded in rotating shaft, cancels rotor core, rotating shaft is processed by the alloy material of magnetic conduction, and its structural representation as shown in Figure 3.
When Fig. 4 gives and keeps identical additional sine voltage and size, the load current contrast during excitation mode adopting single samarium cobalt permanent magnet body excitation and this example to propose, the high order harmonic component in visible electric current is effectively suppressed and weakens.
Principle of the present invention is: by adopting the main field magnet of different materials and secondary field magnet, and the locus arrangement of certain rule, every extremely lower air-gap field is distributed and presents the feature of trapezoidal wave, and the content of wherein first-harmonic and harmonic wave is optimized, higher harmonic content in air-gap field is greatly reduced than square wave, corresponding back-emf and electric current all present approximate sine wave, thus reduce harmonic current and harmonic loss, improve the efficiency of motor.
Above-described embodiment is illustrative principle of the present invention and effect thereof only; and the embodiment that part is used, for the person of ordinary skill of the art, without departing from the concept of the premise of the invention; can also make some distortion and improvement, these all belong to protection scope of the present invention.
Claims (8)
1. the rotor structure of a high-speed permanent magnetic synchronous motor, comprise rotating shaft (1), end clamp plate (2), sheath (3) and magnet (4), it is characterized in that: described rotating shaft (1) adopts permeability magnetic material, the outer surface of rotating shaft (1) interlude offers groove, positioning key (5) is installed with fixed magnets (4) in groove, described end clamp plate (2) adopts non-magnet_conductible material, be fixed on rotating shaft (1) interlude both sides, described sheath (3) is take carbon fiber as the composite material of matrix, and colligation is at the outer surface of magnet (4).
2. the rotor structure of a kind of high-speed permanent magnetic synchronous motor according to claim 1, it is characterized in that, described magnet (4) is tile shape structure, along rotating shaft (1) circumferencial direction according to N pole and the alternately arrangement of S pole, adjacent N pole and S pole form a pair pole, total number of pole-pairs
.
3. the rotor structure of a kind of high-speed permanent magnetic synchronous motor according to claim 2, it is characterized in that, the magnet (4) of the every pole of described composition is made up of the permanent magnet of two kinds of different materials, what be positioned at pole center is main field magnet (4.1,4.4), what be positioned at magnetic pole both sides is secondary field magnet (4.2,4.3).
4. the rotor structure of a kind of high-speed permanent magnetic synchronous motor according to claim 3, is characterized in that, the residual flux density of described main field magnet (4.1,4.4) when working temperature higher than secondary field magnet (4.2,4.3).
5. the rotor structure of a kind of high-speed permanent magnetic synchronous motor according to claim 4, is characterized in that, the machinery of described main field magnet (4.1,4.4) is across angle
, the machinery of secondary field magnet (4.2,4.3) is across angle
meet
.
6. the rotor structure of a kind of high-speed permanent magnetic synchronous motor according to claim 5, is characterized in that: described main field magnet (4.1,4.4) adopts en-block construction or is spliced by several piece.
7. the rotor structure of a kind of high-speed permanent magnetic synchronous motor according to claim 5, is characterized in that: described secondary field magnet (4.2,4.3) adopts en-block construction or is spliced by several piece.
8. the rotor structure of a kind of high-speed permanent magnetic synchronous motor according to claim 5 or 6 or 7, is characterized in that, described main field magnet (4.1,4.4) and secondary field magnet (4.2,4.3) are divided into some sections vertically.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510194713.0A CN104734385B (en) | 2015-04-23 | 2015-04-23 | A kind of rotor structure of high-speed permanent magnetic synchronous motor |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510194713.0A CN104734385B (en) | 2015-04-23 | 2015-04-23 | A kind of rotor structure of high-speed permanent magnetic synchronous motor |
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| Publication Number | Publication Date |
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| CN104734385A true CN104734385A (en) | 2015-06-24 |
| CN104734385B CN104734385B (en) | 2017-09-29 |
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| CN201510194713.0A Active CN104734385B (en) | 2015-04-23 | 2015-04-23 | A kind of rotor structure of high-speed permanent magnetic synchronous motor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811614A (en) * | 2016-03-17 | 2016-07-27 | 重庆大学 | Rotor structure for high speed permanent magnet synchronous machine |
| CN111371218A (en) * | 2020-04-08 | 2020-07-03 | 江苏毅合捷汽车科技股份有限公司 | Rotor and motor |
| CN114696482A (en) * | 2022-04-15 | 2022-07-01 | 德阳市东方恒运电机有限公司 | A hybrid permanent magnet rotor |
| CN119921495A (en) * | 2025-04-02 | 2025-05-02 | 浙江大学 | Permanent Magnet Motor |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101572467A (en) * | 2009-06-16 | 2009-11-04 | 哈尔滨工业大学 | Highly efficient high-speed permanent magnetic synchronous motor |
| CN102510147A (en) * | 2011-11-15 | 2012-06-20 | 浙江省三门县飞达电器有限公司 | Rotor topological structure for permanent-magnet servomotor |
| CN203933192U (en) * | 2014-06-20 | 2014-11-05 | 广东梅雁吉祥水电股份有限公司 | A kind of rotor |
| CN104167844A (en) * | 2014-09-05 | 2014-11-26 | 东南大学 | Mixed asymmetric permanent magnet rotor |
-
2015
- 2015-04-23 CN CN201510194713.0A patent/CN104734385B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101572467A (en) * | 2009-06-16 | 2009-11-04 | 哈尔滨工业大学 | Highly efficient high-speed permanent magnetic synchronous motor |
| CN102510147A (en) * | 2011-11-15 | 2012-06-20 | 浙江省三门县飞达电器有限公司 | Rotor topological structure for permanent-magnet servomotor |
| CN203933192U (en) * | 2014-06-20 | 2014-11-05 | 广东梅雁吉祥水电股份有限公司 | A kind of rotor |
| CN104167844A (en) * | 2014-09-05 | 2014-11-26 | 东南大学 | Mixed asymmetric permanent magnet rotor |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105811614A (en) * | 2016-03-17 | 2016-07-27 | 重庆大学 | Rotor structure for high speed permanent magnet synchronous machine |
| CN111371218A (en) * | 2020-04-08 | 2020-07-03 | 江苏毅合捷汽车科技股份有限公司 | Rotor and motor |
| CN114696482A (en) * | 2022-04-15 | 2022-07-01 | 德阳市东方恒运电机有限公司 | A hybrid permanent magnet rotor |
| CN119921495A (en) * | 2025-04-02 | 2025-05-02 | 浙江大学 | Permanent Magnet Motor |
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| Publication number | Publication date |
|---|---|
| CN104734385B (en) | 2017-09-29 |
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