CN104734385B - A kind of rotor structure of high-speed permanent magnetic synchronous motor - Google Patents
A kind of rotor structure of high-speed permanent magnetic synchronous motor Download PDFInfo
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- CN104734385B CN104734385B CN201510194713.0A CN201510194713A CN104734385B CN 104734385 B CN104734385 B CN 104734385B CN 201510194713 A CN201510194713 A CN 201510194713A CN 104734385 B CN104734385 B CN 104734385B
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Abstract
The invention discloses a kind of rotor structure of high-speed permanent magnetic synchronous motor, including rotating shaft, end clamp plate, sheath and magnet, described rotating shaft uses permeability magnetic material, the outer surface of rotating shaft interlude offers groove, positioning key is installed in groove to fix magnet, described end clamp plate uses non-magnet_conductible material, it is fixed on rotating shaft interlude both sides, described magnet by two kinds of different materials set of permanent magnets into, described sheath is the composite using carbon fiber as matrix, colligation is in the outer surface of magnet, compared with the high-speed permanent magnetic synchronous motor of traditional use surface-type rotor magnetic circuit structural, the present invention is in rotor magnetic circuit structural, air gap magnetic density waveform, have in terms of manufacturing process and largely optimize, motor cost can be reduced simultaneously, it is adapted to require higher to motor performance, the high-speed permanent magnetic synchronous motor for the features such as there is less number of pole-pairs and larger rotor diameter again.
Description
Technical field
The invention belongs to technical field of motors, and in particular to one kind is particularly suitable for use in that number of pole-pairs is less or rotor diameter is larger
High-speed permanent magnetic synchronous motor rotor structure.
Background technology
High-speed permanent magnetic synchronous motor generally uses surface-type rotor magnetic circuit structural, with technique is simple, manufacturing cost is low
Advantage.
High-speed permanent magnetic synchronous motor typically requires that air-gap field tends to sine wave, when number of pole-pairs is smaller or during larger size,
Limited by magnet processing and manufacturing size so that rotor need to carry out piecemeal per extremely lower permanent magnet, and splicing after magnetizing respectively, lead
Cause to show the characteristic of square wave per the air gap flux density under extremely, the back-emf of generation also levels off to square wave.In the supplier of electricity of sine wave
Under formula, due to back-emf and a large amount of higher hamonic waves of power supply mismatch generation, electric current is caused to be distorted, the efficiency step-down of motor.
If optimizing air gap magnetic density waveform by cutting extremely, the gap fill structure material in magnet, technique are needed
It is complex, it also have impact on the radiating of rotor.
The content of the invention
The shortcoming and defect for aiming to overcome that prior art of patent of the present invention, proposes a kind of simple with technique, effect
Rate it is high be particularly suitable for use in 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 knot of high-speed permanent magnetic synchronous motor
Structure, including rotating shaft, end clamp plate, sheath and magnet, described rotating shaft use permeability magnetic material, and the outer surface of rotating shaft interlude is offered
Positioning key is installed to fix magnet in groove, groove, described end clamp plate uses non-magnet_conductible material, is fixed on rotating shaft interlude both sides,
Described sheath is the composite using carbon fiber as matrix, and colligation is in the outer surface of magnet.
A kind of rotor structure of described high-speed permanent magnetic synchronous motor, its magnet is tile shape structure, along shaft circumference side
It is arranged alternately to according to N poles and S poles, adjacent N poles and S poles constitute a pair of poles, total number of pole-pairs。
A kind of rotor structure of described high-speed permanent magnetic synchronous motor, it constitutes magnet per pole by two kinds of different materials
Permanent magnet is constituted, and is main field magnet positioned at pole center, is secondary field magnet positioned at magnetic pole both sides.
A kind of rotor structure of described high-speed permanent magnetic synchronous motor, the residual flux density of its main field magnet is in operating temperature
When higher than secondary field magnet.
A kind of rotor structure of described high-speed permanent magnetic synchronous motor, the machinery of its main field magnet is across angle, the machinery of secondary field magnet is across angleMeet。
A kind of rotor structure of described high-speed permanent magnetic synchronous motor, its main field magnet is using en-block construction or by several piece
It is spliced.
A kind of rotor structure of described high-speed permanent magnetic synchronous motor, its secondary field magnet is using en-block construction or by several piece
It is spliced.
A kind of rotor structure of described high-speed permanent magnetic synchronous motor, its main field magnet and secondary field magnet divide vertically
For some sections.
The beneficial effects of the invention are as follows：By optimizing surface formula rotor structure, using the permanent-magnet of different materials, and edge
Circumferencial direction is arranged according to certain rule and combined, and is optimized the air-gap field of permagnetic synchronous motor, is effectively weakened in air gap flux density
Higher hamonic wave, so as to suppress to cause the higher harmonic current of current distortion, hydraulic performance decline, improves motor operation performance, while simple
Change rotor manufacture process, reduce cost, a kind of solution is provided for the optimization design of speed permanent magnet synchronous motor rotor structure,
More suitable for the surface-type high-speed permanent magnetic synchronous motor that number of pole-pairs is less or rotor diameter is larger.Turn with traditional use surface-type
The high-speed permanent magnetic synchronous motor of sub- magnetic structure is compared, and the present invention is in rotor magnetic circuit structural, air gap magnetic density waveform, manufacturing process etc.
Aspect, which has, largely to be optimized, while motor cost can be reduced, and is adapted to require higher to motor performance, have again number of pole-pairs compared with
The high-speed permanent magnetic synchronous motor for the features such as few and rotor diameter is larger.
Brief description of the drawings
Fig. 1 is the structural representation of the present invention；
Fig. 2 is the rotor schematic cross-section of the present invention；
Fig. 3 is the structural representation of a specific embodiment of the invention；
Fig. 4 is that the present invention specifically applies example in additional identical sine voltage in the case of two kinds of single excitation and composite excitation
Load current contrast.
Each reference is：1-rotating shaft, 2-end clamp plate, 3-sheath, 4-magnet, 4.1-N extremely under main excitation magnetic
Body, 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-fixed
Position key, 5.1-flat key, 5.2-screw.
Embodiment
The present invention is described in further detail below in conjunction with the accompanying drawings.
Shown in reference picture 1, Fig. 2, a kind of rotor structure of high-speed permanent magnetic synchronous motor of disclosure of the invention, including rotating shaft 1, end
Pressing plate 2, sheath 3 and magnet 4, described rotating shaft 1 use permeability magnetic material, and magnetic circuit, the outer surface of the interlude of rotating shaft 1 are provided for rotor
Offer and positioning key 5 is installed to fix magnet 4 in groove, groove, positioning key 5 is made up of flat key 5.1 and screw 5.2, it is fixed for magnet 4
Position and transmission moment of torsion, described end clamp plate 2 use non-magnet_conductible material, the interlude both sides of rotating shaft 1 are fixed on by interference fit, uses
In the axial restraint of magnet 4, magnet 4 install after in outer surface colligation sheath 3, described sheath 3 is using carbon fiber as base
The composite of body, the intensity of sheath 3 should meet Structural strength calls when motor rotates, and described magnet 4 is tile shape knot
Structure, is arranged alternately along the circumferencial direction of rotating shaft 1 according to N poles and S poles, and adjacent N poles and S poles constitute a pair of poles, it is assumed that motor is extremely right
Number is, total number of pole-pairs, per extremely lower magnet 4 by the main field magnet of two kinds of different materials and pair field magnet group
Into, wherein 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
Polylith, and parallel magnetization respectively are divided into, the machinery of the main field magnet 4.1 and 4.4 is across angle,
The machinery of secondary field magnet 4.2 and 4.3 is across angleMeet, the residual flux density of described main field magnet exists
Higher than secondary field magnet during operating temperature.Because employing the main field magnet and secondary field magnet of different materials, and by a set pattern
Rule distribution so that air gap flux density levels off to sine wave, and different from the square wave field produced by the magnet of conventional surface formula rotor,
So as to effectively weaken the higher hamonic wave in back-emf, it is suppressed that the generation of higher harmonic current, the performance of motor is improved.By
In main field magnet and secondary field magnet it can use partitioned organization, it is to avoid the larger processing and manufacturing brought of magnet size is asked
Topic, improves technique exploitativeness；Further, since secondary field magnet is using the relatively weak magnet of magnetic property, its price is general
Relative moderate, and can avoid cutting the process for filling colloid in pole permanent-magnet synchronous machine, therefore the cost of motor can be greatly reduced.
The present invention is the permanent-magnet material by using different magnetic properties, and along the circumferential direction according to certain rule arrangement group
Close, optimize the air-gap field of permagnetic synchronous motor, effectively weaken the higher hamonic wave in air gap flux density, improve motor operation performance,
Simplify rotor manufacture process simultaneously, reduce cost, a kind of solution is provided for the optimization design of speed permanent magnet synchronous motor rotor structure
Certainly method, more suitable for the surface-type high-speed permanent magnetic synchronous motor that number of pole-pairs is less or rotor diameter is larger.With traditional use
The high-speed permanent magnetic synchronous motor of surface-type rotor magnetic circuit structural is compared, and the present invention is in rotor magnetic circuit structural, air gap magnetic density waveform, system
Make in terms of technique to have and largely optimize, while motor cost can be reduced, be adapted to require higher to motor performance, have again
The less high-speed permanent magnetic synchronous motor with rotor diameter the features such as larger of number of pole-pairs.
Because the rotor structure of the present invention eliminates rotor core, magnet 4 is directly anchored in rotating shaft 1, is provided by rotating shaft 1
Rotor magnetic circuit, and rotating shaft 1 is fabricated by by permeability magnetic material, and outside uses carbon fiber colligation, structural strength is improved, while can
Effectively reduce electric air gap thickness.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
Current harmonics elimination substantially, be remarkably improved the runnability of motor, and reduce the cost of motor, improving technique can implement
Property.
In addition, the residual flux density of the main field magnet is higher than secondary field magnet, described main excitation in operating temperature
Magnet is spliced using en-block construction or by several piece, and described secondary field magnet is also using en-block construction or spliced by several piece
Form, described main field magnet and secondary field magnet are divided into some sections vertically.
As the specific embodiment of the present invention,,,, main field magnet use samarium cobalt permanent magnet body,
Secondary field magnet uses ferrite permanent magnet, main field magnet and secondary each point two pieces of field magnet, and parallel magnetization, each magnetic respectively
Body is directly bonded in rotating shaft, cancels rotor core, and rotating shaft is processed by the alloy material of magnetic conduction, and its structural representation is as schemed
Shown in 3.
When Fig. 4 gives the identical additional sine voltage of holding and size, using single samarium cobalt permanent magnet body excitation and this reality
Load current contrast during the excitation mode that example is proposed, it is seen that the higher hamonic wave in electric current is effectively suppressed and weakened.
The present invention principle be：By using the main field magnet and secondary field magnet of different materials, and certain rule
Locus arrangement, every extremely lower air-gap field is distributed the characteristics of showing trapezoidal wave, and make wherein fundamental wave and harmonic wave
Content is optimized so that the higher harmonic content in air-gap field greatly reduces than square wave, corresponding back-emf and electric current
Approximate sine wave is all showed, so as to reduce the loss of harmonic current harmonic, the efficiency of motor is improved.
The above-described embodiments merely illustrate the principles and effects of the present invention, and the embodiment that part is used, for
For one of ordinary skill in the art, without departing from the concept of the premise of the invention, can also make it is some deformation and
Improve, these belong to protection scope of the present invention.
Claims (4)
1. a kind of rotor structure of high-speed permanent magnetic synchronous motor, including rotating shaft（1）, end clamp plate（2）, sheath（3）And magnet（4）,
It is characterized in that：Described rotating shaft（1）Using permeability magnetic material, rotating shaft（1）The outer surface of interlude, which is offered, installs fixed in groove, groove
Position key（5）To fix magnet（4）, described end clamp plate（2）Using non-magnet_conductible material, rotating shaft is fixed on（1）Interlude both sides, institute
The sheath stated（3）For the composite using carbon fiber as matrix, colligation is in magnet（4）Outer surface；Described magnet（4）For watt
Slab organization, along rotating shaft（1）Circumferencial direction is arranged alternately according to N poles and S poles, and adjacent N poles and S poles constitute a pair of poles, always
Number of pole-pairs；Magnet of the described composition per pole（4）It is made up of the permanent magnet of two kinds of different materials, what it is positioned at pole center is
Main field magnet（4.1,4.4）, it is secondary field magnet positioned at magnetic pole both sides（4.2,4.3）；The main field magnet（4.1,
4.4）Residual flux density in operating temperature higher than secondary field magnet（4.2,4.3）；The main field magnet（4.1,4.4）Machine
Tool is across angle, secondary field magnet（4.2,4.3）Machinery across angleMeet。
2. a kind of rotor structure of high-speed permanent magnetic synchronous motor according to claim 1, it is characterised in that：Described master encourages
Magnetic magnet（4.1,4.4）It is spliced using en-block construction or by several piece.
3. a kind of rotor structure of high-speed permanent magnetic synchronous motor according to claim 1, it is characterised in that：Described pair is encouraged
Magnetic magnet（4.2,4.3）It is spliced using en-block construction or by several piece.
4. the rotor structure of a kind of high-speed permanent magnetic synchronous motor according to claim 1 or 2 or 3, it is characterised in that described
Main field magnet（4.1,4.4）With secondary field magnet（4.2,4.3）It is 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 |
Applications Claiming Priority (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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| Publication Number | Publication Date |
|---|---|
| CN104734385A CN104734385A (en) | 2015-06-24 |
| CN104734385B true 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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Families Citing this family (2)
| 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 |
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 |
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