CN103066722B - High speed switch reluctance motor rotor with soft magnetic materials - Google Patents
High speed switch reluctance motor rotor with soft magnetic materials Download PDFInfo
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- CN103066722B CN103066722B CN201210538904.0A CN201210538904A CN103066722B CN 103066722 B CN103066722 B CN 103066722B CN 201210538904 A CN201210538904 A CN 201210538904A CN 103066722 B CN103066722 B CN 103066722B
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- rotor
- soft magnetic
- magnetic materials
- salient pole
- high speed
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- 239000000696 magnetic material Substances 0.000 title claims abstract description 56
- 230000035699 permeability Effects 0.000 claims description 13
- 239000002245 particle Substances 0.000 claims description 5
- 238000003475 lamination Methods 0.000 claims description 4
- 229910000859 α-Fe Inorganic materials 0.000 claims description 3
- 229910000990 Ni alloy Inorganic materials 0.000 claims 1
- 230000004907 flux Effects 0.000 abstract description 9
- 230000008859 change Effects 0.000 description 12
- 230000010349 pulsation Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000002093 peripheral effect Effects 0.000 description 4
- 229910000976 Electrical steel Inorganic materials 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004080 punching Methods 0.000 description 3
- 229910001030 Iron–nickel alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000008187 granular material Substances 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 1
- 238000010835 comparative analysis Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004088 simulation Methods 0.000 description 1
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- Synchronous Machinery (AREA)
Abstract
The invention discloses a high speed switch reluctance motor rotor with soft magnetic materials. The high speed switch reluctance motor rotor with the soft magnetic materials comprises a shaft, rotor salient poles and a rotor yoke. Two symmetrical salient pole grooves formed by two symmetrical grooves are respectively formed in the rotor salient poles and provided with soft magnetic materials occupying 40-50 percent of the salient pole grooves. The high speed switch reluctance motor rotor with the of the soft magnetic materials is capable of increasing torque output through influence of the oft magnetic materials to magnetic conductance and magnetic flux changes at air gap of the edge of the salient poles, using strong centrifugal force to keep the soft magnetic materials inside half of the grooves through the rotor structure during high speed operation of the motor, enabling the soft magnetic materials to be automatically changed at the salient poles along with the rotation of the motor and achieving duel-direction self-starting.
Description
Technical field
The invention belongs to technical field of motors, relating to is a kind of High speed SRM rotor with soft magnetic materials.
Background technology
Switched reluctance machines is different from traditional AC/DC motor, and its main operational principle is: follow " magnetic resistance minimum principle ", relies on the magnetic resistance of different rotor position and inductance change to produce electromagnetic torque.Motor body has double-salient-pole design feature, can be made the reluctance motor of two-phase, three-phase, four phases and the higher number of phases according to the difference of rotor salient pole number, and two-phase 4/2 pole, switched reluctance machines are more suitable for being applied at a high speed and ultrahigh speed drives field.
Compare with other types high-speed electric expreess locomotive, High speed SRM has the distinguishing features such as structure simple rigid, reliability is high, fault-tolerant ability is strong, speed adjusting performance is excellent, is applicable to very much being applied to high-speed driving field.Due to the reluctance motor that two-phase 4/2 pole, switched reluctance machines are rotor with salient pole minimum number, and there is the simplest peripheral control unit structure, make it more easily realize at a high speed and ultrahigh speed operation.But the rotor structure of existing two-phase 4/2 pole, switched reluctance machines does not all have two-way self-startup ability, and there is comparatively outstanding torque pulsation problem, limit its range of application.
Summary of the invention
The problem that the present invention solves is to provide a kind of High speed SRM rotor with soft magnetic materials, adopts this rotor can realize two-way self-starting, the torque ripple reduction of two-phase induction motor.
The present invention is achieved through the following technical solutions:
A kind of High speed SRM rotor with soft magnetic materials, comprise axle, rotor with salient pole and rotor yoke, two rotor with salient pole are respectively offered a salient pole groove, two salient pole grooves are symmetrical, salient pole groove is made up of two symmetrical grooves, arranges the soft magnetic materials of its volume 40 ~ 50% in salient pole groove.
When rotor high-speed runs, centrifugal force is utilized to make soft magnetic materials remain in a groove of salient pole groove; When motor reversely rotates, soft magnetic materials changes position with centrifugal force direction, remains in another groove of salient pole groove.
Described soft magnetic materials is the soft magnetic materials particle of high magnetic permeability.
The soft magnetic materials particle of described high magnetic permeability is as the magnetically soft alloy material of high magnetic permeability, the soft magnetic ferrite of high magnetic permeability or iron-nickel alloy etc.
Described magnetic conductance and the flux change being affected rotor with salient pole peripheral air gap position by soft magnetic materials, is increased torque and exports.
The circumferential size of described salient pole groove is not less than the difference of rotor and stator salient poles radian.
The cross section of described salient pole groove is circular arc, and there is certain deviation at the center of the cylindrical camber line of the center of circle of its cylindrical camber line and rotor with salient pole (2), and departure is that two arc radius of 1/2.5 ~ 1/2 times are poor.
Described when being with the High speed SRM rotor of soft magnetic materials to carry out lamination assembling, the salient pole groove end cap seal of the rotor at its most two ends; Or salient pole groove do not opened by the rotor at most two ends.
Compared with prior art, the present invention has following useful technique effect:
Within the scope of rotor salient pole overlapping region, the air-gap permeance between traditional High speed SRM rotor is substantially constant or change is very little, causes the electromagnetic torque of generation very little, forms torque dead-band.To make it have wider current lead-through region, namely realizing the self-starting of any rotor-position, just must increase the flux change of rotor salient pole overlapping positions as far as possible, export to increase torque.
The rotor structure of existing improvement increases the air-gap permeance change of rotor overlapping region mostly by changing rotor with salient pole shape, although can play a role, be difficult to realize the forward and reverse symmetrical operation of motor, and do not have two-way self-startup ability.
And the High speed SRM rotor of band soft magnetic materials provided by the invention, offer two symmetrical salient pole grooves at rotor with salient pole position, the high magnetic permeability soft magnetic materials particle of about 1/2nd volumes is full of in salient pole groove, soft magnetic materials has the advantages such as magnetic conductivity is high, eddy current effect is little, coordinate with ordinary silicon steel disc and utilize, the effect in position changing magnetic flux path and size can be realized.Affected magnetic conductance and the flux change at rotor with salient pole peripheral air gap position like this by soft magnetic materials, and then increase torque output.Meanwhile, motor at high-speed cruising time, this rotor structure can utilize strong centrifugal force to make soft magnetic materials remain in half groove, and when motor reversely rotates, soft magnetic materials changes position with centrifugal force direction, remains in another half groove.Therefore, the position of soft magnetic materials on rotor with salient pole is changed automatically with motor steering change, realizes two-way self-startup ability.
The High speed SRM rotor of band soft magnetic materials provided by the invention does not change salient pole excircle dimension, therefore can not affect other electromagnetic parameter, as pole embrace etc., thus can not reduce average Driving Torque.When after motor stator winding galvanization, air-gap field can be produced, because rotor with salient pole position exists three kinds of materials of different magnetic conductivity: air, silicon steel material, high magnetic permeability soft magnetic materials, make to be engraved in change during the air-gap permeance when rotor salient pole is overlapping, thus constantly produce torque, such current lead-through scope can expand thereupon, improves the lower limit of torque profile simultaneously to a certain extent, reduces torque pulsation.
Use the High speed SRM of rotor provided by the invention just can realize two-way self-startup ability under two-phase, 4/2 electrode structure, and can Driving Torque be increased, improve operational efficiency, can torque pulsation be reduced simultaneously, reduce electric and magnetic oscillation and noise.This characteristic can increase range of motor speeds, more easily realizes low noise and ultrahigh speed operation, is very suitable for high-speed electric main shaft processing and centrifugal compressor motor.
Use rotor structure provided by the invention greatly can simplify controller architecture, reduce the cost of control system.
Accompanying drawing explanation
Fig. 1 is rotor punching structure schematic diagram when being with the High speed SRM of soft magnetic materials to be rotated counterclockwise;
Fig. 2 is rotor punching structure schematic diagram when being with the High speed SRM of soft magnetic materials to turn clockwise;
Fig. 3 is the High speed SRM rotor assembling schematic diagram of band soft magnetic materials.
Its, 1 is axle, and 2 is rotor with salient pole, and 3 is salient pole groove, and 4 is soft magnetic materials, and 5 is rotor yoke.
Fig. 4 is the comparative analysis result figure of air gap magnetic density waveform;
Fig. 5 is the torque profile analysis result figure that motor is rotated counterclockwise;
Fig. 6 is the torque profile analysis result figure that motor turns clockwise.
Detailed description of the invention
Below in conjunction with specific embodiment, the present invention is described in further detail, and the explanation of the invention is not limited.
See Fig. 1, Fig. 2 and Fig. 3, a kind of High speed SRM rotor with soft magnetic materials, comprise axle 1, rotor with salient pole 2 and rotor yoke 5, two rotor with salient pole 2 are respectively offered a salient pole groove 3, two salient pole grooves 3 symmetrical (relative axle 1 is symmetrical), salient pole groove 3 is made up of two symmetrical grooves, arranges the soft magnetic materials 4 of its volume 40 ~ 50% in salient pole groove 3.
Like this, when rotor high-speed runs, centrifugal force is utilized to make soft magnetic materials remain in a groove of salient pole groove 3; When motor reversely rotates, soft magnetic materials changes position with centrifugal force direction, remains in another groove of salient pole groove 3.
Concrete, described soft magnetic materials 4 is the soft magnetic materials particle (as the magnetically soft alloy material of high magnetic permeability, the soft magnetic ferrite of high magnetic permeability or iron-nickel alloy etc.) of high magnetic permeability, by magnetic conductance and the flux change at soft magnetic materials shadow 4 sound rotor with salient pole 2 peripheral air gap position, increase torque and export.
Concrete, do not change the excircle dimension of existing rotor with salient pole 2, the circumferential size of salient pole groove 3 is not less than the difference of rotor and stator salient poles radian;
The cross section arc of described salient pole groove 3, be circular arc further, there is certain deviation at the center of the center of circle of its cylindrical camber line and the cylindrical camber line of rotor with salient pole 2, and departure is that two arc radius of 1/2.5 ~ 1/2 times are poor.
When after motor stator winding galvanization, air-gap field can be produced, because rotor with salient pole position exists three kinds of materials of different magnetic conductivity: air, silicon steel material, high magnetic permeability soft magnetic materials, make to be engraved in change during the air-gap permeance when rotor salient pole is overlapping, thus constantly produce torque, such current lead-through scope can expand thereupon, improves the lower limit of torque profile simultaneously to a certain extent, reduces torque pulsation.
And when being with the High speed SRM rotor of soft magnetic materials to carry out lamination assembling, salient pole groove 3 end cap seal of the rotor at its most two ends; Or the rotor at most two ends does not open salient pole groove 3, in order to avoid soft magnetic granules material leaks outside.
The assembling of High speed SRM rotor is as follows:
After the rotor core laminations having offered salient pole groove is carried out surface insulation process, iron core is pressed into after closed assembly, in deep-slotted chip breaker, fill a certain amount of soft magnetic granules, the rotor punching finally end two panels being offered salient pole groove carries out closed assembly, namely completes rotor assembling.
The rotor laminated is loaded in respective switch reluctance motor stator, namely completes the assembling of motor.The two-phase induction motor rotating speed of the High speed SRM rotor application assembled is high, have two-way self-startup ability, and torque pulsation is little, controller architecture is simple, and easy care, cost is low.
By Finite Element Method, numerical simulation calculating is carried out to assembled motor model.Obtain with aforementioned in consistent effect.Specific as follows: Fig. 4 is traditional 4/2 pole, the air gap flux density of High speed SRM compares with the air gap flux density of the motor adopting rotor of the present invention to assemble, and can find out, motor gas-gap magnetic flux density waveforms of the present invention has had very large improvement.
Comparing of the forward and backward torque profile of motor that Fig. 5, Fig. 6 are respectively traditional 4/2 pole, High speed SRM rotates forward, the torque profile of reversion assembles with rotor of the present invention, easily find out: when the motor of rotor assembling of the present invention rotates forward, average torque exports amid a sharp increase, and torque pulsation is less; During reversion, there is torque dead-band in conventional motors; There is not torque dead-band in the motor of rotor assembling of the present invention, and torque pulsation is less.
Claims (7)
1. the High speed SRM rotor with soft magnetic materials, it is characterized in that, comprise axle (1), rotor with salient pole (2) and rotor yoke (5), two rotor with salient pole (2) are respectively offered a salient pole groove (3), two salient pole grooves (3) are symmetrical, salient pole groove (3) is made up of two symmetrical grooves, arranges the soft magnetic materials (4) of its volume 40 ~ 50% in salient pole groove (3);
The cross section of described salient pole groove (3) is circular arc, the radius of its cylindrical camber line is less than the radius of the external arc of rotor with salient pole (2), and there is certain deviation at the center of the cylindrical camber line of the center of circle of salient pole groove (3) circular arc and rotor with salient pole (2), departure is that two arc radius of 1/2.5 ~ 1/2 times are poor.
2. the High speed SRM rotor of band soft magnetic materials as claimed in claim 1, is characterized in that, when rotor high-speed runs, utilize centrifugal force to make soft magnetic materials remain in a groove of salient pole groove (3); When motor reversely rotates, soft magnetic materials changes position with centrifugal force direction, remains in another groove of salient pole groove (3).
3. the High speed SRM rotor of band soft magnetic materials as claimed in claim 1, is characterized in that, the soft magnetic materials particle that described soft magnetic materials (4) is high magnetic permeability.
4. the High speed SRM rotor of band soft magnetic materials as claimed in claim 3, is characterized in that, the soft magnetic ferrite that described soft magnetic materials (4) is high magnetic permeability or the soft magnet nickel alloy of high magnetic permeability.
5. the High speed SRM rotor of band soft magnetic materials as claimed in claim 1, it is characterized in that, the circumferential size of described salient pole groove (3) is not less than the difference of rotor and stator salient poles radian.
6. the High speed SRM rotor of band soft magnetic materials as claimed in claim 1, is characterized in that, the cross section arc of described salient pole groove (3).
7. the High speed SRM rotor of band soft magnetic materials as claimed in claim 1, it is characterized in that, when being with the High speed SRM rotor of soft magnetic materials to carry out lamination assembling, salient pole groove (3) end cap seal of the rotor at its most two ends; Or salient pole groove (3) do not opened by the rotor at most two ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210538904.0A CN103066722B (en) | 2012-12-13 | 2012-12-13 | High speed switch reluctance motor rotor with soft magnetic materials |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210538904.0A CN103066722B (en) | 2012-12-13 | 2012-12-13 | High speed switch reluctance motor rotor with soft magnetic materials |
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| Publication Number | Publication Date |
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| CN103066722A CN103066722A (en) | 2013-04-24 |
| CN103066722B true CN103066722B (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210538904.0A Expired - Fee Related CN103066722B (en) | 2012-12-13 | 2012-12-13 | High speed switch reluctance motor rotor with soft magnetic materials |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106059143A (en) * | 2016-07-07 | 2016-10-26 | 洛阳中方实业有限公司 | Rotor structure of multi-coil brushless motor |
| CN107947405A (en) * | 2016-10-13 | 2018-04-20 | 华晨汽车集团控股有限公司 | A kind of T-shaped 4/2 structure switch magnetic resistance motor |
| CN109038872B (en) * | 2018-08-31 | 2019-10-01 | 南京埃克锐特机电科技有限公司 | A kind of cylindrical type rotor High speed SRM |
| CN110022012A (en) * | 2019-04-28 | 2019-07-16 | 江苏优斯特机电科技有限公司 | Ultrahigh speed rotor structure of switching reluctance dynamo |
| CN112180450B (en) * | 2020-09-22 | 2021-07-13 | 西安交通大学 | Three-dimensional reconstruction and imaging method of direct current cable based on magnetic field measurement |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0965591A (en) * | 1995-08-24 | 1997-03-07 | Toyota Motor Corp | Permanent magnet motor |
| CN1252642A (en) * | 1999-11-19 | 2000-05-10 | 南海汇泉科技工业园有限公司 | Permanent magnet motor with weak magnetism speed expansion |
| CN2622921Y (en) * | 2003-04-09 | 2004-06-30 | 朱正风 | Permanent-magnet bias reluctance machine |
| CN1822474A (en) * | 2006-03-24 | 2006-08-23 | 哈尔滨工业大学 | Permanent magnet motor rotor capable of automatic weaking magnet following rotation speed |
| CN101667757A (en) * | 2009-09-29 | 2010-03-10 | 河北工业大学 | Rotor structure of switched reluctance motor for reducing vibration and noise |
| CN101783536A (en) * | 2009-10-22 | 2010-07-21 | 上海海事大学 | Automatic field-weakening method for built-in permanent magnet synchronous motor |
| CN102412688A (en) * | 2010-09-25 | 2012-04-11 | 滨州市博仕杰新能源科技开发有限公司 | High-efficiency energy-saving motor |
-
2012
- 2012-12-13 CN CN201210538904.0A patent/CN103066722B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0965591A (en) * | 1995-08-24 | 1997-03-07 | Toyota Motor Corp | Permanent magnet motor |
| CN1252642A (en) * | 1999-11-19 | 2000-05-10 | 南海汇泉科技工业园有限公司 | Permanent magnet motor with weak magnetism speed expansion |
| CN2622921Y (en) * | 2003-04-09 | 2004-06-30 | 朱正风 | Permanent-magnet bias reluctance machine |
| CN1822474A (en) * | 2006-03-24 | 2006-08-23 | 哈尔滨工业大学 | Permanent magnet motor rotor capable of automatic weaking magnet following rotation speed |
| CN101667757A (en) * | 2009-09-29 | 2010-03-10 | 河北工业大学 | Rotor structure of switched reluctance motor for reducing vibration and noise |
| CN101783536A (en) * | 2009-10-22 | 2010-07-21 | 上海海事大学 | Automatic field-weakening method for built-in permanent magnet synchronous motor |
| CN102412688A (en) * | 2010-09-25 | 2012-04-11 | 滨州市博仕杰新能源科技开发有限公司 | High-efficiency energy-saving motor |
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| CN103066722A (en) | 2013-04-24 |
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