CN105939087B - A kind of 6 pole of reduction, 9 slot synchronous electric machine torque wave method - Google Patents
A kind of 6 pole of reduction, 9 slot synchronous electric machine torque wave method Download PDFInfo
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- CN105939087B CN105939087B CN201510094682.1A CN201510094682A CN105939087B CN 105939087 B CN105939087 B CN 105939087B CN 201510094682 A CN201510094682 A CN 201510094682A CN 105939087 B CN105939087 B CN 105939087B
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Abstract
The invention belongs to a kind of reduction synchronous electric machine torque wave methods, and in particular to a kind of 6 pole of reduction, 9 slot synchronous electric machine torque wave method.It includes the following steps：Calculate power；Calculate armature internal diameter；It is long to calculate armature core；Select groove profile for trapezoidal mouth fan groove；Calculate rotor collar internal diameter；Calculate rotor magnetic steel internal diameter；) calculate rotor magnetic steel section both ends the most length of the low spot to peak；Calculate rotor magnetic steel length.It is an advantage of the invention that being designed to 6 pole, 9 slot motor stator, rotor structure respectively to reduce winding back emf harmonic wave, to realize the purpose for reducing motor torque fluctuation.
Description
Technical field
The invention belongs to a kind of reduction synchronous electric machine torque wave methods, and in particular to a kind of 6 pole of reduction, 9 slot synchronous motor
Torque ripple method.
Background technology
6 pole, 9 slot motor is a kind of concentratred winding motor, and each coil of concentratred winding motor is wound on a tooth, shortens
Coil perimeter and winding overhang extension elongation reduce copper consumption and reduce copper loss, and then improve electric efficiency.
6 pole, 9 slot motor motor pole number in concentratred winding motor is less, can reduce iron core alternating magnetic field frequency, reduces
Iron loss is particularly suitable for high-speed electric expreess locomotive.And the sulculus that 6 pole, 9 slot motor replaces number more with a small number of purpose large troughs, slot utilization rate
Height improves copper factor.Therefore 6 pole, 9 slot motor is suitble to the synchronous motor of high-speed high-power density.
6 pole, 9 slot motor has the drawback that winding back emf harmonic wave is big, causes the torque ripple of motor big, influences motor
Running stability.
Invention content
The object of the present invention is to provide a kind of 6 pole of reduction, 9 slot synchronous electric machine torque wave methods, it can reduce 6 pole, 9 slot
The torque ripple of synchronous motor.
The invention is realized in this way a kind of 6 pole of reduction, 9 slot synchronous electric machine torque wave method, it includes the following steps：
(1) power P is calculatedi', if motor longtime running,If motor short-term operation,Wherein PNFor motor rated power, η ' is motor prefetching efficiency；
(2) armature internal diameter is calculatedB'δTo prefetch air gap flux density, A'δTo prefetch specific electric load, αiFor
The effective pole arc coefficients are prefetched, λ ' is to prefetch draw ratio, armature outer diameter D1＞ Dil；
(3) the long L ≈ λ ' D of armature core are calculatedi1；
(4) it selects groove profile for trapezoidal mouth fan groove, takes slot shoulder breadthSlot bottom is wideWherein hx1Deep, the h for slot shoulder01For notch depth, hs1It is deep for slot body, take slot opening b01≤
1mm；
(5) rotor collar internal diameter D is calculatedm=Di1- 2 δ, δ are width of air gap, take rotor collar outer diameter Dm＜ D2＜ Di1；
(6) rotor magnetic steel internal diameter D is calculatedmi=Dm-2Hm, HmFor magnet steel section along central axes minimum point to peak away from
From；
(7) rotor magnetic steel section both ends the most length of the low spot to peak is calculatedWith rotor
Two peak of magnet steel section both ends and rotor magnetic steel section determine that a circular arc Li, the circular arc are rotor at 3 points along central axes peak
Magnet steel external arc；
(8) rotor magnetic steel length Lc=L.
It is an advantage of the invention that being designed to 6 pole, 9 slot motor stator, rotor structure respectively to reduce winding back emf
Harmonic wave, to realize the purpose for reducing motor torque fluctuation.
Description of the drawings
Fig. 1 stator profile of groove；
Fig. 2 stator structure figures；
Fig. 3 magnet steel sectional drawings；
Fig. 46 pole, 9 slot motor models using the present invention；
6 pole, the 9 slot motor model that Fig. 5 is not optimized using the present invention；
Fig. 6 uses the motor torque oscillogram of the method for the present invention；
Fig. 7 does not use the motor torque oscillogram of the method for the present invention.
Specific implementation mode
It describes in detail in the following with reference to the drawings and specific embodiments to the present invention：
A kind of 6 pole of reduction, 9 slot synchronous electric machine torque wave method, it includes the following steps：
(1) power P is calculatedi', if motor longtime running,If motor is run in short-term,Wherein PNFor motor rated power, η ' is motor prefetching efficiency.
(2) armature internal diameter is calculatedB'δTo prefetch air gap flux density, A'δTo prefetch specific electric load, αiFor
The effective pole arc coefficients are prefetched, λ ' is to prefetch draw ratio, armature outer diameter D1＞ Dil。
(3) the long L ≈ λ ' D of armature core are calculatedi1。
(4) it selects groove profile for trapezoidal mouth fan groove, takes slot shoulder breadthSlot bottom is wideWherein hx1Deep, the h for slot shoulder01For notch depth, hs1It is deep for slot body.Take slot opening b01≤
1mm。
(5) rotor collar internal diameter D is calculatedm=Di1- 2 δ, δ are width of air gap, take rotor collar outer diameter Dm＜ D2＜ Di1。
(6) rotor magnetic steel internal diameter D is calculatedmi=Dm-2Hm, HmFor magnet steel section along central axes minimum point to peak away from
From.
(7) rotor magnetic steel section both ends the most length of the low spot to peak is calculatedWith rotor
Two peak of magnet steel section both ends and rotor magnetic steel section determine that a circular arc Li, the circular arc are rotor at 3 points along central axes peak
Magnet steel external arc.
(8) rotor magnetic steel length Lc=L.
In conjunction with the embodiments, the invention will be further described for attached drawing：Permanent magnet synchronous motor parameter is rated voltage UN=
270V, rated speed nN=10000rpm, nominal torque TN=4Nm, rated power PN=4.18kW, longtime running, using 6 poles 9
Slot structure.
1. prefetching efficiency η '=0.9 calculates power
2. prefetching specific electric load As'=30A/mm prefetches air gap flux density B'δ=0.7T prefetches the effective pole arc coefficients αi=0.9,
Draw ratio λ '=2.2 are prefetched, armature internal diameter is calculatedArmature outer diameter D1=84mm.
3. calculating the long L ≈ λ ' D of armature corei1≈85mm。
4. selecting groove profile for trapezoidal mouth fan groove, slot opening b is taken01=0.5mm, slot shoulder depth hx1=1.4mm, notch depth h01
=0.5mm, slot body depth hs1=15mm, then slot shoulder breadthSlot bottom is wideStator groove profile is as shown in Figure 1, stator structure is as shown in Figure 2.
5. taking width of air gap δ=0.8mm, then rotor collar internal diameter Dm=Di1- 2 δ=37.4mm take rotor collar outer diameter D2
=38mm.
6. taking distance H of the magnet steel section along central axes minimum point to peakm=5mm, then rotor magnetic steel internal diameter Dmi=Dm-
2Hm=27.4mm.
7. rotor magnetic steel section both ends the most length of the low spot to peakTo turn
Two peak of sub- magnet steel section both ends and rotor magnetic steel section determine that a circular arc Li, the circular arc are to turn at 3 points along central axes peak
Sub- magnet steel external arc.Magnet steel section is as shown in Figure 3.
8. rotor magnetic steel length Lc=L=85mm.
9. stator and rotor sructure figure is as shown in Figure 4.
To not using 6 pole, the 9 slot motor model of the method for the present invention optimization as shown in figure 5, the model stator structure and Fig. 2 phases
Together, rotor magnetic steel is not optimized, i.e. Lmi=Hm=5mm, carries out finite element analysis to Fig. 4 Fig. 5 motor models respectively, and rotating speed is
Rated speed nNMotor output nominal torque T when=10000rpmN=4Nm, obtained motor torque oscillogram is respectively such as Fig. 6, figure
Shown in 7.By simulation result it is found that the motor torque that the method for the present invention designs is used to fluctuate as 0.25Nm, present invention side is not used
The motor torque fluctuation of method design is 0.45Nm.The result shows that 6 pole, 9 slot motor torque can be reduced using design method of the present invention
Fluctuation.
Claims (1)
1. a kind of 6 pole of reduction, 9 slot synchronous electric machine torque wave method, it is characterised in that：It includes the following steps：
(1) calculate power P 'iIf motor longtime running,If motor short-term operation,
Wherein PN is motor rated power, and η ' is motor prefetching efficiency；
(2) armature internal diameter is calculatedB'δTo prefetch air gap flux density, A'δTo prefetch specific electric load, αiTo prefetch
The effective pole arc coefficients, λ ' are to prefetch draw ratio, armature outer diameter D1＞ Dil；
(3) the long L ≈ λ ' D of armature core are calculatedi1；
(4) it selects groove profile for trapezoidal mouth fan groove, takes slot shoulder breadthSlot bottom is wideWherein hx1Deep, the h for slot shoulder01For notch depth, hs1It is deep for slot body, take slot opening b01
≤1mm；
(5) rotor collar internal diameter D is calculatedm=Di1- 2 δ, δ are width of air gap, take rotor collar outer diameter Dm＜ D2＜ Di1；
(6) rotor magnetic steel internal diameter D is calculatedmi=Dm-2Hm, HmIt is magnet steel section along the distance of central axes minimum point to peak；
(7) rotor magnetic steel section both ends the most length of the low spot to peak is calculatedWith rotor magnetic steel
Two peak of section both ends and rotor magnetic steel section determine that a circular arc Li, the circular arc are rotor magnetic steel at 3 points along central axes peak
External arc；
(8) rotor magnetic steel length Lc=L.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510094682.1A CN105939087B (en) | 2015-03-03 | 2015-03-03 | A kind of 6 pole of reduction, 9 slot synchronous electric machine torque wave method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510094682.1A CN105939087B (en) | 2015-03-03 | 2015-03-03 | A kind of 6 pole of reduction, 9 slot synchronous electric machine torque wave method |
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|---|---|
| CN105939087A CN105939087A (en) | 2016-09-14 |
| CN105939087B true CN105939087B (en) | 2018-09-18 |
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| CN108347106A (en) * | 2018-05-09 | 2018-07-31 | 江苏富丽华通用设备股份有限公司 | A kind of rotor punching of low-noise low vibration magneto |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101997373A (en) * | 2009-08-12 | 2011-03-30 | 通用汽车环球科技运作公司 | Concentrated winding machines with reduced torque ripple and methods for designing the same |
| CN103089418A (en) * | 2011-11-01 | 2013-05-08 | 通用汽车环球科技运作有限责任公司 | Apparatus for reducing engine torque fluctuations |
| CN104034464A (en) * | 2014-06-28 | 2014-09-10 | 哈尔滨工业大学 | Even unit alternating-current permanent magnet motor torque ripple testing method |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3428896B2 (en) * | 1998-05-07 | 2003-07-22 | オークマ株式会社 | Motor with reduced torque ripple |
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2015
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101997373A (en) * | 2009-08-12 | 2011-03-30 | 通用汽车环球科技运作公司 | Concentrated winding machines with reduced torque ripple and methods for designing the same |
| CN103089418A (en) * | 2011-11-01 | 2013-05-08 | 通用汽车环球科技运作有限责任公司 | Apparatus for reducing engine torque fluctuations |
| CN104034464A (en) * | 2014-06-28 | 2014-09-10 | 哈尔滨工业大学 | Even unit alternating-current permanent magnet motor torque ripple testing method |
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