CN207039424U - A kind of permanent magnet low-speed directly drives synchronous motor - Google Patents
A kind of permanent magnet low-speed directly drives synchronous motor Download PDFInfo
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- CN207039424U CN207039424U CN201720922433.1U CN201720922433U CN207039424U CN 207039424 U CN207039424 U CN 207039424U CN 201720922433 U CN201720922433 U CN 201720922433U CN 207039424 U CN207039424 U CN 207039424U
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- permanent magnet
- synchronous motor
- teeth groove
- rotor
- directly drives
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Abstract
The utility model discloses a kind of permanent magnet low-speed directly to drive synchronous motor.The motor includes outer rotor, inner stator, outer rotor is made up of aluminum hull, rotor core and magnet steel, inner stator stator core, three-phase windings, and rotor slot number ratio is 39/44, stator winding uses multipole multiple-grooved fractional-slot winding structure, and rotor magnetic steel is using the V-structure for optimizing angle.The utility model has preferable low-speed performance, Low-torque fluctuation, high power density, high torque volume ratio, good manufacturability.
Description
Technical field
Technical field of motors is the utility model is related to, more particularly to a kind of permanent magnet low-speed directly drives synchronous motor.
Background technology
In drive system used in industrial and mining enterprises, low speed high torque load occupies larger proportion, at present mainly using
Power frequency asynchronous motor or other high-speed motors, it is equipped with reduction box.Decelerator failure, maintenance, damage thus be present
The problems such as consumption, noise, life-span.
The permasyn morot and brushless direct current motor that China largely uses now, are equipped with suitable driver,
During higher rotation speed, preferable working condition can be reached substantially, but generally turn at low speed open loop operation (being less than 20 revs/min)
It is fast unstable, creep, the problems such as torque fluctuations are big.
Number of poles is few, the integer groove winding more than slot number, is relatively adapted to the motor of high speed operation, but it is not easy to form sine magnetic
Gesture and back-emf, and iron core yoke part size is larger, and power of motor density is smaller.The group of fractional-slot motor, slot number and number of poles
Conjunction species is various, but does not know also to obtain according to the shape of the tooth socket fit of current rotor, the pole embrace of magnet steel and magnet steel
To more satisfactory sine wave magnetic potential and back-emf, and analyzing its electromagnetic effects, slot effect, torque fluctuations, winding line
When mode, winding short distance and breadth coefficient, although there is the stronger method of some theoretical properties at present, lack the work of simple and practical property
Tool.
Utility model content
The purpose of this utility model is to propose a kind of efficient permanent magnet low-speed direct driving synchronous motor of optimization, has low speed big
The preferable combination property such as torque.
The technical solution of the utility model is：
The permanent magnet low-speed directly drives synchronous motor, including the stator positioned at inner side and the rotor positioned at outside, the rotor
Mainly it is made up of rotor core and magnet steel, inside the magnet steel insertion rotor core, is arranged one week with V-structure；The stator
Using multipole multiple-grooved fractional-slot winding structure, stator punching slot number is 39, and rotor number of poles is 44, and all teeth groove press 120 ° of electricity of three-phase
Gas position is divided equally, and three-phase symmetric winding is wound on teeth groove by monodentate.
On the basis of above scheme, the utility model has also done following important optimization：
A phase windings are made up of the 39,1,2,8,9,10,16,17,24,25,31,32,33rd teeth groove；
C phase windings are made up of the 5,6,7,13,14,15,21,22,23,29,30,37,38th teeth groove；
B phase windings are made up of the 3,4,11,12,18,19,20,26,27,28,34,35,36th teeth groove；
From the 1st teeth groove to the 39th teeth groove, coiling is carried out by following direction successively：
Along inverse along suitable inverse along inverse suitable inverse
Along inverse along suitable inverse along inverse suitable inverse
Along inverse along suitable inverse along inverse suitable inverse.
Angle α=122 ° in the V-structure of above-mentioned magnet steel.
γ 1=0.78 ± 0.01 of pole embrace γ 2/ of above-mentioned magnet steel.
Keep at a distance W=1~2mm between two original papers in each teeth groove.
Radiating aluminum hull is provided with the outside of above-mentioned rotor core.
Scheme compared to existing technology, the utility model have the advantages that：
Rotor slot number, number of poles, magnet steel form and the winding configuration of the utility model comprehensive Design, it is big to realize low speed
Torque, straight drive in drive system can be applied without deceleration system, improve the reliability, stationarity, maintenance of drive system
Property, transmission efficiency increase, noise and vibration reduction, life-span increase.
The multipole multiple-grooved fractional-slot winding of the utility model design, is especially suitable for low-speed direct driving system, low-speed pulse is small, power
Square fluctuates small, the close height of magnetic, and winding utilization is high, and power density is big.
Brief description of the drawings
Fig. 1 motor general structure schematic diagrams of the present utility model.
Fig. 2 rotor structure schematic diagrames.
Fig. 3 is the thin portion enlarged diagram in Fig. 2.
Fig. 4 winding star potential vector figures.
Fig. 5 stator punchings and winding.
Fig. 6 three-phase windings split-phase and winding coefficient.
Drawing reference numeral explanation：
1- stators；2- rotors；201- magnet steel；202- rotor cores, 203- radiating aluminum hulls.
Embodiment
The utility model is further described with reference to the accompanying drawings and examples.
The present embodiment is that a external diameter is φ 320mm, and thickness is that the multiple-grooved multipole external rotor permanent magnet of 70mm big torque is same
Motor is walked, as shown in figure 1, including stator 1 and rotor 2.
Stator punching slot number is 39, and rotor number of poles is 44, there is higher least common multiple, can be in the situation without skewed slot
Under reduce cogging torque to greatest extent, the electromagnetic torque stablized.Experiment proves that this combination has good low speed maneuverability
Energy.Specifically, winding coefficient is higher, and slot effect is smaller, takes 39 and 44 least common multiple, is 39*44=1716, i.e., electronic
The cogging torque of machine fluctuates 1716 times/circle, had both reduced cogging torque numerical value, and had reduced the cycle again, and had been advantageous to motor low
During speed operation, elimination is creeped, torque fluctuations, reduction low speed lower limit.
As shown in Figure 2 and Figure 3, rotor is made up of magnet steel 201, rotor core 202 and radiating aluminum hull 203.Wherein, magnet steel is adopted
With embedded V-structure, the effect of increase air gap flux density is served.In the V-type magnetic steel structure, according to calculate and verification experimental verification,
Consider counter potential waveform quality and magnet steel dosage, optimization obtains angle α=122 ° in V-structure, the polar arc system of magnet steel
Number γ 2/ γ 1=0.78 ± 0.01, now the counter potential waveform of motor is closest to sinusoidal, when being advantageous to eliminate motor operation
Torque fluctuations.
39 groove stators, the 44 pole rotors determined according to the utility model, three-phase symmetric winding are wound on teeth groove by monodentate,
All grooves progress 120 ° of electric positions of three-phase are divided equally, according to the winding configuration of routine with regard to motor can be produced.
The utility model determines the three-phase windings method of salary distribution as shown in Figure 4：
A phase windings are made up of the 39,1,2,8,9,10,16,17,24,25,31,32,33rd tooth
C phase windings are made up of the 5,6,7,13,14,15,21,22,23,29,30,37,38th tooth
B phase windings are made up of the 3,4,11,12,18,19,20,26,27,28,34,35,36th tooth.
The winding mode such as Fig. 5 is determined simultaneously, from tooth 1 to tooth 39, is pressed：
Along inverse along suitable inverse along inverse suitable inverse
Along inverse along suitable inverse along inverse suitable inverse
Along inverse along suitable inverse along inverse suitable inverse
Carry out coiling.
As shown in fig. 6, the optimal winding configuration can form the packet mode of maximum magnetic potential, winding coefficient reaches maximum, around
Group utilization rate is maximum, improves counter potential waveform, improves motor efficiency.Fig. 6 is 13 coils of A phase windings, wherein on
The 31 of half part, 8,24,1,17,33,10 teeth are clockwise windings, the 2 of the latter half, 25,9,32,16,29 teeth are counterclockwise
Winding.Specifically collect such as table 1：
The winding split-phase of table 1 and winding technique mode
By Fig. 6, the utility model proposes the breadth coefficient of the winding configuration to calculate practical approach：
The magnetic potential vector of all original papers for belonging to the phase is projected on the 1st tooth, obtains its vector, then it is average,
Produce the breadth coefficient of winding：
Wherein：β=360/39=9.23 °
Certain distance W=1~2mm is also left in each original paper side of stator winding by the utility model in each groove,
Both it is beneficial to winding insulation, and forms a vent passages in the stator, be so especially advantageous for the ventilation and heat of winding, improves motor
Power density.
The motor of the present embodiment, the main technical detail obtained after tested are as follows：
Rated voltage：60V
Rated current：3A
Rated speed：4r/min
Nominal torque：140Nm
Specified temperature rise：75K
No-load current：0.09A
No power cogging torque：0.26Nm
As a result proof the utility model is above feasible in the application of low speed high torque.
Described above is only preferred embodiment of the present utility model, is come for those skilled in the art
Say, on the premise of the utility model principle is not departed from, some variations and modifications can also be made, these variations and modifications also should
It is considered as the scope of protection of the utility model.
Claims (6)
1. a kind of permanent magnet low-speed directly drives synchronous motor, including the stator positioned at inner side and the rotor positioned at outside, the rotor
Mainly it is made up of rotor core and magnet steel, it is characterised in that：Inside the magnet steel insertion rotor core, with V-structure arrangement one
Week；The stator uses multipole multiple-grooved fractional-slot winding structure, and stator punching slot number is 39, and rotor number of poles is 44, all teeth groove
Divide equally by 120 ° of electric positions of three-phase, three-phase symmetric winding is wound on teeth groove by monodentate.
2. permanent magnet low-speed according to claim 1 directly drives synchronous motor, it is characterised in that：
A phase windings are made up of the 39,1,2,8,9,10,16,17,24,25,31,32,33rd teeth groove；
C phase windings are made up of the 5,6,7,13,14,15,21,22,23,29,30,37,38th teeth groove；
B phase windings are made up of the 3,4,11,12,18,19,20,26,27,28,34,35,36th teeth groove；
From the 1st teeth groove to the 39th teeth groove, coiling is carried out by following direction successively：
Along inverse along suitable inverse along inverse suitable inverse
Along inverse along suitable inverse along inverse suitable inverse
Along inverse along suitable inverse along inverse suitable inverse.
3. permanent magnet low-speed according to claim 1 directly drives synchronous motor, it is characterised in that：The V-structure of the magnet steel
In angle α=122 °.
4. permanent magnet low-speed according to claim 3 directly drives synchronous motor, it is characterised in that：The pole embrace of the magnet steel
γ 1=0.78 ± 0.01 of γ 2/.
5. permanent magnet low-speed according to claim 1 directly drives synchronous motor, it is characterised in that：Two originals in each teeth groove
Keep at a distance W=1~2mm between part.
6. permanent magnet low-speed according to claim 1 directly drives synchronous motor, it is characterised in that：The outside of the rotor core
It is provided with radiating aluminum hull.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720922433.1U CN207039424U (en) | 2017-07-27 | 2017-07-27 | A kind of permanent magnet low-speed directly drives synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720922433.1U CN207039424U (en) | 2017-07-27 | 2017-07-27 | A kind of permanent magnet low-speed directly drives synchronous motor |
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| Publication Number | Publication Date |
|---|---|
| CN207039424U true CN207039424U (en) | 2018-02-23 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201720922433.1U Expired - Fee Related CN207039424U (en) | 2017-07-27 | 2017-07-27 | A kind of permanent magnet low-speed directly drives synchronous motor |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107276355A (en) * | 2017-07-27 | 2017-10-20 | 西安思坦科技有限公司 | A kind of permanent magnet low-speed directly drives synchronous motor |
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2017
- 2017-07-27 CN CN201720922433.1U patent/CN207039424U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107276355A (en) * | 2017-07-27 | 2017-10-20 | 西安思坦科技有限公司 | A kind of permanent magnet low-speed directly drives synchronous motor |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180223 Termination date: 20190727 |
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| CF01 | Termination of patent right due to non-payment of annual fee |