CN101938203A - Permanent-magnet synchronous motor adopting concentrated winding - Google Patents
Permanent-magnet synchronous motor adopting concentrated winding Download PDFInfo
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- CN101938203A CN101938203A CN2009100543685A CN200910054368A CN101938203A CN 101938203 A CN101938203 A CN 101938203A CN 2009100543685 A CN2009100543685 A CN 2009100543685A CN 200910054368 A CN200910054368 A CN 200910054368A CN 101938203 A CN101938203 A CN 101938203A
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Abstract
The invention provides a permanent-magnet synchronous motor adopting a concentrated winding, comprising a stator and a rotor. An air gap is formed between the stator and the rotor, the stator comprises a stator core and a stator winding, and the rotor comprises a rotor core, a rotating shaft and a permanent-magnet steel magnet. The permanent-magnet synchronous motor is characterized in that that stator winding is an integrated winding, the rotor is an eccentric rotor, and the air gap between the stator and the rotor is an uneven air gap. The invention has the advantages of less materials consumption, simple structure, convenient production and light weight, reduces the additional loss of motor energy and improves the utilization rate of the motor energy.
Description
Technical field
The present invention relates to a kind of ac synchronous motor, particularly relate to a kind of permagnetic synchronous motor that adopts centralized winding.
Background technology
The stator of traditional permagnetic synchronous motor and the air gap between the rotor are that stator winding adopts distributed winding to make the air-gap flux of motor better near Sine distribution uniformly.
The p-m rotor that traditional permagnetic synchronous motor is commonly used roughly has five kinds of shapes, as shown in Figure 1.Permanent magnet shown in accompanying drawing 1 (a) and (b), (c) adopts radial magnetizing, and permanent magnet is attached to rotor surface, and the d-axis reactance and the quadrature axis reactance of rotor equate, are similar to non salient pole machine; Accompanying drawing 1 (d) though shown in permanent magnet adopt radial magnetizing but permanent magnet is positioned at internal rotor, the pole shoe that has ferromagnetic material to make between permanent magnet outer surface and the rotor cylindrical, its d-axis reactance and quadrature axis reactance are not wait, and are similar to salient pole machine.Accompanying drawing 1 (a) and (b), (c), (d) all adopt radially magnetic structure, and in radial structure, two permanent magnets of a pair of utmost point are connected, and a permanent magnet cross section provides magnetic flux to every utmost point air gap, and two permanent magnets provide magnetic potential to magnetic circuit.
In traditional permagnetic synchronous motor, permagnetic synchronous motor with the rotor shown in Fig. 1 (a) and (b), (c), the weight of rotor is bigger, moment of inertia is big, the d-axis reactance of permanent-magnetic synchronous motor rotor and quadrature axis reactance equate, its essence is exactly non salient pole machine, and common permagnetic synchronous motor electromagnetic power and electromagnetic torque are less; The d-axis reactance and the quadrature axis reactance of permagnetic synchronous motor with the rotor shown in Fig. 1 (d) is unequal, belong to salient pole machine, also has higher electromagnetic power, but in order to make air-gap flux better near Sine distribution, stator need adopt distributed winding, use distributed winding to have following shortcoming: (1) distributed winding overhang is long, waste big (3) the distributed winding of the distributed winding leakage reactance of a large amount of copper (2) difficulty that rolls off the production line, complex structure.
Summary of the invention
For solving the deficiencies in the prior art, the invention provides a kind of permagnetic synchronous motor that adopts centralized winding, it can effectively utilize copper, reduce the leakage reactance of motor, improves efficiency of motor, and easy, simple in structure, the lightweight motor that rolls off the production line.
The technical scheme that the present invention takes is:
A kind of permagnetic synchronous motor that adopts centralized winding, comprise stator and rotor, has air gap between stator and rotor, described stator comprises stator core and stator winding, described rotor comprises rotor core, rotating shaft, and permanent magnetic steel, and described stator winding is centralized winding, described rotor is an eccentric rotor, and the air gap between described stator and the described rotor is non-homogeneous air gap.
Described stator has nine grooves, and stator winding is a fractional slot winding.
Described permanent magnetic steel is a radial magnet steel.
The present invention adopts the beneficial effect of the permagnetic synchronous motor of centralized winding to be:
(1) novel permanent magnetic synchronous motor of the present invention adopts eccentric circular arc rotor, and weight is little, moment of inertia is little, so motor has better starting performance.
(2) novel permanent magnetic synchronous motor of the present invention is by adopting eccentric circular arc rotor, thereby utilize non-homogeneous air gap better to weaken armature reaction, like this, because the distribution curve of gap density is near sinusoidal wave, thereby make air-gap flux better near sinusoidal waveform, stator just can adopt centralized winding.
(3) novel permanent magnetic synchronous motor stator of the present invention adopt centralized winding have that the end is short, leakage reactance is little, roll off the production line conveniently, simple in structure, the lightweight advantage of motor.
(4) stator of the present invention further adopts fractional slot winding again, adopts fractional slot winding that every extremely every phase groove number of equivalence is increased, thereby weakens the influence of high order harmonic component; On the other hand, adopt the significance of fractional slot winding to be that it can weaken slot ripples effectively, thereby guarantee to make the air-gap flux of motor better near Sine distribution.
(5) d-axis reactance of rotor of the present invention and quadrature axis reactance are not wait, so novel permanent magnetic synchronous motor of the present invention is similar to salient pole machine, by load angle characteristic as can be known, the present invention has bigger electromagnetic power and electromagnetic torque.
Description of drawings
Accompanying drawing 1 (a) one (d) is respectively a kind of structural representation of traditional permagnetic synchronous motor;
Accompanying drawing 2 is rotor plane structural representations of the present invention's permagnetic synchronous motor of adopting centralized winding;
Accompanying drawing 3 is the stator of the present invention's permagnetic synchronous motor of adopting centralized winding and the planar structure schematic diagram of rotor;
Accompanying drawing 4 is distribution curves of the air-gap field of the present invention's permagnetic synchronous motor of adopting centralized winding;
The Sine distribution curve of accompanying drawing 5 magnetic flux that to be the present invention's permagnetic synchronous motors of adopting centralized winding walk back and forth out with Maxwell software.
The Reference numeral that relates among the figure is as follows:
10. stator 11. stator cores
12. stator winding 20. rotors
21. rotor core 22. rotating shafts
23. permanent magnetic steel 24. magnetic field lines
30. air gap
Embodiment
Give explained in detail below in conjunction with accompanying drawing to the specific embodiment of the present invention.
With reference to the accompanying drawings 2, the present invention adopts the permagnetic synchronous motor of centralized winding, comprise stator 10 and rotor 20,20 of stator 10 and rotors have air gap 30, and described stator 10 comprises stator core 11 and stator winding 12, and described rotor 20 comprises rotor core 21, rotating shaft 22, with permanent magnetic steel 23, described stator winding 12 is centralized winding, and described rotor 20 is an eccentric rotor, and the air gap 30 between described stator 10 and the described rotor 20 is non-homogeneous air gap.Described permanent magnetic steel 23 is a radial magnet steel.
With reference to the accompanying drawings 3, depart from respect to the center of circle of stator 10 in the center of circle of rotor 20 of the present invention, and as shown in the figure, the center of circle 0 of stator 10 does not overlap with the center of circle 0 ' of rotor 20 formed circular arcs, and both have certain deviation.
Continuation is with reference to figure 4, this figure shows the DISTRIBUTION OF MAGNETIC FIELD curve of the novel permanent magnetic synchronous motor of the present invention that employing Maxwell software is walked back and forth out, the magnetic line of force 24 that the permanent magnetic steel 23 that stator winding 12 cuttings distribute along rotating shaft 22 produces can find out obviously that from figure the leakage field of motor of the present invention is seldom.
Continuation is with reference to figure 5, and this figure is the Sine distribution curve of the magnetic flux of walking back and forth out with Maxwell software, and transverse axis is an angle, and vertical pivot is a magnetic flux, can significantly find out from figure, and the flux curve of novel permanent magnetic synchronous motor of the present invention is near Sine distribution.
In addition, described stator 10 can be set to have nine grooves, and corresponding stator winding 12 can further be set to fractional slot winding, and every extremely every phase groove number of equivalence is increased, thereby weakens the influence of high order harmonic component; On the other hand, adopt the significance of fractional slot winding to be that also it can weaken slot ripples effectively, thereby the air-gap flux of assurance motor is better near Sine distribution.
The present invention has changed the shape of rotor in the past from the rotor of traditional permagnetic synchronous motor is innovated this technical conceive, makes permagnetic synchronous motor adopt the rotor of eccentric circular arc, and then utilizes non-homogeneous air gap better to weaken armature reaction.Like this,, thereby make air-gap flux better near sinusoidal waveform because the distribution curve of gap density is approaching sinusoidal wave, corresponding, make stator adopt centralized winding.In addition, the present invention also further is improved to fractional slot winding with this stator winding.
The present invention make motor can effectively utilize copper, and electric machine structure is simple by adopting eccentric circular arc rotor and adopting the stator of centralized winding, and stator winding rolls off the production line conveniently, in light weight, and rotor moment of inertia is little, and electric motor starting is fast, bigger social benefit is arranged.The d-axis of novel permanent magnetic synchronous motor rotor of the present invention and quadrature axis reactance do not wait, by the load angle characteristic formula:
As can be known, novel permanent magnetic synchronous motor of the present invention is compared the effect with higher electromagnetic power with most of existing permagnetic synchronous motors.
The present invention is few, simple in structure with material, roll off the production line conveniently, and is in light weight, reduced the excess loss of motor power, improved the utilance of motor power.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, without departing from the inventive concept of the premise; can also make some changes, improvements and modifications, these changes, improvements and modifications also should be considered as protection scope of the present invention.
Claims (3)
1. permagnetic synchronous motor that adopts centralized winding, comprise stator and rotor, has air gap between stator and rotor, described stator comprises stator core and stator winding, and described rotor comprises rotor core, rotating shaft, and permanent magnetic steel, described it is characterized in that, described stator winding is centralized winding, and described rotor is an eccentric rotor, and the air gap between described stator and the described rotor is non-homogeneous air gap.
2. the permagnetic synchronous motor of the centralized winding of employing according to claim 1 is characterized in that, described stator has nine grooves, and stator winding is a fractional slot winding.
3. the permagnetic synchronous motor of the centralized winding of employing according to claim 1 is characterized in that, described permanent magnetic steel is a radial magnet steel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100543685A CN101938203A (en) | 2009-07-03 | 2009-07-03 | Permanent-magnet synchronous motor adopting concentrated winding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100543685A CN101938203A (en) | 2009-07-03 | 2009-07-03 | Permanent-magnet synchronous motor adopting concentrated winding |
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| CN101938203A true CN101938203A (en) | 2011-01-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2009100543685A Pending CN101938203A (en) | 2009-07-03 | 2009-07-03 | Permanent-magnet synchronous motor adopting concentrated winding |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102255460A (en) * | 2011-06-20 | 2011-11-23 | 上海电机学院 | Permanent magnet synchronous machine (PMSM) possessing assembled magnetic effect |
-
2009
- 2009-07-03 CN CN2009100543685A patent/CN101938203A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102255460A (en) * | 2011-06-20 | 2011-11-23 | 上海电机学院 | Permanent magnet synchronous machine (PMSM) possessing assembled magnetic effect |
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Application publication date: 20110105 |