CN102255460A - Permanent magnet synchronous machine (PMSM) possessing assembled magnetic effect - Google Patents
Permanent magnet synchronous machine (PMSM) possessing assembled magnetic effect Download PDFInfo
- Publication number
- CN102255460A CN102255460A CN2011101655806A CN201110165580A CN102255460A CN 102255460 A CN102255460 A CN 102255460A CN 2011101655806 A CN2011101655806 A CN 2011101655806A CN 201110165580 A CN201110165580 A CN 201110165580A CN 102255460 A CN102255460 A CN 102255460A
- Authority
- CN
- China
- Prior art keywords
- rotor
- stator
- winding
- permanent magnet
- magnetic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Abstract
The invention provides a permanent magnet synchronous machine (PMSM) possessing an assembled magnetic effect. The PMSM comprises a stator and a rotor. Air gaps exist between the stator and the rotor. The stator includes a stator core and a stator winding. The rotor includes a rotor core, a rotating shaft and permanent magnet steel. The stator winding is a centralized winding. The rotor is an eccentric rotor. Ends of the permanent magnet steel are directly connected with each other. The air gaps between the stator and the rotor are non-uniform air gaps. The invention has the following positive effects that: (1) distribution of air-gap flux density can be optimized through improving a rotor structure and the air gap flux can be very close to a sinusoidal waveform by using the non-uniform air gaps; (2) magnetic flux leakage on the ends can be effectively reduced because the ends of the permanent magnet steel are directly connected with each other, and simultaneously a magnetic isolation bushing is not needed to be installed on a rotating shaft side so that a requirement of a rotating shaft material can be reduced, wherein the rotating shaft can adopt a magnetic conductive material and/or a non magnetic conductive material.
Description
Technical field
The present invention relates to a kind of ac synchronous motor, particularly relate to a kind of permagnetic synchronous motor with magnet accumulating cap.
Background technology
Permagnetic synchronous motor (Permanent Magnet Synchronous Machine, PMSM) owing to do not have excitation winding and excitation unit, do not consume exciting power, can also save slip ring and brush, so compare with electro-magnetic motor, have remarkable advantages such as simple in structure, reliable, that power density is high, loss is few, shape and size are versatile and flexible, range of application is very extensive.
Traditional permagnetic synchronous motor can be divided into surface-type and built-in two kinds of structures by permanent magnet in epitrochanterian position difference.Air gap between stator and the rotor is that stator winding adopts distributed winding to make the air-gap flux of motor better near Sine distribution uniformly.
Shown in the accompanying drawing 1 is typical radial surface formula rotor magnetic circuit structural, and permanent magnet is attached to rotor surface, and directly towards air gap, magnetic leakage factor is less.Shown in the accompanying drawing 2 is typical built-in radial formula rotor magnetic circuit structural, the pole shoe that has ferromagnetic material to make between the circle in permanent magnet outer surface and the stator, and its d-axis reactance and quadrature axis reactance are not wait, and are similar to salient pole machine.Attached Fig. 1 and 2 all adopts radially magnetic structure, in radial structure, two permanent magnets of a pair of utmost point are connected, a permanent magnet cross section provides magnetic flux to every utmost point air gap, two permanent magnets provide magnetic potential to magnetic circuit, therefore, motor gas-gap magnetic flux density is approximately equal to the magnetic flux density of permanent magnet working point.
Shown in Figure 3 is built-in tangential formula rotor magnetic circuit structural, adjacent two permanent magnets are in parallel, provide magnetic flux by magnetic pole to air gap by two permanent magnet cross sections, have only a permanent magnet to provide magnetic potential to magnetic circuit, its gap density may be a kind of magnetism-collected structure form greater than the magnetic flux density of permanent magnet working point.
Shown in Figure 4 is another Chinese patent " novel permanent magnetic synchronous motor of winding is concentrated in employing " (application number: 200910054368.5) that the applicant applies for, adopt and concentrate winding, rotor designs for eccentric arc, for radial structure, air-gap induction is higher, and electric efficiency increases.
Adopt the permagnetic synchronous motor of rotor structure as shown in Figure 1, the weight of rotor is big, moment of inertia is big, tile shape that it adopts and arc-shaped permanent magnet complex-shaped, processing time consuming, processing cost height; And armature reaction directly acts on the permanent magnet, causes irreversible demagnetization easily; Rotor surface can't be installed the startup winding, does not have asynchronous startup ability, can not be used for the asynchronous starting permagnetic synchronous motor, and the electromagnetic power of motor and electromagnetic torque are less.
Adopt the permagnetic synchronous motor of rotor structure as shown in Figure 2, though its d-axis reactance and quadrature axis reactance are unequal, belong to salient pole machine, has higher electromagnetic power, but for be air-gap flux better near Sine distribution, stator adopts distributed winding.And using distributed winding to have following shortcoming: a large amount of copper are grown, wasted to (1) distributed winding overhang; (2) leakage reactance is bigger; (3) difficulty that rolls off the production line, complex structure.
Adopt the permagnetic synchronous motor of Fig. 3 and rotor structure shown in Figure 4, though all have certain magnet accumulating cap, its rotating shaft side leakage magnetic is big, and the rotating shaft side need adopt non-magnetism bush every magnetic, rotating shaft material is a non-magnet material, has following shortcoming: (1) weight is big; (2) complex structure; (3) countershaft material requirements height.
Therefore, we need a kind of simple in structure, in light weight, the countershaft material requirements is low, motor performance is good permagnetic synchronous motor.
Summary of the invention
For solving the deficiencies in the prior art, the invention provides a kind of permagnetic synchronous motor with magnet accumulating cap, it has reduced brow leakage, cancelled non-magnetism bush, widened the range of choice of rotating shaft material, simplify electric machine structure, optimized motor performance, and easy, simple in structure, the manufacturing cycle weak point, in light weight that rolls off the production line.
The technical scheme that the present invention takes is:
A kind of permagnetic synchronous motor with magnet accumulating cap, comprise stator and rotor, have 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 stator winding is centralized winding, and described rotor is the rotor of off-centre operation arc, and described permanent magnetic steel end directly links to each other, the magnet steel width is got limiting value, 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 rotor of described off-centre operation arc is meant, the described rotor profile lotus petal type that several circular arcs are formed of serving as reasons, and the center of circle O ' of described circular arc departs from stator center of circle O.
The invention has the beneficial effects as follows:
(1) by improvement, optimized the distribution of air gap flux density, utilized non-homogeneous air gap to make air-gap flux better near sinusoidal waveform to rotor structure;
(2) adopt eccentric circular arc rotor to have the advantage that weight is little, moment of inertia is little, so motor have better starting performance;
(3) adopt centralized winding to have that the end is short, copper consumption is few, leakage reactance is little, efficient is high, roll off the production line conveniently, the manufacturing cycle is short, simple in structure, winding overhang is not overlapping, the low advantage of generation shorted-turn fault probability;
(4) the permanent magnetic steel end directly links to each other, and has reduced brow leakage effectively, simultaneously, makes that the rotating shaft side need not to install every the magnetic lining, and has reduced the requirement of countershaft material;
(5) by adopting the magnetic structure of built-in tangential rotors, the eddy current loss of rotor surface is significantly reduced, reduced the cost of permanent magnetic material simultaneously; And built-in tangential rotors makes hands over the axle inductance greater than the d-axis inductance, has improved the leading synchronously into ability, overload capacity and power density of motor, makes motor have the bigger degree of freedom in the design aspect mechanical structure and the torque rotary speed characteristic;
(6) further adopt fractional slot winding, every extremely every phase groove number of equivalence is increased, thereby weaken 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;
(7) d-axis reactance of rotor 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 1-4 is respectively the structural representation of existing permagnetic synchronous motor;
Accompanying drawing 5 is planar structure schematic diagrames of stator of the present invention and rotor;
Accompanying drawing 6 is rotor plane structural representations of the present invention.
Wherein:
10. stator 11. stator cores
12. stator winding 20. rotors
21. rotor core 22. rotating shafts
23. permanent magnetic steel 30. air gaps.
Embodiment
Give explained in detail below in conjunction with accompanying drawing to the specific embodiment of the present invention.
Please refer to Fig. 5, a kind of permagnetic synchronous motor of the present invention with magnet accumulating cap, adopt built-in tangential formula rotor magnetic circuit structural, comprise stator 10 and rotor 20,20 of stator 10 and rotors have air gap 30, described stator 10 comprises stator core 11 and stator winding 12, and described rotor 20 comprises rotor core 21, rotating shaft 22 and permanent magnetic steel 23.
Please continue with reference to figure 5, described stator 10 has 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.
Please continue with reference to figure 5, described stator winding 12 is centralized winding, make motor effectively utilize copper, have that the end is short, copper consumption is few, leakage reactance is little, efficient is high, roll off the production line conveniently, the manufacturing cycle is short, simple in structure, winding overhang is not overlapping, the low advantage of generation shorted-turn fault probability.
Please continue with reference to figure 5, the air gap 30 between described stator 10 and the described rotor 20 is non-homogeneous air gap, has weakened armature reaction, makes air-gap flux better near sinusoidal waveform.
Please refer to Fig. 6, described rotor 20 is an eccentric rotor, the profile lotus petal type that several circular arcs are formed of serving as reasons, and the center of circle O ' of described circular arc departs from respect to stator center of circle O, and both have certain deviation.
Please continue with reference to figure 6, described permanent magnetic steel 23 is a radial magnet steel, and the end directly links to each other, and the magnet steel width is got limiting value, has reduced brow leakage effectively, has improved air gap flux density, makes that the rotating shaft side need not to install every the magnetic lining.Therefore, no matter rotating shaft is to adopt permeability magnetic material or non-magnet material, and the air-gap induction of motor and every utmost point magnetic flux all increase, thereby have reduced the requirement of countershaft material.
The present invention adopts built-in tangential formula rotor magnetic circuit structural, and air-gap induction is improved, and has improved exerting oneself of motor effectively, improves motor properties.Among the present invention, the d-axis reactance of rotor and quadrature axis reactance do not wait, and can improve the leading synchronously into ability, overload capacity and power density of motor.By the load angle characteristic formula:
As can be known, the present invention has higher electromagnetic power and electromagnetic torque, thereby makes motor have bigger detent torque, starts sooner, and efficient is higher.
The present invention has inherited the advantage of traditional built-in tangential formula rotor magnetic circuit structural permagnetic synchronous motor, the shape of permanent magnetic steel relative with structure simple, easy to process, electromagnetic torque is big, power density is high, and has magnet accumulating cap.By the circular arc rotor of off-centre, make air-gap flux better near sinusoidal waveform.In addition, directly link to each other by end permanent magnetic steel, make the magnet steel width get limiting value, reduced the end magnetic leakage effectively, improved air-gap induction, made the rotating shaft side need not to install every the magnetic lining, reduced the requirement of countershaft material, increase the utilance of magnet steel, optimized the structure of motor, alleviated motor weight.
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 with magnet accumulating cap, comprise stator and rotor, have 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, it is characterized in that, described stator winding is centralized winding, and described rotor is the rotor of off-centre operation arc, and described permanent magnetic steel end directly links to each other, the magnet steel width is got limiting value, and the air gap between described stator and the described rotor is non-homogeneous air gap.
2. the permagnetic synchronous motor with magnet accumulating cap 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 with magnet accumulating cap 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 |
|---|---|---|---|
| CN2011101655806A CN102255460A (en) | 2011-06-20 | 2011-06-20 | Permanent magnet synchronous machine (PMSM) possessing assembled magnetic effect |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101655806A CN102255460A (en) | 2011-06-20 | 2011-06-20 | Permanent magnet synchronous machine (PMSM) possessing assembled magnetic effect |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102255460A true CN102255460A (en) | 2011-11-23 |
Family
ID=44982489
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101655806A Pending CN102255460A (en) | 2011-06-20 | 2011-06-20 | Permanent magnet synchronous machine (PMSM) possessing assembled magnetic effect |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102255460A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578472A (en) * | 2013-10-18 | 2015-04-29 | 通用电气公司 | Torque ripple reduction in electric machines |
| CN104638789A (en) * | 2015-02-14 | 2015-05-20 | 开平市新东亚电机有限公司 | Non-circular rotor sheet applied to motor |
| CN104638790A (en) * | 2015-02-14 | 2015-05-20 | 开平市新东亚电机有限公司 | Non-circular rotor applied to motor |
| CN105391265A (en) * | 2015-12-21 | 2016-03-09 | 东南大学 | Hybrid excitation fault-tolerant motor system based on brushless harmonic excitation |
| CN109412285A (en) * | 2018-11-26 | 2019-03-01 | 成都富临精工电子电器科技有限公司 | A kind of non-brush permanent-magnet DC motor stator structure |
| CN109728665A (en) * | 2017-10-30 | 2019-05-07 | 大隈株式会社 | Synchronous motor |
| CN114678973A (en) * | 2021-12-03 | 2022-06-28 | 江苏集萃智能制造技术研究所有限公司 | Noise reduction motor for window opening |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201194346Y (en) * | 2008-04-09 | 2009-02-11 | 上海电机学院 | Tangential magnetic steel permanent magnet motor |
| CN101938203A (en) * | 2009-07-03 | 2011-01-05 | 上海电机学院 | Permanent-magnet synchronous motor adopting concentrated winding |
-
2011
- 2011-06-20 CN CN2011101655806A patent/CN102255460A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201194346Y (en) * | 2008-04-09 | 2009-02-11 | 上海电机学院 | Tangential magnetic steel permanent magnet motor |
| CN101938203A (en) * | 2009-07-03 | 2011-01-05 | 上海电机学院 | Permanent-magnet synchronous motor adopting concentrated winding |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578472A (en) * | 2013-10-18 | 2015-04-29 | 通用电气公司 | Torque ripple reduction in electric machines |
| CN104638789A (en) * | 2015-02-14 | 2015-05-20 | 开平市新东亚电机有限公司 | Non-circular rotor sheet applied to motor |
| CN104638790A (en) * | 2015-02-14 | 2015-05-20 | 开平市新东亚电机有限公司 | Non-circular rotor applied to motor |
| CN105391265A (en) * | 2015-12-21 | 2016-03-09 | 东南大学 | Hybrid excitation fault-tolerant motor system based on brushless harmonic excitation |
| CN109728665A (en) * | 2017-10-30 | 2019-05-07 | 大隈株式会社 | Synchronous motor |
| CN109412285A (en) * | 2018-11-26 | 2019-03-01 | 成都富临精工电子电器科技有限公司 | A kind of non-brush permanent-magnet DC motor stator structure |
| CN114678973A (en) * | 2021-12-03 | 2022-06-28 | 江苏集萃智能制造技术研究所有限公司 | Noise reduction motor for window opening |
| CN114678973B (en) * | 2021-12-03 | 2023-09-15 | 江苏集萃智能制造技术研究所有限公司 | Noise reduction motor for windowing |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102255460A (en) | Permanent magnet synchronous machine (PMSM) possessing assembled magnetic effect | |
| CN104201852B (en) | Winding complementary type rotor permanent magnet flux switch motor | |
| CN105656271B (en) | A kind of pole-changing windingses method of transition asynchronous starting permanent magnet synchronous motor | |
| CN101420160B (en) | Permanent magnet synchronous motor of sine pole width modulation | |
| CN109861413B (en) | Magnetic-gathering alternating-pole fault-tolerant permanent magnet vernier motor | |
| CN101651395B (en) | Sine wave current self-starting three-phase rare earth permanent-magnetism synchronous motor | |
| CN202111605U (en) | Self-starting permanent magnetism motor with rotor magnetic pole of three arcs structure | |
| CN110601481A (en) | Birotor permanent magnet synchronous reluctance motor and configuration method | |
| CN103872811A (en) | Bearing-less stator surface mounting type permanent magnet motor for semi-tooth winding | |
| CN204858923U (en) | A directly drive formula permanent magnetism AC servo motor for forging press | |
| CN202068306U (en) | Three-phase permanent magnetic servo motor with void slot structure | |
| CN106712345A (en) | Motor rotor and motor adopting the same | |
| CN105262254A (en) | Surface-built-in mixed speed-regulating permanent magnet synchronous motor | |
| CN210350986U (en) | Birotor permanent magnet synchronous reluctance motor | |
| CN103023260B (en) | Two pole formula rotor for self-starting permanents | |
| CN103178672B (en) | Stator-surface-mounted type doubly salient permanent magnet motor adopting modularized rotor | |
| CN102868246B (en) | High-capacity low-speed permanent-magnet wind-driven generator | |
| CN208316427U (en) | A kind of mutually short magnetic circuit switch reluctance motor of Coupling Between Phases type five | |
| CN203312945U (en) | Permanent magnetic rotor of three-phase asynchronous motor | |
| CN201107841Y (en) | Permanent magnet synchronous motor of sine pole width modulation | |
| CN107086686B (en) | A kind of built-in permanent magnet motor rotor | |
| CN102624116B (en) | Subsection skewed pole-shoe type permanent magnet motor rotor | |
| CN206620033U (en) | A kind of permanent-magnet synchronous electric motor for compressor | |
| CN203086308U (en) | Asynchronous starting permanent magnet synchronous motor rotor and permanent magnet motor thereof | |
| CN202524197U (en) | Segmental skewed pole shoe type permanent magnet motor rotor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20111123 |