CN103078464B - Built-in permanent magnet synchronous motor - Google Patents
Built-in permanent magnet synchronous motor Download PDFInfo
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- CN103078464B CN103078464B CN201210579675.7A CN201210579675A CN103078464B CN 103078464 B CN103078464 B CN 103078464B CN 201210579675 A CN201210579675 A CN 201210579675A CN 103078464 B CN103078464 B CN 103078464B
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Abstract
The invention discloses a built-in permanent magnet synchronous motor, relates to the technical field of a motor and aims to solve the technical problem of improving the comprehensive quality of the motor. Multiple permanent magnet slots are axially and symmetrically arranged in a rotor of the motor along the central axis of the rotor at intervals, three permanent magnets distributed in an arc band shape are arranged in each permanent magnet slot, wherein one permanent magnet is a middle steel magnet, and the other two permanent magnets are side steel magnets; the built-in permanent magnet synchronous motor is characterized in that each middle steel magnet adopts the normal magnetization vertical to the surface of the steel magnet, and each two side steel magnets in one slot adopt the non-normal magnetization, so that the arc center of a magnet arrangement arc of each permanent magnet slot is enabled not to coincide with the magnetization orientation point of permanent magnets in the corresponding permanent magnet slot. According to the motor provided by the invention, the comprehensive quality of the motor is greatly improved.
Description
Technical field
The present invention relates to motor technology, particularly relate to a kind of technology of internal permanent magnet synchronous motor.
Background technology
Electromechanical integration and automation occasion more and more require efficient, energy-conservation, low noise, intellectuality, to the requirement proposing high efficiency, low noise, high output, fast-response for its supporting motor, and at present many magnetoes exist that Electro Magnetic Compatibility difference, noise are large, little, the defect such as torque fluctuations is large, overload capacity is low and power density is low of exerting oneself.
The rotor of permagnetic synchronous motor all studs with rotor magnetic pole, rotor magnetic pole is laid by multistage magnet steel (being generally three sections) arc band shape and is formed, the rotor magnetic pole of existing permagnetic synchronous motor has two kinds: 1) parallel-oriented magnetic pole, and in this magnetic pole, the direction of magnetization of each section of magnet steel is parallel; 2) radial oriented magnetic pole, in this magnetic pole, the direction of magnetization of each section of magnet steel is normal direction, namely perpendicular to magnet steel surface.Existing permagnetic synchronous motor has many good qualities, as cancel mechanical commutator and brush, maintenance less, efficiency is high, but its armature field is the rotating magnetic field of non-circular great-jump-forward, torque fluctuations is natively larger, add slot effect, there is larger torque fluctuations, affect that motor is efficient, wide range speed control, steadily low noise run, therefore the integrated quality of existing permagnetic synchronous motor is all poor.
Summary of the invention
For the defect existed in above-mentioned prior art, technical problem to be solved by this invention is to provide a kind of internal permanent magnet synchronous motor that significantly can improve motor integrated quality.
In order to solve the problems of the technologies described above, a kind of internal permanent magnet synchronous motor provided by the present invention, comprises stators and rotators, leaves air gap between the inner peripheral surface of described stator and the outer peripheral face of rotor;
Described rotor is interval with multiple permanent magnetism groove around the central axis axial symmetry of rotor, three permanent magnets are provided with in each permanent magnetism groove, in three permanent magnets in each permanent magnetism groove, one of them permanent magnet is middle magnet steel, and another two permanent magnets are sidepiece magnet steel;
In the radial section of rotor, following relation is there is: three permanent magnets in permanent magnetism groove are laid successively along a circular arc line between three permanent magnets in single permanent magnetism groove, and middle magnet steel is between two sidepiece magnet steel, the central point of three permanent magnets all drops on this circular arc line, this circular arc line is that the magnet of this permanent magnetism groove lays camber line, it is a circular arc line protruded towards rotor center axis arc that magnet lays camber line, each permanent magnet by the arc core laying camber line through magnet, and is divided into the consistent block of two shapes through the straight line of this permanent magnet its center point;
It is characterized in that, in the radial section of rotor, between three permanent magnets in single permanent magnetism groove, also there is following relation:
1) the orientation straight line intersection of three permanent magnets in permanent magnetism groove is in a bit, and this point is the magnetization orientation point of permanent magnet in this permanent magnetism groove;
The orientation straight line of permanent magnet refers to, is parallel to the direction of magnetization of affiliated permanent magnet, and the straight line of central point through affiliated permanent magnet;
2) in the middle of, the orientation straight line of magnet steel lays the arc core of camber line through the magnet of permanent magnetism groove, and through the axle center of rotor;
3) magnet of permanent magnetism groove lays the arc core of camber line, does not overlap mutually with the magnetization orientation point of permanent magnet in this permanent magnetism groove.
Further, in the radial section of rotor, following relation is also there is: the spacing between the central point setting the middle magnet steel in the magnetization orientation of permanent magnet in permanent magnetism groove point and this permanent magnetism groove is as H between three permanent magnets in single permanent magnetism groove, the radius of curvature of the magnet laying camber line of this permanent magnetism groove is R, then have H > R, and H value is between 1.2 times of R values to 6 times R value.
Further, H value is 3.6 times of R values.
Further, in the radial section of rotor, following relation is also there is: the spacing between the central point setting the middle magnet steel in the magnetization orientation of permanent magnet in permanent magnetism groove point and this permanent magnetism groove is as H between three permanent magnets in single permanent magnetism groove, the radius of curvature of the magnet laying camber line of this permanent magnetism groove is, then have H < R, and H value is between 0.5 times of R value to 0.8 times R value.
Further, H value is 0.65 times of R value.
Internal permanent magnet synchronous motor provided by the invention, by adjusting the direction of magnetization of two sidepiece magnet steel, optimize magnet steel orientation, make the magnet of permanent magnetism groove lay camber line arc core and do not overlap mutually with the magnetization orientation point of permanent magnet in permanent magnetism groove, significantly can improve the integrated quality of motor; Spacing between the magnetization orientation point and the central point of middle magnet steel of permanent magnet in permanent magnetism groove is greater than magnet when laying the radius of curvature of camber line, have " poly-magnetic effect ", can significantly improve the air gap flux density between electric machine rotor, thus effective raising is exerted oneself, overload capacity, power density and efficiency; Spacing between the magnetization orientation point and the central point of middle magnet steel of permanent magnet in permanent magnetism groove is less than magnet when laying the radius of curvature of camber line, motor gas-gap magnetic flux density waveforms can be improved, reduce harmonic component, particularly reduce 3 larger order harmonic components of amplitude, obtain sine wave magnetic field, reduce torque fluctuations, reduce noise and vibrations, even if make motor adopt even air gap, also motor gas-gap magnetic flux density waveforms can significantly be improved, obtain sine wave magnetic field, neither reduce and exert oneself, the torque fluctuations that teeth groove causes can be reduced again.The present invention makes motor integrated quality increase substantially, and realizes high power density, efficient, low fluctuation, low noise and high-precision and stable and runs, realize motor miniaturization and.
Accompanying drawing explanation
Fig. 1 is the radial section schematic diagram of the internal permanent magnet synchronous motor that first embodiment of the invention provides;
Fig. 2, Fig. 3 are the radial section schematic diagrames of the rotor in the internal permanent magnet synchronous motor that provides of first embodiment of the invention;
Fig. 4 is the radial section schematic diagram of the rotor in the internal permanent magnet synchronous motor that provides of second embodiment of the invention;
Fig. 5 is the air gap flux density waveform comparison figure between the internal permanent magnet synchronous motor that provides of second embodiment of the invention and existing motor;
Fig. 6 is the cogging torque waveform comparison figure between the internal permanent magnet synchronous motor that provides of second embodiment of the invention and existing motor.
Embodiment
Illustrate below in conjunction with accompanying drawing and be described in further detail embodiments of the invention, but the present embodiment is not limited to the present invention, every employing analog structure of the present invention and similar change thereof, all should list protection scope of the present invention in.
As shown in Figure 1, a kind of internal permanent magnet synchronous motor that first embodiment of the invention provides, comprises stator 1 and rotor 2, leaves air gap between the inner peripheral surface of described stator 1 and the outer peripheral face of rotor 2;
Described rotor 2 is interval with multiple permanent magnetism groove around the central axis axial symmetry of rotor 2, three permanent magnets 31,32,33 are provided with in each permanent magnetism groove, in three permanent magnets in each permanent magnetism groove, one of them permanent magnet 32 is middle magnet steel, and another two permanent magnets 31,33 are sidepiece magnet steel;
As shown in Figure 2, in the radial section of rotor, following relation is there is: three permanent magnets in permanent magnetism groove are laid successively along a circular arc line M between three permanent magnets in single permanent magnetism groove, and middle magnet steel 32 is positioned at two sidepiece magnet steel 31, between 33, the central point of three permanent magnets all drops on this circular arc line M, this circular arc line M is that the magnet of this permanent magnetism groove lays camber line, it is a circular arc line protruded towards rotor center axis arc that magnet lays camber line M, each permanent magnet is by the arc core E laying camber line M through magnet, and be divided into the consistent block of two shapes through the straight line of this permanent magnet its center point,
As shown in Figure 3, in the radial section of rotor, between three permanent magnets in single permanent magnetism groove, also there is following relation:
1) orientation straight line C1, C2, the C3 of three permanent magnets in permanent magnetism groove intersect at a point D, and this point is the magnetization orientation point of permanent magnet in this permanent magnetism groove;
The orientation straight line of permanent magnet refers to, is parallel to the direction of magnetization of affiliated permanent magnet, and the straight line of central point through affiliated permanent magnet;
In Fig. 3, straight line C1 is the orientation straight line of sidepiece magnet steel 31, and straight line C2 is the orientation straight line of middle magnet steel 32, and straight line C3 is the orientation straight line of sidepiece magnet steel 33;
2) in the middle of, the orientation straight line C2 of magnet steel 32 lays the arc core E of camber line M through the magnet of permanent magnetism groove, and through the axle center of rotor;
3) magnet of permanent magnetism groove lays the arc core E of camber line M, does not overlap mutually with the magnetization orientation point D of permanent magnet in this permanent magnetism groove;
4) spacing between the central point setting the middle magnet steel 32 in the magnetization orientation of permanent magnet in permanent magnetism groove point D and this permanent magnetism groove is as H, the radius of curvature of the magnet laying camber line M of this permanent magnetism groove is R, then there is H > R, and H value is between 1.2 times of R values to 6 times R value, in the present embodiment, H value is preferably 3.6 times of R values.
First embodiment of the invention compared to existing technology in, adopt the permagnetic synchronous motor of the magnet steel of parallel magnetization or the magnet steel composition arc rotor magnetic pole of diametrical magnetization, have good " poly-magnetic effect ", the air gap flux density 8%-10% between electric machine rotor can be significantly improved, due to power output and the Driving Torque of motor, be directly proportional to air gap flux density between rotor, therefore effectively can improve and exert oneself, overload capacity, power density and efficiency, and the mechanical time constant of motor and air gap flux density square are inversely proportional to, acceleration is directly proportional to air gap flux density, therefore significantly mechanical time constant can be reduced, improve fast response characteristic.
As shown in Figure 4, a kind of internal permanent magnet synchronous motor that second embodiment of the invention provides, comprises stators and rotators, leaves air gap between the inner peripheral surface of described stator and the outer peripheral face of rotor;
Described rotor is interval with multiple permanent magnetism groove around the central axis axial symmetry of rotor, three permanent magnets 231,232,233 are provided with in each permanent magnetism groove, in three permanent magnets in each permanent magnetism groove, one of them permanent magnet 232 is middle magnet steel, and another two permanent magnets 231,233 are sidepiece magnet steel;
In the radial section of rotor, following relation is there is: three permanent magnets in permanent magnetism groove are laid successively along a circular arc line M2 between three permanent magnets in single permanent magnetism groove, and middle magnet steel 232 is positioned at two sidepiece magnet steel 231, between 233, the central point of three permanent magnets all drops on this circular arc line M2, this circular arc line M2 is that the magnet of this permanent magnetism groove lays camber line, it is a circular arc line protruded towards rotor center axis arc that magnet lays camber line M2, each permanent magnet is by the arc core E2 laying camber line M2 through magnet, and be divided into the consistent block of two shapes through the straight line of this permanent magnet its center point,
In the radial section of rotor, between three permanent magnets in single permanent magnetism groove, also there is following relation:
1) orientation straight line C21, C22, the C23 of three permanent magnets in permanent magnetism groove intersect at a point D2, and this point is the magnetization orientation point of permanent magnet in this permanent magnetism groove;
The orientation straight line of permanent magnet refers to, is parallel to the direction of magnetization of affiliated permanent magnet, and the straight line of central point through affiliated permanent magnet;
In Fig. 4, straight line C21 is the orientation straight line of sidepiece magnet steel 231, and straight line C22 is the orientation straight line of middle magnet steel 232, and straight line C23 is the orientation straight line of sidepiece magnet steel 233;
2) in the middle of, the orientation straight line C22 of magnet steel 232 lays the arc core E2 of camber line M2 through the magnet of permanent magnetism groove, and through the axle center of rotor;
3) magnet of permanent magnetism groove lays the arc core E2 of camber line M2, does not overlap mutually with the magnetization orientation point D2 of permanent magnet in this permanent magnetism groove;
4) spacing between the central point setting the middle magnet steel 232 in the magnetization orientation of permanent magnet in permanent magnetism groove point D2 and this permanent magnetism groove is as H, the radius of curvature of the magnet laying camber line M2 of this permanent magnetism groove is R, then there is H < R, and H value is between 0.5 times of R value to 0.8 times R value, in the present embodiment, H value is preferably 0.65 times of R value.
Second embodiment of the invention compared to existing technology in, adopt the permagnetic synchronous motor of the magnet steel of parallel magnetization or the magnet steel composition arc rotor magnetic pole of diametrical magnetization, motor gas-gap magnetic flux density waveforms can be improved, reduce harmonic component, particularly reduce 3 larger order harmonic components of amplitude, obtain good sine wave magnetic field, reduce the torque fluctuations that teeth groove causes, reduce noise and vibrations, even if make motor adopt even air gap, also motor gas-gap magnetic flux density waveforms can significantly be improved, obtain sine wave magnetic field, neither reduce and exert oneself, significantly can reduce torque fluctuations again, motor integrated quality can be made to increase substantially, realize high power density, efficiently, low fluctuation, low noise and high-precision and stable are run, realize motor miniaturization and.
As shown in Figure 5, vertical pivot Bg in Fig. 5 is air gap flux density number line, curve S 2 is air gap flux density waveforms of the permagnetic synchronous motor of the magnet steel composition arc rotor magnetic pole of existing employing diametrical magnetization, can find out that curve S 2 is close to trapezoidal wave, curve S 1 is the air gap flux density waveform of the internal permanent magnet synchronous motor of second embodiment of the invention, can find out that curve S 1 is close to sinusoidal wave, the torque fluctuations that teeth groove causes can be effectively reduced, motor integrated quality is increased substantially, realize high power density, efficiently, low fluctuation, low noise and high-precision and stable are run.
As shown in Figure 6, vertical pivot Tcog in Fig. 6 is cogging torque number line, transverse axis O is electrical degree number line, curve K1 is the cogging torque waveform of the permagnetic synchronous motor of the magnet steel composition arc rotor magnetic pole of existing employing diametrical magnetization, its cogging torque Tcog peak value relative value is close to 1, curve K2 is the cogging torque waveform of the internal permanent magnet synchronous motor of second embodiment of the invention, its cogging torque Tcog peak value relative value is 0.13, significantly can reduce the torque fluctuations that teeth groove causes, reduce noise and vibrations, motor integrated quality is increased substantially, meet electromechanical integration and automation occasion to the performance requirement of drive motors, realize industrialization to produce, realize high power density, wide range speed control, fast-response, frequent starting and even running.
Claims (2)
1. an internal permanent magnet synchronous motor, comprises stators and rotators, leaves air gap between the inner peripheral surface of described stator and the outer peripheral face of rotor;
Described rotor is interval with multiple permanent magnetism groove around the central axis axial symmetry of rotor, three permanent magnets are provided with in each permanent magnetism groove, in three permanent magnets in each permanent magnetism groove, one of them permanent magnet is middle magnet steel, and another two permanent magnets are sidepiece magnet steel;
In the radial section of rotor, following relation is there is: three permanent magnets in permanent magnetism groove are laid successively along a circular arc line between three permanent magnets in single permanent magnetism groove, and middle magnet steel is between two sidepiece magnet steel, the central point of three permanent magnets all drops on this circular arc line, this circular arc line is that the magnet of this permanent magnetism groove lays camber line, it is a circular arc line protruded towards rotor center axis arc that magnet lays camber line, each permanent magnet by the arc core laying camber line through magnet, and is divided into the consistent block of two shapes through the straight line of this permanent magnet its center point;
In the radial section of rotor, between three permanent magnets in single permanent magnetism groove, also there is following relation:
1) the orientation straight line intersection of three permanent magnets in permanent magnetism groove is in a bit, and this point is the magnetization orientation point of permanent magnet in this permanent magnetism groove;
The orientation straight line of permanent magnet refers to, is parallel to the direction of magnetization of affiliated permanent magnet, and the straight line of central point through affiliated permanent magnet;
2) in the middle of, the orientation straight line of magnet steel lays the arc core of camber line through the magnet of permanent magnetism groove, and through the axle center of rotor;
3) magnet of permanent magnetism groove lays the arc core of camber line, does not overlap mutually with the magnetization orientation point of permanent magnet in this permanent magnetism groove;
In the radial section of rotor, following relation is also there is: the spacing between the central point setting the middle magnet steel in the magnetization orientation of permanent magnet in permanent magnetism groove point and this permanent magnetism groove is as H between three permanent magnets in single permanent magnetism groove, the radius of curvature of the magnet laying camber line of this permanent magnetism groove is R, it is characterized in that: H value is 3.6 times of R values.
2. an internal permanent magnet synchronous motor, comprises stators and rotators, leaves air gap between the inner peripheral surface of described stator and the outer peripheral face of rotor;
Described rotor is interval with multiple permanent magnetism groove around the central axis axial symmetry of rotor, three permanent magnets are provided with in each permanent magnetism groove, in three permanent magnets in each permanent magnetism groove, one of them permanent magnet is middle magnet steel, and another two permanent magnets are sidepiece magnet steel;
In the radial section of rotor, following relation is there is: three permanent magnets in permanent magnetism groove are laid successively along a circular arc line between three permanent magnets in single permanent magnetism groove, and middle magnet steel is between two sidepiece magnet steel, the central point of three permanent magnets all drops on this circular arc line, this circular arc line is that the magnet of this permanent magnetism groove lays camber line, it is a circular arc line protruded towards rotor center axis arc that magnet lays camber line, each permanent magnet by the arc core laying camber line through magnet, and is divided into the consistent block of two shapes through the straight line of this permanent magnet its center point;
In the radial section of rotor, between three permanent magnets in single permanent magnetism groove, also there is following relation:
1) the orientation straight line intersection of three permanent magnets in permanent magnetism groove is in a bit, and this point is the magnetization orientation point of permanent magnet in this permanent magnetism groove;
The orientation straight line of permanent magnet refers to, is parallel to the direction of magnetization of affiliated permanent magnet, and the straight line of central point through affiliated permanent magnet;
2) in the middle of, the orientation straight line of magnet steel lays the arc core of camber line through the magnet of permanent magnetism groove, and through the axle center of rotor;
3) magnet of permanent magnetism groove lays the arc core of camber line, does not overlap mutually with the magnetization orientation point of permanent magnet in this permanent magnetism groove;
In the radial section of rotor, following relation is also there is: the spacing between the central point setting the middle magnet steel in the magnetization orientation of permanent magnet in permanent magnetism groove point and this permanent magnetism groove is as H between three permanent magnets in single permanent magnetism groove, the radius of curvature of the magnet laying camber line of this permanent magnetism groove is R, it is characterized in that: H value is 0.65 times of R value.
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| CN201210579675.7A CN103078464B (en) | 2012-12-27 | 2012-12-27 | Built-in permanent magnet synchronous motor |
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| CN201210579675.7A CN103078464B (en) | 2012-12-27 | 2012-12-27 | Built-in permanent magnet synchronous motor |
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| CN103078464B true CN103078464B (en) | 2015-04-22 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6709522B2 (en) * | 2015-09-29 | 2020-06-17 | ダイキン工業株式会社 | Rotor |
| CN206041676U (en) * | 2016-09-05 | 2017-03-22 | 安徽美芝制冷设备有限公司 | A compressor that is used for reciprocating compressor's frequency conversion rotor and has it |
| CN108173402A (en) * | 2018-01-21 | 2018-06-15 | 湖北西浦电机科技有限责任公司 | The salient pole synchronous electric machine of double eccentric arc field structures |
| CN109149823B (en) * | 2018-11-07 | 2023-11-14 | 珠海格力节能环保制冷技术研究中心有限公司 | Motor rotor and motor |
| JP7177442B2 (en) * | 2019-06-13 | 2022-11-24 | 株式会社ダイドー電子 | Permanent magnet rotors and rotating electrical machines |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1098568A (en) * | 1993-05-26 | 1995-02-08 | 株式会社东芝 | Permanent magnet motor |
| CN201312221Y (en) * | 2008-07-31 | 2009-09-16 | 上海电科电机科技有限公司 | Internal permanent magnet synchronous motor rotor structure |
| CN102355071A (en) * | 2011-09-28 | 2012-02-15 | 苏州和鑫电气股份有限公司 | Built-in permanent-magnetic motor rotor and motor comprising same |
| CN102761217A (en) * | 2012-08-02 | 2012-10-31 | 山东呈瑞新能源科技有限公司 | Integral type steel magnet of high-performance permanent magnetic synchronous motor |
| US20120293033A1 (en) * | 2011-05-19 | 2012-11-22 | Denso Corporation | Rotor for electric rotating machine |
| CN202978655U (en) * | 2012-12-27 | 2013-06-05 | 上海特波电机有限公司 | Built-in permanent-magnet synchronous motor |
-
2012
- 2012-12-27 CN CN201210579675.7A patent/CN103078464B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1098568A (en) * | 1993-05-26 | 1995-02-08 | 株式会社东芝 | Permanent magnet motor |
| CN201312221Y (en) * | 2008-07-31 | 2009-09-16 | 上海电科电机科技有限公司 | Internal permanent magnet synchronous motor rotor structure |
| US20120293033A1 (en) * | 2011-05-19 | 2012-11-22 | Denso Corporation | Rotor for electric rotating machine |
| CN102355071A (en) * | 2011-09-28 | 2012-02-15 | 苏州和鑫电气股份有限公司 | Built-in permanent-magnetic motor rotor and motor comprising same |
| CN102761217A (en) * | 2012-08-02 | 2012-10-31 | 山东呈瑞新能源科技有限公司 | Integral type steel magnet of high-performance permanent magnetic synchronous motor |
| CN202978655U (en) * | 2012-12-27 | 2013-06-05 | 上海特波电机有限公司 | Built-in permanent-magnet synchronous motor |
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