CN202978655U - Built-in permanent-magnet synchronous motor - Google Patents
Built-in permanent-magnet synchronous motor Download PDFInfo
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- CN202978655U CN202978655U CN 201220734235 CN201220734235U CN202978655U CN 202978655 U CN202978655 U CN 202978655U CN 201220734235 CN201220734235 CN 201220734235 CN 201220734235 U CN201220734235 U CN 201220734235U CN 202978655 U CN202978655 U CN 202978655U
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- permanent
- magnet
- permanent magnetism
- magnetism groove
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Abstract
The utility model discloses a built-in permanent-magnet synchronous motor, and relates to the field of motor technology, so as to solve the technical problem of improving comprehensive qualities of motors. A plurality of permanent-magnet grooves are symmetrically arranged at intervals along the central axis of the rotor on the rotor of the motor; and each permanent-magnet groove is internally provided with three permanent magnets laid in an arc belt shape, one permanent magnet is a middle magnetic steel and the other two are side magnetic steels. The built-in permanent-magnet synchronous motor is characterized in that the middle magnetic steel adopts normal magnetization vertical to the surface of the magnetic steel, and each of the two side magnetic steels adopts abnormal magnetization, such that the arc core of the laying arc of magnets in the permanent-magnet groove is not coincident with the magnetization orientation point of each permanent magnet in the permanent-magnet groove. The motor provided by the utility model can greatly improve the comprehensive qualities of the motor.
Description
Technical field
The utility model relates to motor technology, particularly relates to a kind of technology of internal permanent magnet synchronous motor.
Background technology
That electromechanical integration and automation occasion more and more require is efficient, energy-conservation, low noise, intellectuality, to being the requirement that its supporting motor proposes high efficiency, low noise, high output, fast-response, and at present many magnetoes exist defectives such as Electro Magnetic Compatibility is poor, noise large, it is little to exert oneself, torque fluctuations is large, overload capacity is low and power density is low.
All stud with rotor magnetic pole on the rotor of permagnetic synchronous motor, rotor magnetic pole is formed by banded laying of multistage magnet steel (being generally three sections) arc, 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 magnet steel is parallel; 2) radial oriented magnetic pole, in this magnetic pole, the direction of magnetization of each section magnet steel is normal direction, namely perpendicular to the magnet steel surface.Existing permagnetic synchronous motor has many good qualities, as cancel mechanical commutator and brush, maintenance less, efficient is high, but its armature field is the rotating magnetic field of non-circular great-jump-forward, torque fluctuations is original just larger, add slot effect, have larger torque fluctuations, affect that motor is efficient, wide range speed control, steadily low noise operation, the integrated quality of therefore existing permagnetic synchronous motor is all relatively poor.
The utility model content
For the defective that exists in above-mentioned prior art, technical problem to be solved in the utility model is to provide a kind of internal permanent magnet synchronous motor that can significantly improve the 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 utility model comprises stator and rotor, leaves air gap between the inner peripheral surface of described stator and the outer peripheral face of rotor;
Central axis axial symmetry around rotor on described rotor is interval with a plurality of permanent magnetism grooves, be provided with three permanent magnets 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 the sidepiece magnet steel;
In the radial section of rotor, have following relation between three permanent magnets in single permanent magnetism groove: three permanent magnets in the permanent magnetism groove are laid successively along a circular arc line, 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 is laid camber line, it is a circular arc line towards rotor center axis arc protrusion that magnet is laid camber line, each permanent magnet is by the arc core through magnet laying camber line, and the straight line of process this permanent magnet self central point is divided into two blocks that shape is consistent;
It is characterized in that, in the radial section of rotor, also have following relation between three permanent magnets in single permanent magnetism groove:
1) the orientation straight line of three permanent magnets in the permanent magnetism groove intersects at a point, 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, the direction of magnetization of permanent magnet under being parallel to, and the straight line of the central point of the affiliated permanent magnet of process;
2) in the middle of, the orientation straight line of magnet steel is laid the arc core of camber line through the magnet of permanent magnetism groove, and the axle center of process rotor;
3) magnet of permanent magnetism groove is laid 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, also have following relation between three permanent magnets in single permanent magnetism groove: the spacing of establishing between the central point of the interior middle magnet steel of the magnetization orientation point of permanent magnet in the permanent magnetism groove and this permanent magnetism groove is H, the radius of curvature that the magnet of this permanent magnetism groove is laid camber line is R, H＞R is arranged, and the H value is between 1.2 times of R values to 6 times R value.
Further, the H value is 3.6 times of R values.
Further, in the radial section of rotor, also have following relation between three permanent magnets in single permanent magnetism groove: the spacing of establishing between the central point of the interior middle magnet steel of the magnetization orientation point of permanent magnet in the permanent magnetism groove and this permanent magnetism groove is H, the radius of curvature that the magnet of this permanent magnetism groove is laid camber line is, H＜R is arranged, and the H value is between 0.5 times of R value to 0.8 times R value.
Further, the H value is 0.65 times of R value.
The internal permanent magnet synchronous motor that the utility model provides, by adjusting the direction of magnetization of two sidepiece magnet steel, optimize the magnet steel orientation, make the magnet laying camber line arc core of permanent magnetism groove not overlap mutually with the magnetization orientation point of the interior permanent magnet of permanent magnetism groove, can significantly improve the integrated quality of motor; When the spacing between the central point of the magnetization orientation point of permanent magnet in the permanent magnetism groove and middle magnet steel is laid the radius of curvature of camber line greater than magnet, " poly-magnetic effect " arranged, can significantly improve the air gap flux density between electric machine rotor, thus effectively improve exert oneself, overload capacity, power density and efficient; When the spacing between the central point of the magnetization orientation point of permanent magnet in the permanent magnetism groove and middle magnet steel is laid the radius of curvature of camber line less than magnet, can improve the motor gas-gap magnetic flux density waveforms, 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 make motor adopt even air gap, also can significantly improve the motor gas-gap magnetic flux density waveforms, obtain sine wave magnetic field, neither reduce and exert oneself, can reduce the torque fluctuations that teeth groove causes again.The utility model increases substantially the motor integrated quality, realizes high power density, efficient, low fluctuation, low noise and high-precision and stable operation, realizes the motor miniaturization and.
Description of drawings
Fig. 1 is the radial section schematic diagram of the internal permanent magnet synchronous motor that provides of the utility model the first embodiment;
Fig. 2, Fig. 3 are the radial section schematic diagrames of the rotor in the internal permanent magnet synchronous motor that provides of the utility model the first embodiment;
Fig. 4 is the radial section schematic diagram of the rotor in the internal permanent magnet synchronous motor that provides of the utility model the second embodiment;
Fig. 5 is the internal permanent magnet synchronous motor that provides of the utility model the second embodiment and the air gap flux density waveform comparison diagram between existing motor;
Fig. 6 is the internal permanent magnet synchronous motor that provides of the utility model the second embodiment and the cogging torque waveform comparison diagram between existing motor.
Embodiment
Below in conjunction with description of drawings, embodiment of the present utility model is described in further detail, but the present embodiment is not limited to the utility model, every employing analog structure of the present utility model and similar variation thereof all should be listed protection range of the present utility model in.
As shown in Figure 1, a kind of internal permanent magnet synchronous motor that the utility model the first embodiment provides comprises stator 1 and rotor 2, leaves air gap between the outer peripheral face of the inner peripheral surface of described stator 1 and rotor 2;
Central axis axial symmetry around rotor 2 on described rotor 2 is interval with a plurality of permanent magnetism grooves, be provided with three permanent magnets 31,32,33 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 the sidepiece magnet steel;
as shown in Figure 2, in the radial section of rotor, have following relation between three permanent magnets in single permanent magnetism groove: three permanent magnets in the permanent magnetism groove are laid successively along a circular arc line M, 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 is laid camber line, it is a circular arc line towards rotor center axis arc protrusion that magnet is laid camber line M, each permanent magnet is by lay the arc core E of camber line M through magnet, and the straight line through this permanent magnet self central point is divided into two blocks that shape is consistent,
As shown in Figure 3, in the radial section of rotor, also there is following relation between three permanent magnets in single permanent magnetism groove:
1) orientation straight line C1, C2, the C3 of three permanent magnets in the permanent magnetism groove D that intersects at a point, this point is the magnetization orientation point of permanent magnet in this permanent magnetism groove;
The orientation straight line of permanent magnet refers to, the direction of magnetization of permanent magnet under being parallel to, and the straight line of the central point of the affiliated permanent magnet of process;
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 the axle center of process rotor;
3) magnet of permanent magnetism groove is laid 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;
The spacing of 4) establishing between the central point of the interior middle magnet steel 32 of the magnetization orientation point D of permanent magnet in the permanent magnetism groove and this permanent magnetism groove is H, the radius of curvature that the magnet of this permanent magnetism groove is laid camber line M is R, H＞R is arranged, and the H value is between 1.2 times of R values to 6 times R value, and in the present embodiment, the H value is preferably 3.6 times of R values.
the utility model the first embodiment compared to existing technology in, adopt the permagnetic synchronous motor of the magnet steel composition arc rotor magnetic pole of parallel magnetized magnet steel or diametrical magnetization, have good " poly-magnetic effect ", can significantly improve the air gap flux density 8%-10% between electric machine rotor, power output and output torque due to motor, be directly proportional to air gap flux density between rotor, therefore can effectively improve and exert oneself, overload capacity, power density and efficient, 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 can significantly reduce mechanical time constant, improve fast response characteristic.
As shown in Figure 4, a kind of internal permanent magnet synchronous motor that the utility model the second embodiment provides comprises stator and rotor, leaves air gap between the inner peripheral surface of described stator and the outer peripheral face of rotor;
Central axis axial symmetry around rotor on described rotor is interval with a plurality of permanent magnetism grooves, be provided with three permanent magnets 231,232,233 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 the sidepiece magnet steel;
in the radial section of rotor, have following relation between three permanent magnets in single permanent magnetism groove: three permanent magnets in the permanent magnetism groove are laid successively along a circular arc line M2, 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 is laid camber line, it is a circular arc line towards rotor center axis arc protrusion that magnet is laid camber line M2, each permanent magnet is by lay the arc core E2 of camber line M2 through magnet, and the straight line through this permanent magnet self central point is divided into two blocks that shape is consistent,
In the radial section of rotor, also there is following relation between three permanent magnets in single permanent magnetism groove:
1) orientation straight line C21, C22, the C23 of three permanent magnets in the permanent magnetism groove D2 that intersects at a point, this point is the magnetization orientation point of permanent magnet in this permanent magnetism groove;
The orientation straight line of permanent magnet refers to, the direction of magnetization of permanent magnet under being parallel to, and the straight line of the central point of the affiliated permanent magnet of process;
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 the axle center of process rotor;
3) magnet of permanent magnetism groove is laid 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;
The spacing of 4) establishing between the central point of the interior middle magnet steel 232 of the magnetization orientation point D2 of permanent magnet in the permanent magnetism groove and this permanent magnetism groove is H, the radius of curvature that the magnet of this permanent magnetism groove is laid camber line M2 is R, H＜R is arranged, and the H value is between 0.5 times of R value to 0.8 times R value, and in the present embodiment, the H value is preferably 0.65 times of R value.
the utility model the second embodiment compared to existing technology in, adopt the permagnetic synchronous motor of the magnet steel composition arc rotor magnetic pole of parallel magnetized magnet steel or diametrical magnetization, can improve the motor gas-gap magnetic flux density waveforms, 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 make motor adopt even air gap, also can significantly improve the motor gas-gap magnetic flux density waveforms, obtain sine wave magnetic field, neither reduce and exert oneself, again can the decrease torque fluctuations, the motor integrated quality is increased substantially, realize high power density, efficiently, low fluctuation, low noise and high-precision and stable operation, realize the motor miniaturization and.
as shown in Figure 5, vertical pivot Bg in Fig. 5 is the air gap flux density number line, curve S 2 is air gap flux density waveforms that the magnet steel of existing employing diametrical magnetization forms the permagnetic synchronous motor of arc rotor magnetic pole, can find out that curve S 2 is near trapezoidal wave, curve S 1 is the air gap flux density waveform of the internal permanent magnet synchronous motor of the utility model the second embodiment, can find out that curve S 1 approaches sinusoidal wave, can effectively reduce the torque fluctuations that teeth groove causes, the motor integrated quality is increased substantially, realize high power density, efficiently, low fluctuation, low noise and high-precision and stable operation.
as shown in Figure 6, vertical pivot Tcog in Fig. 6 is the cogging torque number line, transverse axis O is the electrical degree number line, curve K1 is the cogging torque waveform that the magnet steel of existing employing diametrical magnetization forms the permagnetic synchronous motor of arc rotor magnetic pole, its cogging torque Tcog peak value relative value is near 1, curve K2 is the cogging torque waveform of the internal permanent magnet synchronous motor of the utility model the second embodiment, its cogging torque Tcog peak value relative value is 0.13, but the torque fluctuations that the decrease teeth groove causes, reduce noise and vibrations, the motor integrated quality is increased substantially, satisfy electromechanical integration and automation occasion to the performance requirement of drive motors, realize industrialization production, realize high power density, wide range speed control, fast-response, frequent starting and even running.
Claims (5)
1. an internal permanent magnet synchronous motor, comprise stator and rotor, leaves air gap between the inner peripheral surface of described stator and the outer peripheral face of rotor;
Central axis axial symmetry around rotor on described rotor is interval with a plurality of permanent magnetism grooves, be provided with three permanent magnets 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 the sidepiece magnet steel;
In the radial section of rotor, have following relation between three permanent magnets in single permanent magnetism groove: three permanent magnets in the permanent magnetism groove are laid successively along a circular arc line, 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 is laid camber line, it is a circular arc line towards rotor center axis arc protrusion that magnet is laid camber line, each permanent magnet is by the arc core through magnet laying camber line, and the straight line of process this permanent magnet self central point is divided into two blocks that shape is consistent;
It is characterized in that, in the radial section of rotor, also have following relation between three permanent magnets in single permanent magnetism groove:
1) the orientation straight line of three permanent magnets in the permanent magnetism groove intersects at a point, 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, the direction of magnetization of permanent magnet under being parallel to, and the straight line of the central point of the affiliated permanent magnet of process;
2) in the middle of, the orientation straight line of magnet steel is laid the arc core of camber line through the magnet of permanent magnetism groove, and the axle center of process rotor;
3) magnet of permanent magnetism groove is laid the arc core of camber line, does not overlap mutually with the magnetization orientation point of permanent magnet in this permanent magnetism groove.
2. internal permanent magnet synchronous motor according to claim 1, it is characterized in that, in the radial section of rotor, also have following relation between three permanent magnets in single permanent magnetism groove: the spacing of establishing between the central point of the interior middle magnet steel of the magnetization orientation point of permanent magnet in the permanent magnetism groove and this permanent magnetism groove is H, the radius of curvature that the magnet of this permanent magnetism groove is laid camber line is R, H＞R is arranged, and the H value is between 1.2 times of R values to 6 times R value.
3. internal permanent magnet synchronous motor according to claim 2, it is characterized in that: the H value is 3.6 times of R values.
4. internal permanent magnet synchronous motor according to claim 1, it is characterized in that, in the radial section of rotor, also have following relation between three permanent magnets in single permanent magnetism groove: the spacing of establishing between the central point of the interior middle magnet steel of the magnetization orientation point of permanent magnet in the permanent magnetism groove and this permanent magnetism groove is H, the radius of curvature that the magnet of this permanent magnetism groove is laid camber line is, H＜R is arranged, and the H value is between 0.5 times of R value to 0.8 times R value.
5. internal permanent magnet synchronous motor according to claim 4, it is characterized in that: the H value is 0.65 times of R value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220734235 CN202978655U (en) | 2012-12-27 | 2012-12-27 | Built-in permanent-magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220734235 CN202978655U (en) | 2012-12-27 | 2012-12-27 | Built-in permanent-magnet synchronous motor |
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| Publication Number | Publication Date |
|---|---|
| CN202978655U true CN202978655U (en) | 2013-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220734235 Withdrawn - After Issue CN202978655U (en) | 2012-12-27 | 2012-12-27 | Built-in permanent-magnet synchronous motor |
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| CN (1) | CN202978655U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103078464A (en) * | 2012-12-27 | 2013-05-01 | 上海特波电机有限公司 | Built-in permanent magnet synchronous motor |
| CN110635594A (en) * | 2019-08-26 | 2019-12-31 | 杭州电子科技大学 | Novel permanent magnet synchronous motor rotor structure for electric automobile |
-
2012
- 2012-12-27 CN CN 201220734235 patent/CN202978655U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103078464A (en) * | 2012-12-27 | 2013-05-01 | 上海特波电机有限公司 | Built-in permanent magnet synchronous motor |
| CN103078464B (en) * | 2012-12-27 | 2015-04-22 | 上海特波电机有限公司 | Built-in permanent magnet synchronous motor |
| CN110635594A (en) * | 2019-08-26 | 2019-12-31 | 杭州电子科技大学 | Novel permanent magnet synchronous motor rotor structure for electric automobile |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130605 Effective date of abandoning: 20150422 |