CN211377723U - Rotor core of permanent magnet synchronous motor - Google Patents
Rotor core of permanent magnet synchronous motor Download PDFInfo
- Publication number
- CN211377723U CN211377723U CN202020159983.4U CN202020159983U CN211377723U CN 211377723 U CN211377723 U CN 211377723U CN 202020159983 U CN202020159983 U CN 202020159983U CN 211377723 U CN211377723 U CN 211377723U
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- magnetic steel
- punching sheet
- permanent magnet
- rotor core
- synchronous motor
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Abstract
The utility model relates to a permanent magnet synchronous motor rotor core, including towards piece combination, well damping strip and magnet steel combination, inlay the well damping strip that is equipped with a plurality of angular distributions such as along the circumferencial direction towards piece combination edge, inlay the magnet steel combination that is equipped with a plurality of angular distributions such as along the circumferencial direction in the towards piece combination, the magnet steel combination includes 11 magnet steels that adopt Halbach array to arrange; the punching sheet combination comprises a plurality of punching sheets which are sequentially overlapped; the utility model discloses need not to be equipped with converter equipment and relevant relay protection device to simplify the structure, reduced manufacturing cost, and effectively improved motor efficiency.
Description
Technical Field
The utility model relates to a PMSM rotor core.
Background
The motor systems used in the domestic heavy industry mostly adopt an induction motor (a low-rotation-speed motor with the rotation speed of 3000 r/min) as a driving system, the induction motor has high energy consumption, the whole system has large volume, and a large amount of raw materials are consumed; the weight of the permanent magnet synchronous motor technology is only 1/10 of that of the traditional motor, a speed increasing box is omitted, the size is greatly reduced, the efficiency is greatly improved, and the energy can be saved by 30% -40%, so that the permanent magnet synchronous motor is more and more widely applied to industrial production in recent years to replace the traditional induction motor, and is one of effective ways for promoting the smooth realization of the energy-saving and emission-reducing targets
The permanent magnet synchronous motor is a synchronous motor which generates a synchronous rotating magnetic field by permanent magnet excitation, the permanent magnet is used as a rotor to generate the rotating magnetic field, a three-phase stator winding is reacted through an armature under the action of the rotating magnetic field to induce three-phase symmetrical current, a frequency converter device and a related relay protection device are required to be simultaneously equipped on the rotor of the existing permanent magnet synchronous motor, the structure is complex, the manufacturing cost is high, the motor efficiency is not high, and the improvement is required.
SUMMERY OF THE UTILITY MODEL
To the current situation of above-mentioned prior art, the utility model aims to solve the technical problem that a structure has been simplified is provided, manufacturing cost has been reduced to the PMSM rotor core of motor efficiency has effectively been improved.
The utility model provides a technical scheme that above-mentioned technical problem adopted does: a permanent magnet synchronous motor rotor core is characterized by comprising a punching sheet combination, a middle damping strip and a magnetic steel combination, wherein a plurality of middle damping strips which are distributed at equal angles along the circumferential direction are embedded in the edge of the punching sheet combination, the middle damping strip is a brass bar, a plurality of magnetic steel combinations which are distributed at equal angles along the circumferential direction are embedded in the punching sheet combination, and the plurality of magnetic steel combinations are all arranged on the inner sides of the plurality of middle damping strips; the magnetic steel combination comprises 11 magnetic steels distributed in a Halbach array; the magnetic steel adopts neodymium iron boron magnetic steel with the brand number of N38 SH; the punching sheet combination comprises a plurality of punching sheets which are sequentially overlapped, and the punching sheets are made of silicon steel materials with the mark number of 50W 470.
Preferably, the center of the punching sheet is provided with a shaft hole.
Preferably, a plurality of through holes are formed in the edge of the punching sheet, the number of the through holes is the same as that of the middle damping strips, and the middle damping strips are respectively inserted into the through holes.
Preferably, a notch groove is formed in the inner wall of the outer side of each through hole.
Preferably, a plurality of slotted holes which are distributed at equal angles along the circumferential direction are formed in the punching sheet, the number of the slotted holes is the same as that of the magnetic steel combinations, and the magnetic steel combinations are respectively inserted into the slotted holes.
Preferably, still set up a plurality of ventilation holes that distribute along the equidistance angle of circumferencial direction in the punching sheet, it is a plurality of the inboard of a plurality of slotted holes is all located to the ventilation hole.
Compared with the prior art, the utility model has the advantages of: the utility model discloses need not to be equipped with converter equipment and relevant relay protection device to simplify the structure, reduced manufacturing cost, and effectively improved motor efficiency.
Drawings
Fig. 1 is a sectional structure view of the present invention.
Detailed Description
As shown in fig. 1, a rotor core of a permanent magnet synchronous motor comprises a punching sheet combination, a middle damping strip 2 and a magnetic steel combination, wherein a plurality of middle damping strips 2 which are distributed at equal angles along the circumferential direction are embedded in the edge of the punching sheet combination, and the middle damping strips 2 are brass bars; a plurality of magnetic steel combinations which are distributed at equal angles along the circumferential direction are embedded in the punching sheet combination, and the plurality of magnetic steel combinations are all arranged on the inner sides of the plurality of middle damping strips 2; the magnetic steel combination comprises 11 magnetic steels 3 distributed in a Halbach array; the magnetic steel 3 is neodymium iron boron magnetic steel with the trademark of N38SH, the punching sheet combination comprises a plurality of punching sheets 1 which are sequentially overlapped, the punching sheets 1 are made of silicon steel with the trademark of 50W470, the center of the punching sheet 1 is provided with a shaft hole 11, the edge of the punching sheet 1 is provided with a plurality of through holes 12, the number of the through holes 12 is the same as that of the middle damping strips 2, the middle damping strips 2 are respectively inserted into the through holes 12, and the inner wall of the outer side of each through hole 12 is provided with a notch groove 13; a plurality of slotted holes 14 which are distributed at equal angles along the circumferential direction are formed in the punching sheet 1, the number of the slotted holes 14 is the same as that of the magnetic steel combinations, and the plurality of magnetic steel combinations are respectively inserted into the plurality of slotted holes 14; the punching sheet 1 is also provided with a plurality of ventilation holes 4 which are distributed at equal angles along the circumferential direction, and the ventilation holes 4 are all arranged on the inner sides of the slotted holes 14; the Halbach array is a magnet structure that is an engineered, near-ideal structure, with the goal of producing the strongest magnetic field with the least amount of magnet, as discovered by klaus Halbach, the american scholar, in 1979, as an electron acceleration experiment, and gradually perfecting this structure, ultimately forming the so-called Halbach array.
When in use, the rotating shaft is inserted into the shaft hole 11 fixed on each punching sheet 1, and then each magnetic steel combination is embedded into a corresponding slot hole 14 by means of a special mounting die; and finally, arranging aluminum alloy end plates with the thickness of 10mm at two ends of the punching sheet combination for packaging and fixing the magnetic steel combination.
The permanent magnet synchronous motor is a synchronous motor which generates a synchronous rotating magnetic field by permanent magnet excitation, the permanent magnet is used as a rotor to generate the rotating magnetic field, a three-phase stator winding is reacted through an armature under the action of the rotating magnetic field to induce three-phase symmetrical current, and the rotor of the existing permanent magnet synchronous motor needs to be simultaneously provided with a frequency converter device and a related relay protection device, so that the structure is complex, the manufacturing cost is high, and the motor efficiency is not high; the utility model discloses need not to be equipped with converter equipment and relevant relay protection device to simplify the structure, reduced manufacturing cost, and effectively improved motor efficiency.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art that various changes in the embodiments and modifications thereof may be made, and equivalents may be substituted for elements thereof; such modifications and substitutions do not depart from the spirit and scope of the present invention in its corresponding aspects.
Claims (6)
1. A permanent magnet synchronous motor rotor core is characterized by comprising a punching sheet combination, a middle damping strip and a magnetic steel combination, wherein a plurality of middle damping strips which are distributed at equal angles along the circumferential direction are embedded in the edge of the punching sheet combination, the middle damping strip is a brass bar, a plurality of magnetic steel combinations which are distributed at equal angles along the circumferential direction are embedded in the punching sheet combination, and the plurality of magnetic steel combinations are all arranged on the inner sides of the plurality of middle damping strips; the magnetic steel combination comprises 11 magnetic steels distributed in a Halbach array; the magnetic steel adopts neodymium iron boron magnetic steel with the brand number of N38 SH; the punching sheet combination comprises a plurality of punching sheets which are sequentially overlapped, and the punching sheets are made of silicon steel materials with the mark number of 50W 470.
2. The rotor core of the permanent magnet synchronous motor according to claim 1, wherein a shaft hole is formed in the center of the punching sheet.
3. The rotor core of the permanent magnet synchronous motor according to claim 1, wherein a plurality of through holes are formed in the edge of the punching sheet, the number of the through holes is the same as that of the middle damping bars, and the middle damping bars are respectively inserted into the through holes.
4. The rotor core of a PMSM according to claim 3 wherein each of the through holes has a notch groove formed in the outer inner wall thereof.
5. The rotor core of the permanent magnet synchronous motor according to claim 1, wherein a plurality of slots are formed in the punching sheet and distributed at equal angles along the circumferential direction, the number of the slots is the same as that of the magnetic steel combinations, and the magnetic steel combinations are respectively inserted into the slots.
6. The rotor core of the permanent magnet synchronous motor according to claim 1, wherein a plurality of ventilation holes are formed in the punching sheet and distributed at equal angles along the circumferential direction, and the ventilation holes are all arranged on the inner sides of the slotted holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020159983.4U CN211377723U (en) | 2020-02-11 | 2020-02-11 | Rotor core of permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020159983.4U CN211377723U (en) | 2020-02-11 | 2020-02-11 | Rotor core of permanent magnet synchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211377723U true CN211377723U (en) | 2020-08-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020159983.4U Active CN211377723U (en) | 2020-02-11 | 2020-02-11 | Rotor core of permanent magnet synchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211377723U (en) |
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2020
- 2020-02-11 CN CN202020159983.4U patent/CN211377723U/en active Active
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