CN212063660U - Double-speed permanent magnet synchronous motor rotor and motor - Google Patents
Double-speed permanent magnet synchronous motor rotor and motor Download PDFInfo
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- CN212063660U CN212063660U CN202020914410.8U CN202020914410U CN212063660U CN 212063660 U CN212063660 U CN 212063660U CN 202020914410 U CN202020914410 U CN 202020914410U CN 212063660 U CN212063660 U CN 212063660U
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Abstract
The utility model provides a double speed PMSM rotor and motor, includes rotor body and sets up a plurality of magnet steel groove groups in this internal, and the magnet steel groove group distributes along rotor body's rotation axis circumference, and the magnet steel groove group includes one or more first magnet steel groove, second magnet steel groove and third magnet steel groove, and first magnet steel groove is V type with second magnet steel groove and arranges and the opening is towards motor stator one side, and the third magnet steel groove sets up the opening side in first magnet steel groove and second magnet steel groove. The multi-layer inverted triangular arc magnetic steel arrangement is adopted, the magnetic energy accumulation of the rotor is enhanced, the torque output of the motor is large under low-speed operation, and the torque is output at high speed and constant power.
Description
Technical Field
The utility model relates to a motor field, more specifically the utility model relates to a double speed PMSM rotor and motor that says so.
Background
The permanent magnet synchronous motor is a synchronous motor which generates synchronous rotating magnetic fields by permanent magnet excitation. Classifying according to the installation positions of the permanent magnets: surface Permanent Magnet Synchronous Machines (SPMSM) and Interior Permanent Magnet Synchronous Machines (IPMSM). Classifying according to the response potential waveform of the stator winding: sine wave permanent magnet synchronous motor, brushless permanent magnet direct current motor. The permanent magnet synchronous motor has the advantages of large power factor, low loss, flexible shape and size, simple structure, high power and the like. The motor in the prior art is unstable when running at high and low speeds, and aims to provide a motor for special equipment which can output constant power at a high speed and constant torque at a low speed.
SUMMERY OF THE UTILITY MODEL
The utility model provides a weak point to prior art the utility model provides a double speed PMSM rotor, include rotor body and set up this internal a plurality of magnet steel groove groups, magnet steel groove group along rotor body's rotation axis circumference distributes, magnet steel groove group includes one or more first magnet steel groove, second magnet steel groove and third magnet steel groove, first magnet steel groove with second magnet steel groove is V type and arranges and open towards motor stator one side, third magnet steel groove sets up first magnet steel groove with the opening side in second magnet steel groove.
The magnetic steel groove group, one or more of the first magnetic steel groove, the second magnetic steel groove and the third magnetic steel groove form a multilayer triangular magnetic steel array, magnetic steel is arranged in the first magnetic steel groove, the second magnetic steel groove and the third magnetic steel groove, magnetic energy accumulation of the rotor is enhanced, torque output of the motor is large under low-speed operation, and torque can be output at high speed and constant power.
The utility model discloses a first magnet steel groove with contained angle between the second magnet steel groove is 60 and is less than or equal to alpha and is less than or equal to 160.
The utility model discloses a first magnet steel groove with the strengthening rib has between the second magnet steel groove, the width of strengthening rib is 1-5 mm.
The utility model discloses a region between first magnet steel groove, second magnet steel groove and the third magnet steel groove is provided with one or more auxiliary hole.
The auxiliary holes have the effect of magnetic isolation, the loss of a rotor core and the loss of magnetic steel eddy current can be reduced, the influence of higher harmonics on the vibration and noise of the motor is reduced, and the high efficiency and reliability of the motor in high-speed operation are ensured.
The utility model discloses an offer the auxiliary groove that a plurality of circumferences distribute on the periphery in rotor body shaft hole, the auxiliary groove is the arc wall.
The auxiliary groove can enable the matching between the rotor and the rotating shaft to be more stable, improves the counter electromotive force harmonic waves of the motor, and enables the motor to be more reliable and efficient during operation.
The third magnet steel groove is the arc wire groove, including first long limit and the long limit of second and two minor faces, first long limit is close to motor stator one side, the long limit of second is close to first magnet steel groove, second magnet steel groove one side, the long limit of second is provided with an expansion tank on the limit at least, the expansion tank is the arc wall.
The third magnetic steel groove is arc-shaped and bent towards the direction of the rotor rotating shaft, heat can be generated between the rotor and the stator due to the fact that the motor rotor rotates at a high speed, the magnetic steel groove can also generate heat, the heat enables the rotor to generate certain thermal deformation, the position of the magnetic steel groove is most obvious and serious, and the existence of the expansion groove can effectively prevent the magnetic steel groove from being deformed seriously or being thermally damaged. Secondly because the third magnetic steel groove is the arc line type, the long limit of second the expansion tank meets thermal expansion and can be to the further spacing effect of magnet steel, avoids the magnet steel to take place the skew to reduce the noise of vibration, also reduced the probability of motor demagnetization, increased the security performance.
First magnetism steel groove with second magnetism steel groove is the arc wall and towards the third magnetism steel groove direction is crooked, first magnetism steel groove with be provided with the expansion tank on the second magnetism steel groove, the expansion tank is the arc wall.
Wherein, the existence of inflation groove can effectually prevent that the magnet steel groove from warping seriously or taking place thermal damage, avoids the magnet steel to take place the skew to reduce the noise of vibration, also reduced the probability of motor demagnetization, increased the security performance
The utility model discloses a plurality of lightening holes have been seted up between magnet steel bank of cells and the electric motor rotor shaft hole in the region, the lightening hole circumference distributes, the interval is provided with the rivet hole before the lightening hole.
The utility model also provides a double speed PMSM, including any one preceding PMSM rotor. The motor is externally connected with a magnetic ring, so that high-speed weak magnetic current is reduced. The high-speed rated voltage of the motor is designed to be 300v, the input voltage 380 of the frequency converter reduces the bus voltage of the high-speed down converter, and the low-speed rated voltage is designed to be 380 v.
To sum up, the utility model discloses following beneficial effect has:
the utility model discloses a multilayer inverted triangle circular arc type magnet steel is arranged, has strengthened the magnetic energy of rotor, and the motor is big at low-speed operation moment output, high-speed constant power output torque, and the external magnetic ring reinforcing Q, D axle inductance of motor reduces fast-speed weak magnetic current for the motor can constant torque output under high speed state under constant power output, the low speed state.
Drawings
Fig. 1 is a schematic perspective view of the inside of the motor of the present invention;
FIG. 2 is a schematic cross-sectional view of a rotor according to the present invention;
FIG. 3 is a schematic view of the magnetic steel slot of the present invention;
fig. 4 is a schematic perspective view of the motor of the present invention;
in the figure, 1-rotor body, 2-magnetic steel groove group, 21-first magnetic steel groove, 22-second magnetic steel groove, 23-third magnetic steel groove, 231-first long side, 232-second long side, 3-motor stator, 4-auxiliary hole, 5-auxiliary groove, 6-expansion groove, 7-weight-reducing hole and 8-rivet hole.
Detailed Description
The present invention will be further explained by the following embodiments with reference to the attached drawings.
As shown in fig. 1-3, a double-speed permanent magnet synchronous motor rotor comprises a rotor body 1 and a plurality of magnetic steel slot groups 2 arranged in the rotor body 1, and is characterized in that: the magnetic steel slot group 2 is distributed along the circumference of the rotating shaft of the rotor body 1, the magnetic steel slot group 2 comprises one or more first magnetic steel slots 21, second magnetic steel slots 22 and third magnetic steel slots 23, the first magnetic steel slots 21 and the second magnetic steel slots 22 are arranged in a V shape, the openings of the first magnetic steel slots 21 and the second magnetic steel slots 22 face one side of the motor stator 3, the third magnetic steel slots 23 are arranged at the opening sides of the first magnetic steel slots 21 and the second magnetic steel slots 22, namely the first magnetic steel slots 21, the second magnetic steel slots 22 and the third magnetic steel slots 23 form a triangular magnetic steel slot group 21, one or more first magnetic steel slots 21, second magnetic steel slots 22 and third magnetic steel slots 23 form a multi-layer triangular magnetic steel array, magnetic steel is arranged in the first magnetic steel slots 21, the second magnetic steel slots 22 and the third magnetic steel slots 23, magnetic energy accumulation of the rotor is enhanced, and the torque of the motor is large in low-speed operation, the torque can be output at high speed and constant power.
In the embodiment of the present invention, the included angle between the first magnetic steel groove 21 and the second magnetic steel groove 22 is 60 degrees or more and 160 degrees or less. And a reinforcing rib is arranged between the first magnetic steel groove 21 and the second magnetic steel groove 22, and the width of the reinforcing rib is 1-5 mm. The region between first magnetic steel groove 21, second magnetic steel groove 22 and the third magnetic steel groove 23 is provided with one or more auxiliary hole 4, auxiliary hole 4 has the effect of magnetism isolation, can reduce rotor core loss and magnet steel eddy current loss, reduces the influence of higher harmonic to motor vibration, noise, ensures the high-efficient reliable when the motor high-speed operation. The auxiliary groove 5 that a plurality of circumferences distribute has been seted up on the periphery in 1 shaft hole of rotor body, auxiliary groove 5 is the arc wall, auxiliary groove 5 can make the cooperation between rotor and the pivot more stable, improves motor back electromotive force harmonic for more reliable and high-efficient when the motor moves.
In the embodiment of the present invention, the third magnetic steel slot 23 is an arc slot, and includes a first long side 231, a second long side 232 and two short sides, the first long side 231 is close to the motor stator 3 side, the second long side 232 is close to the first magnetic steel slot 21, the second magnetic steel slot 22 side, at least one expansion slot 6 is disposed on the second long side 232, the expansion slot 6 is an arc slot, the third magnetic steel slot 23 is curved in an arc shape towards the rotor rotation axis, because the motor rotor can generate heat between the rotor and the stator during the high speed rotation, the magnetic steel slot can also generate heat, the heat makes the rotor generate certain thermal deformation, the position of the magnetic steel slot is most obvious and serious, the existence of the expansion slot 6 can effectively prevent the magnetic steel slot from being deformed seriously or thermally damaged, because the third magnetic steel slot 23 is an arc type, the expansion groove 6 that is on the long limit 232 of second meets thermal expansion and can further spacing effect to the magnet steel, avoids the magnet steel to take place the skew to reduce the noise of vibration, also reduced the probability of motor demagnetization, increased the security performance.
The embodiment of the utility model provides an in first magnet steel groove 21 with second magnet steel groove 22 is the arc wall and towards 23 direction bending of third magnet steel groove, first magnet steel groove 21 with be provided with expansion tank 6 on the second magnet steel groove 22, expansion tank 6 is the arc wall, the existence of expansion tank 6 can effectually prevent that the magnet steel groove from warping seriously or taking place thermal damage, avoids the magnet steel to take place the skew to reduce the noise of vibration, also reduced the probability that the motor demagnetized, increased the security performance. A plurality of lightening holes 7 are formed in the area between the magnetic steel groove group 2 and the shaft hole of the motor rotor, the lightening holes 7 are distributed circumferentially, and rivet holes 8 are arranged in front of the lightening holes 7 at intervals.
As shown in fig. 4, the present invention further provides a dual-speed permanent magnet synchronous motor, which comprises any of the foregoing permanent magnet synchronous motor rotors. The motor is externally connected with a magnetic ring, so that high-speed weak magnetic current is reduced.
The above-described embodiments are merely illustrative of the preferred embodiments of the present invention and are not intended to limit the spirit and scope of the present invention. Without departing from the design concept of the present invention, various modifications and improvements made by the technical solution of the present invention by those skilled in the art should fall into the protection scope of the present invention, and the technical contents claimed by the present invention have been fully recorded in the claims.
Claims (10)
1. The utility model provides a double speed PMSM rotor, includes rotor body (1) and sets up a plurality of magnet steel slot group (2) in body (1), its characterized in that: the magnetic steel slot group (2) is distributed along the circumference of a rotating shaft of the rotor body (1), the magnetic steel slot group (2) comprises one or more first magnetic steel slots (21), second magnetic steel slots (22) and third magnetic steel slots (23), the first magnetic steel slots (21) and the second magnetic steel slots (22) are arranged in a V shape, openings of the first magnetic steel slots and the second magnetic steel slots face one side of the motor stator (3), and the third magnetic steel slots (23) are arranged on the opening sides of the first magnetic steel slots (21) and the second magnetic steel slots (22).
2. A two-speed permanent magnet synchronous motor rotor as claimed in claim 1, wherein: the included angle between the first magnetic steel groove (21) and the second magnetic steel groove (22) is more than or equal to 60 degrees and less than or equal to 160 degrees.
3. A two-speed permanent magnet synchronous motor rotor as claimed in claim 1, wherein: and a reinforcing rib is arranged between the first magnetic steel groove (21) and the second magnetic steel groove (22), and the width of the reinforcing rib is 1-5 mm.
4. A two-speed permanent magnet synchronous motor rotor as claimed in claim 1, wherein: one or more auxiliary holes (4) are arranged in the area among the first magnetic steel groove (21), the second magnetic steel groove (22) and the third magnetic steel groove (23).
5. A two-speed permanent magnet synchronous motor rotor as claimed in claim 1, wherein: the rotor is characterized in that a plurality of auxiliary grooves (5) distributed circumferentially are formed in the circumferential surface of the shaft hole of the rotor body (1), and the auxiliary grooves (5) are arc-shaped grooves.
6. A two-speed permanent magnet synchronous motor rotor as claimed in claim 1, wherein: third magnetism steel slot (23) are the arc wire casing, including first long limit (231) and the long limit of second (232) and two minor faces, first long limit (231) are close to motor stator (3) one side, the long limit of second (232) are close to first magnetism steel slot (21), second magnetism steel slot (22) one side, be provided with one expansion tank (6) on the long limit of second (232) at least, expansion tank (6) are the arc wall.
7. A two-speed permanent magnet synchronous motor rotor as claimed in claim 1, wherein: first magnetism steel groove (21) with second magnetism steel groove (22) are the arc wall and towards third magnetism steel groove (23) direction bending, first magnetism steel groove (21) with be provided with expansion tank (6) on second magnetism steel groove (22), expansion tank (6) are the arc wall.
8. A two-speed permanent magnet synchronous motor rotor as claimed in claim 1, wherein: a plurality of lightening holes (7) are formed in the area between the magnetic steel groove group (2) and the motor rotor shaft hole, the lightening holes (7) are distributed circumferentially, and rivet holes (8) are arranged in front of the lightening holes (7) at intervals.
9. A double-speed permanent magnet synchronous motor is characterized in that: comprising a permanent magnet synchronous motor rotor according to any of claims 1-8.
10. A two-speed permanent magnet synchronous machine as claimed in claim 9 wherein: the motor is externally connected with a magnetic ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020914410.8U CN212063660U (en) | 2020-05-27 | 2020-05-27 | Double-speed permanent magnet synchronous motor rotor and motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020914410.8U CN212063660U (en) | 2020-05-27 | 2020-05-27 | Double-speed permanent magnet synchronous motor rotor and motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212063660U true CN212063660U (en) | 2020-12-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020914410.8U Active CN212063660U (en) | 2020-05-27 | 2020-05-27 | Double-speed permanent magnet synchronous motor rotor and motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212063660U (en) |
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2020
- 2020-05-27 CN CN202020914410.8U patent/CN212063660U/en active Active
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