CN216414006U - Low-vibration variable-frequency permanent magnet motor punching sheet for air cooling island - Google Patents
Low-vibration variable-frequency permanent magnet motor punching sheet for air cooling island Download PDFInfo
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- CN216414006U CN216414006U CN202123269242.5U CN202123269242U CN216414006U CN 216414006 U CN216414006 U CN 216414006U CN 202123269242 U CN202123269242 U CN 202123269242U CN 216414006 U CN216414006 U CN 216414006U
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Abstract
The utility model relates to the technical field of permanent magnet motors, and particularly discloses a low-vibration variable-frequency permanent magnet motor punching sheet for an air cooling island, which comprises a stator punching sheet and a rotor punching sheet, wherein the outer circle of the stator punching sheet is fixedly connected with the inner circle of a motor shell, the rotor punching sheet is connected with a motor rotating shaft in an interference fit manner, an air gap is arranged between the inner circle of the stator punching sheet and the outer circle of the rotor punching sheet, a plurality of stator teeth are uniformly arranged in the inner circle of the stator punching sheet, a tooth socket is arranged between every two adjacent stator teeth, notch convex blocks are arranged at two ends of the top of each stator tooth, two adjacent notch convex blocks on every two adjacent stator teeth form a notch, two virtual grooves are also arranged at the top ends of each stator tooth, a plurality of salient arc-shaped magnetic poles are uniformly arranged on the outer circle of the rotor punching sheet, and interelectrode partition grooves are also arranged between every two adjacent magnetic poles, so that the problem that the torque pulsation of the traditional variable-frequency permanent magnet direct drive motor special for the air cooling island causes the larger vibration of the motor is solved, the bridge frame of the air cooling island after transformation is unstable, and potential safety hazards exist.
Description
Technical Field
The application relates to the technical field of permanent magnet motors, and particularly discloses a low-vibration variable-frequency permanent magnet motor punching sheet for an air cooling island.
Background
A variable-frequency permanent magnet direct-drive motor special for an air cooling island is special driving equipment for energy-saving transformation and upgrading of the air cooling island, and the equipment has the advantages of high efficiency, energy conservation, simple transmission, no maintenance and the like. The motor is a magnetic circuit formed by a stator, a rotor and an air gap between the stator and the rotor, a rotating shaft of the motor is driven to rotate by electromagnetic force, in the process, the instantaneous output torque of the motor can change constantly but fluctuates up and down around a certain average value all the time, and the phenomenon is called torque pulsation.
Most of existing variable-frequency permanent magnet direct-drive motors special for air cooling islands have torque pulsation, the torque pulsation can enable the motors to drag loads to generate vibration, the stability of a bridge frame of the air cooling island after modification is affected, and potential safety hazards exist. In view of the above, the present invention provides a low-vibration frequency-conversion permanent magnet motor punching sheet for an air cooling island, so as to solve the above problems.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the problems that a traditional variable-frequency permanent magnet direct-drive motor special for the air cooling island has torque pulsation to cause the motor to generate larger vibration, so that a bridge frame of the modified air cooling island is unstable and has potential safety hazards.
In order to achieve the purpose, the basic scheme of the utility model provides a low-vibration variable-frequency permanent magnet motor punching sheet for an air cooling island, which comprises a stator punching sheet and a rotor punching sheet matched with the stator punching sheet, wherein the outer circle of the stator punching sheet is fixedly connected with the inner circle of a motor shell, the rotor punching sheet is in interference fit connection with a motor rotating shaft, an air gap is arranged between the inner circle of the stator punching sheet and the outer circle of the rotor punching sheet, a plurality of stator teeth are uniformly arranged in the inner circle of the stator punching sheet, tooth grooves for placing stator windings are respectively arranged between every two adjacent stator teeth, notch convex blocks are respectively arranged at two ends of the tops of the stator teeth, two adjacent notch convex blocks on the two adjacent stator teeth form a notch, two virtual grooves are also respectively arranged at the tops of the stator teeth, a plurality of salient arc-shaped magnetic poles are uniformly arranged on the outer circle of the rotor punching sheet, and interelectrode partition grooves are also respectively arranged between every two adjacent magnetic poles.
The principle and effect of this basic scheme lie in:
1. according to the utility model, the virtual slots are arranged at the tops of the stator teeth, so that the degree of uneven magnetic field distribution caused by directly slotting on the stator punching sheet is reduced, the cogging torque is reduced, the electromagnetic vibration and the electromagnetic noise are reduced, and the cogging torque pulsation is reduced.
2. The utility model sets the magnetic poles on the excircle of the rotor punching sheet to be in a salient pole arc shape, so that the magnetic poles on the rotor punching sheet form a salient pole effect, thereby facilitating the optimization of the harmonic component of the motor, reducing the electromagnetic vibration and the electromagnetic noise and further reducing the torque pulsation.
3. According to the utility model, the interpolar partition grooves are arranged between the magnetic poles on the excircle of the rotor punching sheet, so that not only can the magnetic leakage of the permanent magnet be prevented, the consumption of raw materials be reduced, the manufacturing cost be reduced, but also the magnetic field of each magnetic pole can be more concentrated, and the harmonic content and harmonic loss of the motor can be reduced.
4. Compared with the prior art, the air cooling island bridge is provided with the virtual slots, so that the non-uniform degree of a magnetic field caused by direct slotting on the stator is reduced, the cogging torque is effectively reduced, the electromagnetic vibration and noise are reduced through the virtual slots and the salient arc-shaped magnetic poles, the torque pulsation is reduced, the manufacturing cost is saved by arranging the interelectrode partition slots between the magnetic poles, the harmonic content and the harmonic loss of the motor are reduced, and the problems that the motor generates large vibration due to the torque pulsation, the bridge of the modified air cooling island is unstable and the potential safety hazard exists in the traditional special variable-frequency permanent magnet direct drive motor for the air cooling island are solved.
Further, the top of the stator tooth is a circular arc-shaped surface. By adopting the arc design on the top of the stator teeth, the salient pole effect error caused by the eccentricity of an air gap due to the processing and manufacturing of the rotor and the existence of the bearing play can be reduced.
Furthermore, the height difference between the highest point and the lowest point of the circular arc is A, the length of the air gap is B, the height of the notch convex block is C, wherein A/C is more than or equal to 0 and less than or equal to 0.5B. The arc shape of the teeth is set in an adjustable range suitable for a special variable frequency motor for the air cooling island, so that the uneven distribution degree of an air gap magnetic field caused by air gap eccentricity is further reduced, and the running stability of the motor is ensured.
Further, the width of the virtual groove is D, the depth of the virtual groove is E, and the width of the notch is F, where D is 0.75F, and E is 0.75C. The width and the depth of the virtual groove are set to be 0.75 times of the notch, so that the magnetic field distribution in the frequency conversion motor special for the air cooling island is more uniform, the torque pulsation generated by the tooth socket is reduced, and the vibration is reduced.
Further, the height difference between the highest point and the lowest point of the salient pole arc-shaped magnetic pole is G, wherein G is 0.7B. The salient pole arc of the magnetic pole is designed to be 0.7 times of the air gap length, so that the salient pole effect of the variable frequency motor special for the air cooling island is formed, the harmonic component of the motor is optimized, and the electromagnetic vibration and the electromagnetic noise generated by the motor are reduced.
Furthermore, the excircle of the stator punching sheet is provided with a plurality of welding rib grooves which are convenient for laminating the stator punching sheet into a stator core. Through setting up welding rib groove, be convenient for with a plurality of stator towards piece lamination stator core.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 shows an assembly diagram of a low-vibration variable-frequency permanent magnet motor punching sheet for an air cooling island, which is provided by the embodiment of the application;
fig. 2 shows a schematic structural diagram of a stator lamination of a low-vibration variable-frequency permanent magnet motor lamination for an air cooling island, which is provided by the embodiment of the application;
fig. 3 shows a schematic structural diagram of a rotor punching of a low-vibration variable-frequency permanent magnet motor punching for an air cooling island, which is provided by the embodiment of the application.
Detailed Description
To further illustrate the technical means and effects of the present invention for achieving the intended purpose of the utility model, the following detailed description of the embodiments, structures, features and effects according to the present invention will be made with reference to the accompanying drawings and preferred embodiments.
Reference numerals in the drawings of the specification include: the stator punching sheet comprises a stator punching sheet 1, a rotor punching sheet 2, a welding rib groove 3, an air gap 4, stator teeth 5, a tooth groove 6, a notch convex block 7, a notch 8, a virtual groove 9, a magnetic pole 10 and an interelectrode dividing groove 11.
An embodiment of a low-vibration variable-frequency permanent magnet motor punching sheet for an air cooling island is shown in fig. 1: including stator towards piece 1 and with stator towards piece 1 assorted rotor punching piece 2, circle rigid coupling in stator towards piece 1 excircle and the motor casing, stator towards piece 1 excircle is equipped with a plurality of welding rib grooves 3 that are used for being connected with motor housing, rotor towards piece 2 is connected with motor shaft interference fit, be equipped with air gap 4 between stator towards piece 1 interior circle and rotor towards piece 2 excircle, the stator towards piece 1 interior circle and rotor towards piece 2 between the excircle length of air gap 4 be B. As shown in fig. 2, 48 stator teeth 5 for placing stator windings are uniformly arranged in a stator lamination 1, the top of each stator tooth 5 is a circular arc-shaped surface, the height difference between the highest point and the lowest point of the circular arc is a, a tooth space 6 is arranged between every two adjacent stator teeth 5, notch convex blocks 7 are arranged at two ends of the top of each stator tooth 5, the height of each notch convex block 7 is C, wherein a/C is greater than or equal to 0 and less than or equal to 0.5B, two adjacent notch convex blocks 7 on every two adjacent stator teeth 5 form a notch 8, the width of each notch 8 is F, two virtual grooves 9 are further arranged at the top end of each stator tooth 5, the width of each virtual groove 9 is D, the depth of each virtual groove 9 is E, wherein D is 0.75F, and E is 0.75C. As shown in fig. 3, 40 salient arc-shaped magnetic poles 10 are uniformly arranged on the outer circle of the rotor sheet 2, the number of the salient arc-shaped magnetic poles 10 is equal to the number of poles of the motor, the magnetic poles 10 are composed of permanent magnets, the height difference between the highest point and the lowest point of the salient arc-shaped magnetic poles 10 is G, wherein G is 0.7B, and inter-pole dividing grooves 11 are also arranged between every two adjacent magnetic poles 10.
In the specific implementation process of the utility model, the stator punching sheet 1 and the rotor punching sheet 2 are respectively laminated into a stator core and a rotor core according to the designed length, and then the stator core and the rotor core are respectively arranged in the motor shell and on the motor rotating shaft. Due to the setting of the characteristics of the stator punching sheet 1 and the rotor punching sheet 2, the output of the special variable frequency motor for the air cooling island after being transformed is stable in operation, the torque pulsation is greatly reduced, and the electromagnetic vibration and the electromagnetic noise are reduced.
Compared with the prior art, the utility model adopts the arc design on the top of the stator teeth 5, can reduce the uneven degree of an air gap magnetic field caused by the eccentricity of an air gap 4 caused by the processing and manufacturing of a rotor and the existence of bearing play, effectively reduces the torque of a tooth space 6 by arranging the virtual slot 9, saves the manufacturing cost by arranging the inter-pole dividing slot 11 between the magnetic poles 10, reduces the harmonic content and the harmonic loss of the motor, forms the characteristics conforming to the frequency conversion motor special for the air cooling island by respectively setting the relevant characteristic parameters of the virtual slot 9, the salient pole arc-shaped magnetic pole 10 and the arc-shaped top surface of the stator teeth 5, reduces the electromagnetic vibration and the noise, reduces the torque pulsation, solves the problem that the traditional frequency conversion permanent magnetic direct drive motor special for the air cooling island has the torque pulsation to cause the larger vibration of the motor and the instability of the bridge frame after transformation, the potential safety hazard exists.
Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the utility model as defined by the appended claims.
Claims (6)
1. The utility model provides an air cooling island is with low vibration frequency conversion permanent-magnet machine towards piece which characterized in that: including stator punching and with stator punching assorted rotor punching, circle rigid coupling in stator punching excircle and motor casing, the rotor punching is connected with motor shaft interference fit, be equipped with the air gap between circle and the rotor punching excircle in the stator punching, the circle evenly is equipped with a plurality of stator teeth in the stator punching, all be equipped with the tooth's socket that is used for placing stator winding between two adjacent stator teeth, the top both ends of stator tooth all are equipped with the notch lug, two adjacent notch lugs on two adjacent stator teeth constitute a notch, the top of stator tooth still all is equipped with two virtual grooves, the rotor punching excircle evenly is equipped with the magnetic pole of a plurality of arcuations of salient poles, still all be equipped with interelectrode cut-off the groove between two adjacent magnetic poles.
2. The low-vibration variable-frequency permanent magnet motor punching sheet for the air cooling island according to claim 1, wherein the tops of the stator teeth are arc-shaped surfaces.
3. The punching sheet of the low-vibration variable-frequency permanent magnet motor for the air cooling island according to claim 2, wherein the height difference between the highest point and the lowest point of the circular arc is A, the length of the air gap is B, and the height of the notch bump is C, wherein A/C is more than or equal to 0 and less than or equal to 0.5B.
4. The punching sheet of the low-vibration variable-frequency permanent magnet motor for the air cooling island according to claim 3, wherein the width of the virtual groove is D, the depth of the virtual groove is E, and the width of the notch is F, wherein D is 0.75F, and E is 0.75C.
5. The punching sheet of the low-vibration variable-frequency permanent magnet motor for the air cooling island according to claim 4, wherein the height difference between the highest point and the lowest point of the salient pole arc-shaped magnetic pole is G, wherein G is 0.7B.
6. The punching sheet of the low-vibration variable-frequency permanent magnet motor for the air cooling island according to claim 1, wherein a plurality of welding rib grooves facilitating lamination of the stator punching sheet into a stator core are formed in the outer circle of the stator punching sheet.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123269242.5U CN216414006U (en) | 2021-12-23 | 2021-12-23 | Low-vibration variable-frequency permanent magnet motor punching sheet for air cooling island |
| JP2022003529U JP3240303U (en) | 2021-12-23 | 2022-10-25 | Low Vibration Variable Frequency Permanent Magnet Motor Stamping Sheet for Air Cooling System |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123269242.5U CN216414006U (en) | 2021-12-23 | 2021-12-23 | Low-vibration variable-frequency permanent magnet motor punching sheet for air cooling island |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216414006U true CN216414006U (en) | 2022-04-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202123269242.5U Active CN216414006U (en) | 2021-12-23 | 2021-12-23 | Low-vibration variable-frequency permanent magnet motor punching sheet for air cooling island |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3240303U (en) |
| CN (1) | CN216414006U (en) |
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2021
- 2021-12-23 CN CN202123269242.5U patent/CN216414006U/en active Active
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2022
- 2022-10-25 JP JP2022003529U patent/JP3240303U/en active Active
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| Publication number | Publication date |
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| JP3240303U (en) | 2022-12-22 |
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