CN213461292U - Low-noise permanent magnet synchronous variable frequency motor rotor punching sheet - Google Patents
Low-noise permanent magnet synchronous variable frequency motor rotor punching sheet Download PDFInfo
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- CN213461292U CN213461292U CN202022588662.9U CN202022588662U CN213461292U CN 213461292 U CN213461292 U CN 213461292U CN 202022588662 U CN202022588662 U CN 202022588662U CN 213461292 U CN213461292 U CN 213461292U
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Abstract
The utility model discloses a low-noise permanent magnet synchronous variable frequency motor rotor punching sheet, which belongs to the technical field of motor manufacturing and comprises a rotor punching sheet, wherein twelve air gap grooves are dug at the front end of the rotor punching sheet, forty magnetic steel holes are dug at the front end of the rotor punching sheet, two third side holes are dug on the inner wall of each magnetic steel hole, and a distance of 46cm is arranged between the two third side holes, each third side hole is triangular, each third side hole is arranged on an inner wall of the magnetic steel hole close to the air gap groove, the inner wall of each magnetic steel hole is provided with two second side holes, and be provided with 46 cm's distance between two second side holes, every second side hole all sets up an inner wall of keeping away from the air gap groove in the magnet steel hole, all is provided with 5 cm's distance between two magnet steel holes, and the diameter setting of rotor punching is between 760cm ~760.1cm, the utility model discloses can realize effectively reducing permanent-magnet machine's electromagnetic noise.
Description
Technical Field
The utility model relates to a motor manufacturing technology field, more specifically say, relate to synchronous inverter motor rotor punching of low noise permanent magnetism.
Background
The motor is a device for converting electric energy into mechanical energy, and mainly comprises an electromagnet winding or a distributed stator winding for generating a magnetic field and a rotating armature or a rotor, wherein a rotating magnetic field is generated by utilizing an electrified coil and acts on the rotor to form magnetoelectric power rotating torque, the rotating armature or the rotor is divided into a direct current motor and an alternating current motor according to different power sources, and most of the motors in the power system are alternating current motors and can be synchronous motors or asynchronous motors.
The permanent magnet synchronous motor generates large noise in actual operation. Through analysis, the electromagnetic noise is mainly caused by the frequency of the radial force wave inside the motor, and the frequency of the radial force wave is related to the eccentricity of the rotor, the length of an air gap and harmonic waves generated by a power supply mode of the self frequency conversion of the motor. One of the main reasons for the high electromagnetic noise is that the air gap field of the motor is not sinusoidal or not sufficiently sinusoidal.
SUMMERY OF THE UTILITY MODEL
1. Technical problem to be solved
To the problem that exists among the prior art, the utility model aims to provide a low noise permanent magnetism synchronous variable frequency motor rotor is towards piece, and it can realize effectively reducing permanent magnet machine's electromagnetic noise.
2. Technical scheme
In order to solve the above problem, the utility model adopts the following technical scheme:
low noise permanent magnetism synchronous inverter motor rotor punching, including rotor punching, rotor punching's front end is dug there are twelve air gap grooves, rotor punching's front end is dug has forty magnet steel holes, every the inner wall in magnet steel hole has all been dug two third side holes, and is provided with 46 cm's distance between two third side holes, every the third side hole all sets up to triangle-shaped, every the third side hole all sets up an inner wall that is close to the air gap groove at the magnet steel hole, every the inner wall in magnet steel hole has all been dug two second side holes, and is provided with 46 cm's distance between two second side holes, every the second side hole all sets up an inner wall of keeping away from the air gap groove at the magnet steel hole, two all be provided with 5 cm's distance between the magnet steel hole, rotor punching's diameter sets up between 760cm 760.1 cm.
As the utility model discloses an optimal scheme, the front end excavation of rotor punching has the shaft hole, the excavation has two spacing holes on the circumference inner wall in shaft hole, and two spacing hole evenly distributed are on the circumference inner wall in shaft hole.
As the utility model discloses an optimal scheme, the front end excavation of rotor punching has a plurality of evenly distributed's louvre, every all excavate the first side hole that has two evenly distributed on the inner wall of louvre, every the louvre all sets up to the U shape, every first side hole all sets up to trapezoidal form.
As an optimized scheme of the utility model, the rotor is provided with thin and even insulating layer on the surface towards the piece.
As an optimized scheme of the utility model, the front end of rotor punching is dug has a plurality of evenly distributed's mounting hole.
As a preferred scheme of the utility model, per two all be provided with a mounting hole between the louvre.
3. Advantageous effects
Compared with the prior art, the utility model has the advantages of:
(1) the rotor punching sheet is provided with the plurality of air gap grooves, the air gap grooves change the magnetic field direction of the magnetic steel and balance the magnetic field distribution in the motor, the structural design between the adjacent magnetic steel holes and the air gap grooves enables the rotation torque pulsation of the whole rotor to be reduced, the torque pulsation generated when the rotor rotates is reduced, further, the air gap magnetic field of the motor is more sinusoidal due to the directional modulation effect of the magnetic steel holes and the air gap grooves on the magnetic field when the motor works, the harmonic content is reduced, and therefore the noise vibration generated in the operation process of the motor is greatly improved.
(2) The circumference inner wall through the shaft hole is provided with spacing hole, can realize the spacing of rotor punching, is provided with a plurality of louvres through the rotor punching, can increase the heat dissipation of rotor punching.
Drawings
Fig. 1 is a schematic structural diagram of a rotor sheet of a low-noise permanent magnet synchronous variable frequency motor of the present invention;
FIG. 2 is a front view of a rotor sheet of the low-noise permanent magnet synchronous variable frequency motor of the present invention;
fig. 3 is the utility model discloses a low noise permanent magnet synchronous variable frequency motor rotor is towards enlarged structure schematic diagram of A department in fig. 2.
The reference numbers in the figures illustrate:
1. rotor punching sheets; 2. an air gap groove; 3. a magnetic steel hole; 4. a limiting hole; 5. a shaft hole; 6. a first side hole; 7. heat dissipation holes; 8. a second side hole; 9. mounting holes; 10. and a third side hole.
Detailed Description
The technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all embodiments, and all other embodiments obtained by those skilled in the art without any inventive work are within the scope of the present invention based on the embodiments of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "top/bottom", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "provided", "sleeved/connected", "connected", and the like are to be understood in a broad sense, such as "connected", which may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Example (b):
referring to fig. 1-3, the low-noise permanent magnet synchronous variable frequency motor rotor punching comprises a rotor punching 1, twelve air gap grooves 2 are cut at the front end of the rotor punching 1, forty magnetic steel holes 3 are cut at the front end of the rotor punching 1, two third side holes 10 are cut on the inner wall of each magnetic steel hole 3, and a distance of 46cm is arranged between the two third side holes 10, each third side hole 10 is triangular, each third side hole 10 is arranged on an inner wall of the magnetic steel hole 3 close to the air gap groove 2, two second side holes 8 are chiseled on the inner wall of each magnetic steel hole 3, and a distance of 46cm is arranged between the two second side holes 8, each second side hole 8 is arranged on an inner wall, far away from the air gap groove 2, of the magnetic steel hole 3, a distance of 5cm is arranged between the two magnetic steel holes 3, and the diameter of the rotor punching sheet 1 is set between 760cm and 760.1 cm.
In this embodiment, through the setting of air gap groove 2, can change the magnetic field direction that the magnet steel produced, the inside magnetic field line distribution of balanced motor, magnet steel hole 3 is used for bearing the magnet steel, forms permanent magnet rotor from this to the torque ripple that produces when this reduces the rotor and rotates, thereby reduces electromagnetic noise.
Specifically, referring to fig. 2, a shaft hole 5 is drilled at the front end of the rotor sheet 1, two limiting holes 4 are drilled on the circumferential inner wall of the shaft hole 5, and the two limiting holes 4 are uniformly distributed on the circumferential inner wall of the shaft hole 5.
In this embodiment, the rotor sheet 1 is provided with a shaft hole 5, and the shaft hole 5 is used for connecting a rotor shaft.
Specifically, referring to fig. 2, a plurality of heat dissipation holes 7 are cut at the front end of the rotor sheet 1, two first side holes 6 are cut on the inner wall of each heat dissipation hole 7, the first side holes 6 are uniformly distributed, each heat dissipation hole 7 is U-shaped, and each first side hole 6 is trapezoidal.
In this embodiment, the heat dissipation holes 7 are formed in the rotor sheet 1, so that the heat dissipation of the rotor sheet 1 can be increased.
Specifically, referring to fig. 1, a thin and uniform insulating layer is disposed on a surface of a rotor sheet 1.
In this embodiment, the thin and uniform insulating layer is arranged on the surface of the rotor sheet 1, so that the dielectric strength and the moisture-proof effect are improved.
Specifically, referring to fig. 2, a plurality of mounting holes 9 are drilled in the front end of the rotor sheet 1.
In this embodiment, a plurality of mounting holes 9 are cut at the front end of the rotor sheet 1 and are uniformly distributed, so that the rotor sheet 1 can be mounted.
Specifically, referring to fig. 2, a mounting hole 9 is disposed between every two heat dissipation holes 7.
In this embodiment, a mounting hole 9 is formed between every two heat dissipation holes 7.
The working principle is as follows: the rotor punching sheet 1 is provided with the air gap grooves 2, the air gap grooves 2 change the magnetic field direction of magnetic steel, magnetic field lines in the motor are balanced in distribution, the structural design between the adjacent magnetic steel holes 3 and the air gap grooves 2 enables the rotation torque pulsation of the whole rotor to be reduced, and the torque pulsation generated when the rotor rotates is reduced.
The above description is only the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can substitute or change the technical solution and the improvement concept of the present invention within the technical scope disclosed in the present invention.
Claims (6)
1. Low noise permanent magnetism synchronous variable frequency motor rotor punching, including rotor punching (1), its characterized in that: the front end of the rotor punching sheet (1) is provided with twelve air gap grooves (2), the front end of the rotor punching sheet (1) is provided with forty magnetic steel holes (3), the inner wall of each magnetic steel hole (3) is provided with two third side holes (10), and a distance of 46cm is arranged between the two third side holes (10), each third side hole (10) is triangular, each third side hole (10) is arranged on an inner wall of the magnet steel hole (3) close to the air gap groove (2), two second side holes (8) are drilled on the inner wall of each magnet steel hole (3), and a distance of 46cm is arranged between the two second side holes (8), each second side hole (8) is arranged on an inner wall of the magnetic steel hole (3) far away from the air gap groove (2), a distance of 5cm is arranged between the two magnetic steel holes (3), the diameter of the rotor punching sheet (1) is set between 760cm and 760.1 cm.
2. The rotor punching sheet of the low-noise permanent magnet synchronous variable frequency motor according to claim 1, characterized in that: the front end of rotor punching (1) is dug and is had shaft hole (5), it has two spacing holes (4) to dig on the circumference inner wall in shaft hole (5), and two spacing holes (4) evenly distributed are on the circumference inner wall in shaft hole (5).
3. The rotor punching sheet of the low-noise permanent magnet synchronous variable frequency motor as claimed in claim 2, wherein: the front end of rotor punching (1) is dug and is had a plurality of evenly distributed's louvre (7), every all dig first side hole (6) that have two evenly distributed on the inner wall of louvre (7), every louvre (7) all set up to the U-shaped, every first side hole (6) all set up to the trapezoidal form.
4. The rotor punching sheet of the low-noise permanent magnet synchronous variable frequency motor according to claim 3, characterized in that: the rotor punching sheet (1) is characterized in that a thin and uniform insulating layer is arranged on the surface of the rotor punching sheet.
5. The rotor punching sheet of the low-noise permanent magnet synchronous variable frequency motor as claimed in claim 4, wherein: the front end of the rotor punching sheet (1) is provided with a plurality of uniformly distributed mounting holes (9).
6. The rotor punching sheet of the low-noise permanent magnet synchronous variable frequency motor according to claim 5, characterized in that: and a mounting hole (9) is formed between every two heat dissipation holes (7).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022588662.9U CN213461292U (en) | 2020-11-11 | 2020-11-11 | Low-noise permanent magnet synchronous variable frequency motor rotor punching sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022588662.9U CN213461292U (en) | 2020-11-11 | 2020-11-11 | Low-noise permanent magnet synchronous variable frequency motor rotor punching sheet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213461292U true CN213461292U (en) | 2021-06-15 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022588662.9U Active CN213461292U (en) | 2020-11-11 | 2020-11-11 | Low-noise permanent magnet synchronous variable frequency motor rotor punching sheet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213461292U (en) |
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2020
- 2020-11-11 CN CN202022588662.9U patent/CN213461292U/en active Active
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