CN215221849U - High-power variable frequency motor and special rotor punching sheet thereof - Google Patents
High-power variable frequency motor and special rotor punching sheet thereof Download PDFInfo
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- CN215221849U CN215221849U CN202121698804.5U CN202121698804U CN215221849U CN 215221849 U CN215221849 U CN 215221849U CN 202121698804 U CN202121698804 U CN 202121698804U CN 215221849 U CN215221849 U CN 215221849U
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Abstract
The utility model discloses a high-power variable frequency motor and a special rotor punching sheet thereof, wherein the rotor punching sheet comprises a rotor punching sheet body; the middle part of the rotor punching sheet body is provided with a shaft hole for installing a rotating shaft, and the edge is uniformly provided with a group of rotor punching sheet grooves along the circumferential direction; the inner wall of the shaft hole is symmetrically provided with an inclined key groove and a flat key groove; the rotor punching sheet groove is a round dome bottom groove with a large top end and a small bottom end, and the top end is provided with a notch; and a group of ventilation holes are formed in the annular surface between the rotor punching sheet groove and the shaft hole along the circumferential direction. The special rotor punching sheet for the high-power variable frequency motor has the advantages that the motor has higher starting torque through designing the rotor punching sheet groove with a specific structure, the motor can be started when the low frequency is ensured, the influence of higher harmonic waves of a frequency converter on the vibration of the motor can be weakened, and the noise of the motor can be reduced; in addition, the rotor punching sheet is provided with the ventilation holes, so that the ventilation and heat dissipation of the motor in high and low frequencies can be accelerated, the temperature rise of the motor is effectively reduced, and the service life of the motor is prolonged.
Description
Technical Field
The utility model relates to a inverter motor technical field, concretely relates to high-power inverter motor and dedicated rotor punching thereof.
Background
An electric machine is an energy conversion device that converts electrical energy into mechanical energy, and includes a rotor and a stator. The rotor is a rotating part in the motor and is formed by stacking silicon steel sheets (rotor punching sheets); the stator is a power output mechanism in the motor, belongs to a fixed part, and is formed by stacking silicon steel sheets (stator punching sheets) and is embedded with a coil winding, and after the motor is electrified, the winding generates a rotating magnetic field to push the rotor to rotate so as to realize kinetic energy output.
The stator/rotor punching sheet is a key part of the motor, mainly plays a role in winding, magnetic conduction and heat dissipation, and has direct influence on the energy consumption, the working efficiency, the noise and the service life of the motor due to the material, the size, the shape and the like. In order to improve starting torque, a dome round bottom groove is generally adopted in a rotor punching sheet of a common motor in the market at present, but the groove has large starting torque and large starting current, so that the motor is only suitable for a low-power motor. For a high-power motor (more than 11 KW), the starting current can cause serious impact on a motor winding, even burn the motor, and possibly cause impact on a power grid, so that a punching sheet groove of a rotor punching sheet of the high-power motor is generally designed into a convex groove or a knife-edge groove; however, the slot design has poor effect of eliminating the harmonic magnetic field of the motor, the purpose of improving the efficiency of the motor cannot be achieved, the motor has the defects of large noise, large power consumption, small torque and the like when the motor is in load operation, and the temperature rise of the motor can be increased when the power consumption is too large, so that the service life of the motor is influenced, the economic loss is caused, and the maintenance cost is increased.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a high-power inverter motor for overcome the foretell defect that exists among the prior art. The rotor punching sheet of the high-power variable frequency motor adopts the rotor punching sheet groove with a specific structure, so that the variable frequency motor has higher starting torque, can be started when the motor is ensured to be low-frequency, can weaken the influence of higher harmonic waves of a frequency converter on the vibration of the motor, and can reduce the noise of the motor; in addition, the rotor punching sheet is provided with the ventilation holes, so that ventilation and heat dissipation of the motor at high and low frequencies are facilitated, the temperature rise of the motor is reduced, and the service life of the motor is prolonged. Correspondingly, the utility model also provides a dedicated rotor punching of high-power inverter motor.
To high-power inverter motor, the technical scheme of the utility model is that: a high-power variable frequency motor comprises a motor rotor; the motor rotor is formed by stacking rotor punching sheets; the rotor punching sheet comprises a rotor punching sheet body, the middle of the rotor punching sheet body is provided with a shaft hole for mounting a rotating shaft, and a group of rotor punching sheet grooves are uniformly formed in the edge of the rotor punching sheet body along the circumferential direction; two key grooves are symmetrically arranged on the inner wall of the shaft hole, one key groove is an inclined key groove, the bottom of the inclined key groove is an inclined plane, the other key groove is a flat key groove, and the bottom of the flat key groove is a plane; the rotor punching sheet groove is a round dome bottom groove with a large top end and a small bottom end, and the top end of the rotor punching sheet groove is provided with a notch; and a group of ventilation holes are formed in the annular surface between the rotor punching sheet groove and the shaft hole along the circumferential direction.
Compared with the prior art, the rotor punching sheet adopted by the high-power variable frequency motor has the advantages that the rotor punching sheet groove is a round dome bottom groove with a large top end and a small bottom end (starting current can be just reduced due to the fact that the variable frequency motor is started at low frequency), the leakage magnetic loss of the rotor is low, the variable frequency motor has high starting torque, starting of the motor at low frequency is guaranteed, the influence of higher harmonics of a frequency converter on motor vibration is weakened, motor noise is reduced, power consumption of the motor during load operation is reduced, and the working efficiency of the motor is effectively improved; the design has the ventilation hole on the rotor punching, has improved ventilation effect for the partial heat that the rotor consumed can be taken away through the ventilation hole, is favorable to the ventilation cooling of motor when high, low frequency, reduces the temperature rise of motor, thereby has avoided leading to being heated the condition that the inequality appears burning because of the inside ventilation of rotor when motor high load operation, has increased the life of motor.
Preferably, the top radius R1 of the rotor punching groove is 4.7mm, the bottom radius R2 is 2.5mm, the width W1 of the notch is 1.5mm, the height H1 of the notch is 1mm, the depth H2 of the groove is 49.05mm, and the length G of the air gap is 0.9 mm. At the moment, the starting torque of the motor can reach 2.4-2.8 times of the rated torque of the motor, and the motor noise can be reduced by 6-7dB (A).
And as optimization, 58 rotor punching grooves are uniformly formed in the rotor punching body. At the moment, the torque pulsation of the motor is small, the motor runs stably, the anti-interference capacity of the motor is high, and the noise is low.
Preferably, each vent hole is a round hole, and the diameter D1 of each vent hole is 36 mm. The ventilation holes are round holes, so that the structure is simple and the manufacture is convenient.
Further, 12 ventilation holes are uniformly formed in the rotor punching sheet body; two adjacent ventilation holes are symmetrically arranged along the radial direction, and the circle center of each ventilation hole is distributed on the circumference with the diameter D2 of 180 mm. The adjacent radial symmetry in ventilation hole sets up, is favorable to the atress balance for the circulation that the inside heat of motor can be better strengthens inside thermal cycle, distributes away the heat as fast as possible, thereby improves the reliability that the rotor punching used, guarantees the running performance of motor.
Preferably, the inclined key groove comprises a short groove body, a long groove body and an inclined groove bottom, wherein the short groove body and the long groove body are parallel to each other; the degree of depth H3 of short groove body can be 3 ~ 5mm, and the degree of depth H4 of long groove body can be 4 ~ 6mm, and the groove width W2 that short groove body and long groove body formed can be 8 ~ 12 mm. The inclined key groove is provided with a long groove body and a short groove body, so that the front side and the back side of the rotor punching sheet can be conveniently identified according to the long groove body and the short groove body during lamination, the burr directions of the rotor punching sheet are ensured to be consistent, and the flatness of a laminated rotor core is improved; through setting up the tank bottom slope, there is the hypotenuse transition in the both sides wall that makes oblique keyway, can effectively release the stress that oblique keyway received.
Preferably, the flat key groove comprises a left groove body, a right groove body and an inner groove body; the degree of depth H5 of left side groove body and right groove body can be 3.5 ~ 5.5mm, and the groove width W3 that left side groove body and right groove body formed can be 8 ~ 12 mm.
To the rotor punching, the technical scheme of the utility model is that: the special rotor punching sheet for the high-power variable frequency motor comprises a rotor punching sheet body, wherein a shaft hole for mounting a rotating shaft is formed in the middle of the rotor punching sheet body, and a group of rotor punching sheet grooves are uniformly formed in the edge of the rotor punching sheet body along the circumferential direction; two key grooves are symmetrically arranged on the inner wall of the shaft hole, one key groove is an inclined key groove, the bottom of the inclined key groove is an inclined plane, the other key groove is a flat key groove, and the bottom of the flat key groove is a plane; the rotor punching sheet groove is a round dome bottom groove with a large top end and a small bottom end, and the top end of the rotor punching sheet groove is provided with a notch; and a group of ventilation holes are formed in the annular surface between the rotor punching sheet groove and the shaft hole along the circumferential direction.
Compared with the prior art, the special rotor punching sheet for the high-power variable frequency motor has the advantages of low raw material consumption, low manufacturing cost and convenience in processing and manufacturing; the rotor punching sheet groove is designed into a round dome bottom groove with a large top end and a small bottom end, so that the variable frequency motor has higher starting torque, can be started at low frequency, can weaken the influence of higher harmonic waves of a frequency converter on the vibration of the motor, and can reduce the noise of the motor; the rotor punching sheet is provided with the ventilation holes, so that the ventilation effect is improved, the ventilation and heat dissipation of the motor at high and low frequencies are facilitated, the temperature rise of the motor is reduced, and the service life of the motor is prolonged.
For optimization, 58 rotor punching grooves are uniformly formed in the rotor punching body; the top radius R1 of rotor punching groove is 4.7mm, bottom radius R2 is 2.5mm, notch width W1 is 1.5mm, notch height H1 is 1mm, groove depth H2 is 49.05mm, and air gap length G is 0.9 mm. At the moment, the torque pulsation of the motor is small, the operation is stable, the starting torque of the motor can reach 2.4-2.8 times of the rated torque of the motor, and the noise of the motor can be reduced by 6-7dB (A).
Drawings
Fig. 1 is a schematic structural diagram of a rotor sheet dedicated for a variable frequency motor of the present invention;
FIG. 2 is a schematic size diagram of a rotor sheet dedicated for a variable frequency motor according to the present invention;
fig. 3 is a schematic size diagram of a rotor punching slot in the present invention;
fig. 4 is a schematic size diagram of the oblique key slot of the present invention;
fig. 5 is a schematic size diagram of the flat key groove of the present invention.
The labels in the figures are: 1-rotor punching sheet body, 101-shaft hole, 102-rotor punching sheet groove, 103-inclined key groove, 104-flat key groove and 105-vent hole.
Detailed Description
The following description is made with reference to the accompanying drawings and examples, but not to be construed as limiting the invention.
Example (b):
referring to fig. 1 and 2, the special rotor sheet for the high-power inverter motor of the present invention includes a rotor sheet body 1 (the rotor sheet body 1 is circular, and has a diameter D3 of 375mm), a shaft hole 101 (a shaft hole diameter D4 of 110mm) for installing a rotating shaft is provided in the middle of the rotor sheet body 1, and a set of rotor sheet grooves 102 (the rotor sheet grooves 102 are symmetrically arranged in the left-right direction, and the central lines of the bilateral symmetry are arranged along the radial direction of the rotor sheet body 1) are uniformly provided along the circumferential direction at the edge of the rotor sheet body 1; two key grooves are symmetrically arranged on the inner wall of the shaft hole 101, one key groove is an inclined key groove 103 (the inclined key groove 103 can be used for arranging pieces and marks in the machining process of the rotor punching aluminum casting process, has an identification function and is convenient for production personnel to overlap and assemble), the groove bottom of the inclined key groove 103 is an inclined surface, the other key groove is a flat key groove 104 (the flat key groove 103 can be abutted to the key of the rotating shaft so as to limit the rotor punching to circumferentially rotate relative to the rotating shaft), and the groove bottom of the flat key groove 104 is a plane; the rotor punching groove 102 is a round bottom groove with a large top end and a small bottom end, and the top end is provided with a notch; a group of vent holes 105 are formed in the annular surface between the rotor punching groove 102 and the shaft hole 101 along the circumferential direction.
Referring to fig. 3, in the present embodiment, the top radius R1 of the rotor punching slot 102 is 4.7mm, the bottom radius R2 is 2.5mm, the width W1 of the notch is 1.5mm, the height H1 of the notch is 1mm, the depth H2 of the slot is 49.05mm, and the length G of the air gap is 0.9mm (the bottom end of each rotor punching slot 102 is distributed on a circumference with a diameter D5 of 275.1 mm). At the moment, the starting torque of the motor can reach 2.4-2.8 times of the rated torque of the motor, and the motor noise can be reduced by 6-7dB (A).
In this embodiment, 58 rotor punching grooves 102 are uniformly formed in the rotor punching body 1. At the moment, the motor has small torque pulsation, stable operation, stronger anti-interference capability and smaller noise.
In this embodiment, each of the ventilation holes 105 is a circular hole (the ventilation holes 105 may also be configured as a polygonal hole, or other shapes), and the diameter D1 of each ventilation hole 105 is 36 mm. The vent holes 105 are round holes, and are simple in structure and convenient to manufacture.
Further, 12 vent holes 105 are uniformly formed in the rotor punching sheet body 1; two adjacent vent holes 105 are arranged symmetrically along the radial direction, and the center of each vent hole 105 is distributed on the circumference with the diameter D2 of 180 mm. The adjacent ventilation holes 105 are symmetrically arranged in the radial direction, so that the stress balance is facilitated, the heat inside the motor can better circulate, the heat circulation inside the motor is enhanced, the heat is distributed as fast as possible, the reliability of the use of the rotor punching sheet is improved, and the running performance of the motor is ensured.
Referring to fig. 4, in the present embodiment, the inclined key slot 103 includes a short slot body and a long slot body that are parallel to each other, and an inclined slot bottom; the depth H3 of the short groove body is 4mm, the depth H4 of the long groove body is 5mm, and the groove width W2 formed by the short groove body and the long groove body is 10 mm. The inclined key groove 103 is provided with a long groove body and a short groove body, so that the front side and the back side of the rotor punching sheet can be conveniently identified according to the long groove body and the short groove body during lamination, the burr directions of the rotor punching sheet are ensured to be consistent, and the flatness of a laminated rotor core is improved; by obliquely arranging the groove bottom, oblique edge transition exists on two side walls of the oblique key groove 103, and stress on the oblique key groove 103 can be effectively released.
Referring to fig. 5, in the present embodiment, the flat key groove 104 includes a left groove body, a right groove body, and an inner groove body; the degree of depth H5 of left side groove body and right groove body is 4.5mm, and the groove width W3 that left side groove body and right groove body formed is 10 mm.
The utility model discloses a high-power variable frequency motor, which comprises a motor rotor; the motor rotor is formed by stacking rotor punching sheets; the rotor punching sheet is a rotor punching sheet special for the high-power variable frequency motor.
The above general description of the invention and the description of its specific embodiments in this application should not be construed as limiting the scope of the invention. Those skilled in the art can add, reduce or combine the technical features disclosed in the general description and/or the specific embodiments (including the examples) to form other technical solutions within the scope of the present application according to the disclosure of the present application without departing from the components of the present invention.
Claims (10)
1. A high-power variable frequency motor comprises a motor rotor; the motor rotor is formed by stacking rotor punching sheets; the rotor punching sheet comprises a rotor punching sheet body (1), a shaft hole (101) for mounting a rotating shaft is formed in the middle of the rotor punching sheet body (1), and a group of rotor punching sheet grooves (102) are uniformly formed in the edge of the rotor punching sheet body (1) along the circumferential direction; the method is characterized in that: two key grooves are symmetrically arranged on the inner wall of the shaft hole (101), one key groove is an inclined key groove (103), the groove bottom of the inclined key groove (103) is an inclined plane, the other key groove is a flat key groove (104), and the groove bottom of the flat key groove (104) is a plane; the rotor punching sheet groove (102) is a round dome bottom groove with a large top end and a small bottom end, and the top end is provided with a notch; and a group of vent holes (105) are formed in the annular surface between the rotor punching groove (102) and the shaft hole (101) along the circumferential direction.
2. The high power inverter motor of claim 1, wherein: the rotor punching sheet body (1) is uniformly provided with 58 rotor punching sheet grooves (102).
3. The high power inverter motor of claim 2, wherein: the top radius R1 of the rotor punching groove (102) is 4.7mm, the bottom radius R2 is 2.5mm, the notch width W1 is 1.5mm, the notch height H1 is 1mm, the groove depth H2 is 49.05mm, and the air gap length G is 0.9 mm.
4. The high power inverter motor of claim 1, wherein: each ventilation hole (105) is a round hole, and the diameter D1 of each ventilation hole (105) is 36 mm.
5. The high power inverter motor of claim 4, wherein: the rotor punching sheet body (1) is uniformly provided with 12 ventilation holes (105).
6. The high-power variable-frequency motor according to claim 5, characterized in that: two adjacent vent holes (105) are symmetrically arranged along the radial direction, and the circle center of each vent hole (105) is distributed on the circumference with the diameter D2 of 180 mm.
7. The high power inverter motor of claim 1, wherein: the inclined key groove (103) comprises a short groove body, a long groove body and an inclined groove bottom which are parallel to each other; the depth H3 of the short groove body is 3-5 mm, the depth H4 of the long groove body is 4-6 mm, and the groove width W2 formed by the short groove body and the long groove body is 8-12 mm.
8. The high power inverter motor of claim 1, wherein: the flat key groove (104) comprises a left groove body, a right groove body and an inner groove body; the degree of depth H5 of left side groove body and right groove body is 3.5 ~ 5.5mm, and the groove width W3 that left side groove body and right groove body formed is 8 ~ 12 mm.
9. The rotor punching sheet special for the high-power variable frequency motor comprises a rotor punching sheet body (1), wherein a shaft hole (101) for mounting a rotating shaft is formed in the middle of the rotor punching sheet body (1), and a group of rotor punching sheet grooves (102) are uniformly formed in the edge of the rotor punching sheet body (1) along the circumferential direction; the method is characterized in that: two key grooves are symmetrically arranged on the inner wall of the shaft hole (101), one key groove is an inclined key groove (103), the groove bottom of the inclined key groove (103) is an inclined plane, the other key groove is a flat key groove (104), and the groove bottom of the flat key groove (104) is a plane; the rotor punching sheet groove (102) is a round dome bottom groove with a large top end and a small bottom end, and the top end is provided with a notch; and a group of vent holes (105) are formed in the annular surface between the rotor punching groove (102) and the shaft hole (101) along the circumferential direction.
10. The special rotor punching sheet for the high-power variable frequency motor according to claim 9, characterized in that: 58 rotor punching grooves (102) are uniformly formed in the rotor punching body (1); the top radius R1 of the rotor punching groove (102) is 4.7mm, the bottom radius R2 is 2.5mm, the notch width W1 is 1.5mm, the notch height H1 is 1mm, the groove depth H2 is 49.05mm, and the air gap length G is 0.9 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121698804.5U CN215221849U (en) | 2021-07-26 | 2021-07-26 | High-power variable frequency motor and special rotor punching sheet thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121698804.5U CN215221849U (en) | 2021-07-26 | 2021-07-26 | High-power variable frequency motor and special rotor punching sheet thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215221849U true CN215221849U (en) | 2021-12-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121698804.5U Active CN215221849U (en) | 2021-07-26 | 2021-07-26 | High-power variable frequency motor and special rotor punching sheet thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215221849U (en) |
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2021
- 2021-07-26 CN CN202121698804.5U patent/CN215221849U/en active Active
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