CN210225083U - Motor rotor punching sheet with deep-groove type three-groove continuous structure - Google Patents
Motor rotor punching sheet with deep-groove type three-groove continuous structure Download PDFInfo
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- CN210225083U CN210225083U CN201920946583.5U CN201920946583U CN210225083U CN 210225083 U CN210225083 U CN 210225083U CN 201920946583 U CN201920946583 U CN 201920946583U CN 210225083 U CN210225083 U CN 210225083U
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Abstract
The utility model discloses a deep slot type three-groove continuous structure's electric motor rotor towards piece relates to the motor field. The current rotor punching sheet of the three-phase asynchronous motor is mostly of a single-groove-shaped open slot structure, burrs are easy to process, and the grooves can cause uneven magnetic density distribution to influence the material utilization rate and the power density of the motor. The utility model discloses a punching sheet groove is the long and thin closed flute profile of deep trouth formula continuous structure, include from punching the radial outside of piece to inboard communicating first slot part in succession, connect slot part and second slot part, first slot part is polygonized structure, connects the rectangle structure that the slot part is the bottleneck form, and the second slot part is isosceles trapezoid, and the sectional area of second slot part is greater than first slot part, and the sectional area of first slot part is greater than and connects the slot part, and the distance towards piece groove top is 2 times of air gap towards the distance towards the piece excircle. The structure optimizes by utilizing the skin effect when the motor is started, can effectively reduce electromagnetic noise, reduce the additional loss and the tooth space pulsation loss on the surface of the rotor, improve the starting performance and improve the motor efficiency.
Description
Technical Field
The utility model relates to the field of electric machines, especially, relate to a motor rotor towards piece of deep slot type three-groove continuous structure.
Background
Rotor punching sheets used by the conventional three-phase asynchronous motor are mostly of a single-groove open slot structure, and burrs are easily generated in the groove shape of an open slot rotor in actual processing, so that the noise of the motor is adversely affected; for a motor with certain special working condition requirements, such as higher efficiency under a rated state and excellent starting performance in a starting process, the traditional rotor convex groove design can play a role in controlling starting current and increasing starting torque, but the serious non-uniform phenomenon that the upper part of a rotor tooth with magnetic density distribution is too sparse and the lower part of the rotor tooth is saturated can be caused, and the material utilization rate and the power density of the motor are influenced. Therefore, the utility model discloses a novel high-efficient rotor punching that the skin effect when utilizing the motor to start and design carries out effectively to reduce motor noise, improves motor efficiency and improves motor startability.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model and the technical task that provides are perfected and improved prior art scheme, provide a deep groove formula three-groove continuous structure's electric motor rotor towards piece to effectively reduce motor noise, improve motor efficiency and aim at. Therefore, the utility model adopts the following technical scheme.
A motor rotor punching sheet with a deep groove type three-groove continuous structure is characterized in that punching sheet grooves are uniformly distributed on the rotor punching sheet in a surrounding manner, the punching sheet grooves are symmetrical according to the radial central line of the punching sheet grooves, the punching sheet grooves are in a deep groove type three-groove continuous structure and are in a slender shape, the punching sheet grooves comprise a first groove part positioned on the radial outer side and a second groove part positioned on the radial inner side, the first groove part and the second groove part are communicated through a bottleneck-shaped connecting groove part positioned in the middle, the first groove part is of a polygonal structure, the connecting groove part is of a rectangular structure, the sectional area of the second groove part is larger than that of the first groove part, the sectional area of the first groove part is larger than that of the connecting groove part, the width of the connecting groove part is 1/2-1/3 of the width of the first groove part, the radial length of the connecting groove part is 1.1-1.5 times of the first groove part, and the distance from the top of the first groove part to the excircle of the punching sheet is 1.8-2.2 times of the air gap. The structure of the punching sheet groove is optimized by utilizing the skin effect when the motor is started, and the second groove part has the largest sectional area and smaller resistance, so that the motor plays a main role in running and can be called as a working cage; the sectional area of the first slot part is smaller than that of the second slot part, so that the resistance is larger, and the motor plays a main role when being started, and can be called as a starting cage; the connecting groove part is in a bottleneck shape; the structure can effectively reduce electromagnetic noise, reduce additional loss and tooth space pulsation loss on the surface of the rotor, improve starting performance and improve motor efficiency.
As a preferable technical means: the punching sheet groove is in a closed groove shape. The closed groove shape can effectively reduce the generation of burrs in the punching sheet processing, and can better reduce the electromagnetic noise.
As a preferable technical means: the groove top of the first groove part on the radial outer side of the stamped sheet is a polygonal corner, and two adjacent sides of two adjacent first groove parts are parallel. The magnetic density distribution is more uniform, and the power density of the motor can be effectively improved.
As a preferable technical means: the second groove parts are of a trapezoidal structure, the width of the trapezoidal bottom of the second groove part, which is positioned on the radial outer side of the stamped sheet, is greater than the width of the trapezoidal top of the stamped sheet, which is positioned on the radial inner side of the stamped sheet, and two side edges of every two adjacent second groove parts are parallel. The magnetic density distribution is more uniform, and the power density of the motor can be better improved.
As a preferable technical means: the distance from the bottom edge of the radial inner side of the punching sheet groove to the inner circle of the punching sheet is 0.6-1 time of the distance from the bottom edge to the outer circle of the punching sheet. The wider rotor tooth yoke part formed by the closed groove-shaped rotor punching sheet is reasonable in magnetic density distribution, and the rotor squirrel cage has the advantages of small running resistance and good skin effect, so that the motor efficiency is improved by reducing the copper loss of the rotor, the starting torque is improved, the starting current is reduced, the starting performance of the motor is improved, the electromagnetic noise is reduced, and the material utilization rate is improved.
Has the advantages that:
1. the structure of the punching sheet groove is optimized by utilizing the skin effect when the motor is started, so that the electromagnetic noise can be effectively reduced, the additional loss and the tooth groove pulsation loss on the surface of the rotor are reduced, the starting performance is improved, and the motor efficiency is improved.
2. The punching sheet groove in the closed groove shape can effectively reduce the generation of burrs in the punching sheet processing, and can better reduce the electromagnetic noise.
3. The parallel structure of adjacent slot edges and the wider rotor tooth yoke part of the closed slot shape enable the magnetic density distribution to be reasonable, so that the rotor squirrel cage has the advantages of small running resistance and good skin effect, thereby reducing the copper consumption of the rotor, improving the motor efficiency, simultaneously improving the starting torque, reducing the starting current, better improving the motor power density, reducing the electromagnetic noise and improving the material utilization rate.
4. On the premise that the performance requirement of the motor is not changed, the motor with the deep-groove type three-groove continuous groove structure can reduce the manufacturing cost by 3% -5%, and the noise can be reduced by about 4 dB.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the structure of the sheet punching groove of the present invention.
In the figure: 1-punching a sheet groove; 2-punching the excircle; 3-punching the inner circle; 101-a first slot portion; 102-a second slot portion; 103-connecting groove portions; 104-groove top.
Detailed Description
The technical solution of the present invention will be further described in detail with reference to the accompanying drawings.
As shown in fig. 1-2, a motor rotor punching sheet with a deep-groove three-groove continuous structure is provided, punching grooves 1 are uniformly distributed on a rotor punching sheet in a surrounding manner, the punching grooves 1 are symmetrical according to a radial central line of the punching grooves 1, the punching grooves 1 are in an elongated shape of the deep-groove three-groove continuous structure, and include a first groove portion 101 located on a radial outer side and a second groove portion 102 located on a radial inner side, the first groove portion 101 and the second groove portion 102 are communicated through a bottleneck-shaped connecting groove portion 103 located in the middle, the first groove portion 101 is in a polygonal structure, the connecting groove portion 103 is in a rectangular structure, the sectional area of the second groove portion 102 is larger than that of the first groove portion 101, the sectional area of the first groove portion 101 is larger than that of the connecting groove portion 103, the width of the connecting groove portion 103 is 1/2 of the width of the first groove portion 101, the radial length of the connecting groove portion 103 is 1.1 time of the first groove portion 101, and.
In order to reduce the generation of burrs in the machining process, the punching sheet groove 1 is in a closed groove shape. The closed groove shape can effectively reduce the generation of burrs in the punching sheet processing, and can better reduce the electromagnetic noise.
In order to improve the power density of the motor, the groove top 104 of the first groove part 101 at the radial outer side of the stamped sheet is a corner of a polygon, and two adjacent sides of two adjacent first groove parts 101 are parallel. The magnetic density distribution is more uniform, and the power density of the motor can be effectively improved.
In order to better improve the power density of the motor, the second groove parts 102 are in a trapezoidal structure, the width of the trapezoidal bottom of each second groove part located on the radial outer side of the stamped sheet is larger than the width of the trapezoidal top of each second groove part located on the radial inner side of the stamped sheet, and two side edges of every two adjacent second groove parts 102 are parallel. The magnetic density distribution is more uniform, and the power density of the motor can be better improved.
In order to improve the starting performance of the motor, the distance from the bottom edge of the radial inner side of the punching sheet groove 1 to the punching sheet inner circle 3 is 0.8 times the distance from the bottom edge to the punching sheet outer circle 2. The wider rotor tooth yoke part formed by the closed groove-shaped rotor punching sheet is reasonable in magnetic density distribution, and the rotor squirrel cage has the advantages of small running resistance and good skin effect, so that the motor efficiency is improved by reducing the copper loss of the rotor, the starting torque is improved, the starting current is reduced, the starting performance of the motor is improved, the electromagnetic noise is reduced, and the material utilization rate is improved.
The structure of the punching sheet groove 1 is optimized by utilizing the skin effect when the motor is started, and the second groove part 102 has the largest sectional area and smaller resistance, so that the motor plays a main role in running and can be called as a working cage; the first slot 101 has a smaller cross-sectional area than the second slot 102, so that the resistance is larger, and the motor plays a main role in starting, and can be called as a starting cage; the connecting groove part 103 is in a bottleneck shape; the structure can effectively reduce electromagnetic noise, reduce additional loss and tooth space pulsation loss on the surface of the rotor, improve starting performance and improve motor efficiency.
The IE 4-160L-218.5 KW motor is improved and optimized by the scheme, and compared with a common rotor motor of the same model, the data are as follows:
according to the table, the comprehensive performance of the motor is improved remarkably, on the premise that the performance requirement of the motor is not changed, the motor with the deep-groove type three-groove continuous groove structure is adopted, the manufacturing cost can be reduced by 3% -5%, and the noise can be reduced by about 4 dB.
The motor rotor punching sheet with deep groove type three-groove continuous structure shown in the above fig. 1-2 is a specific embodiment of the present invention, has embodied the outstanding substantive features and obvious progress of the present invention, and can be modified equally in the aspects of shape, structure, etc. according to the practical use requirement, all within the protection scope of the present scheme.
Claims (5)
1. The utility model provides a motor rotor towards piece of deep slot type three-groove continuous structure, the rotor towards piece on encircle the equipartition and have towards piece groove (1), towards piece groove (1) according to its self radial central line symmetry, its characterized in that: the punching sheet groove (1) is in a long and thin shape of a deep groove type three-groove continuous structure and comprises a first groove part (101) positioned on the radial outer side and a second groove part (102) positioned on the radial inner side, the first groove part (101) and the second groove part (102) are communicated through a bottleneck-shaped connecting groove part (103) positioned in the middle, the first groove part (101) is in a polygonal structure, the connecting groove part (103) is in a rectangular structure, the cross section area of the second groove part (102) is larger than that of the first groove part (101), the cross section area of the first groove part (101) is larger than that of the connecting groove part (103), the width of the connecting groove part (103) is 1/2-1/3 of the width of the first groove part (101), the radial length of the connecting groove part (103) is 1.1-1.5 times of the first groove part (101), and the distance between the groove top (104) of the first groove part (101) and the punching sheet excircle (2) is 1.8-2.2 times of the air gap between the motor rotor and the stator.
2. The motor rotor punching sheet with the deep groove type three-groove continuous structure as claimed in claim 1, characterized in that: the punching sheet groove (1) is in a closed groove shape.
3. The motor rotor punching sheet with the deep groove type three-groove continuous structure as claimed in claim 1, characterized in that: the groove top (104) of the first groove part (101) at the radial outer side of the punching sheet is a polygonal corner, and two adjacent sides of two adjacent first groove parts (101) are parallel.
4. The motor rotor punching sheet with the deep groove type three-groove continuous structure as claimed in claim 1, characterized in that: the second groove parts (102) are of a trapezoidal structure, the width of the trapezoidal bottom of the second groove part located on the radial outer side of the stamped sheet is larger than the width of the trapezoidal top of the second groove part located on the radial inner side of the stamped sheet, and two side edges of every two adjacent second groove parts (102) are parallel.
5. The motor rotor punching sheet with the deep groove type three-groove continuous structure as claimed in claim 2, characterized in that: the distance from the bottom edge of the radial inner side of the punching sheet groove (1) to the punching sheet inner circle (3) is 0.6-1 time of the distance from the bottom edge to the punching sheet outer circle (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920946583.5U CN210225083U (en) | 2019-06-21 | 2019-06-21 | Motor rotor punching sheet with deep-groove type three-groove continuous structure |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920946583.5U CN210225083U (en) | 2019-06-21 | 2019-06-21 | Motor rotor punching sheet with deep-groove type three-groove continuous structure |
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| CN210225083U true CN210225083U (en) | 2020-03-31 |
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| CN201920946583.5U Active CN210225083U (en) | 2019-06-21 | 2019-06-21 | Motor rotor punching sheet with deep-groove type three-groove continuous structure |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110247491A (en) * | 2019-06-21 | 2019-09-17 | 卧龙电气驱动集团股份有限公司 | A kind of motor rotor punching sheet of three slot continuous structure of deep slot type |
-
2019
- 2019-06-21 CN CN201920946583.5U patent/CN210225083U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110247491A (en) * | 2019-06-21 | 2019-09-17 | 卧龙电气驱动集团股份有限公司 | A kind of motor rotor punching sheet of three slot continuous structure of deep slot type |
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