CN210724352U - Improved three-phase asynchronous motor - Google Patents
Improved three-phase asynchronous motor Download PDFInfo
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- CN210724352U CN210724352U CN201922406073.1U CN201922406073U CN210724352U CN 210724352 U CN210724352 U CN 210724352U CN 201922406073 U CN201922406073 U CN 201922406073U CN 210724352 U CN210724352 U CN 210724352U
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Abstract
The utility model belongs to the technical field of motors, in particular to an improved three-phase asynchronous motor, 1, the rotor punching sheet comprises a circular punching sheet body, a plurality of rotor punching sheet grooves are uniformly distributed in the peripheral scattering shape of the excircle of the circular punching sheet body, and the rotor punching sheet grooves are an integral special-shaped groove formed by splicing a first right-angle trapezoidal groove, a first rectangular groove, a second right-angle trapezoidal groove and a third right-angle trapezoidal groove; the rotor punching sheet groove is inclined towards the outer side from the inner side of the circular punching sheet body. The utility model makes the rotor magnetic circuit relatively uniform, and reduces the harmonic content in the air gap flux density; the rotor groove type becomes shorter and thicker, the leakage inductance is reduced, and the overload capacity is strong at the same rotating speed; the rotor is simple and convenient to stack.
Description
Technical Field
The utility model belongs to the technical field of the motor, concretely relates to modified three-phase asynchronous motor.
Background
The three-phase asynchronous motor is a kind of induction motor, and is a kind of motor powered by 380V three-phase alternating current, and is called a three-phase asynchronous motor because the rotor and the stator rotating magnetic field of the three-phase asynchronous motor rotate in the same direction and at different rotating speeds, and there is slip. The rotating speed of the rotor of the three-phase asynchronous motor is lower than that of a rotating magnetic field, and the rotor winding generates electromotive force and current due to relative motion between the rotor winding and the magnetic field and interacts with the magnetic field to generate electromagnetic torque so as to realize energy conversion.
Traditional three-phase asynchronous motor is inefficient, decides, rotor slot ratio is unfavorable for the motor efficiency to improve, and the cell type does not have radial slope, even use double-deck concentric type low harmonic winding, its harmonic component still is great, is unfavorable for the motor efficiency to improve.
Disclosure of Invention
In view of the defect that the background art exists, the utility model provides a modified three-phase asynchronous motor, it has effectively solved traditional three-phase asynchronous motor inefficiency, the big defect of motor loss.
In order to achieve the above purpose, the technical scheme adopted by the utility model is an improved three-phase asynchronous motor, which comprises a shell, end covers at two ends of the shell, a rotor, a stator, a rotating shaft and a bearing; the rotor punching sheet comprises a circular punching sheet body, a plurality of rotor punching sheet grooves are uniformly distributed in a scattering shape in the circumferential direction of the outer circle of the circular punching sheet body, and the rotor punching sheet grooves are integrated special-shaped grooves formed by splicing a first right-angle trapezoidal groove, a first rectangular groove, a second right-angle trapezoidal groove and a third right-angle trapezoidal groove; the rotor punching sheet groove is inclined towards the outer side from the inner side of the circular punching sheet body.
Further, the rotor punching sheet groove deflection angle is 13.5 degrees.
Based on above-mentioned technical scheme, adopt new-type radial chute, rotor towards piece groove slope 1.5 rotor groove angle (13.5 °), its advantage lies in: the magnetic circuit of the rotor is relatively uniform, and the harmonic content in the air gap flux density is reduced; the rotor groove type becomes shorter and thicker, the leakage inductance is reduced, and the overload capacity is strong at the same rotating speed; the rotor is simple and convenient to stack. Stray losses are effectively reduced compared with the traditional Y2 rotor slot type. And a novel high-efficiency fan and a novel blast cap are adopted, so that the mechanical loss is reduced.
Furthermore, 40 rotor punching grooves are arranged.
Based on the technical scheme, the rotor consists of a cast aluminum rotor and a rotating shaft, the cast aluminum rotor consists of a rotor core and aluminum, and the rotor core is formed by laminating rotor punching sheets. The rotor punching sheet adopts 40-slot closed slots, and stray loss is effectively reduced compared with the traditional Y2 rotor slot type. And a novel high-efficiency fan and a novel blast cap are adopted, so that the mechanical loss is reduced.
Further, first right angle dovetail groove right-angle waist, first rectangular groove long limit, second right angle dovetail groove right-angle waist, third right angle dovetail groove base all incline 13.5 to same one side, first right angle dovetail groove base and first rectangular groove broadside collineation, another broadside of first rectangular groove and second right angle dovetail groove base collineation, third right angle dovetail groove right-angle waist and second right angle dovetail groove topside collineation.
Further, the width of the first rectangular groove is 4.3 mm; the width of the bottom edge of the first right-angle trapezoidal groove is 5.6mm, the length of the top edge of the first right-angle trapezoidal groove is 2.3mm, and the length of the right-angle waist is 18 mm; the side length of the top of the third right-angle trapezoid groove is 0.4 mm.
Further, the rotor punching groove is a closed groove.
Furthermore, an inclined key groove is formed in the inner circular surface of the circular punching sheet body, and the deepest part of the inclined key groove is an inclined plane.
Furthermore, the stator comprises stator core and stator winding, and the stator core of stator is folded by the stator punching and is pressed and form, and the stator punching includes the ring shape towards the piece body, circle circumference scattering form evenly distributed a plurality of stator punching grooves in the ring shape towards the piece body, stator punching groove is a whole special-shaped groove that the inside concatenation of ring shape towards the piece body of second rectangle groove, first class waist dovetail groove, second class waist dovetail groove, semicircular groove is outside.
Preferably, the stator winding adopts a double-layer concentric low-harmonic winding with the pitch of 1-12/2-11/3-10/4-9 and the number of turns of 43/42/20/9.
Based on above-mentioned technical scheme, the distribution of the number of turns is close sinusoidal, compares traditional Y2 motor individual layer cross winding, effectively reduces motor harmonic, stray loss, electromagnetic noise and vibration, reduces stator resistance, reduces stator copper and consumes.
Preferably, 48 stator punching sheet slots are arranged.
Based on above-mentioned technical scheme, stator core is laminated by the stator punching and is formed, and the stator punching adopts 48 grooves, and every utmost point every looks slot number is 4, compares 36 grooves of traditional Y2 motor, and every utmost point every looks slot number is 3, cooperates double-deck concentric type low harmonic winding, can make the magnetic potential wave form more be close sinusoidal, reduction harmonic that can be better, reduces stray loss.
It should be noted that, the stator and rotor core punching sheets are made of 50AW350H, so that the magnetic conductivity can be high while the iron loss is low, the reduction of power factor caused by the reduction of magnetic conductivity when high-grade silicon steel sheets are used is avoided, and the iron loss is effectively reduced.
The utility model has the advantages that: the motor loss is reduced, and the motor efficiency is improved.
Drawings
Fig. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of a rotor sheet structure;
FIG. 3 is a schematic size diagram of a rotor sheet;
FIG. 4 is a schematic view of a rotor punching slot structure;
FIG. 5 is a schematic view of a slanted keyway structure;
FIG. 6 is a schematic view of a stator lamination structure;
FIG. 7 is a schematic view of a stator punching slot structure;
in the figure: 1. casing, 2, the end cover, 3, the rotor, 4, the stator, 5, the pivot, 6, the bearing, 7, rotor punching piece circle face towards the piece body, 8, rotor punching piece groove, 8.1, first right angle is trapezoidal, 8.2, first rectangle groove, 8.3, second right angle dovetail groove, 8.4, third right angle dovetail groove, 9, the oblique key groove, 10, stator punching piece circle face towards the piece body, 11, stator punching piece groove, 11.1, second rectangle groove, 11.2, first class waist dovetail groove, 11.3, second class waist dovetail groove, 11.4, half-round groove.
Detailed Description
An improved three-phase asynchronous motor comprises a shell 1, end covers 2 at two ends of the shell, a rotor 3, a stator 4, a rotating shaft 5 and a bearing 6; the rotor core of the rotor 3 is formed by laminating rotor punching sheets, each rotor punching sheet comprises a rotor punching sheet circular punching sheet body 7, a plurality of rotor punching sheet grooves 8 are uniformly distributed in a scattering shape in the circumferential direction of the outer circle of the rotor punching sheet circular punching sheet body 7, and each rotor punching sheet groove 8 is an integral special-shaped groove formed by splicing a first right-angle trapezoidal groove 8.1, a first rectangular groove 8.2, a second right-angle trapezoidal groove 8.3 and a third right-angle trapezoidal groove 8.4; the rotor punching sheet groove is formed by inclining the inner side of the rotor punching sheet circular punching sheet body 7 to the outer side. As shown in fig. 1-7, the dimensions are in mm.
Further, the deflection angle of the rotor punching sheet groove 8 is 13.5 degrees.
Furthermore, 40 rotor punching grooves 8 are arranged.
Further, 8.1 right angled waist in first right angle dovetail groove, 8.2 long limits in first rectangular groove, 8.3 right angled waist in second right angle dovetail groove, the equal one side skew 13.5 in third right angle dovetail groove 8.4 base, 8.1 base in first right angle dovetail groove and 8.2 broadside collineations in first rectangular groove, another broadside in first rectangular groove 8.2 and 8.3 base collineations in second right angle dovetail groove, 8.4 right angled waist in third right angle dovetail groove and 8.3 topside collineations in second right angle dovetail groove.
Further, the width of the first rectangular groove 8.2 is 4.3 mm; the width of the bottom edge of the first right-angle trapezoidal groove is 5.6mm, the length of the top edge of the first right-angle trapezoidal groove 8.1 is 2.3mm, and the length of the right-angle waist is 18 mm; the length of the top edge of the third right-angle trapezoidal groove 8.4 is 0.4 mm.
Further, the rotor punching groove 8 is a closed groove.
Furthermore, an inclined key groove 9 is formed in the inner circular surface of the circular punching sheet body 7 of the rotor punching sheet, and the deepest part of the inclined key groove 9 is an inclined plane.
Further, the stator comprises a stator core and a stator winding, the stator core of the stator is formed by laminating stator punching sheets, the stator punching sheets comprise a stator punching sheet circular punching sheet body 10, a plurality of stator punching sheet grooves 11 are uniformly distributed in the stator punching sheet circular punching sheet body 10 in a circle circumferential scattering shape, and the stator punching sheet grooves 11 are a whole special-shaped groove formed by splicing a second rectangular groove 11.1, a first isosceles trapezoid groove 11.2, a second isosceles trapezoid groove 11.3 and a semicircular groove 11.4 from the inside to the outside of the stator punching sheet circular punching sheet body 10.
Preferably, the stator winding adopts a double-layer concentric low-harmonic winding with the pitch of 1-12/2-11/3-10/4-9 and the number of turns of 43/42/20/9.
Preferably, 48 stator punching grooves 11 are provided.
Taking a 160M-4, 11kW motor as an example, the following experimental data are compared:
through experimental data, it can be seen that the utility model discloses IE4 energy efficiency requirement 93.3% (+/-0.01005) in IEC60034-30-1:2014 can be reached.
The embodiment effectively solves the problem that the traditional 4-pole three-phase asynchronous motor with the base number of 160 is low in efficiency and cannot meet the requirement of IE4 energy efficiency in IEC60034-30-1:2014, and achieves the purposes of reducing motor loss and improving motor efficiency.
The above embodiments are merely illustrative of the principles and effects of the present invention, and are not to be construed as limiting the invention. Modifications and variations can be made to the above-described embodiments by those skilled in the art without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.
Claims (10)
1. An improved three-phase asynchronous motor comprises a shell, end covers at two ends of the shell, a rotor, a stator, a rotating shaft and a bearing; wherein the rotor core of rotor is folded by the rotor punching and is formed its characterized in that: the rotor punching sheet comprises a circular punching sheet body, a plurality of rotor punching sheet grooves are uniformly distributed in a scattering shape in the circumferential direction of the outer circle of the circular punching sheet body, and the rotor punching sheet grooves are integrated special-shaped grooves formed by splicing a first right-angle trapezoidal groove, a first rectangular groove, a second right-angle trapezoidal groove and a third right-angle trapezoidal groove; the rotor punching sheet groove is inclined towards the outer side from the inner side of the circular punching sheet body.
2. An improved three-phase asynchronous motor, according to claim 1, characterized in that: the rotor punching sheet groove deflection angle is 13.5 degrees.
3. An improved three-phase asynchronous motor, according to claim 1, characterized in that: the number of the rotor punching grooves is 40.
4. An improved three-phase asynchronous motor, according to claim 1, characterized in that: the bottom edges of the first right-angle trapezoidal groove, the first rectangular groove long edge, the second right-angle trapezoidal groove right-angle waist and the third right-angle trapezoidal groove all incline 13.5 degrees to the same side, the bottom edge of the first right-angle trapezoidal groove is collinear with the wide edge of the first rectangular groove, the other wide edge of the first rectangular groove is collinear with the bottom edge of the second right-angle trapezoidal groove, and the right-angle waist of the third right-angle trapezoidal groove is collinear with the top edge of the second right-angle trapezoidal groove.
5. An improved three-phase asynchronous motor, according to claim 1, characterized in that: the width of the first rectangular groove is 4.3 mm; the width of the bottom edge of the first right-angle trapezoidal groove is 5.6mm, the length of the top edge of the first right-angle trapezoidal groove is 2.3mm, and the length of the right-angle waist is 18 mm; the side length of the top of the third right-angle trapezoid groove is 0.4 mm.
6. An improved three-phase asynchronous motor, according to claim 1, characterized in that: the rotor punching groove is a closed groove.
7. An improved three-phase asynchronous motor, according to claim 1, characterized in that: an inclined key groove is formed in the inner circular surface of the circular punching sheet body, and the deepest part of the inclined key groove is an inclined plane.
8. An improved three-phase asynchronous motor, according to claim 1, characterized in that: the stator is composed of a stator core and a stator winding, the stator core of the stator is formed by laminating stator punching sheets, each stator punching sheet comprises a circular punching sheet body, a plurality of stator punching sheet grooves are uniformly distributed in the circular punching sheet body in a circumferential scattering mode, and each stator punching sheet groove is a whole special-shaped groove formed by splicing a second rectangular groove, a first isosceles trapezoid groove, a second isosceles trapezoid groove and a semi-circular groove from the inside to the outside of the circular punching sheet body.
9. An improved three-phase asynchronous motor, according to claim 8, characterized in that: the stator winding adopts a double-layer concentric low-harmonic winding with the pitch of 1-12/2-11/3-10/4-9 and the number of turns of 43/42/20/9.
10. An improved three-phase asynchronous motor, according to claim 8, characterized in that: 48 stator punching sheet grooves are formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922406073.1U CN210724352U (en) | 2019-12-27 | 2019-12-27 | Improved three-phase asynchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922406073.1U CN210724352U (en) | 2019-12-27 | 2019-12-27 | Improved three-phase asynchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210724352U true CN210724352U (en) | 2020-06-09 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922406073.1U Active CN210724352U (en) | 2019-12-27 | 2019-12-27 | Improved three-phase asynchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210724352U (en) |
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2019
- 2019-12-27 CN CN201922406073.1U patent/CN210724352U/en active Active
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