CN216851475U - Low back electromotive force harmonic water pump motor rotor core - Google Patents
Low back electromotive force harmonic water pump motor rotor core Download PDFInfo
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- CN216851475U CN216851475U CN202220192824.3U CN202220192824U CN216851475U CN 216851475 U CN216851475 U CN 216851475U CN 202220192824 U CN202220192824 U CN 202220192824U CN 216851475 U CN216851475 U CN 216851475U
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Abstract
The utility model relates to a low back emf harmonic water pump motor rotor core is folded by a plurality of rotor punching and is pressed and form, the rotor is equipped with a plurality of archs and recess towards the piece edge, and protruding and recess are arranged in turn, arbitrary point on the protruding edge line all is in on the figure that the function formed is confirmed to the arch. The utility model has the advantages that: the projection determining function is used for determining the conformity of the rotor appearance, so that the rotors with different sizes and different magnetic pole numbers can be rapidly produced; counter potential harmonics are optimized by arranging the protrusions and the grooves, and finally, components of torque fluctuation and harmonic current are weakened, so that the purposes of low noise, high stability and high efficiency of the motor are achieved.
Description
Technical Field
The utility model relates to an electrical equipment field especially relates to a low back emf harmonic water pump motor rotor iron core.
Background
In modern society, automobiles have become one of the first choice tools for riding instead of walk. The automobile industry develops rapidly, and with the development of automobile performance towards safer, more reliable, more stable, full-automatic intelligent and environment-friendly energy-saving directions, a large number of electronic water pumps are applied to automobile cooling systems and can well meet the market requirements.
The electronic water pump mainly provides a power source for an engine cooling system of an automobile, the electronic water pump is arranged on the engine, and the counter electromotive force harmonic of the motor of the electronic water pump of the automobile directly influences the torque fluctuation and the harmonic current of the motor and finally influences the vibration and the performance of the engine, so that the suppression of the counter electromotive force harmonic of the permanent magnet electronic water pump has important significance. At present, the traditional rotor appearance is manually corrected based on experience, has great uncertainty, and is difficult to meet the design requirement of ultralow counter potential harmonic distortion rate.
Disclosure of Invention
The utility model mainly provides a can effectual reduction back emf harmonic distortion rate, have the low back emf harmonic water pump motor rotor iron core of fine suppression effect to torque fluctuation and odd harmonic current.
The utility model provides a technical scheme that its technical problem adopted is, a low back electromotive force harmonic water pump motor rotor core, is folded by a plurality of rotor punching and is pressed and form, the rotor is equipped with a plurality of archs and recess towards the piece edge, and the arch is arranged with the recess in turn, arbitrary point on the protruding edge line all is in on the figure that the function formed is confirmed to the arch.
The protruding determining function is used for determining that the shape of the rotor is in accordance with the shape of the rotor, so that the rotors with different sizes and different magnetic pole numbers can be rapidly produced; counter potential harmonics are optimized by arranging the protrusions and the grooves, and finally, components of torque fluctuation and harmonic current are weakened, so that the purposes of low noise, high stability and high efficiency of the motor are achieved.
As a preferable mode of the above, the protrusion determining function includes an X-axis coordinate determining function and a Y-axis coordinate determining function, and the X-axis coordinate determining function is
X(t)＝(R2-(K1*gap/(cos(Po*t)))-(K2*gap/(cos(3*Po*t)))-(K3*gap/(cos(6*Po*t))))*cos(t)
The Y-axis coordinate determining function is
Y(t)＝(R2-(K1*gap/(cos(Po*t)))-(K2*gap/(cos(3*Po*t)))-(K3*gap/(cos(6*Po*t))))*sin(t)
Wherein X (t) is a convex abscissa function; y (t) is a convex ordinate function; r2 is the radius of the inner ring of the stator; gap is the single-side width of the air gap; po is the number of magnetic pole pairs of the rotor; k1 is in the range of 0.2-1; k2 is in the range of 0.1-0.5; k3 is in the range of 0.01-0.05.
In a preferable embodiment of the above, K1 is 0.9, K2 is 0.5, and K3 is 0.02.
As a preferable mode of the above, the groove is a plane, and the plane connects two adjacent protrusions.
As a preferred scheme of the scheme, the center of the rotor punching sheet is provided with a shaft hole.
As a preferable scheme of the scheme, the lightening holes surround the rotor punching sheet and are arranged close to the protrusions.
As a preferred scheme of the scheme, the rotor punching sheet is provided with riveting points.
The utility model has the advantages that: the protruding determining function is used for determining that the shape of the rotor is in accordance with the shape of the rotor, so that the rotors with different sizes and different magnetic pole numbers can be rapidly produced; counter potential harmonics are optimized by arranging the protrusions and the grooves, and finally, components of torque fluctuation and harmonic current are weakened, so that the purposes of low noise, high stability and high efficiency of the motor are achieved.
Drawings
Fig. 1 is a schematic structural diagram of a rotor core of a water pump motor in embodiment 1.
Fig. 2 is a schematic structural diagram of the motor of the water pump in embodiment 1 after the rotor core and the stator are assembled.
1-rotor punching sheet 2-bulge 3-groove 4-riveting point 5-lightening hole 6-shaft hole 7-air gap 8-stator.
Detailed Description
The technical solution of the present invention is further described below by way of examples and with reference to the accompanying drawings.
Example 1:
the rotor core of the low back-emf harmonic water pump motor is formed by laminating a plurality of rotor punching sheets, as shown in fig. 1 and fig. 2, the edge of each rotor punching sheet 1 is provided with a plurality of protrusions 2 and grooves 3, the protrusions 2 and the grooves 3 are alternately arranged, each groove 3 is a plane, each plane is connected with two adjacent protrusions 2, a shaft hole is formed in the center of each rotor punching sheet 1, lightening holes 5 with the same number as the protrusions are formed in each rotor punching sheet 1, the lightening holes 5 surround the rotor punching sheets and are arranged close to the protrusions, riveting points 4 are further arranged on the portions between the lightening holes 5 and the shaft holes 6, and the rotor core is formed by riveting a plurality of rotor punching sheets at the riveting points.
The counter potential harmonic wave is optimized by arranging the protrusions and the grooves, and the components of torque fluctuation and harmonic current are finally weakened, so that the purposes of low noise, high stability and high efficiency of the motor are achieved.
Example 2:
the rotor core of the low back-emf harmonic water pump motor is formed by laminating a plurality of rotor punching sheets, as shown in fig. 1 and fig. 2, the edge of each rotor punching sheet 1 is provided with a plurality of protrusions 2 and grooves 3, the protrusions 2 and the grooves 3 are alternately arranged, each groove 3 is a plane, each plane is connected with two adjacent protrusions 2, a shaft hole is formed in the center of each rotor punching sheet 1, lightening holes 5 with the same number as the protrusions are formed in each rotor punching sheet 1, the lightening holes 5 surround the rotor punching sheets and are arranged close to the protrusions, riveting points 4 are further arranged on the portions between the lightening holes 5 and the shaft holes 6, and the rotor core is formed by riveting a plurality of rotor punching sheets at the riveting points.
In this embodiment, the number and the radian of the protrusions 2 are determined by the protrusion determination function, that is, any point on the edge line of the protrusions 2 is located on the pattern formed by the protrusion determination function. The bump determination function comprises an X-axis coordinate determination function and a Y-axis coordinate determination function, the X-axis coordinate determination function is
X(t)＝(R2-(K1*gap/(cos(Po*t)))-(K2*gap/(cos(3*Po*t)))-(K3*gap/(cos(6*Po*t))))*cos(t)
The Y-axis coordinate determining function is
Y(t)＝(R2-(K1*gap/(cos(Po*t)))-(K2*gap/(cos(3*Po*t)))-(K3*gap/(cos(6*Po*t))))*sin(t)
Wherein X (t) is a convex abscissa function; y (t) is a convex ordinate function; r2 is the stator 8 inner ring radius; gap is the single-side width of the air gap 7; po is the number of magnetic pole pairs of the rotor; k1 is in the range of 0.2-1; k2 is in the range of 0.1-0.5; k3 is in the range of 0.01-0.05. In this example, K1 was 0.9, K2 was 0.5, and K3 was 0.02.
In the embodiment, the protrusion determining function is used for determining the conformity of the rotor appearance, so that the rotors with different sizes and different magnetic pole numbers can be rapidly produced; counter potential harmonics are optimized by arranging the protrusions and the grooves, and finally, components of torque fluctuation and harmonic current are weakened, so that the purposes of low noise, high stability and high efficiency of the motor are achieved.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (8)
1. The utility model provides a low back emf harmonic water pump motor rotor core, is folded by a plurality of rotor punching and is pressed formation characterized by: the rotor punching sheet is characterized in that a plurality of bulges and grooves are arranged at the edge of the rotor punching sheet, the bulges and the grooves are alternately arranged, and any point on the edge line of the bulges is positioned on a graph formed by a bulge determining function.
2. The low back-emf harmonic water pump motor rotor core of claim 1, wherein: the bump determination function comprises an X-axis coordinate determination function and a Y-axis coordinate determination function, wherein the X-axis coordinate determination function is
X(t)＝(R2-(K1*gap/(cos(Po*t)))-(K2*gap/(cos(3*Po*t)))-(K3*gap/(cos(6*Po*t))))*cos(t)
The Y-axis coordinate determining function is
Y(t)＝(R2-(K1*gap/(cos(Po*t)))-(K2*gap/(cos(3*Po*t)))-(K3*gap/(cos(6*Po*t))))*sin(t)
Wherein X (t) is a convex abscissa function; y (t) is a convex ordinate function; r2 is the radius of the inner ring of the stator; gap is the single-side width of the air gap; po is the number of magnetic pole pairs of the rotor; k1 is in the range of 0.2-1; k2 is in the range of 0.1-0.5; k3 is in the range of 0.01-0.05.
3. The low back-emf harmonic water pump motor rotor core of claim 2, wherein: the K1 is 0.9, the K2 is 0.5, and the K3 is 0.02.
4. The low back-emf harmonic water pump motor rotor core of claim 1, wherein: the groove is a plane, and the plane is connected with two adjacent bulges.
5. The low back-emf harmonic water pump motor rotor core of claim 1, wherein: and a shaft hole is formed in the center of the rotor punching sheet.
6. The low back-emf harmonic water pump motor rotor core of claim 1, wherein: and lightening holes with the same number as the bulges are formed in the rotor punching sheet.
7. The low back-emf harmonic water pump motor rotor core of claim 6, wherein: the lightening holes surround the rotor punching sheet and are arranged close to the protrusions.
8. The low back-emf harmonic water pump motor rotor core of claim 1, wherein: and riveting points are arranged on the rotor punching sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220192824.3U CN216851475U (en) | 2022-01-24 | 2022-01-24 | Low back electromotive force harmonic water pump motor rotor core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220192824.3U CN216851475U (en) | 2022-01-24 | 2022-01-24 | Low back electromotive force harmonic water pump motor rotor core |
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| Publication Number | Publication Date |
|---|---|
| CN216851475U true CN216851475U (en) | 2022-06-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220192824.3U Active CN216851475U (en) | 2022-01-24 | 2022-01-24 | Low back electromotive force harmonic water pump motor rotor core |
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| Country | Link |
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| CN (1) | CN216851475U (en) |
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- 2022-01-24 CN CN202220192824.3U patent/CN216851475U/en active Active
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