CN214013975U - Rotor core of permanent magnet synchronous motor - Google Patents
Rotor core of permanent magnet synchronous motor Download PDFInfo
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- CN214013975U CN214013975U CN202023084665.5U CN202023084665U CN214013975U CN 214013975 U CN214013975 U CN 214013975U CN 202023084665 U CN202023084665 U CN 202023084665U CN 214013975 U CN214013975 U CN 214013975U
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- rotor core
- magnetic steel
- permanent magnet
- motor
- magnet synchronous
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- Iron Core Of Rotating Electric Machines (AREA)
- Permanent Field Magnets Of Synchronous Machinery (AREA)
Abstract
The utility model discloses a PMSM rotor core belongs to motor technical field. The permanent magnet synchronous motor rotor core is provided with a plurality of trapezoidal magnetic steel grooves which are uniformly distributed along the circumferential direction, two bevel edges of each magnetic steel groove are provided with semicircular bulges, the center of the rotor core is provided with a petal-shaped center hole, an excircle consists of a plurality of sections of sinusoidal curves and straight lines, and every two sections of sinusoidal curves are connected by the straight lines. The semicircular bulge of the trapezoidal groove can clamp and fix the magnetic steel, and further, a gluing step can be omitted when the magnetic steel is installed, so that the production efficiency is improved, and meanwhile, the cost is also saved. The petal-shaped central hole reduces the influence of the dimensional tolerance of the motor shaft and the rotor core on the interference magnitude, further reduces the risk of deformation of the iron core in the press mounting process, and improves the consistency of products during the production of the motor.
Description
Technical Field
The utility model relates to a motor technology field, more specifically relates to a permanent magnet synchronous motor rotor core.
Background
The general rotor core of embedded permanent magnet synchronous motor has seted up the magnet steel groove, need insert the magnet steel and fix in the magnet steel groove during production, if the magnet steel is fixed insecure then can produce big, the big harmful consequences such as noise of vibration in the motor operation process. In order to facilitate installation, the prior art generally enables the magnetic steel groove and the magnetic steel to be in transition fit, a certain gap is formed between the magnetic steel and the magnetic steel groove, and in order to prevent the magnetic steel from loosening, glue is coated on the surface of the magnetic steel when the magnetic steel is required to be assembled, so that the production process is complicated.
The existing motor rotor core and a motor shaft are generally in interference fit, the motor shaft needs to be pressed into the rotor core during production, and the rotor core and the motor shaft cannot slide relatively when the motor rotates. Because the motor shaft and the rotor core have dimensional tolerance, the interference magnitude between the rotor core and the motor shaft is related to the dimensional tolerance, and meanwhile, the press-mounting force and the interference magnitude and the contact area of the iron core and the motor shaft are in a direct proportion relation when the motor shaft is pressed and mounted, the size tolerance of the motor shaft and the rotor core can influence the press-mounting force when the motor shaft is pressed into the rotor, especially when the rotor core is longer, the size tolerance has great influence on the press-mounting force of the motor shaft, the rotor core can be deformed due to overlarge press-mounting force, and further, the product consistency is poor and the unqualified rate is high when the motor is.
Disclosure of Invention
The utility model adopts the following technical scheme: the utility model provides a PMSM rotor core, rotor core is last to have a plurality of trapezoidal magnetism steel grooves along circumferencial direction evenly distributed, two hypotenuses in magnetism steel groove have semi-circular arch, rotor core center has petal shape centre bore, petal shape centre bore comprises a circular macropore and a plurality of semi-circular aperture, the centre of a circle of macropore does PMSM rotor core's center, the centre of a circle of semi-circular aperture is followed macropore circumference evenly distributed.
Furthermore, the excircle of the rotor core is composed of a plurality of sections of sinusoidal curves and straight lines, and each two sections of sinusoidal curves are connected by the straight lines.
Further, the number of the trapezoidal magnetic steel slots is equal to that of the sinusoidal curves and the straight lines, and is equal to that of the poles of the motor.
Furthermore, the semicircular bulge of the trapezoidal groove is in interference fit with the magnetic steel, so that the magnetic steel can be clamped and fixed, a gluing step can be omitted when the magnetic steel is installed, the production efficiency is improved, and meanwhile, the cost is saved.
According to the utility model discloses PMSM rotor core, the area of contact of semi-circular arch and magnet steel is less, consequently can not damage the magnet steel because the pressure equipment power is too big when the assembly magnet steel.
According to the utility model discloses permanent magnet synchronous motor rotor core, the circular macropore and the contact of motor shaft excircle of petal shape centre bore, because semi-circular aperture and motor shaft excircle contactless, consequently, the area of contact of rotor core centre bore and motor shaft has been reduced, need strengthen the magnitude of interference of circular macropore and motor shaft under the unchangeable condition of assurance pressure equipment power, consequently, the influence of motor shaft and rotor core dimensional tolerance to the magnitude of interference has been reduced, and then the influence of dimensional tolerance to pressure equipment power has been reduced, and then the risk that the iron core warp has been reduced, product uniformity when having improved motor production, product quality has been improved.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Reference numerals: 01 is a magnetic steel groove; 02 is a semicircular bulge; 03 is a round big hole; 04 is a semicircular small hole; 05 is a straight line; 06 is a sine curve, 07 is a petal-shaped central hole.
Detailed Description
As shown in figure 1, the excircle of the rotor core of the utility model consists of a plurality of sections of sinusoidal curves 06 and a plurality of sections of straight lines 05, and every two sections of sinusoidal curves 06 are connected by the straight lines 05.
As shown in fig. 1, the utility model discloses rotor core has a plurality of trapezoidal magnetic steel grooves 01, magnetic steel groove 01 is along circumference evenly distributed, magnetic steel groove 01 quantity equals the rotor number of poles.
As shown in fig. 1, the magnetic steel slot 01 is trapezoidal, the lower bottom of the trapezoid is close to the outer circle of the rotor core, the upper bottom of the trapezoid is close to the petal-shaped center hole 07 of the rotor core, the two oblique edges of the magnetic steel slot 01 are respectively provided with a semicircular bulge 02, the linear distance between the semicircular bulges 02 is slightly smaller than the width of the magnetic steel, so that the magnetic steel and the magnetic steel slot 01 are in interference fit, and further the magnetic steel cannot move after being assembled.
As shown in fig. 1, a petal-shaped central hole 07 is formed in the center of the rotor core, the petal-shaped central hole 07 is composed of a circular large hole 03 and a plurality of semicircular small holes 04, the circle center of the large hole 04 is the center of the rotor core of the permanent magnet synchronous motor, and the circle centers of the semicircular small holes 04 are uniformly distributed along the circumference of the large hole 04.
According to the utility model discloses permanent magnet synchronous motor rotor core, semi-circular protrusion 02 on trapezoidal magnet steel groove 01 can press from both sides the magnet steel tight, consequently can press from both sides the magnet steel tight fixed, and is further, can save the rubber coating step when the installation magnet steel, has improved production efficiency and has also saved the cost simultaneously.
According to the utility model discloses PMSM rotor core, the area of contact of semi-circular arch 02 and magnet steel is less, consequently can not damage the magnet steel because the pressure equipment power is too big when the assembly magnet steel.
According to the utility model discloses permanent magnet synchronous motor rotor core, petal shape centre bore 07's circular macropore 03 and motor shaft excircle contact, because semi-circular aperture 04 and motor shaft excircle contactless, consequently, the area of contact of rotor core centre bore and motor shaft has been reduced, need increase the magnitude of interference of circular macropore 03 and motor shaft under the unchangeable condition of assurance pressure equipment power, consequently, the influence of motor shaft and rotor core dimensional tolerance to the magnitude of interference has been reduced, and then the influence of dimensional tolerance to pressure equipment power has been reduced, furthermore, the risk that the iron core warp has been reduced, product uniformity when having improved motor production, product quality is improved.
Claims (3)
1. The utility model provides a PMSM rotor core which characterized in that: the permanent magnet synchronous motor rotor core is provided with a plurality of trapezoidal magnetic steel grooves which are uniformly distributed along the circumferential direction, two bevel edges of the magnetic steel grooves are provided with semicircular bulges, the center of the rotor core is provided with a petal-shaped center hole, the petal-shaped center hole is composed of a circular large hole and a plurality of semicircular small holes, the center of the circular large hole is the center of the permanent magnet synchronous motor rotor core, and the centers of the semicircular small holes are distributed along the circumference of the large hole.
2. The rotor core of permanent magnet synchronous motor according to claim 1, wherein the outer circle of the rotor core is composed of a plurality of segments of sine curves and straight lines, and each two segments of the sine curves are connected by the straight lines.
3. The PMSM rotor core according to claim 2, wherein the number of trapezoidal magnet steel slots is equal to the number of sinusoidal and straight lines and equal to the number of motor poles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023084665.5U CN214013975U (en) | 2020-12-21 | 2020-12-21 | Rotor core of permanent magnet synchronous motor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023084665.5U CN214013975U (en) | 2020-12-21 | 2020-12-21 | Rotor core of permanent magnet synchronous motor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214013975U true CN214013975U (en) | 2021-08-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202023084665.5U Active CN214013975U (en) | 2020-12-21 | 2020-12-21 | Rotor core of permanent magnet synchronous motor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214013975U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116169808A (en) * | 2023-04-26 | 2023-05-26 | 四川芯智热控技术有限公司 | Motor magnet fixing structure and motor magnet fixing method |
-
2020
- 2020-12-21 CN CN202023084665.5U patent/CN214013975U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116169808A (en) * | 2023-04-26 | 2023-05-26 | 四川芯智热控技术有限公司 | Motor magnet fixing structure and motor magnet fixing method |
| CN116169808B (en) * | 2023-04-26 | 2023-07-04 | 四川芯智热控技术有限公司 | Motor magnet fixing structure and motor magnet fixing method |
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