CN217508376U - EPS motor rotor core - Google Patents
EPS motor rotor core Download PDFInfo
- Publication number
- CN217508376U CN217508376U CN202221389981.XU CN202221389981U CN217508376U CN 217508376 U CN217508376 U CN 217508376U CN 202221389981 U CN202221389981 U CN 202221389981U CN 217508376 U CN217508376 U CN 217508376U
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- rotor core
- magnet steel
- motor
- piece
- heavy hole
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- Permanent Field Magnets Of Synchronous Machinery (AREA)
- Iron Core Of Rotating Electric Machines (AREA)
Abstract
The utility model relates to a motor rotor iron core structure for EPS belongs to motor technical field. The rotor core punching sheet is characterized by comprising a rotor core punching sheet, and a plurality of rotor core punching sheets are laminated to form the rotor core. Rotor core towards the piece be equipped with along the heavy hole that goes that circumference distributes, rotor core towards the piece outer fringe is equipped with the magnet steel fixed slot, it is the symmetric distribution to go heavy hole, and every goes heavy hole to be equipped with the oblique utmost point guide way, be the magnet steel stationary plane between two adjacent magnet steel fixed slots, magnet steel stationary plane bottom is circular structure. The utility model discloses motor inertia is low, the quality is light, improved motor response speed, and the oblique utmost point mode reliability is high, has reduced the tooth's socket torque and has improved the NVH performance.
Description
Technical Field
The utility model relates to a EPS electric motor rotor core belongs to motor technical field.
Background
At present, the motor for EPS mainly comprises a permanent magnet brush motor, a permanent magnet brushless motor, a permanent magnet asynchronous motor and the like, and the EPS system requires the requirements of large motor output torque, small torque fluctuation, high response speed and the like, so the permanent magnet brushless motor becomes a mainstream product. However, in the existing EPS permanent magnet brushless motor, a surface-mounted magnetic pole structure is mostly adopted, the fixing mode of magnetic steel becomes one of difficulties, and the rotor direct pole structure causes large cogging torque output by the motor and poor NVH performance.
Disclosure of Invention
The utility model provides a rotor core structure that simple structure, utmost point is reliable to one side, inertia is low for solving above-mentioned problem.
In order to achieve the above object, the utility model provides a EPS brushless motor rotor core structure, including rotor core towards the piece, a plurality of rotor core towards the piece and fold the rotor core that presses and form. The rotor core punching sheet is provided with a weight removing hole, the outer edge of the rotor core punching sheet is provided with magnetic steel fixing grooves, the weight removing holes are symmetrically distributed, each weight removing hole is provided with an oblique pole guide groove, and a magnetic steel fixing surface is arranged between every two adjacent magnetic steel fixing grooves.
Further, the weight-reducing holes are uniformly distributed along the circumferential direction.
Further, each of the weight-removing holes comprises three oblique polar guide grooves.
Further, magnet steel fixed slot bottom is circular to the magnet steel fixed slot with go heavy hole quantity equal, equal to the motor pole number.
Furthermore, the oblique pole guide grooves are symmetrically distributed at an interval angle alpha.
The utility model discloses a rotor core structure, stator core is equipped with the weight-removing hole and reduces the motor quality, improves motor response speed, the motor slant pole angle is guaranteed to the slant pole guide way, improves the slant pole reliability, reduces tooth's socket torque and improves the NVH performance, and magnet steel constant head tank bottom is circular optimization magnetic line of force trend, and then improves motor operating performance.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic diagram of the oblique pole structure of the present invention.
Reference numerals: 1 is a rotor iron core punching sheet; 2 is a weight-removing hole; 3 is a magnetic steel fixing groove; 4 is a slant guide groove; 5 is a reinforcing rib; 6 is a magnetic steel fixing surface; 7 is a shaft hole.
Detailed Description
As shown in fig. 1, the utility model discloses rotor core is folded towards piece 1 by a plurality of rotor core and is pressed and form, and rotor core towards piece 1 and is equipped with heavy hole 2, goes heavy hole 2 and is close to rotor core towards the outer fringe of piece 1, and the position that is close to magnet steel stationary plane 5 is triangle-shaped.
As shown in figure 1, the weight-removing holes 2 are symmetrically distributed along the circumferential direction, the number of the weight-removing holes is equal to the number of poles of the motor, and the reinforcing ribs 5 are arranged between every two adjacent weight-removing holes 2, so that the mechanical strength of the rotor core can be guaranteed.
As shown in fig. 1, the weight-removing holes 2 are provided with oblique pole guide grooves 4 near the shaft hole 7, each weight-removing hole 2 is provided with 3 oblique pole guide grooves 4, each oblique pole guide groove 4 is arc-shaped, the central line of the middle oblique pole guide groove coincides with the perpendicular bisector of the magnetic steel fixing surface, and the central lines of the oblique pole guide grooves on both sides are respectively shifted by alpha degrees from left to right, so that reliable positioning of 2 sections or 3 sections of oblique poles of the rotor core is realized, and the cogging torque of the motor is further improved.
As shown in fig. 1, the magnetic steel fixing groove 3 is arranged on the rotor core punching sheet 1, the magnetic steel fixing groove 3 radially extends to the inside of the rotor core punching sheet 1, the bottom of the magnetic steel fixing groove 3 is circular, the circular structure optimizes the trend of magnetic force lines, and the local flux density saturation risk of the rotor punching sheet 1 is reduced.
As shown in fig. 1, the magnetic steel fixing groove 3 is filled with a non-magnetic conductive material and is integrated with the rotor core punching sheet 1 through injection molding, so that mechanical assembly of magnetic steel can be realized, and the risk of manual misoperation is reduced.
As shown in FIG. 2, the rotor realizes two sections of oblique poles through the oblique pole guide groove 4, and the realization method is simple and reliable.
According to the utility model discloses rotor core, through utmost point guide way 4 realizes the rotor utmost point to one side, and product uniformity has improved product quality when having improved motor production.
Claims (4)
1. An EPS motor rotor core which is characterized in that: EPS motor rotor core includes the rotor core towards the piece, a plurality of rotor core towards the piece and fold the rotor core that forms, rotor core towards the piece has along the heavy hole that goes that circumference distributes, rotor core towards piece outer fringe and is equipped with the magnet steel fixed slot, it is the symmetric distribution to go heavy hole, and every goes heavy hole to be equipped with oblique utmost point guide way, be the magnet steel stationary plane between the adjacent magnet steel fixed slot, magnet steel fixed slot bottom is circular structure.
2. The EPS motor rotor core of claim 1, wherein the weight-removing hole has three oblique guide slots, and the offset angles of the oblique guide slots on both sides are alpha degrees.
3. The EPS motor rotor core of claim 1, wherein the reinforcing ribs are disposed between two adjacent weight-removing holes, the number of weight-removing holes is equal to the number of poles of the motor, and the number of magnetic steel fixing slots is equal to the number of poles of the motor.
4. The rotor core of EPS motor of claim 1, characterized in that the magnet steel fixing slots are filled with non-magnetic conductive material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221389981.XU CN217508376U (en) | 2022-06-06 | 2022-06-06 | EPS motor rotor core |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221389981.XU CN217508376U (en) | 2022-06-06 | 2022-06-06 | EPS motor rotor core |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217508376U true CN217508376U (en) | 2022-09-27 |
Family
ID=83357316
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221389981.XU Active CN217508376U (en) | 2022-06-06 | 2022-06-06 | EPS motor rotor core |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217508376U (en) |
-
2022
- 2022-06-06 CN CN202221389981.XU patent/CN217508376U/en active Active
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