CN209434982U - A kind of EPS brushless electric motor rotor core structure - Google Patents
A kind of EPS brushless electric motor rotor core structure Download PDFInfo
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- CN209434982U CN209434982U CN201821640593.8U CN201821640593U CN209434982U CN 209434982 U CN209434982 U CN 209434982U CN 201821640593 U CN201821640593 U CN 201821640593U CN 209434982 U CN209434982 U CN 209434982U
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- axis hole
- mounting surface
- magnet steel
- electric motor
- rotor core
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- 238000004080 punching Methods 0.000 claims abstract description 18
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 15
- 239000010959 steel Substances 0.000 claims abstract description 15
- 238000004806 packaging method and process Methods 0.000 claims abstract description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical group [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 2
- 238000010586 diagram Methods 0.000 description 5
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- Iron Core Of Rotating Electric Machines (AREA)
Abstract
EPS brushless electric motor rotor core structure designed by the utility model, including rotor punching, multiple rotor punchings laminate into rotor core, there is axis hole in rotor punching geometric center, the edge of rotor punching is equipped with several plastic packaging slots, it is magnet steel mounting surface between the two neighboring plastic packaging slot, several additional holes are equipped between the magnet steel mounting surface and axis hole, the shortest distance of the geometric center of the additional holes to axis hole is L1, the shortest distance of magnet steel mounting surface and axis hole is L2, and L1/L2 is less than or equal to 0.5.The utility model rotary inertia is low, light weight.
Description
Technical field
The utility model relates to field of motor manufacturing, especially a kind of EPS brushless electric motor rotor core structure.
Background technique
Currently, being quick response and light weight under the premise of guaranteeing output characteristics with an important indicator of EPS system
Change, quick response is exactly to require configured motor rotary inertia low, and lightweight is that the material for requiring motor to use reduces to the greatest extent.
This is in conventional design of electrical motor, and rotary inertia is low and lightweight is a pair of contradictory body, proposes higher want to EPS brushless motor
It asks, and in EPS motor used at present, only consider taking mutually after the satisfaction of one index or the two are taken into account
House.
Summary of the invention
There is provided that a kind of rotary inertia is low, quality purpose of the utility model is to solve above-mentioned the deficiencies in the prior art
A kind of light EPS brushless electric motor rotor core structure.
To achieve the goals above, EPS brushless electric motor rotor core structure designed by the utility model, including rotor punching
Piece, multiple rotor punchings laminate into rotor core, have axis hole in rotor punching geometric center, if the edge of rotor punching is equipped with
A plastic packaging slot is done, is magnet steel mounting surface between the two neighboring plastic packaging slot, if being equipped between the magnet steel mounting surface and axis hole
The shortest distance of dry additional holes, geometric center to the axis hole of the additional holes is L1, the most short distance of magnet steel mounting surface and axis hole
From for L2, and L1/L2 is less than or equal to 0.5.
The quantity of the additional holes, magnet steel mounting surface and plastic packaging slot is equal.
The additional holes are triangle or circle.
A kind of EPS brushless electric motor rotor core structure that the utility model obtains can mitigate electricity by the way that additional holes are arranged
Machine weight makes EPS system lightweight, while reducing motor cost；The rotary inertia of motor can also be reduced, EPS system is reduced
Response time and can optimize the magnetic line of force trend, reduce back-emf harmonic content, improve motor torque performance.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model;
Fig. 2 is 1 rotor punching structure schematic diagram of the embodiments of the present invention；
Fig. 3 is 2 rotor punching structure schematic diagram of the embodiments of the present invention.
Specific embodiment
Utility model creation is described further below with reference to embodiment.
As shown in Figure 1, 2, 3, a kind of EPS brushless electric motor rotor core structure provided in this embodiment, including rotor punching
1, multiple rotor punchings 1 laminate into rotor core, it is characterised in that: have axis hole 1-1, rotor in 1 geometric center of rotor punching
The edge of punching 1 is equipped with several plastic packaging slots 1-2, is magnet steel mounting surface 1-3 between the two neighboring plastic packaging slot 1-2, described
Several additional holes 1-4, the geometric center of the additional holes 1-4 to axis hole 1- are equipped between magnet steel mounting surface 1-3 and axis hole 1-1
1 shortest distance is that the shortest distance of L1, magnet steel mounting surface 1-3 and axis hole 1-1 are L2, and L1/L2 is less than or equal to 0.5.
The quantity of the additional holes 1-4, magnet steel mounting surface 1-3 and plastic packaging slot 1-2 are equal.
The additional holes 1-4 is triangle or circle.
The 1st kind of embodiment of the utility model, uses L2 for 8.54mm, L1 equal 3.75mm, and L1/L2 0.44 is less than
0.5.Under rated operation point 1100rpm revolving speed, the output torque of traditional design and embodiment 1 is all 4.91N.m.Traditional design
The quality of EPS brushless electric motor rotor iron core is 66.25g, and rotary inertia 384672669.8g*mm2,1 EPS of embodiment is brushless
The quality of motor rotor core is 59.44g, and rotary inertia 345125863g*mm2,5 subharmonic content of back-emf is than tradition
It designs low.Magnetic line of force trend is optimized after opening up additional holes.
2nd embodiment of the utility model, uses L2 for 8.54mm, L1 equal 3.75mm, L1/L2 0.44, small
In 0.5.Under rated operation point 1100rpm revolving speed, the output torque of traditional design and embodiment 2 is all 4.91N.m.EPS without
The quality of brush motor rotor core is 52.27g, rotary inertia 303507392.6g*mm2,5 subharmonic content ratio of back-emf
Traditional design is low.Magnetic line of force trend is optimized after opening up additional holes.
2 rated point torque characteristics comparison diagram of 1 the utility model traditional design of table, embodiment 1 and embodiment
5 subharmonic comparison diagram of 2 the utility model traditional design of table, embodiment 1 and 2 back-emf of embodiment
As shown in upper figure, the utility model embodiment is set compared to documents, 5 subharmonic content of back-emf than tradition
Meter wants low；Magnetic line of force trend is optimized after opening up additional holes, improves motor torque performance.
The basic principles and main features of the present invention and the advantages of the present invention have been shown and described above, for
For those skilled in the art, it is clear that the present invention is not limited to the details of the above exemplary embodiments, and without departing substantially from this
In the case where the spirit or essential attributes of utility model, the utility model can be realized in other specific forms.Therefore, no matter
From the point of view of which point, the present embodiments are to be considered as illustrative and not restrictive, and the scope of the utility model is by institute
Attached claim rather than above description limit, it is intended that will fall within the meaning and scope of the equivalent elements of the claims
All changes are embraced therein.It should not treat any reference in the claims as limiting related right
It is required that.
While there has been shown and described that the embodiments of the present invention, for the ordinary skill in the art,
It is understood that these embodiments can be carried out with a variety of variations in the case where not departing from the principles of the present invention and spirit, repaired
Change, replacement and variant, the scope of the utility model is defined by the appended claims and the equivalents thereof.
Claims (3)
1. a kind of EPS brushless electric motor rotor core structure, including rotor punching (1), multiple rotor punchings (1) laminate into rotor iron
Core, it is characterised in that: there is axis hole (1-1) in rotor punching (1) geometric center, the edge of rotor punching (1) is equipped with several
Plastic packaging slot (1-2) is magnet steel mounting surface (1-3), the magnet steel mounting surface (1-3) between the two neighboring plastic packaging slot (1-2)
Between axis hole (1-1) be equipped with several additional holes (1-4), the geometric center of the additional holes (1-4) to axis hole (1-1) most
Short distance is L1, and the shortest distance of magnet steel mounting surface (1-3) and axis hole (1-1) are L2, and L1/L2 is less than or equal to 0.5.
2. a kind of EPS brushless electric motor rotor core structure according to claim 1, which is characterized in that the additional holes
The quantity of (1-4), magnet steel mounting surface (1-3) and plastic packaging slot (1-2) are equal.
3. a kind of EPS brushless electric motor rotor core structure according to claim 1, which is characterized in that the additional holes
(1-4) is triangle or circle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821640593.8U CN209434982U (en) | 2018-10-10 | 2018-10-10 | A kind of EPS brushless electric motor rotor core structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821640593.8U CN209434982U (en) | 2018-10-10 | 2018-10-10 | A kind of EPS brushless electric motor rotor core structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209434982U true CN209434982U (en) | 2019-09-24 |
Family
ID=67967203
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821640593.8U Active CN209434982U (en) | 2018-10-10 | 2018-10-10 | A kind of EPS brushless electric motor rotor core structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209434982U (en) |
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2018
- 2018-10-10 CN CN201821640593.8U patent/CN209434982U/en active Active
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP03 | Change of name, title or address |
Address after: No. 266, Fumin Road, Lucheng Street, Wujin District, Changzhou City, Jiangsu Province, 213000 Patentee after: Nedco Kaiyu Automotive Appliances (Jiangsu) Co.,Ltd. Address before: No. 156 Dongfang East Road, Economic Development Zone, Changzhou City, Jiangsu Province, 213000 Patentee before: NIDEC KAIYU AUTO ELECTRIC (JIANGSU) Co.,Ltd. |
|
| CP03 | Change of name, title or address |