Asymmetrical skewed rotor

Patent metadata

Field	Value
Publication number	US-12051949-B2
Application number	US-202117151823-A
Country	US
Kind code	B2
Filing date	Jan 19, 2021
Priority date	Jan 19, 2021
Publication date	Jul 30, 2024
Grant date	Jul 30, 2024

Abstract

Asymmetric skewed rotors and an electric motor that incorporates said rotors. The rotor being are configured to rotate within a stator positioned to surround a portion of the rotors. The stator and rotors are aligned along a centerline (x). Each rotor includes an asymmetric feature, such that during operation dynamic balance results when the asymmetric feature on each rotor are aligned opposite one another perpendicular to the centerline (x) and static balance results when the asymmetric feature on each rotor are aligned opposite one another parallel to the centerline (x).

First claim

What is claimed is:

1. A motor having a rotating mechanism, the rotating mechanism comprising a stator that surrounds a portion of a plurality of rotors, the stator and rotors being aligned along a centerline (x);
wherein each rotor includes an asymmetric feature, the asymmetric feature being an orifice formed through the rotor and open on each end; the asymmetric feature in each rotor being substantially the same;
wherein the asymmetric feature on each rotor is aligned opposite one another perpendicular to the centerline (x), such that the plurality of rotors are in dynamic balance.

2. The motor according to claim 1 , wherein the motor is an alternating current (AC) motor.

3. The motor according to claim 2 , wherein the AC motor is a permanent magnet synchronous motor (PMSM).

4. The motor according to claim 3 , wherein the PMSM includes a plurality of permanent magnets arranged on the surface of the rotors or internally located within the body of the rotor.

5. The motor according to claim 4 , wherein each of the permanent magnets is independently selected as neodymium-iron-boron (Nd—Fe—B), samarium-cobalt (Sm—Co), aluminum-nickel-cobalt (alnico), or ferrites (barium and strontium).

6. The motor according to claim 1 , wherein each rotor comprises a lamination stamping comprising-one or more symmetric features in addition to the asymmetric feature.

7. The motor according to claim 6 , wherein the one or more symmetric features are orifices formed in the rotor;
wherein the orifice of the asymmetric feature is shaped differently than the orifice of the symmetric feature.

8. The motor according to claim 7 , wherein the orifices of the asymmetric and the symmetric features are shaped such that they are circular, oval, square, rectangular, triangular, rhombus, trapezoid, hexagon, octagon, or parallelogram.

9. The motor according to claim 7 , wherein the orifice of the asymmetric feature represents a portion of the orifice of the symmetric features.

10. A method of manufacturing the motor having the rotating mechanism according to claim 1 , the method comprising the steps of:
providing the plurality rotors, wherein the rotors comprise a laminated stamping that includes one or more symmetric features and the asymmetric feature; the asymmetric feature being aligned such that the plurality of rotors are in dynamic balance; and
assembling the plurality of rotors with the stator, such that the stator and rotors are aligned along the centerline (x) with the stator surrounding a portion of the rotors.

11. A plurality of rotors for use in a motor, the rotors configured to rotate within a stator positioned to surround a portion of the rotors, the stator and rotors being aligned along a centerline (x);
wherein each rotor includes an asymmetric feature, the asymmetric feature being an orifice formed through the rotor and open on each end; the asymmetric feature in each rotor being substantially the same;
wherein the asymmetric feature on each rotor is aligned opposite one another perpendicular to the centerline (x), such that the plurality of rotors are in dynamic balance.

12. The rotor according to claim 11 , wherein the motor is an alternating current (AC) motor.

13. The rotor according to claim 12 , wherein the AC motor is a permanent magnet synchronous motor (PMSM).

14. The rotor according to claim 13 , wherein the PMSM includes a plurality of permanent magnets arranged on the surface of the rotors or internally located within the body of the rotor.

15. The rotor according to claim 14 , wherein each of the permanent magnets is independently selected as neodymium-iron-boron (Nd—Fe—B), samarium-cobalt (Sm—Co), aluminum-nickel-cobalt (alnico), or ferrites (barium and strontium).

16. The rotor according to claim 11 , wherein each rotor comprises a lamination stamping comprising one or more symmetric features in addition to the asymmetric feature.

17. The rotor according to claim 16 , wherein the one or more symmetric features are orifices formed in the rotor;
wherein the orifice of the asymmetric feature is shaped differently than the orifice of the symmetric features.

18. The rotor according to claim 17 , wherein the orifices of the asymmetric and the symmetric features are shaped such that they are circular, oval, square, rectangular, triangular, rhombus, trapezoid, hexagon, octagon, or parallelogram.

19. The rotor according to claim 17 , wherein the orifice of the asymmetric feature represents a portion of the orifice of the symmetric features.

Assignees

• Mahle Int Gmbh

Inventors

• Bowman Brett
• Haseley Brent

Classifications

• H02K2201/06

  Magnetic cores, or permanent magnets characterised by their skew · CPC title

• H02K1/278

  Surface mounted magnets; Inset magnets · CPC title

• H02K1/02

  characterised by the magnetic material · CPC title

• F16F15/322

  the rotating body being a shaft (F16F15/34, F16F15/36 take precedence) · CPC title

• H02K2213/09

  Machines characterised by the presence of elements which are subject to variation, e.g. adjustable bearings, reconfigurable windings, variable pitch ventilators · CPC title