Electric motor with turnable rotor segments for reducing the magnetic flux

Patent metadata

Field	Value
Publication number	US-11233429-B2
Application number	US-201816607596-A
Country	US
Kind code	B2
Filing date	Mar 23, 2018
Priority date	Apr 24, 2017
Publication date	Jan 25, 2022
Grant date	Jan 25, 2022

Abstract

The electrical motor includes a stator and a rotor configured to be rotated about an axis wherein the rotor includes at least three rotor subsegments, wherein a first and second rotor subsegment can be turned relative to one another about the axis in response to a rotation speed range being above a predetermined threshold value of a rotation speed of the electrical machine.

First claim

The invention claimed is:

1. An electrical machine comprising:
a stator comprising a plurality of flux guides;
a rotor which can be rotated about an axis;
the rotor comprising three rotor subsegments, wherein at least two rotor subsegments of which can be turned relative to one another about the axis; and
wherein the at least two rotor subsegments can be turned relative to one another about the axis;
wherein after a predetermined threshold value for a rotation speed of the electrical machine is exceeded, a first magnetic pole arrangement comprising a first pole of a first rotor subsegment, is disposed opposite to a second magnetic pole arrangement of a second rotor subsegment comprising a second pole;
and wherein the at least three rotor subsegments each comprise a pair of magnetic bodies; wherein the pair of magnetic bodies are inclined with respect to a radial direction of the rotor.

2. The electrical machine of claim 1 ,
wherein the first and second magnetic pole arrangements alternate in a circumferential direction of the rotor.

3. The electrical machine of claim 2 ,
wherein each magnetic body form a V-shaped arrangement.

4. The electrical machine of claim 3 ,
wherein at least one of the magnetic bodies forms an angle of between +/−10 to +/−60 degrees with radial direction of the rotor.

5. The electrical machine of claim 1 ,
wherein magnetic flux is suppressed in a direction through the stator.

6. The electrical machine of claim 5 ,
wherein the at least two rotor subsegments which can be turned relative to one another have an identical width.

7. The electrical machine of claim 1 ,
wherein a turning device carries out the relative turning of the at least two rotor subsegments which can be turned relative to one another in predetermined steps or continuously.

8. An electrical machine having:
a stator comprising a plurality of teeth; and
a rotor configured to be rotated about an axis wherein the rotor includes at least three rotor subsegments, wherein a first and second rotor subsegment can be turned relative to one another about the axis relative to one another in a rotation speed range above a predetermined threshold value of a rotation speed of the electrical machine in a manner that a magnetic effect of the first and second rotor subsegment cancel each other out;
wherein the at least three rotor subsegments each comprise a pair of magnetic bodies; and wherein the pair of magnetic bodies are inclined with respect to a radial direction of the rotor.

9. The electrical machine of claim 8 , wherein the rotor includes a third rotor subsegment that determines an overall effect of the electrical machine.

10. The electrical machine of claim 8 , wherein a third rotor subsegment includes a third magnetic pole arrangement that includes a first and second pole.

11. The electrical machine of claim 8 , wherein the first and second rotor subsegments each have a first magnetic pole arrangement with a first pole and a second magnetic pole arrangement with a second pole, wherein the first and second magnetic pole arrangements alternate in a circumferential direction of the rotor.

12. The electrical machine of claim 8 , wherein the first and second rotor subsegments include magnetic bodies form a V-shaped arrangement in the rotor.

13. An electrical motor comprising:
a stator comprising a variety of teeth; and
a rotor configured to be rotated about an axis wherein the rotor includes at least three rotor subsegments, wherein a first and second rotor subsegment can be turned relative to one another about the axis in response to a rotation speed range being above a predetermined threshold value of a rotation speed of the electrical motor;
wherein the electrical motor includes a first magnetic pole arrangement of the first rotor subsegment situated opposite a second magnetic pole arrangement of the second rotor subsegment in a direction of the axis, wherein the first magnetic pole arrangement has a first pole and the second magnetic pole arrangement has a second pole;
and wherein each of the at least three rotor subsegments comprise a pair of magnetic bodies that are inclined with respect to a radial direction of the rotor.

14. The electrical motor of claim 13 , wherein the first and second rotor subsegments are configured to turn relative to one another to cancel a magnetic force of each rotor subsegment out and a magnetic effect of the electrical motor.

Assignees

• Schaeffler Technologies Ag

Inventors

• Engler Miriam
• Schwanemann Peter
• Gramann Matthias
• Reik Wolfgang
• Angrick Carsten

Classifications

• H02K1/2766 Primary

  having a flux concentration effect · CPC title

• H02K21/029 Primary

  Vectorial combination of the fluxes generated by a plurality of field sections or of the voltages induced in a plurality of armature sections · 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

• H02K2213/03

  Machines characterised by numerical values, ranges, mathematical expressions or similar information · CPC title

• H02K7/04

  Balancing means · CPC title