Rotor module for a rotor of a rotary electric machine

Patent metadata

Field	Value
Publication number	US-12401241-B2
Application number	US-202218062749-A
Country	US
Kind code	B2
Filing date	Dec 7, 2022
Priority date	Dec 8, 2021
Publication date	Aug 26, 2025
Grant date	Aug 26, 2025

Abstract

A rotor module for a rotor of a rotary electric machine with an axis of rotation having a stator and a stator core including radially oriented stator teeth is disclosed. The rotor module has a rotor module core and permanent magnets defining a number of magnetic pole pairs, including a first pole and a second pole. The first and second poles of each magnetic pole pair are adjacent. The permanent magnets define first magnet arrangements defining each first pole and second magnet arrangements defining each second pole. A first angle between the first and second pole of each pair is equal to 360° divided by two times the number of magnetic pole pairs. A second angle between a second pole of a first pole pair and a first pole of a second pole pair is the sum of the first angle and a first shift angle.

First claim

The invention claimed is:

1. A rotor module for a rotor of a rotary electric machine with an axis of rotation comprising a stator comprising a stator core including radially oriented stator teeth, the rotor module comprising:
a rotor module core; and
a plurality of permanent magnets defining a number of magnetic pole pairs comprising a first pole and a second pole, the first pole and the second pole of each magnetic pole pair being adjacent,
the first poles being North poles and the second poles being South poles, or the first poles being South poles and the second poles being North poles,
the plurality of permanent magnets defining first magnet arrangements defining each first pole and second magnet arrangements defining each second pole,
the first magnet arrangements and the second magnet arrangements being distinct,
a first angle between the first pole and the second pole of each pairs is equal to 360° divided by two times the number of magnetic pole pairs, and
a second angle between a second pole of a first magnetic pole pair and a first pole of a second magnetic pole pair adjacent to the second pole of the first magnetic pole pair is equal to the sum of the first angle and a first shift angle, the first shift angle being greater than zero and less than or equal to a maximum shift angle, the maximum shift angle being equal to 360° divided by the number of stator teeth.

2. The rotor module according to claim 1 , wherein the first shift angle is between 45% and 55% of the first maximum shift angle.

3. The rotor module according to claim 1 , wherein a third angle between a second pole of the second magnetic pole pair and a first pole of a third magnetic pole pair adjacent to the second pole of the second magnetic pole pair is equal to the sum of the first angle and a second shift angle, the second shift angle being greater than zero and less than or equal to a maximum shift angle.

4. The rotor module according to claim 3 , wherein the second shift angle is between 45% and 55% of the maximum shift angle.

5. The rotor module according to claim 4 , wherein the second shift angle equals the first shift angle.

6. The rotor module according to claim 1 , further comprising: at least four magnetic pole pairs, and wherein the first magnetic pole pair and a fourth magnetic pole pair are symmetrical relative to the axis of rotation and the second magnetic pole pair and a fifth magnetic pole pair are symmetrical relative to the axis of rotation.

7. The rotor module according to claim 1 wherein the rotor module core includes a plurality of magnet pockets, the permanent magnets of the first magnet arrangements and the second magnet arrangements being disposed in the magnet pockets.

8. The rotor module according to claim 7 , wherein each first magnet arrangement and each second magnet arrangement includes two permanent magnets forming a V-shape.

9. The rotor module according to claim 7 , wherein each first magnet arrangement and each second magnet arrangement includes four permanent magnets forming a double V-shape, the double V-shape comprising a first V-shape and a second V-shape, a tip of the first V-shape and a tip of the second V-shape being aligned on a radial plane of the rotor module, the radial plane defining a direct axis of the pole.

10. The rotor module according to claim 7 , wherein each first magnet arrangement and each second magnet arrangement includes at least one permanent magnet tangentially embedded in each magnet pocket.

11. A rotary electric machine comprising a rotor according to claim 10 ; and a stator comprising a stator core including radially oriented stator teeth.

12. The rotary electric machine according to claim 11 , wherein the stator is radially outside the rotor.

13. A rotor for a rotary electric machine comprising a single rotor module according to claim 1 .

14. A rotor for a rotary electric machine comprising:
at least a first rotor module and a second rotor module, the first rotor module and the second rotor module being rotor modules according to claim 1 ,
wherein the first rotor module and the second rotor module are identical and include a first axial end face and a second axial end face opposite the first axial end face, and
wherein the second axial end face of the first rotor module faces the second axial end face of the second rotor module, the second axial end face of the first rotor module being in contact with the second axial end face of the second rotor module.

15. The rotor for rotary electric machine according to claim 14 , further comprising a third rotor module, the third rotor module and the first rotor module being identical, wherein the first axial end face of the third rotor module faces the first axial end face of the second rotor module, wherein the first axial end face of the third rotor module is in contact with the first axial end face of the second rotor module.

Assignees

• Valeo Eautomotive Germany Gmbh

Inventors

• Dotz Boris

Classifications

• H02K1/28

  Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures · CPC title

• H02K2201/06

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

• H02K29/03

  with a magnetic circuit specially adapted for avoiding torque ripples or self-starting problems · CPC title

• H02K2213/03

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

• H02K1/276 Primary

  Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] · CPC title