Rotor for a permanent magnet synchronous machine, pole gap rod for such a rotor, and method for producing such a rotor

Patent metadata

Field	Value
Publication number	US-11075554-B2
Application number	US-201616075502-A
Country	US
Kind code	B2
Filing date	Nov 10, 2016
Priority date	Feb 4, 2016
Publication date	Jul 27, 2021
Grant date	Jul 27, 2021

Abstract

The invention relates to a rotor ( 2 ) for a permanent magnet synchronous machine, comprising a laminated core ( 6 ) arranged on a shaft ( 4 ) extending in the axial direction (A), a plurality of poles ( 14 ) being arranged around the periphery of the laminated core, wherein at least one magnet ( 10 ) is provided per pole. In order to ensure particularly good prevention against slipping of the magnets, pole gap rods ( 12 ) are positioned between the poles ( 14 ) in such a way that, in the peripheral direction, each magnet ( 10 ) is applied, by a first side ( 16 a ) and an opposing second side ( 16 b ), to a respective pole gap rod ( 12 ).

First claim

What is claimed is:

1. A rotor for a permanent magnet-excited synchronous machine, said rotor comprising:
a shaft extending in an axial direction;
a laminated core arranged on the shaft;
a plurality of poles arranged around a periphery of the laminated core, with at least one magnet being provided per pole;
pole gap rods positioned between the poles such that, when viewed in a peripheral direction, each magnet rests with a first side and an opposing second side on an associated one of the pole gap rods, said pole gap rods including at least two continuous segments which are arranged in the axial direction and offset with respect to one another in the peripheral direction, thereby enabling a staggered arrangements of the poles when viewed in the axial direction.

2. The rotor of claim 1 , wherein each segment of the pole gap rods is at least as long as an associated pole.

3. The rotor of claim 1 , wherein the pole gap rods are made of a magnetically non-conducting material.

4. The rotor of claim 1 , wherein the pole gap rods are fixed to the laminated core.

5. The rotor of claim 1 , wherein the pole gap rods include pins which are directed radially inward and engage in pole gaps between the poles.

6. The rotor of claim 1 , wherein the pole gap rods have full surface contact with the first and the second side of the magnets.

7. The rotor of claim 1 , wherein the pole gap rods include a plurality of webs, which extend at a right angle to the axial direction, for contact of the pole gap rods with the magnets.

8. The rotor of claim 1 , wherein the magnet is embodied as a segment magnet.

9. The rotor of claim 1 , further comprising an adhesive tape applied to the laminated core below the magnets.

10. The rotor of claim 1 , wherein an arrangement of the magnets and the pole gap rods is bound.

11. The rotor of claim 1 , wherein the pole gap rods have a plurality of clearances which open radially outward.

12. A pole gap rod for a rotor of a permanent magnet-excited synchronous machine having a plurality of poles arranged around a periphery of a laminated core, with at least one magnet being provided per pole, said pole gap rod comprising at least two continuous segments which are arranged in an axial direction of the rotor and offset with respect to one another in a peripheral direction of the rotor, thereby enabling a staggered arrangement of the poles disposed between peripherally adjacent pole gap rods when viewed in the axial direction.

13. The pole gap rod of claim 12 , wherein the pole gap rod has an axial length which is at least as long as an axial length of a pole disposed on the periphery of the laminated core of the rotor.

14. The pole gap rod of claim 12 , wherein the pole gap rod is made of a magnetically non-conducting material.

15. The pole gap rod of claim 12 , further comprising pins which are directed radially inward and engage in pole gaps between poles arranged around the periphery of the laminated core of the rotor.

16. The pole gap rod of claim 12 , further comprising a plurality of webs, which extend at a right angle to the axial direction, for contact of the pole gap rods with magnets arranged around the periphery of laminated core of the rotor.

17. The pole gap rod of claim 12 , wherein the pole gap rod has a plurality of clearances which open radially outward.

18. A method for producing a rotor, comprising:
joining a laminated core to a shaft extending in an axial direction;
applying an adhesive tape around periphery of the laminated core for prefixing magnets on the laminated core,
arranging pole gap rods and magnets around the periphery of the laminated core, wherein the pole gap rods are positioned between the magnets such that, when viewed in a peripheral direction, each magnet rests with a first side and an opposing second side on peripherally adjacent ones of the pole gap rods, said pole gap rods including at least two continuous segments which extend in the axial direction and are offset with respect to one another in the peripheral direction; and
bounding the arrangement of the magnets and the pole gap rods.

Assignees

• Siemens Ag

Inventors

• Angler Daniel
• Bzdziuch Michael
• Eckert Rainer
• Kraus Andreas
• Seufert Jürgen

Classifications

• H02K1/278 Primary

  Surface mounted magnets; Inset magnets · CPC title

• H02K2201/06

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