Rotor for an electric machine

Patent metadata

Field	Value
Publication number	US-9343936-B2
Application number	US-201214001830-A
Country	US
Kind code	B2
Filing date	Feb 21, 2012
Priority date	Feb 28, 2011
Publication date	May 17, 2016
Grant date	May 17, 2016

Abstract

A rotor for an electric machine has a rotor member extending circumferentially about the axis of rotation of the rotor, and a locking device in an axial end region of a guide to mount permanent magnets in the direction of the axis of rotation of the rotor. The locking device is retained on the rotor member in the radial direction and in the direction of rotation of the rotor by guides. The locking device has a movable movement element and is designed such that when the movement element is moved, the locking device is positively or non-positively connected to the rotor member.

First claim

The invention claimed is:

1. A rotor for an electric machine, comprising:
a rotor body configured for rotation about an axis and having recesses extending in a direction of the axis and forming guides;
permanent magnets held by the guides on the rotor body in a radial direction and in a direction of rotation of the rotor body; and
a plurality of locking fixtures arranged at an axial end region of the guides in one-to-one correspondence and held by the guides on the rotor body in the radial direction and in the direction of rotation, each said locking fixture having a movable moving element which when moved causes the locking fixture to connect with the rotor body by a positive fit or interference fit.

2. The rotor of claim 1 , wherein the movable moving element is constructed as a rotatable rotary element which when rotated causes the locking fixture to connect with the rotor body by the positive fit or interference fit.

3. The rotor of claim 2 , wherein the rotary element is constructed as a screw or bolt.

4. The rotor of claim 1 , wherein the rotor body has in the axial end region of each of the guides an opening which runs in the radial direction, each said locking fixture having an interlocking element which is moved into the opening as the moving element is moved to thereby implement the positive fit.

5. The rotor of claim 4 , wherein the locking fixtures have each a displacement element of wedge-shaped configuration, said moving element being constructed as a rotatable rotary element which when rotated causes the displacement element to move in an axial direction of the rotary element against the interlocking element so as to move the interlocking element into the opening.

6. The rotor of claim 1 , wherein the locking fixtures have each a first basic element and a second basic element so constructed that a movement of the moving element causes the first and second basic elements to be pressed against the guide to establish the interference fit.

7. The rotor of claim 6 , wherein the second basic element has an angled side face in mechanical contact with the first basic element, said moving element being constructed as a rotatable rotary element which when rotated displaces the second basic element in an axial direction of the rotary element and presses the second basic element against the first basic element, thereby moving the first and second basic elements in opposite directions to each other in the direction of rotation of the rotor and pressing the first and second basic elements against the guide.

8. An electric machine, constructed as an electric motor or generator, said electric machine comprising a rotor including a rotor body configured for rotation about an axis and having recesses extending in a direction of the axis and forming guides, permanent magnets held by the guides on the rotor body in a radial direction and in a direction of rotation of the rotor body, and a plurality of locking fixtures arranged at an axial end region of the guides in one-to-one correspondence and held by the guides on the rotor body in the radial direction and in the direction of rotation, each said locking fixture having a movable moving element which when moved causes the locking fixture to connect with the rotor body by a positive fit or interference fit.

9. The electric machine of claim 8 , wherein the movable moving element is constructed as a rotatable rotary element which when rotated causes the locking fixture to connect with the rotor body by the positive fit or interference fit.

10. The electric machine of claim 9 , wherein the rotary element is constructed as a screw or bolt.

11. The electric machine of claim 8 , wherein the rotor body has in the axial end region of each of the guides an opening which runs in the radial direction, each said locking fixture having an interlocking element which is moved into the opening as the moving element is moved to thereby implement the positive fit.

12. The electric machine of claim 11 , wherein the locking fixtures have each a displacement element of a wedge-shaped configuration, said movable moving element being constructed as a rotatable rotary element which when rotated causes the displacement element to move in an axial direction of the rotary element against the interlocking element so as to move the interlocking element into the opening.

13. The electric machine of claim 8 , wherein the locking fixtures have each a first basic element and a second basic element so constructed that a movement of the moving element causes the first and second basic elements to be pressed against the guide to establish the interference fit.

14. The electric machine of claim 13 , wherein the second basic element has an angled side face in mechanical contact with the first basic element, said moving element being constructed as a rotatable rotary element which, when rotated displaces the second basic element in an axial direction of the rotary element and presses the second basic element against the first basic element, thereby moving the first and second basic elements in opposite directions to each other in the direction of rotation of the rotor and pressing the first and second basic elements against the guide.

Assignees

• Hartmann Ulrich
• Knop Christian
• Schwengber Robert
• Trogisch Gordon
• Siemens Ag

Inventors

• Hartmann Ulrich
• Knop Christian
• Schwengber Robert
• Trogisch Gordon

Classifications

• H02K7/1838

  Generators mounted in a nacelle or similar structure of a horizontal axis wind turbine · CPC title

• H02K1/2786

  Outer rotors · CPC title

• H02K1/278

  Surface mounted magnets; Inset magnets · CPC title

• H02K1/28 Primary

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

• H02K1/2791

  Surface mounted magnets; Inset magnets · CPC title