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US 10,594,190 B2Granted
Electrical machine rotors
AssigneeABB Schweiz AG
InventorsDarren D. Tremelling, Yujing Liu
Life of this patent
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Abstract
Rotors for electrical machines and methods of fabricating the same are disclosed. Electrical machine rotors may include a hollow non-magnetic shaft, an active region, and a plurality of coolant passages extending within the active region. The hollow non-magnetic shaft may extend along an axis and have an exterior surface that defines a shaft space extending along the axis. At least a portion of the active region may be disposed within the shaft space.
Claims20
A method of fabricating a rotor for an electrical machine, comprising:
- providing a hollow non-magnetic shaft extending along an axis and having an interior surface defining an interior;
- inserting a plurality of magnets into the interior of the shaft;
- arranging the magnets around the interior surface to define a central region extending along the axis;
- inserting a backiron package into the central region;
- and
- radially and plastically expanding the backiron package to urge and preload the magnets against the interior surface of the shaft.
3 more elements
Dependencies are inferred from the claim text.