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US 8,026,649 B2Granted
Rotor for electric machine
AssigneeABB AB
InventorJere Kolehmainen
Life of this patent
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Abstract
Electric machine rotor comprising: an inner rotor element and an outer rotor element positioned more outwards in the radial direction than the inner rotor element, the inner rotor element and the outer rotor element being made of a material of high permeance, and an air gap of low permeance between the inner rotor element and the outer rotor element. The outer rotor element forms a shape-mating pair with the inner rotor element, the inner rotor element and the outer rotor element being shaped in such a way that radial detachment of the outer rotor element from the inner rotor element is prevented.
Claims20
An electric machine rotor comprising:
- an inner rotor element and an outer rotor element positioned more outwards in a radial direction of the rotor than the inner rotor element, the inner rotor element and the outer rotor element being made of a material of high permeance, and a low permeance gap being arranged between the inner rotor element and the outer rotor element,
- wherein the outer rotor element forms a shape-mating pair with the inner rotor element, and the inner rotor element and the outer rotor element are shaped such that radial detachment of the outer rotor element from the inner rotor element is prevented.
Dependencies are inferred from the claim text.