Back to results
US 9,431,857 B2Granted
Permanent magnet rotor arrangement incorporating profiled tubes for permanent magnets
AssigneeSiemens Aktiengesellschaft
InventorHenrik Stiesdal
Life of this patent
Estimating the term…
Abstract
A permanent magnet rotor arrangement includes a rotor and a plurality of nonmagnetic, axially extending profiled tubes defining a closed channel and affixed circumferentially along the outer rim of the rotor. A plurality of permanent magnet pole pieces are arranged in the channels. A single pole piece is arranged in each channel. The cross-sectional profile of the pole piece does not correspond to the cross-sectional profile of the channel.
Claims10
A permanent magnet rotor arrangement, comprising:
- a rotor;
- a plurality of nonmagnetic, axially extending profiled tubes defining a closed channel and affixed circumferentially along the outer rim of the rotor;
- a plurality of permanent magnet pole pieces arranged in the channels,
- wherein only one pole piece is arranged in each channel, wherein said only one piece is completely encapsulated by a respective nonmagnetic profiled tube, and
- wherein the cross-sectional profile of the pole piece along a radial plane initially does not correspond to the cross-sectional profile of the channel along the radial plane,
- wherein spaces are initially produced in each channel, between a surface of each pole piece and an inner surface of each tube,
- wherein each of the plurality of nonmagnetic profiled tubes is compressed by an external compressing means or a vacuum is applied to each of the plurality of nonmagnetic profiled tubes to match the cross-sectional profile of the channel to the cross-sectional profile of the pole piece, such that their cross-sectional profiles are finally substantially equal.
4 more elements
Dependencies are inferred from the claim text.