Permanent magnet retaining arrangement for high speed rotors
AssigneeElectric Boat Corporation
InventorsPieter Van Dine, Alberto Franco, Spyro Pappas, Michael Gheorghiu
Life of this patent
Estimating the term…
Abstract
In the embodiments described in the specification, permanent magnets are retained on a permanent magnet rotor rim by inverted U-shaped retainers and in one embodiment the outer surfaces of the retainers converge inwardly in the radially outward direction and engage corresponding surfaces of adjacent pole pieces which converge inwardly in the radially outward direction. In another embodiment the U-shaped retainers are affixed to the rotor rim by screws accessible through openings in the radially outer wall of the retainers and a further embodiment each retainer has outwardly projecting flanges which are affixed to the rotor rim by screws.
Claims7
A permanent magnet rotor arrangement comprising:
- a rotor having a rim;
- a circumferential array of pole pieces made of magnetic material affixed to the rotor rim;
- an inverted U-shaped magnet retainer made of nonmagnetic material and formed with a channel mounted between each adjacent pair of pole pieces;
- and
- at least one permanent magnet inserted into the channel formed in each U-shaped retainer.
Dependencies are inferred from the claim text.