Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1997-10-09
1999-09-14
Enad, Elvin G.
Electrical generator or motor structure
Dynamoelectric
Rotary
310 49R, 310112, 310165, 310178, 310261, 310263, H02K 100
Patent
active
059527595
ABSTRACT:
A brushless synchronous rotary electrical machine comprises stationary stator and "inner" windings. Only the rotor moves. The inner windings are stationary helical windings, concentric with the rotor shaft and attached to the stator armature. Variation in time of the magnetic field associated with the rotor is provided by two magnetically interactive (ferromagnetic or ferrimagnetic) rotor projections that sweep past the sides of the inner windings as the shaft rotates, each projection including a certain number of lobes. The stator includes a magnetically active hub, within which the rotor rotates, from which project magnetically active stator cores. The stator windings are wound helically around the stator cores. Because all windings are stationary, brushes and rings are not needed. With three times as many stator cores as lobes in each projection, the machine functions as a three-phase generator. In an alternative embodiment, permanent magnets in the rotor projections are used instead of the inner windings to provide the magnetic field.
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Enad Elvin G.
Friedman Mark M.
S.H.R. Limited BVI
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