Multiple stator, single shaft electric machine

Details Multiple stator, single shaft electric machine Multiple stator, single shaft electric machine

1995-10-20

1998-07-21

Stephan, Steven L.

Electrical generator or motor structure

Dynamoelectric

Rotary

310114, H02K 1600

Patent

active

057838933

ABSTRACT:
An electric machine, such as a motor or generator, is configured in a machine housing with a cup-shaped rotor attached to a shaft rotatively supported in the housing, an inner stator coaxial with and enclosed by the rotor, and an outer stator coaxial with and enclosing the rotor. The inner and outer portions of the machine are separated by a magnetic isolator that divides and supports inner and outer portions of the rotor. The magnetic isolator, which supports inner and outer sets of permanent magnets in one embodiment and inner and outer squirrel cage rotor assemblies in another embodiment is preferably made of non-magnetic stainless steel but may also be made of titanium, brass, aluminum, bronze or magnesium, or any material that provides magnetic isolation between the inner and outer portions of the machine.

REFERENCES:
patent: 4375047 (1983-02-01), Nelson et al.
patent: 4517484 (1985-05-01), Dacier
patent: 4651040 (1987-03-01), Gerstner et al.
patent: 4714853 (1987-12-01), Palmero et al.
patent: 4829205 (1989-05-01), Lindgren
patent: 5107156 (1992-04-01), Jaun et al.
patent: 5281879 (1994-01-01), Satake et al.
patent: 5289072 (1994-02-01), Lange
patent: 5345133 (1994-09-01), Satake
patent: 5396140 (1995-03-01), Goldie et al.
patent: 5525851 (1996-06-01), Kumamoto et al.

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