Low inertia, speed variable induction motor

Details Low inertia, speed variable induction motor Low inertia, speed variable induction motor

1986-07-28

1987-08-25

Duggan, Donovan F.

Electrical generator or motor structure

Dynamoelectric

Rotary

310166, 310266, 310 89, H02K 710

Patent

active

046895094

ABSTRACT:
A low inertia, speed variable induction motor comprises a frame, a stator fixedly placed in the frame, a yoke fixedly placed in the frame in opposition to the stator with a predetermined gap and a cup-shaped rotor which is inserted into the gap and is fixedly mounted on an output shaft supported in the frame in a freely rotatable manner. Rotating magnetic field is produced in the gap by the stator and the yoke to generate a rotational torque of the cup-shaped rotor. The cup-shaped rotor is formed of a material or materials having a hysteresis characteristic and an eddy current producing characteristic to obtain a large torque.

REFERENCES:
patent: 2482840 (1949-09-01), Collins et al.
patent: 2626366 (1953-01-01), Stoner et al.
patent: 2653256 (1953-09-01), Walley et al.
patent: 2653257 (1953-09-01), Sailer
patent: 2929946 (1960-03-01), Aske
patent: 2974242 (1961-03-01), Apstein

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