Concentric-double-shaft simultaneously rotating apparatus

Details Concentric-double-shaft simultaneously rotating apparatus Concentric-double-shaft simultaneously rotating apparatus

1997-02-25

1998-02-10

Dougherty, Thomas M.

Electrical generator or motor structure

Dynamoelectric

Rotary

310 75D, 310 96, 310103, 310105, 310112, 464 29, 464182, 416 68, 416 69, H02K 4900

Patent

active

057172641

ABSTRACT:
A concentric-double-shaft simultaneously rotating apparatus in which a part of the force for driving an inner shaft to rotate is obtained by a device other than a rotation controlled motor to thereby reduce the capacity of the rotation controlled motor to attain reduction in size of the apparatus, increase of stiffness, and so on. The concentric-double-shaft simultaneously rotating apparatus includes at least one permanent magnet which is attached onto an inner circumferential surface of an outer shaft, and a secondary conductor such as a copper pipe, or the like, is provided on an outer circumferential surface of the inner shaft to create an induced current flow.

REFERENCES:
patent: 4197474 (1980-04-01), Honigsbaum
patent: 4841185 (1989-06-01), Weldon

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