Device for controlling and regulating the relative speed between

Details Device for controlling and regulating the relative speed between Device for controlling and regulating the relative speed between

1996-08-08

1998-02-03

Cabeca, John W.

Electricity: motive power systems

Motor structure adjustment or control

Both armature and field structures rotatable or adjustable

318 84, 388903, 494 9, 494 84, B04B 120, H02K 2348

Patent

active

057148589

ABSTRACT:
A device for controlling and regulating the relative speed between the scroll (4) and drum (2) of a centrifugal extractor, comprising a dc or ac electric motor (10), stator (10a) of which is made integral with drum (2) and rotor (10b) of which is made integral with a gear (7) which drives scroll (4) via appropriate means (7a, 8a, 14a; 7b, 8b, 14b) of connection, there being furthermore provided means (30a, 30b) for detecting the speeds of rotation of such rotor (10b) and stator (10a) and for converting them into a representative electric signal, and means (40, 50) for comparing such electric signals designed to emit a signal (D.sub.rs) capable of operating means (60; 1060) for supplying to rotor (10b) a current capable of compensating for any deviations of the parameters of the extractor from the programmed operating conditions.

REFERENCES:
patent: 3676723 (1972-07-01), Drucker
patent: 3835357 (1974-09-01), Holzer
patent: 3851819 (1974-12-01), Tadokoro
patent: 3982162 (1976-09-01), Ollife
patent: 4827197 (1989-05-01), Giebeler
patent: 5203762 (1993-04-01), Cooperstein

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