Method for controlling the acceleration of a centrifuging device

Details Method for controlling the acceleration of a centrifuging device Method for controlling the acceleration of a centrifuging device

1983-11-22

1985-04-30

Coe, Philip R.

Bleaching and dyeing; fluid treatment and chemical modification

Fluid treatment

Manipulation of liquid

68 12R, 68 231, 68 24, D06F 3302

Patent

active

045134642

ABSTRACT:
The invention relates to centrifuging devices, and particularly to the acceleration thereof to a design speed. In order to prevent imbalance (U) of the device exceeding a permitted maximum value (U.sub.m) during acceleration, the imbalance (U) is monitored and acceleration (.alpha.) controlled as a function of temporal changes in the imbalance (U). Acceleration n/.sub.t may be controlled in relation to the difference (.DELTA.U) between the measured imbalance (U) and the maximum value (U.sub.m), in relation to the rate of change (.beta.) of the measured imbalance, or to maintain the imbalance (U) between upper (U.sub.1) and lower (U.sub.2) threshold values at or below the maximum value (U.sub.m). Acceleration to the design speed can thus be accomplished with minimum delay and variation with reference to operating criteria of the device.

REFERENCES:
patent: 3226960 (1966-01-01), Mellinger
patent: 3322278 (1967-05-01), Ishoy et al.
patent: 3583182 (1971-06-01), Matsuura
patent: 4113325 (1978-09-01), Miller

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