Adjustable speed drive system for centrifugal fan

Details Adjustable speed drive system for centrifugal fan Adjustable speed drive system for centrifugal fan

F - Mech Eng,Light,Heat,Weapons

04

D

230/2

F04D 27/00 (2006.01) F04B 49/06 (2006.01)

Patent

CA 1118735

CENTRIFUGAL FAN AIR CONTROL SYSTEM ABSTRACT OF THE DISCLOSURE A centrifugal fan provided with dampers is driven by a motor having a speed control circuit. Air flow from the centrifugal fan is controlled from a point of maximum the velocity of the fan impeller with subsequent air flow con- trol at air flow rates below said crossover speed being attained only by adjustment of the fan dampers.

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