US 11,885,342 B1
Controller and method for adaptive speed control of a fan array
Jibo Liu, Long Grove, IL (US)
Assigned to Siemens Industry, Inc., Alpharetta, GA (US)
Filed by Siemens Industry, Inc., Alpharetta, GA (US)
Filed on Aug. 17, 2022, as Appl. No. 17/820,471.
Int. Cl. F04D 25/06 (2006.01); F04D 27/00 (2006.01); F04D 25/16 (2006.01)
CPC F04D 27/001 (2013.01) [F04D 25/06 (2013.01); F04D 25/166 (2013.01); F04D 27/004 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A method for adaptive speed control of a fan array of an air handling unit, the method comprising:
identifying a fan speed command for the fan array;
scaling the fan speed command based on a floating maximum fan speed;
detecting a fan error of at least one fan of the fan array;
adjusting the floating maximum fan speed in response to detecting the fan error;
rescaling the fan speed command based on the adjusted floating maximum fan speed; and
providing the fan speed command to each fan of the fan array.