US 11,953,867 B2
Multi-pump control system
Carsten Skovmose Kallesøe, Bjerringbro (DK); and Mogens Groth Nicolaisen, Bjerringbro (DK)
Assigned to GRUNDFOS HOLDING A/S, Bjerringbro (DK)
Filed by GRUNDFOS HOLDING A/S, Bjerringbro (DK)
Filed on Jul. 15, 2021, as Appl. No. 17/376,687.
Claims priority of application No. 20186495 (EP), filed on Jul. 17, 2020.
Prior Publication US 2022/0019182 A1, Jan. 20, 2022
Int. Cl. G05B 13/04 (2006.01); G08B 21/18 (2006.01); H04Q 9/02 (2006.01)
CPC G05B 13/048 (2013.01) [G08B 21/182 (2013.01); H04Q 9/02 (2013.01); H04Q 2209/60 (2013.01)] 25 Claims
OG exemplary drawing
 
1. A multi-pump control system comprising:
a control module;
a processing module;
a communication interface; and
a storage module;
wherein the control module is configured to change a number of running pumps of a multi-pump system;
wherein the communication interface is configured to receive a signal indicative of a power consumption P and information about a speed ω of at least one of the running pumps before and after at least two different changes of an operating parameter of the running pumps;
wherein the processing module is configured to determine, before and after at least two different changes of the operating parameter of the running pumps, without a measurement of a differential pressure and of a flow, at least two approximated pump characteristics, wherein each of the approximated pump characteristics is unambiguously defined by a pair of parameters;
selectively changing the number of operating pumps based on the pair of parameters.