公开(公告)号：US20220019182A1

公开(公告)日：2022-01-20

申请号：US17376687

申请日：2021-07-15

Applicant: GRUNDFOS HOLDING A/S

Inventor： Carsten Skovmose KALLESØE ,  Mogens Groth NICOLAISEN

IPC: G05B13/04 ,  H04Q9/02 ,  G08B21/18

Abstract: A multi-pump control system with a control module, a processing module, communication interface, and a storage module. The system is configured to change a number n of running pumps, and receive a signal indicative of a power consumption P and information about a speed ω of one of the n running pumps before and after two different changes of the number n of running pumps. The system is configured to determine, before and after at least two different changes of the number n of running pumps, without a measurement of a differential pressure Δp and of a flow Q, two approximated pump characteristics Pn and Δ{tilde over (p)}n, wherein each of the approximated pump characteristics Pn and Δ{tilde over (p)}n is unambiguously defined by a pair of parameters (θ1, θ2; θ3, θ4). The system is configured to store the pair of parameters (θ1, θ2; θ3, θ4) for each of the determined approximated pump characteristics Pn and Δ{tilde over (p)}n.