The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 29, 2020
Filed:
Oct. 22, 2015
Wilo SE, Dortmund, DE;
Jens Oppermann, Schwerte, DE;
Ana Constantin, Aachen, DE;
WILO SE, Dortmund, DE;
Abstract
The present invention relates to a method of operating an electric motor-driven centrifugal pump () in a hydraulic system () having at least one self-controlled load, where a gradient (dQ/dt) of the volumetric flow rate (Q) of the centrifugal pump () is determined and the current set-point delivery head (H) of the centrifugal pump () is calculated from a mathematical operation on the gradient (dQ/dt) weighted with a gain factor (K) and the last specified set-point delivery head (H). The operation describes a positive feedback between the set-point delivery head (H) and the volumetric flow rate (Q). The gain factor (K) is determined from a calculation instruction that is modified dynamically during operation of the centrifugal pump () taking into consideration the current operating point of the centrifugal pump () and taking into consideration a current and/or at least one past state of the hydraulic system ().