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:
Jan. 22, 2019
Filed:
Mar. 26, 2015
Wilo SE, Dortmund, DE;
Tilmann Sanders, Dortmund, DE;
Jens Fiedler, Dortmund, DE;
WILO SE, Dortmund, DE;
Abstract
The invention relates to a method of determining a first hydraulic variable (Q) of a pump assembly () operated at a predefinable rotation speed (n) from a mechanical or electrical variable (M, P, n) by evaluating a correlation between the hydraulic variable (Q) with the mechanical or electrical variable (M, P, n). A control parameter (M, n) of the pump assembly () is acted on by a periodic excitation signal (f(t), f(t)) having a predetermined frequency (f) such that a second hydraulic variable (H, Δp) is modulated. The instantaneous value of the first hydraulic variable (Q) is determined from the mechanical or electrical variable (M(t), P(t), n(t)) as a system response (X(t)) to the excitation signal (f(t), f(t)), using the correlation. The invention further relates to a pump control system and a pump assembly that are configured for carrying out the method.