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:
Mar. 07, 2017
Filed:
Feb. 29, 2012
Applicants:
Tero Ahonen, Lappeenranta, FI;
Jero Ahola, Lappeenranta, FI;
Jussi Tamminen, Lappeenranta, FI;
Inventors:
Assignee:
ABB Technology Oy, Helsinki, FI;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
F04D 15/00 (2006.01); G01F 25/00 (2006.01); G01F 1/80 (2006.01);
U.S. Cl.
CPC ...
F04D 15/0088 (2013.01); G01F 1/80 (2013.01); G01F 25/003 (2013.01);
Abstract
An exemplary method for determining a flow rate of a pump, includes measuring and storing the flow rate (Q) when the pump is in operation, storing rotational speed (n) and torque (T) of the pump during measurement of the flow rate (Q), determining torque (T) corresponding to the measured flow rate (Q), calculating a bias value of the torque (T) by comparing the torque determined from the characteristic curve (T) and the stored torque (T) of the pump, and determining an operating point of the pump based on the bias value of the torque (T).