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:
Apr. 10, 2012
Filed:
Jun. 20, 2008
Applicants:
Carsten Skovmose Kallesøe, Viborg, DK;
Henrik Kragh, Skørping, DK;
Inventors:
Carsten Skovmose Kallesøe, Viborg, DK;
Henrik Kragh, Skørping, DK;
Assignee:
Grundfos Management a/s, Bjerringbro, DK;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01K 1/00 (2006.01); F01B 25/00 (2006.01);
U.S. Cl.
CPC ...
Abstract
A method is provided for determining the temperature of the delivery fluid of a centrifugal pump driven by a permanent magnet motor, whose rotor runs within a fluid-filled can. The rotor temperature is evaluated by way of electrical variables of the motor, and the temperature of the delivery fluid is determined by way of the rotor. This method permits sensor-free temperature measurement of the delivery fluid with a circulation pump which is driven by a permanent magnet synchronous motor.