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, 2009
Filed:
Mar. 22, 2006
Applicant:
Stefan Zeh, Wangen, DE;
Inventor:
Stefan Zeh, Wangen, DE;
Assignee:
Diehl AKO Stiftung & Co. KG, Wangen, DE;
Primary Examiner:
Int. Cl.
CPC ...
H02P 3/18 (2006.01);
U.S. Cl.
CPC ...
Abstract
Electronic motor regulation for a pump with a multi-phase permanent-magnet synchronous motor (PMSM). The system is enabled to detect and estimate a rotor phase position and rotary speed. Foam or air operation is detected by way of fluctuations in the estimated rotary speed.