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:
Jul. 14, 2026
Filed:
May. 20, 2024
Abb Schweiz Ag, Baden, CH;
Matti Eskola, Helsinki, FI;
ABB SCHWEIZ AG, Baden, CH;
Abstract
A method and apparatus for operating a pump system comprising a rotary pump, a three-phase induction motor operably coupled to the rotary pump, and an AC drive operably coupled to the induction motor, the apparatus being configured to supply the induction motor with a three-phase AC voltage at multiple different angular velocities, monitor an output current of the AC drive generated in response to the supplied voltage at the multiple different angular velocities, determine an angular velocity of the supplied voltage at which at least one predetermined characteristic in the monitored output current is detected and determine a rotational velocity corresponding to the determined angular velocity as an estimate of the rotational velocity of the motor, wherein the pump system is operated on the basis of the determined estimate of the rotational velocity of the motor.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile