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:
Nov. 24, 2020
Filed:
Nov. 02, 2017
Applicant:
Schweitzer Engineering Laboratories, Inc., Pullman, WA (US);
Inventors:
Marcos A. Donolo, Pullman, WA (US);
Jay Hartshorn, Moscow, ID (US);
Assignee:
Schweitzer Engineering Laboratories, Inc., Pullman, WA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H02P 1/50 (2006.01); H02P 23/08 (2006.01); H02P 29/60 (2016.01); G01R 31/34 (2020.01); H02H 7/08 (2006.01); H02P 1/26 (2006.01); G01R 19/25 (2006.01); G01R 19/175 (2006.01);
U.S. Cl.
CPC ...
H02P 23/08 (2013.01); G01R 31/343 (2013.01); H02H 7/0805 (2013.01); H02P 1/50 (2013.01); H02P 29/60 (2016.02); G01R 19/175 (2013.01); G01R 19/2513 (2013.01); H02P 1/26 (2013.01); H02P 2203/09 (2013.01);
Abstract
Monitoring conditions of an electric motor using stator current and voltage signals from power supplied to the motor is disclosed herein. The stator voltage and current signals may be used to calculate instantaneous power values which may be used to calculate slip. The slip may be used to monitor for a locked rotor condition during startup of the motor. The slip value may be used to provide thermal protection to the electric motor.