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. 22, 2022
Filed:
May. 11, 2020
Applicant:
Rockwell Collins, Inc., Cedar Rapids, IA (US);
Inventor:
Thomas B. Campbell, Cedar Rapids, IA (US);
Assignee:
Rockwell Collins, Inc., Cedar Rapids, IA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 31/34 (2020.01); G01R 31/72 (2020.01);
U.S. Cl.
CPC ...
G01R 31/346 (2013.01); G01R 31/72 (2020.01);
Abstract
A system and method for detecting failures in a single-phase AC motor is disclosed. After a startup sequence, the motor is unpowered and a measurement is taken across terminals in the motor to detect a signal from residual magnetism in the iron core of the rotor. If the rotor was successfully started, the signal will be above a predetermined threshold. The signal may be measured across either a main stator winding or a start stator winding. Where the signal does not exceed the predetermined threshold, the startup sequence may be re-initiated and/or a failure message may be sent to an operator.