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. 21, 2009
Filed:
Oct. 30, 2006
Applicant:
Alexander S. Filippenko, Cary, NC (US);
Inventor:
Alexander S. Filippenko, Cary, NC (US);
Assignee:
Square D Company, Palatine, IL (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H02P 6/06 (2006.01);
U.S. Cl.
CPC ...
Abstract
A controller for an automatic transfer switch mechanism in an electrical distribution panel, which automatically determines motor phase by monitoring the back EMF voltage of the motor when no power is applied to the motor as defined by a pulse width modulation circuit. Phase comparisons of the voltage on the line and load sides of the transfer switch mechanism determine the position of the transfer switch mechanism.