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:
Oct. 27, 2009
Filed:
Aug. 19, 2004
Ismail Agirman, Famington, CT (US);
Vladimir Blasko, Avon, CT (US);
Christopher Czerwinski, Famington, CT (US);
Ismail Agirman, Famington, CT (US);
Vladimir Blasko, Avon, CT (US);
Christopher Czerwinski, Famington, CT (US);
Otis Elevator Company, Farmington, CT (US);
Abstract
A powering arrangement () for a device () that normally operates on three phase power has the capability of operating based upon single phase power. One disclosed technique includes estimating a direct component based upon a measured voltage across the leads coupled with the single phase power supply. The quadrature component is estimated based upon a numerical derivative of the direct component. The direct component is also provided to a current regulator in a feed forward control manner, which minimizes error.