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:
Jan. 14, 2014
Filed:
Nov. 21, 2008
Vladimir Blasko, Avon, CT (US);
Ismail Agirman, Southington, CT (US);
Stella M. Oggianu, Farmington, CT (US);
Robert K. Thornton, Coventry, CT (US);
Vladimir Blasko, Avon, CT (US);
Ismail Agirman, Southington, CT (US);
Stella M. Oggianu, Farmington, CT (US);
Robert K. Thornton, Coventry, CT (US);
Otis Elevator Company, Farmington, CT (US);
Abstract
A three-phase regenerative drive () is operated based upon power from a single-phase AC source () and power from a DC source (). The single-phase AC input power and the DC input power are converted to DC voltage on a DC bus () by a three-phase converter (). DC power is provided from the DC bus () to a three-phase inverter having outputs connected to a motor (). A controller () controls operation of the three-phase converter () based upon contribution factors of the AC and DC sources () during motoring and regeneration. The controller () also controls an AC component of current from the DC source to reduce ripple current on the DC bus ().