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:
Dec. 24, 2019
Filed:
Dec. 18, 2013
Otis Elevator Company, Farmington, CT (US);
Ismail Agirman, Southington, CT (US);
Shashank Krishnamurthy, Rocky Hill, CT (US);
Prasanna Nagarajan, Farmington, CT (US);
Hanjong Kim, Avon, CT (US);
Yang Wang, East Hartford, CT (US);
OTIS ELEVATOR COMPANY, Farmington, CT (US);
Abstract
A method () for controlling a multilevel regenerative drive () having a converter () and an inverter () is disclosed. The method () may include applying at least one of unipolar modulation and bipolar modulation to the converter (), and applying at least one of unipolar modulation and bipolar modulation to the inverter (). A control system () for a mechanical system () having a motor () is also disclosed. The control system () may comprise a converter () operatively connected to a power source (), and an inverter () operatively connected to the motor () of the mechanical system (). At least one controller may be in communication with the converter () and inverter (), and may be configured to apply at least one of unipolar modulation and bipolar modulation to each of the converter () and the inverter ().