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:
Aug. 03, 2021
Filed:
Aug. 04, 2016
Applicant:
Otis Elevator Company, Farmington, CT (US);
Inventor:
Edward D. Piedra, Chicopee, MA (US);
Assignee:
OTIS ELEVATOR COMPANY, Farmington, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B66B 11/04 (2006.01); B66B 1/30 (2006.01); H02P 21/09 (2016.01); H02P 21/22 (2016.01); H02P 21/36 (2016.01); B66B 1/32 (2006.01);
U.S. Cl.
CPC ...
B66B 11/043 (2013.01); B66B 1/308 (2013.01); B66B 1/32 (2013.01); H02P 21/09 (2016.02); H02P 21/22 (2016.02); H02P 21/36 (2016.02); B66B 2201/00 (2013.01);
Abstract
An elevator drive system () includes a permanent magnet (PM) synchronous electric motor () including a plurality of phases and a plurality of motor drives () electrically connected to the PM synchronous electric motor. Each of the plurality of motor drives is operatively connected to a corresponding one of the plurality of phases. The plurality of motor drives is configured and disposed to deliver a torque current divided equally between each of the plurality of phases and independently deliver flux current to the corresponding one of the plurality of phases.