Invention Grant
- Patent Title: Elevator system including a permanent magnet (PM) synchronous motor drive system
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Application No.: US15750964Application Date: 2016-08-04
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Publication No.: US11078049B2Publication Date: 2021-08-03
- Inventor: Edward D. Piedra
- Applicant: Otis Elevator Company
- Applicant Address: US CT Farmington
- Assignee: Otis Elevator Company
- Current Assignee: Otis Elevator Company
- Current Assignee Address: US CT Farmington
- Agency: Cantor Colburn LLP
- International Application: PCT/US2016/045495 WO 20160804
- International Announcement: WO2017/027303 WO 20170216
- Main IPC: B66B11/04
- IPC: B66B11/04 ; B66B1/30 ; H02P21/09 ; H02P21/22 ; H02P21/36 ; B66B1/32

Abstract:
An elevator drive system (40) includes a permanent magnet (PM) synchronous electric motor (34) including a plurality of phases and a plurality of motor drives (55, 58) 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.
Public/Granted literature
- US20180222724A1 ELEVATOR SYSTEM INCLUDING A PERMANENT MAGNET (PM) SYNCHRONOUS MOTOR DRIVE SYSTEM Public/Granted day:2018-08-09
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