Invention Grant
- Patent Title: Rescue control and method of operating an elevator system including a permanent magnet (PM) synchronous motor drive system
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Application No.: US15750955Application Date: 2016-08-03
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Publication No.: US11014778B2Publication Date: 2021-05-25
- Inventor: Edward D. Piedra , Prasanna Nagarajan
- 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/US2016/045384 WO 20160803
- International Announcement: WO2017/027296 WO 20170216
- Main IPC: B66B1/30
- IPC: B66B1/30 ; B66B5/02 ; B66B9/00 ; B66B11/04

Abstract:
A permanent magnet (PM) synchronous electric motor (34) includes a plurality of phases, and a plurality of motor drives (55,58) electrically connected to the PM synchronous electric motor. Each of the 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. A controller (44) is operatively connected to each of the plurality of motor drives to selectively control the PM synchronous electric motor, and a rescue module (120) operatively connected to the controller, the rescue module being configured and disposed to determine a failure of one of the plurality of motor drives and control the PM synchronous electric motor in a reduced operation profile employing remaining ones of the plurality of motor drives.
Public/Granted literature
Information query
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