Invention Grant
- Patent Title: Elevator system having linear drive
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Application No.: US15537499Application Date: 2015-12-22
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Publication No.: US10549954B2Publication Date: 2020-02-04
- Inventor: David Ginsberg , Fernando Rodriguez
- 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/US2015/067263 WO 20151222
- International Announcement: WO2016/106275 WO 20160630
- Main IPC: B66B5/00
- IPC: B66B5/00 ; B66B11/04 ; H02K41/03 ; B66B9/00

Abstract:
According to an aspect, an elevator system includes an elevator car 14 to travel in a hoistway 11 and a linear propulsion system 20 to impart force to the elevator car. The linear propulsion system includes a secondary portion 18 mounted to the elevator car and a primary portion 16 mounted in the hoistway. The primary portion includes a plurality of motor segments 26. The elevator system also includes a load sensor 52 operable to detect an elevator load on a brake. The elevator system further includes a control system 46 operable to apply an electrical current to at least one of the motor segments that overlaps the secondary portion, determine a measurement of the elevator load, and vary an electrical angle estimate while the brake is engaged and thrust is applied.
Public/Granted literature
- US20170362062A1 ELEVATOR SYSTEM HAVING LINEAR DRIVE Public/Granted day:2017-12-21
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