Elevator system having linear drive
US10549954B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 22, 2015 |
| Grant date | Feb 4, 2020 |
| Priority date | — |
| Expiry date | Feb 4, 2037 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB66B9/003
- WIPO fieldHandling
- WIPO sectorMechanical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.