Elevator door motor compensations
US4300662A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Dec 27, 1979 |
| Grant date | Nov 17, 1981 |
| Priority date | — |
| Expiry date | Dec 27, 1999 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG05B2219/45242
- WIPO fieldControl
- WIPO sectorInstruments
Abstract
An elevator system includes a microprocessor-based cab controller mounted directly on an elevator car, which controls elevator door motion in response to the difference between elevator door velocity and a desired dictated door velocity. The signals driving the elevator motor include compensation signals for hoistway door spirators, static door friction, and variations in the door operator mechanism as a function of door position, and are generated, in the disclosed embodiment, to take into account the variation in door motion as a function of door motor motion. An exemplary elevator system, an exemplary microprocessor-based controller, and logic flowcharts for an overall door control program, as well as details of the invention herein are disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.