Drive control for an elevator

US4337847A · kind A · utility

Assignee

• INVENTIO AG · CH

Inventors

• Joris Schroder · Luzern, CH
• Martin Meier · Heidenheim, DE

Key dates

• Filing date: Sep 4, 1980
• Grant date: Jul 6, 1982
• Expiry date: Sep 4, 2000

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B66B1/40
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A drive control for transportation systems, especially elevators or the like, improves the stopping accuracy of the elevator cabin at a storey or floor of the building. A reference value transmitter operated by a digital computer produces step-like successive travel curves and displacement path-reference values operatively associated with such travel curves and feedable to a regulation circuit. Connected with the reference value transmitter is a stop initiation device, which during initiating the stop or halting of the elevator, forms from a possible target path produced by the reference value transmitter and a target path corresponding to a target storey a target error. This target error is infed to a stop correction device connected with the reference value transmitter and the stop initiation device, which while utilizing the target error modifies by interpolation the travel curve which is to be produced by the reference value transmitter in a manner such that there is available for regulation an optimum travel curve to the target storey. An arrival correction device which further improves the halt or stop accuracy of the elevator, forms from the elevator cabin site determined at…