Cost effective control of the main switches of an elevator drive motor

US5549179A · kind A · utility

Assignee

• OTIS ELEVATOR COMPANY · US

Inventors

• Peter Herkel · Berlin, DE
• Hans-Kilian Spielbauer · Berlin, DE

Key dates

• Filing date: Jan 31, 1994
• Grant date: Aug 27, 1996
• Expiry date: Jan 31, 2014

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B66B1/06
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

The main disconnects for energizing a drive motor for an elevator may be controlled by a circuit having a safety chain, an inspection device, a circuit board and a coil for the main disconnect wherein the safety chain provides a safe condition signal to the inspection device which in turn provides a plurality of mode signals to the circuit board which evaluates the mode signals in order to provide a circuit breaker control signal to the circuit breaker coil. In turn, the circuit breaker coil either opens or closes the main disconnect.