Elevator start jerk removal

US5424498A · kind A · utility

Assignee

• OTIS ELEVATOR COMPANY · US

Inventors

• Hans-Kilian Spielbauer · Berlin, DE
• Michael Peters · Berlin, DE

Key dates

• Filing date: Jun 29, 1994
• Grant date: Jun 13, 1995
• Expiry date: Jun 29, 2014

Classification

• Technology area (CPC B): Performing Operations; Transporting
• CPC primary: B66B1/285
• WIPO field: Handling
• WIPO sector: Mechanical engineering

Abstract

A constant bias velocity is dictated from a profile generator, while a torque value sent to an elevator drive is increased linearly until motion is detected. Then, the torque value is frozen. A normal velocity profile is started and coupled without discontinuity to the prior bias velocity dictation. In response to activation of an elevator loadweighing switch, an initial torque value is provided without boundary values stored in a table. Such static friction keeps an elevator car motionless when an elevator brake is lifted.