Otis Elevator Company

Juergen Gewinner

Peter L Herkel

Dirk Heinrich Tegtmeier

Daryl J Marvin

Michael Mann

Marvin Dehmlow

Hans-Kilian Josef Spielbauer

Axel S Pfeffer

Felix Benjamin Donath

Matthias Hoinkis

Gianfranco Giannini

Stefan Lothar Seelmann

An elevator system includes a primary source of electrical power; a power unit having a power supply, the power supply producing DC power from the primary source of electrical power. A rescue storage device provides power to the elevator system when the primary source of electrical power is unavailable. The rescue storage device is coupled to an output of the power supply to provide additional DC power with the DC power when the primary source of electrical power is available and an increased power requirement is present.

Elevator system using rescue storage device for increased power

A system and method for providing a protective extra low voltage power supply in an elevator system () is disclosed. The power supply system () may include a switch mode power supply () configured to provide an output voltage, a first voltage monitor () and a second voltage monitor (). Each of the first voltage monitor () and the second voltage monitor () may be configured to receive the output voltage and determine an over-voltage condition at the switch mode power supply ().

System and method for limiting over-voltage in power supply system

An elevator control system includes a control power supply, a computing core in communication with the control power supply, a communication power supply in communication with the computing core, and a sleep monitor in communication with the control power supply, the computing core, and the communication power supply. The sleep monitor is disposed to selectively turn on/off the control power supply and the computing core, and the sleep monitor is disposed to selectively change an operating state of the communication power supply to a low voltage state.

Elevator control system with sleep monitor

An exemplary safety circuit includes a plurality of contacts that are configured to establish a conductive path across the contacts when the contacts are in electrically conductive contact with each other. The contacts selectively interrupt the conductive path across them when the contacts are separated. A controller selectively introduces a voltage pulse across the contacts at a voltage level that is effective to overcome an electrical resistance of any contamination on at least one of the contacts. The controller introduces the voltage pulse at least when the contacts are expected to be in contact to establish the conductive path.

Safety circuit

The present invention relates to an elevator door controller system for operating doors of an elevator car. The system includes a travelling cable for delivering DC power to the car. The car includes a power storage device for storing DC power from the travelling cable, a DC motor for operating the car doors, and an elevator door drive powered by the power storage device for driving the DC motor to operate the car doors.

System for providing DC power to elevator car

An elevator rescue system for moving an elevator car to a disembarkation position in a rescue operation includes a rescue device () coupled to a brake system () of an elevator, the rescue device () comprising a rescue power source (), wherein the rescue device () is disposed near the brake system () of the elevator; an operation panel () comprising a manual rescue operation switch (), the operation panel () being disposed remotely from the rescue device (); and a rescue operation signal transmission path () between the rescue device () and the operation panel ().

Elevator rescue system including communications over a rescue operation signal transmission path

A control circuit selectively energizes a load, such as an elevator or escalator brake (). The circuit includes a transformer () with a primary-winding connected to a series with a semiconductor switch () that is driven by a pulse width modulation (PWM) controller. Power to the PWM controller is supplied through safety relay contacts (A,B). When the load is to be energized, the safety relay contacts are closed and the PWM controller drives the semiconductor switch to supply energy through the transformer to the secondary circuit. A command signal to secondary circuitry () causes power in the secondary to be applied to the load (). If the safety relay contacts open, the PWM controller turns off and power is no longer delivered to the secondary circuit and the load.

Growing community of inventors

Berlin, Germany

Juergen Gewinner