Otis Elevator Company

Andreas Tutat

Marvin Dehmlow

Helge Krambeck

Helmut Lothar Schroeder-Brumloop

Ingo Engelhard

Herbert Horbrügger

Ibrahim Ia Atalmis

An elevator safety system comprises a plurality of door safety units, each door safety unit; a communication bus connecting the plurality of door safety units; a control unit connected to the communication bus for allowing communication between the plurality of door safety units and the control unit; and at least one position sensor configured for providing information about the current position of an elevator car within a hoistway. Each door safety unit is assigned to an elevator hoistway door and configured for monitoring a condition of the assigned elevator hoistway door. The control unit is configured for polling door safety units included in a subset S, S) of the door safety units which are located within a predetermined distance (DD) from the current position of the elevator car.

Elevator safety system, elevator system and method of operating an elevator system

A drive unit for an elevator system, the drive unit including a multilayer, power circuit board; a first DC link formed in a layer of the power circuit board; a second DC link formed in a layer of the power circuit board; a first switch having a first terminal, the first switch mounted to a surface of the power circuit board; a first via electrically coupling the first terminal to the first DC link; a second switch having a second terminal, the second switch mounted to the surface of the power circuit board; and a second via electrically coupling the second terminal to the second DC link; the first via conducting heat from the first switch to the first DC link; the second via conducting heat from the second switch to the second DC link.

Low profile drive unit for elevator system

An elevator system and associated method includes power control for operating an elevator () in an emergency mode wherein the elevator () includes a car (), a drive motor (), a motor drive unit () which supplies power to the drive motor () and controls the same and an emergency power supply (). The motor drive unit () has a predetermined normal operation switching frequency. In an emergency mode, power is supplied to the motor from the emergency power supply () while the motor drive unit is in an emergency mode. An actual emergency operation condition characteristic is determined for setting the switching frequency of the motor drive unit () dependent on the actual emergency operation condition characteristic.

Growing community of inventors

Berlin, Germany

Andreas Tutat