Patent Number: 7,422,089

Title: Drive unit for an elevator

Abstract: An elevator drive unit including a traction sheave supported by a shaft rotatably supported by a pair of bearings. Mounted on opposite free ends of the shaft are rotors of a pair of electric motors. Cage-housings on a pair of spaced bearing end-plates retain the stators of the motors. A plurality of frequency converters operating in a master/slave mode to supply electrical power to the motors.

Inventors: Ammon; Urs (Ebikon, CH), Cholinski; Andrzej (Ebikon, CH), Luthi; Christian (Lucerne, CH)

Assignee: Inventio AG

International Classification: B66B 1/06 (20060101); B66B 11/08 (20060101); H02P 7/00 (20060101)

Expiration Date: 2020-09-09 0:00:00