Drive unit for an elevator

Elevator – industrial lift truck – or stationary lift for vehicle – Having specific load support drive-means or its control – Includes control for power source of drive-means

Reexamination Certificate

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Details

C187S256000, C187S258000, C187S391000, C318S105000, C318S495000

Reexamination Certificate

active

07422089

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.

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