Power supply for elevator systems having variable speed drives

Details Power supply for elevator systems having variable speed drives Power supply for elevator systems having variable speed drives

2007-07-24

2007-07-24

Salata, Jonathan (Department: 2837)

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

C187S297000

Reexamination Certificate

active

10769527

ABSTRACT:
An improved system of variable speed drives that enhances the energy efficiency of an elevator system by enabling power transfer between the variable speed drives of two or more elevators via a common DC bus. Any combination of regenerative and non-regenerative variable speed drives may be used with the present invention. Energy storage devices may be connected to the common DC bus further improve efficiency.

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patent: 6732838 (2004-05-01), Okada et al.
patent: 6742630 (2004-06-01), Eilinger
patent: 6938733 (2005-09-01), Eilinger

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