US Patent Application 20050224296 - Energy efficient variable speed drive for elevator systems

Application 20050224296 Filed on January 30, 2004. Published on October 13, 2005

Abstract Claims Description Full Text

Inventors

Smith, Rory
Nguyen, Hien T.

US Classes

187/277, With specific electrical component187/297Limited to power source (i.e., motor) utilizing D.C. power

Attorney, Agent or Firm

FROST BROWN TODD, LLC

International Class

07 B66B001/00 B66B001/28

Issued Patent Number:

7246686

Abstract text

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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