Tom Sullivan-Explosives Technician/Loader formerly of Controlled Demolition Inc.
http://www.youtube.com/watch?v=u5IgqJXyLbg&feature=player_embedded#!Elevator World Magazine-Article 2-20-2001
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DRIVE TO THE TOP
by Robert Baamonde, Jr.
At a time when new construction is dominating the market, ACE Elevator undertook what was perhaps, one of the largest, most sophisticated elevator modernization programs in the industry's history. This "towering" achievement took place at New York City's prestigious World Trade Center (WTC), with the completion of the first six members of the elite "Shuttle Fleet."
This project was originally intended to operate with the existing 275kW motor-generator sets that were specifically designed for the WTC project. However, both the Port Authority of New York and New Jersey and ACE Elevator Co. Inc. had the collective vision of utilizing cutting-edge, solid-state-drive technology to replace the existing motor generator sets.
All the parties involved felt that implementing this innovation would significantly enhance the elevators' operation and eliminate countless problems associated with the motor generator rotating elements. Although similar technology is used every day throughout the elevator industry, no equipment available at the time met the power requirements demanded by this type of installation.
New technology had to be developed to achieve what was in mind. The WTC shuttle fleet represents, arguably the largest, fastest and most menacing equipment in the industry. The dynamics of the shuttle cars, together with unique logistical obstacles from within the complex, posed challenging engineering and installation scenarios far exceeding the typical modernization program.
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