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Drives and Motors
Rope-Drive-Elevators-4

Rope-Drive Elevators

By Dr. Lee Gray | October 1, 2015

by Dr. Lee Gray, EW Correspondent The invention of new elevator systems has often followed a distinct developmental trajectory: inventors pursue a main or primary path that encompasses what eventually becomes the standard system, while simultaneously pursuing one or more secondary parallel paths. These secondary paths, which may be thought of as variations on the…

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Invertek-Identifies-Fills-Niche

Invertek Identifies, Fills Niche

By Lee Freeland | October 1, 2015

A Company Spotlight on British AC VFD manufacturer and two of its most important recent projects U.K.-based Invertek Drives Ltd. designs, manufactures and markets electronic variable-frequency drives (VFDs) for controlling electric motors. It was established in Welshpool, U.K., in 1998 when its board of directors identified a niche in the market for a range of…

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Elevator-Motors-Disc-Rotor-Motor-and-Electronic-Brake-Control

Elevator Motors, Disc Rotor Motor and Electronic Brake Control submitted

By Elevator World | October 1, 2015

Ziehl-Abegg presents new products at Interlift. Ziehl-Abegg is showcasing SM132 and SM210 elevator motors designed to minimize space, cost and weight, along with the ZAdisc disc rotor motor and ZAsbm4C electronic brake control, at Interlift. Compared with motors of equal power, the frameless SM132 elevator motor (with a traction sheave from 120 to 160 mm)…

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Simulation-Solves-Elevator-Accident-Mystery

Simulation Solves Elevator Accident Mystery

By Dr. Stuart Brown, Dr. Nagi Elabbasi and Dr. Matthew Hancock | September 1, 2015

Multiphysics simulation is used to investigate and determine how an elevator brake failed prematurely. by Dr. Stuart Brown, Dr. Nagi Elabbasi and Dr. Matthew Hancock In 2007, an elevator began moving upward while passengers were exiting, trapping and injuring an occupant. A drum brake intended to hold the elevator stationary failed, resulting in the unexpected…

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