Continuing Education
Elevator Drives, Power Quality and Energy Savings
The basics of variable-frequency drives, their advantages and how harmonics are created by Jonathan Bullick and Brad Wilkinson Introduction During the past 25 years, the use of AC variable-frequency drives...
Variable-Frequency Drive Systems for Hydraulic Elevators
An overview of the flexibility and various types of energy-efficient hydraulic drives An Overview Elevators with hydraulic drives are flexible by definition. Almost infinite configurations of elevator and cabin designs...
Rope Dynamics
This study explores how transient vibrations arise and why rope vibrations occur. by Phil Andrew, MSc, MPhil and Stefan Kaczmarczyk, PhD Rope vibrations in an elevator system usually result in...
The Conflicting Roles of the Elevator Safety Code, LEED and ADA in Elevator Renovation
This article explores the issues related to the affects safety codes have on elevator renovations. The lifespan of a cab interior is shorter than that of the rest of the ...
Electrically Assisted Braking Using DC Hoist Motors
This article explores some of the issues related to braking performance on the emergency stopping of elevators. by Nick Marchitto This article explores some of the issues related to braking...
The Application of Electromechanical Spring-Set Brakes in MRL Machines
"This article discusses some of the basic components and operation of DC electromagnetic spring-applied brakes." by Jonathan Bullick Value: 1 contact hour (0.1 CEU) This article is part of ELEVATOR...
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