Steel-wire ropes and sheaves are examined. by Dr.-Ing. Wolfram Vogel and Lothar Sieber Steel-wire ropes have an important interface in traction elevators. The ropes influence the dimensioning of the rope drive, as well as costs, energy efficiency, used shaft space, production, installation, diameters and maintenance. Smaller rope diameters decrease the diameters of the traction and…
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Various aspects of hoist-rope tension, stretch and measurement are examined by Mike Barnes and Martin Rhiner Over the years, industry professionals have sometimes chosen to avoid performing the basic maintenance routine of rope-load equalization altogether. This happens for many reasons: the prohibitive expense of having a professional crew correctly perform this tedious, exacting task; the…
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The country’s general economy, employment rates and construction industry are covered. Over the past few years, Elevator World, Inc. has studied the trends of international markets and how they have been impacted by the global recession. The goal of this report is to provide a general understanding of Spain and how its economy and certain…
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Furgiuele discusses the company’s environ-mental initiatives and her vision Cara Furgiuele, project technician and architect for Snapcab by Bostock, always aims for constant improvement. Whether it involves helping customers lower their energy usage through the use of SnapCab elevator products, focusing on lean manufacturing or helping the local community through volunteer work, Furgiuele embraces the…
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An overview of the National Elevator Industry Educational Program’s (NEIEP) history On March 23, 1967, the National Elevator Manufacturing Industry, Inc. (NEMI), now the National Elevator Industry, Inc. (NEII) and the International Union of Elevator Constructors (IUEC) signed a new Standard Agreement. Article 19 of the agreement established an “Educational Fund”: “. . . for…
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Partnership announced at a training event in April in Manama, Bahrain. KLEEMANN announced on April 24 its exclusive partnership with Middle East Elevators during a training event at the Diplomat Radisson Blu Hotel, Residence and Spa in Manama, Bahrain. The announcement was made in the presence of consultants, architects and contractors. The first day began…
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Headquartered in São Paulo, this company celebrates its experience manufacturing electronic controllers and components. Brazilian company Infolev commemorated its 20th birthday in December 2011 with a month full of celebrations. The company manufactures electronic controllers and related components. In addition to the parties organized in São Paulo, where the company’s headquarters are located, there were…
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Members gathered in March to discuss industry strategies and topics. by Harold F. Potts, Jr. and Bruce Moore The 2012 Elevator Contractors of America (ECA) Annual Meeting was held on March 4-6 at the Gasparilla Inn in Boca Grande, Florida. ECA welcomed a record number of members to this year’s meeting. Members from around the…
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Allocations with genetic algorithms of its destination-control system are covered by Marja-Liisa Siikonen, Janne Sorsa and Tuomas Susi In the early 1970s, Dr. G.D. Closs showed that with early destination call information, the assignment of calls to elevators could be made more efficiently.[1] Technology at that time was not ready for the real application of…
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Theoretical analyses and experimental results of dual PWM converters are examined. by Han Shuang, Zheng Jiong, Luo Zhiqun and Wan Jianru Dual pulse-width modulation (PWM) AC drives are one of the most energy-efficient elevator technologies. Here, we will focus on the coordinated control of dual PWM converters integrating elevator drives with energy feedback. Theoretical analyses…
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