VFDs: Are They Electrical Parasites?

Autor/in	Frank, Ned
Titel	VFDs: Are They Electrical Parasites?
Quelle	In: Facilities Manager, 29 (2013) 6, S.40-45 (6 Seiten) PDF als Volltext Verfügbarkeit
Sprache	englisch
Dokumenttyp	gedruckt; online; Zeitschriftenaufsatz
ISSN	0882-7249
Schlagwörter	Best Practices; Facilities Management; Educational Facilities; Electronic Equipment; Use Studies; Equipment Utilization; Mechanical Skills; Power Technology + Suchen Sie Ihr Suchwort? Facility Management; Bildungsstätte; Elektronisches Gerät; Benutzerschulung; Antriebstechnik
Abstract	Variable Frequency Drives (VFDs) are electronic speed controllers used mainly to modulate and reduce the overall speed and power consumption of an electrical motor. They can be used as soft starters for equipment that has a large rotational mass, thus reducing belt ware and large electrical peaks when starting large pieces of equipment. VFDs have other options that are useful like capturing a reverse spinning loads prior to start up, and they can also be used to over speed a motor for specific applications such as fan walls. This article describes some of the common issues a facility will encounter with this technology. These issues include loop grounds, motor stator problems, motor bearing problems, and shaft grounding. The article advises that a checklist be developed to ensure that all the elements of the application are being looked at and that best practices are being followed. (ERIC).
Anmerkungen	APPA: Association of Higher Education Facilities Officers. 1643 Prince Street, Alexandria, VA 22314. Tel: 703-684-1446; Fax: 703-543-2772; e-mail: appa@appa.org; Web site: http://www.appa.org
Erfasst von	ERIC (Education Resources Information Center), Washington, DC
Update	2017/4/10