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ERIC Number: EJ1017829
Record Type: Journal
Publication Date: 2013
Pages: 6
Abstractor: ERIC
ISSN: ISSN-0882-7249
VFDs: Are They Electrical Parasites?
Frank, Ned
Facilities Manager, v29 n6 p40-45 Nov-Dec 2013
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.
APPA: Association of Higher Education Facilities Officers. 1643 Prince Street, Alexandria, VA 22314. Tel: 703-684-1446; Fax: 703-543-2772; e-mail:; Web site:
Publication Type: Journal Articles; Reports - Descriptive
Education Level: Higher Education
Audience: N/A
Language: English
Sponsor: N/A
Authoring Institution: N/A
Grant or Contract Numbers: N/A