Title :
Novel stress grading systems for converter-fed motors
Author :
Wheeler, J.C.G. ; Gully, A.M. ; Baker, A.E. ; Perrot, F.A.
Abstract :
This paper describes an improved stress-grading system for converter-fed motors using conventional materials. For converter drives, the system was found to restore much of the stress-grading performance found with a single layer of tape on the surface of endwindings in 50/60 Hz machines. The paper also describes a simple laboratory pulse generator used to power samples when making voltage measurements along the surface
Keywords :
corona; finite element analysis; machine windings; power convertors; converter-fed motors; corona shield; end windings; finite element analysis; impulse voltages; steep-fronted voltages; stress grading systems; Conducting materials; Couplings; Frequency conversion; Insulation; Partial discharges; Stress; Surface discharges; System testing; Temperature; Voltage;
Journal_Title :
Electrical Insulation Magazine, IEEE
DOI :
10.1109/MEI.2007.288457
