TY - GEN
T1 - Effectiveness of Stress Control Coatings in Medium Voltage Form Wound Coil Ends under Fast Rise Time Pulses and Contamination
AU - Espino-Cortes, F. P.
AU - Jayaram, Shesha H.
AU - Chemey, Edward A.
PY - 2005
Y1 - 2005
N2 - The paper discusses the effectiveness of stress control coatings on the ends of 4 kV motor coils under fast rise time pulses that arise from PWM drives. The analysis of the stress relief is done using a transient finite element method and the results are compared to experimental measurements. Currently adopted stress control coatings do not effectively grade the electric stress arising from fast rise time pulses from PWM inverter drives which easily reaches the partial discharge threshold on the ground wall insulation surface of the form wound coils. Electric field enhancement is shown to be considerably greater under polluted conditions. In this work, changes to the properties of the coatings are suggested as a solution to improve the effectiveness of stress control coatings on form wound coils in motors connected to inverter fed drives.
AB - The paper discusses the effectiveness of stress control coatings on the ends of 4 kV motor coils under fast rise time pulses that arise from PWM drives. The analysis of the stress relief is done using a transient finite element method and the results are compared to experimental measurements. Currently adopted stress control coatings do not effectively grade the electric stress arising from fast rise time pulses from PWM inverter drives which easily reaches the partial discharge threshold on the ground wall insulation surface of the form wound coils. Electric field enhancement is shown to be considerably greater under polluted conditions. In this work, changes to the properties of the coatings are suggested as a solution to improve the effectiveness of stress control coatings on form wound coils in motors connected to inverter fed drives.
KW - Fast rise time pulses
KW - Field dependent conductivity
KW - Form wound stator coils
KW - Inverterfed drive motors
KW - Seniconductive slot coating
KW - Stress grading coating
KW - Varistor material
UR - http://www.scopus.com/inward/record.url?scp=33846217019&partnerID=8YFLogxK
U2 - 10.1109/EEIC.2005.1566282
DO - 10.1109/EEIC.2005.1566282
M3 - Contribución a la conferencia
AN - SCOPUS:33846217019
SN - 0780391454
SN - 9780780391451
T3 - Proceedings - Electrical Insulation Conference and Electrical Manufacturing Expo, 2005
SP - 167
EP - 170
BT - Proceedings - Electrical Insulation Conference and Electrical Manufacturing Expo, 2005
T2 - Electrical Insulation Conference and Electrical Manufacturing Expo, 2005
Y2 - 23 October 2005 through 26 October 2005
ER -