Seminar Announcement
These events are organized by various sub-sets of the IEEE Toronto Section.
The contact person listed below is the volunteer who has arranged this event.
Please use the e-mail link provided if you have any questions, suggestions,
or concerns.
| Title
|
Impact of Inverter Drives on Form-Wound AC Motor Stator Coil Insulation
|
| Speaker
|
Dr. Edward A. Cherney, IEEE Fellow
DEIS Whitehead Lecturer |
| Date and Time
|
Tuesday, November 20, 2007 6:00 p.m. - 8:00 p.m.
Pizza and Pop at 5:30 p.m. |
| Location
|
ENG LG12, George Vari Centre for Engineering and Computing
(located at the south east corner of Church and Gould Streets)
Ryerson University
245 Church Street, Toronto
map |
| Organizer
|
Dielectrics & Electrical Insulation Chapter |
| Contact
|
Jody Levine, E-mail:
Please confirm your attendance with Jody Levine, DEIS Southern Ontario
Chapter Chair, via email (preferred) or phone 416-345-6339 |
| Abstract
|
Recent advances in power electronics have made it possible to produce pulse width modulated (PWM) voltage converters for 13.8 kV motors. However, insulation failures have occurred when these drives are used for speed control of motors that are designed to operate at power frequency. These failures have created concerns about the negative impact that these drives have on the insulation system of the motors. The stress grading system of the form-wound coil insulation system is considerably affected by the high dV/dt and repetition rate of pulses in the converter voltage waveform. Ground wall insulation is affected by partial discharge and heating and although this process can take a long time to produce a critical failure, the ozone produced can cause deterioration necessitating rewinding the motor. Magnet wire insulation is also affected. In this case, new turn insulation materials have been introduced with nanofillers to provide increased resistance to partial discharges with longer insulation life expected. This presentation will focus on efficiency of the conductive armor slot tape and the semiconductive grading tape in stress grading, and the characteristics of the ground wall tape and nanofilled magnetic wire insulation in resisting partial discharges resulting from PWM converter waveforms.Representatives of North American and international standards committees on cables, transformers, machines, switchgear and lightning arresters will be on-hand for questions. This event is intended to bring people together in a setting more conducive to discussion and debate than the usual formal lecture format. |
| Biography |
Edward (Ed) Cherney received the B.Sc. degree in Honours Physics from the University of Waterloo, a M..Sc. degree in Physics from McMaster University, and the Ph..D. degree in Electrical Engineering from the University of Waterloo, in 1967, 1969 and 1974 respectively. In 1968 he began his career in electrical insulation when he joined Ontario Hydro Research Division (now Kinectrics) in Toronto. While at Ontario Hydro, he became involved in many areas of electrical insulation, developing methods for evaluating and predicting life of electrical insulation materials and insulators. In 1998, he became an Adjunct Professor in the Department of Electrical and Computer Engineering at the University of Waterloo where he teaches a graduate course in high voltage engineering and is involved in a program directed at applying nanodielectrics for high voltage insulation. Ed has been instrumental in the development and successful commercialization of silicone coatings on insulation. Dr. Cherney is a Fellow of the IEEE Power Engineering Society, a member and Whitehead lecturer of the Dielectrics and Electrical Insulation Society, and a Registered Engineer in the Province of Ontario. |
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