NDLI: Analysis of overvoltage on motor winding insulation fed by PWM pulses

Content Provider	IEEE Xplore Digital Library
Author	Włodek, R. Roehrich, J. Zydroń, P.
Copyright Year	2010
Description	Author affiliation: AGH University of Science and Technology Department of Electrical and Power Engineering Kraków, Poland (Włodek, R.; Roehrich, J.; Zydroń, P.)
Abstract	The introduction of Adjustable/Variable Speed Drives (ASD/VSD) caused new exposures for motor insulation systems. Particularly the application of fast transistor switches and pulse-width modulated (PWM) train of pulses may result in the overvoltages on motor insulation. The mechanism of partial discharges in insulating system has been widely investigated for sinusoidal voltage shape. However, fast rising PWM pulses may result in another mechanism of partial discharges initiation and further evolution and thus the degradation of insulating material. The paper discuses the influence of PWM pulses shape on expected exposures on electric motor insulation. For this aim the voltage pulse shape may be represented generally as the trapezoidal one. Voltage pulse of such a shape is propagated through feeding cable to the motor insulation input. As the effect the time transient voltage response arises at this point and acts on the motor insulating system. The shape and value of such an overvoltage depend on the cable parameters, the equivalent impedance of the winding, and on the parameters of feeding voltage shape, i.e. the slope of voltage increase and decrease.
Starting Page	584
Ending Page	587
File Size	268617
Page Count	4
File Format	PDF
ISBN	9781424482832
e-ISBN	9781424482863
DOI	10.1109/ICHVE.2010.5640771
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-10-11
Publisher Place	USA
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Induction motors Shape Windings Pulse width modulation Cable insulation Voltage control
Content Type	Text
Resource Type	Article

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