Frequency and Time Domain Characterization of Transient Voltages through Low-Voltage Motor Stator Coils Fed with Inverter Pulses

The application of inverter-fed drives provides additional electrical stresses in induction motors' insulation system. This is due to steep-fronted voltage pulses responsible for high overvoltages at the motor's input terminals and to an uneven voltage distribution along the windings. This...

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Bibliographic Details
Published in:Electric power components and systems 2007-06, Vol.35 (6), p.715-731
Main Authors: Martínez-Tarifa, J. M., Sanz-Feito, J., Amarís-Duarte, H.
Format: Article
Language:English
Subjects:
frequency response analysis
induction motor drives
pulse width modulation
random wound coils
voltage distribution prediction
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Summary:The application of inverter-fed drives provides additional electrical stresses in induction motors' insulation system. This is due to steep-fronted voltage pulses responsible for high overvoltages at the motor's input terminals and to an uneven voltage distribution along the windings. This article presents a model for the analysis and characterization of the internal voltage distribution and complex impedance in random wound coils. Experimental and theoretical results are presented using frequency response analysis (FRA) and model effectiveness using different approximations is studied. Finally, the frequency domain characterization will allow a time domain analysis, by means of inverse fast Fourier transform (iFFT).
ISSN:1532-5008
1532-5016
DOI:10.1080/15325000601139708