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In the paper the approaches how to develop models of electrotechnical objects using the test example of two-winding transformer are discussed. A comparing of the continuous model created using the description of physical processes and discrete macromodel obtained using the “black box” approach based on field experiment are carried out. It is shown that the model obtained using the “black box” approach...
Winding models based on transmission line theory are commonly used to predict the transient voltage distribution along machine coils. During a fast transient, the highest overvoltages and dielectric stresses usually appear on the first coil. Therefore, most computer models available consider only one coil and approximate the remaining of the winding by means of a constant lumped element. In this paper,...
In this work a computer model for calculating surge distribution in transformer windings is presented. The transformer model is developed using transmission line theory. The capacitance, inductance, resistance and conductance are calculated with simple formulations. The electrical parameters are used for calculating modal parameters in order to represent the winding as a two port network. The model...
In order to realization electronic parts product appearance quality detection control, one kind of processor based on the intelligent knowledge automatic extraction and system intelligence modeling was presented. In the processor, wavelet-fuzzy technique and neural network technique are combined. Uses the fuzzy wavelet extraction image feature, and wavelet function is used as fuzzy membership function...
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