The use of fractal dimension for purposes of AC motors functional steadiness analysis

The paper deals with two analysis methods which can provide enough information regarding functional steadiness of electric drives using AC motors: frequential analysis method (determine the content of harmonics of the electric specific curves), and fractal analysis method (determine the fractal dimension of specific curves of time variation). The paper shows the complementarity of the two methods and the validity of the new method suggested (fractal analysis/fractal dimension) through the non-contradictory nature concerning the influence of any disturbance on the driving system functional steadiness.