Dynamic analysis of electromechanical converters by means of the wavelet transform

  • Authors:

  • F. Della Torre;G. C. Lazaroiu;S. Leva;A. P. Morando;G. Todeschini

  • Affiliations:

  • Department of Electrical Engineering, Politecnico di Milano, Milano, Italy;Department of Electrical Engineering, Politecnico di Milano, Milano, Italy;Department of Electrical Engineering, Politecnico di Milano, Milano, Italy;Department of Electrical Engineering, Politecnico di Milano, Milano, Italy;Department of Electrical Engineering, Politecnico di Milano, Milano, Italy

  • Venue:
  • MMACTEE'06 Proceedings of the 8th WSEAS international conference on Mathematical methods and computational techniques in electrical engineering
  • Year:
  • 2006

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Abstract

The analysis performed in this paper is related to a four-quadrant ac converter used to drive the motors of a railway locomotive in modern traction systems. The paper numerically analyses the starting transient and the instantaneous harmonic content of the input current. The current obtained by the analytical relationships is then studied by means of the wavelet analysis, putting into evidence the starting transient component and the superimposed noise. It is clearly stated in the work how this methodology can extend to the transient analysis the evaluation of the harmonic content evolution during the transient phase and how any change in the power supply frequency influence the system dynamic. These results cannot be found as well by applying the more traditional Fourier transform.