Predictive Time-Frequency Analysis applied on Electric Drive System using Different PWM Techniques

This paper studies a power conversion system supplying a High-Speed Permanent Magnet Motor (HSPMM). This study analysis a dynamic trajectory modelling an electric drive chain with a constant acceleration of the machine to its rated speed. Different phenomena at the same time (subharmonic, and harmonic distortion - THD) specific to the trajectory can be highlighted. Different modulation techniques are addressed to show the relevance of the approach. The method reconciles electrical phenomena with a powerful mechanism of analysis from the Short-Time Fourier Transform (STFT) and the visual representation of the frequency spectrum (spectrogram tool). The Predictive Time-Frequency analysis applied on Electric Drive Systems (PreTiFEDS) offers a powerful tool for engineers and electric conversion system architects when designing the drive system chain.