The application of vector control to PWM drives

  • Dirk Schaper

    Student thesis: Master's Thesis


    This thesis describes the results of an investigation into the performance and behaviour of inverter fed induction motor drive systems, where the main aim of the investigation was to produce a means of simulation, whereby the transient response of drives could be studied in detail.

    It is shown that a useful simulation of an inverter drive can be achieved by means of a standard software package and a Personal Computer (PC). The thesis demonstrates that once the mathematical model for the drive system is established, a software package called MATLAB can be employed to study the performance of such electrical drive systems. Two types of induction motor drives were investigated in detail by means of this package. The first drive consisted of an open loop Pulse Width Modulated (PWM) inverter induction motor drive system, whereas the second was a PWM Vector Control System.

    The thesis also contains the results of experimental investigations into the performance of the drive system, where the control strategies were implemented by means of a transputer. The experimental results demonstrate good correlation with the simulated results.

    The thesis also contains the design and development of a flux trajectory observation system which may be employed to study the behaviour of the drive system, when supplied with modulated voltage waveforms which contain harmonics.
    Date of AwardJun 1993
    Original languageEnglish

    Cite this