Investigation of digital current control based on zero average current error concept

Hamdan Daniyal

    Research output: ThesisDoctoral Thesis

    303 Downloads (Pure)


    Digital current control technique has quickly become one of the active research areas in power electronics thanks to the rapid increasing of digital platform processing power as well as the decreasing of its cost. There is a lot of new digital current control technique developed in the past 20 years; each has its own strength and weaknesses. The focus of the thesis is to investigate the possibilities of a new all digital current control technique based on Zero Average Current Error (ZACE) concept. ZACE concept introduced back in 1993 as a simple and effective idea of controlling current by choosing the right instance to switch with the intention to deliver constant switching frequency without relying much on system parameters. There are variations of current control techniques under ZACE concept, but Polarized Ramptime Current Control is the most popular since it provides very satisfactory performance. Therefore, Polarized Ramptime Current Control is chosen as the ideal basis for the new all digital current control technique. The thesis presents the comparison test of Polarized Ramptime Current Control with the linear PI Current Control and the robust Hysteresis Current Control. The prototype for the test is an APF that provides a challenging platform for the three current controls. The prototype is presented in detail; therefore it has high repeatability value for any interested researchers. The results are critically analysed and discussed. The advantages and disadvantages of every current control are presented.
    Original languageEnglish
    QualificationDoctor of Philosophy
    Publication statusUnpublished - 2011


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