Ljiljana S Peric, Slobodan N Vukosavic

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Majority of contemporary static power converters makes use of three-phase, PWM controlled IGBT inverters. Typical applications include the electrical drives and grid connected converters. In both cases, it is of uttermost importance to obtain a high bandwidth control of the output current. The bandwidth is constrained by the problems of the feedback acquisition. The current ripple at the PWM frequency requires anti-aliasing measures that introduce delays, reduce the stability margin and restrain the bandwidth. We propose the feedback acquisition method which is robust against the ripple and noise, and minimizes delays. We also devise the current controller with control actions which suppress the effects of the delays. Proposed parameter setting procedures meet both the bandwidth requirements and the robustness against the noise and the parameter changes. Experimental verification proves that the proposed current controller achieves the response speed and the robustness against the noise which outperforms the competitive solutions. 


Current control, High-performance control, Signal acquisition, Ac motor drives, Three phase inverter

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ISSN: 2217-5997 (Online)

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