Superior transient and stability performance of voltage regulation by battery-fed bidirectional converter for supporting various operational modes of PMDC machine
by Satyajit Saha; Pritam Kumar Gayen
International Journal of Power Electronics (IJPELEC), Vol. 16, No. 2, 2022

Abstract: This paper presents a systematic procedure to design a voltage controller for achieving superior dynamic performance of a battery-fed bidirectional converter for supporting both motoring and regenerative operations of a permanent magnet direct current (PMDC) machine. In this respect, derivation of a small signal model of overall system is given. Next, the condition for absolute stability is calculated from the model on the basis of the Routh-Hurwitz criterion. Then, gains of the proportional-integral (PI) controller have been tuned using the Ziegler-Nichols tuning chart as per the conventional approach. But, the calculated gains from Ziegler-Nichols tuning chart do not provide satisfactory dynamic performance and sound stability margin under variable voltage conditions. Thus, performance of voltage regulation is deeply investigated and redesign of the voltage controller is emphasised through further mathematical analysis for achieving both superior dynamic performance and significantly stronger stability margin. Superiority of this proposed approach is verified in MATLAB-SIMULINK software based modelling of the physical system and also, in experimental platform.

Online publication date: Mon, 08-Aug-2022

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