Comparative study on the dynamic behaviors of SRD operated at two control modes

In this paper, dynamic behaviors in a three phase Switched Reluctance Drive (SRD) operated respectively at digital and analog control modes are studied comparatively. By making use of Fourier Series, mathematic description of the system under proportional-integral (PI) compensation is presented based on the equivalent linear inductance model. After giving the waveforms of system output-variables in the continuous time domain, the bifurcation diagrams are derived in terms of proportional compensation coefficient. Lastly, the bifurcation characteristics of digitally controlled SRD are discussed along with its analog controlled counterpart to highlight the diversities between digital and analog control modes.