Digital-control current regulator

We performed synthesis of digital-control current regulator using criterion of transient end-time and zero statistic error. Regulator works for active-inductive error. Synthesis of regulator is based on linear approximation of regulation object with applied z -transformation. We found margin stability of synthesized system by change of amplification coefficient and in phase. To evaluate accuracy of obtained results we modeled digital current regulator in software suite VisSim considering non-linearity such as “constraint”. Modeling revealed that at small perturbations transient process in accordance with analytical results ends within one sampling period. However grand disturbances are accompanied with long-term transient processes determined by the fact that integration operation included in correction filter computational algorithm continuously accumulates error that attains immense value. At restoration of linear mode, integrator transition to the state corresponding to this mode requires significant amount of time. We offer control algorithm including software constraint of control error maximum value, providing transient process end if target current value is achieved for one stroke and at heavy currents.