Design of a Combined Table-Based Regulator for Zero-Current-Switching Quasi-Resonant Boost Converter

An electromagnetic processes analysis in a boost zero-current-switching quasi-resonant converter is performed by dint of the generalized method of commutation processes calculation which resulting in a set of analytical time-domain equations for applied voltages and circulating currents in a steady-state mode. The dependencies for both duration and period of control pulses under simultaneously variation of voltage conversion ratio and load impedance are obtained by dint of numeric simulation, which allows filling the content of lookup tables for linearization of ZCS-QRC control characteristics. A closed-loop control system based on two lookup tables operating as a voltage regulator/stabilizer is assembled and validated in MATLAB Simulink environment. It is proven and also visually evaluable from timing diagrams that proposed design of control system keeps a steady-state stability and coarse adequacy of converter operation, while installation a conventional PID-controller connected in parallel with lookup tables eliminates the static regulation error and significantly optimize the transient process rate. As a result, a combined table-based regulator/stabilizer for non-linear dc-dc converter with a good stability in both the wide regulation and the load impedance range is designed and verified, and a workable design flow is shown.