Hybrid control approach for the output voltage regulation in buck type DC-DC converter

摘要: Buck converter is modelled as a hybrid automaton for the purpose of designing an appropriate control law to regulate its output voltage. The circuit when operated in continuous current mode pulled into limit cycle, specified by regulation specifications, although switching frequency varies with load. On other hand, under light-load conditions, fixed-frequency cycle discontinuous satisfy criteria. Therefore, controller design generic sense that required met throughout operating range buck converter. problem simplified guard selection and guards, defining discrete states, are derived using simple theoretical approach, imposing certain constraints. Satisfactory operation proposed scheme demonstrated computer simulations laboratory experiments. suitability simplicity over wide disturbances highlighted.