BondGraphs intheDesign ofAdaptive Passivity- BasedControllers forDC/DCPowerConverters

Inthis paper anewapproach isproposed forthe Thispaperisorganized asfollows. Section IIshowsthe design ofadaptive passive dynamical compensators regulating the procedure usedtoobtain afeedback passivity-based controller output loadvoltage inpulse-width-modulation (PWM)DC/DC forthebuckandthebuck-boost converters. Insection IIIa powerconverters. Theapproach isbasedonthebondgraph description ofthesystem. Forthedesign ofthepassivity-based isshown controller, adamping injection ontheerror dynamic bondgraphassuming aconstant butunknownresistive load. Section IV isperformed wheredissipation isaddedinordertoachieve contains theconclusions andsuggestions forfurther research in asymptotic stability. Bicausality isusedtodetermine thesteadythisarea. Simulation results areincluded throughout the state valueofthedesire output variable. Thiscontroller isthen presentation. modified togenerate anadaptive feedback scheme. Thenon- minimumphase nature oftheaverage output voltage variable is II.PASSIVITY-BASED REGULATION OFDCTODCPOWER demonstrated byagraphical analysis performed directly onthe CONVERTES BONDGRAPHS average bondgraphoftheconverter. Theperformance ofthe proposed controller ofeachconverter istested through computer Inthis sontheprcedure usedot obtapsiity-based simulations. Theresults obtained inthepaper canbeextended controllers forthebuckandbuck-boost converters isshown. without anydifriculty toothersystems represented viabond Thisprocedure wasfully explained fortheboostconverter in graphs. ~~~~~~~Fig. 2.Buckconverter bondgraph model.