Bifurcation Phenomena of Voltage Regulated Forward Converter in CCM and DCM Mode

Abstract—This paper focus on the bifurcation behaviors of voltage regulated forward converter. Meanwhile it builds a mathematical model based on voltage closed-loop control system, and discusses load resistance that makes system produce bifurcation phenomena. The bifurcation mechanism indicates that with the value of load resistance increases, voltage regulated forward converter output voltage operates from stable period-1 state to period doubling bifurcation till intermittency chaos. When the resistance values continue to increase, locking cycle six and the period doubling bifurcation phenomena emerge again, in the end the output voltage enter into stable one periodic orbit. The chaos phenomenon is stabilized by extra voltage compensation. The simulation result proves that the accuracy of theoretical analysis. Keywords-Forward converter; CCM; DCM; bifurcation; voltage regulate I