Quasi-periodic route to chaos in load resonant DC-DC converters

This paper reports first time, both numerically and experimentally, the quasi-periodic, subharmonic and chaotic behavior in a phase shift modulated load resonant converter. The study presented in this paper is restricted to third order series-parallel load resonant converter. From hybrid system point of view, the system consists of four switching surfaces and nine possible modes. After undergoing a Hopf bifurcation of a period-one orbit, quasi-periodic behavior is obtained. Two kinds of route lead to the chaotic operation: a quasi-periodic one and a period doubling scenario.