Analysis of beat phenomenon and chaotic oscillation in resonant switching converters

Interactions between two resonant switching converters are analyzed. In resonant switching converters, not only the beat phenomenon which occurs in PWM (pulse-width-modulated) switching converters is found to occur, but also the phase lock-in and chaotic oscillation is observed. The behavior of a full-wave type resonant switching converter is described. For a half-wave type resonant switching converter, the low-frequency oscillation during the phase lock-in did not occur either in the experiment or in the simulation. It is thought that the reason is that the damping factor in the half-wave type resonant switching converter is much larger than that in the full-wave type