Designing a hysteresis band in a boost flyback converter. (15th January 2021) - Muñoz, Juan-Guillermo
Highlights: Hysteretic control of a boost flyback converter produces a stable period 1 orbit. The resulting orbit is highly robust to disturbances and control design parameters. Even operation far from the control design criteria achieves adequate behavior. Abstract: In this paper, we present a method to control a boost flyback converter using a hysteresis band, which is designed using information of the magnetization current and a proportional integral control action of the error. The stability of the periodic orbit is proven via the monodromy matrix, and the robustness, after the first tests of the disturbance rejection, is proven using bifurcation diagrams. When the period-1 orbit losses the stability, it disappears and gives rise to other period-1 orbit with different topological sequence. In all cases that we tested, the system always presented a good performance in a period-1 orbit with very low error.