Title :
Stability of multi-phase synchronization in parallel DC-DC boost converters with WTA switching
Author :
Ohata, Takuma ; Saito, Takashi
Author_Institution :
Dept. of Electr. & Electron. Eng., HOSEI Univ., Koganei, Japan
Abstract :
This paper studies nonlinear dynamics and stabilization problem of parallel dc-dc boost converters with the winner-take-all (WTA) switching. The WTA switching can automatically realize multi-phase synchronous state that is suitable for current sharing and ripple reduction. Based on several analysis results of single converters, we analyze the dynamics of the parallel converters. Applying the piecewise linear modeling and mapping procedure, we have clarified that, as parameters vary, the multi-phase synchronous state becomes unstable and chaotic phenomena appear. We have noticed that ripple of unstable synchronous state is much smaller than that of the chaotic state. We then present a loser-take-all impulsive switching method that can stabilize the synchronous state.
Keywords :
DC-DC power convertors; machine control; nonlinear control systems; nonlinear dynamical systems; piecewise linear techniques; power system stability; switching convertors; synchronisation; WTA switching; chaotic phenomena; current sharing; loser-take-all impulsive switching method; mapping procedure; multiphase synchronization stability; nonlinear dynamics; parallel DC-DC boost converter dynamics; piecewise linear modeling; ripple reduction; stabilization problem; unstable phenomena; winner-take-all; Bifurcation; Chaos; Circuit stability; Orbits; Stability analysis; Switches; Transient analysis; Bifurcation; Chaos; DC-DC power converters; Nonlinear dynamical systems; Phase control; Phase shifters; Stability; Switching circuits; Switching converters;
Conference_Titel :
Industrial Electronics Society, IECON 2013 - 39th Annual Conference of the IEEE
Conference_Location :
Vienna
DOI :
10.1109/IECON.2013.6700540
