Transition from Periodicity to Chaos in a PWM-Controlled buck converter with Zad Strategy
Transition from Periodicity to Chaos in a PWM-Controlled buck converter with Zad Strategy
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采用 Zad 策略的 PWM 控制降压转换器从周期性到混沌的转变
DOI：
10.1142/s0218127405014015
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发表时间：
2005
期刊：
影响因子：
--
通讯作者：
G. Olivar
中科院分区：
文献类型：
--
作者：
F. Angulo;E. Fossas;G. Olivar
本文研究了DC-DC降压型功率变换器从周期性到混沌的转变。该变换器通过直接脉宽调制（PWM）来控制，以便将误差动态调节为零。结果表明，该方法具有输出误差小、开关频率固定的鲁棒性。此外，随着与一阶误差动力学相关的常数的减小，出现了一些丰富的动力学。最后，观察到从周期性到混沌的转变。本文描述了这种转换和变换器中的分岔。混沌出现在具有拉伸和折叠机制的系统中。它可以在电感电流的一维庞加莱图中观察到。这个庞加莱图收敛为一个随系统参数ks变化的帐篷图。
The transition from periodicity to chaos in a DC-DC Buck power converter is studied in this paper. The converter is controlled through a direct Pulse Width Modulation (PWM) in order to regulate the error dynamics at zero. Results show robustness with low output error and a fixed switching frequency. Furthermore, some rich dynamics appear as the constant associated with the first-order error dynamics decreases. Finally, a transition from periodicity to chaos is observed. This paper describes this transition and the bifurcations in the converter. Chaos appears in the system with a stretching and folding mechanism. It can be observed in the one-dimensional Poincare map of the inductor current. This Poincare map converges to a tent map with the variation of the system parameter ks.