电流控制型Boost变换器的一种新混沌控制策略

发布时间：2019-02-14 10:03

【摘要】：由于开关的高频切换作用,Boost变换器会出现混沌行为,这种非线性行为会导致系统工作性能恶化。因此,基于阻尼器的思想,提出了一种延迟微分反馈法来消除Boost变换器中的混沌行为。首先在控制前变换器数学模型的基础上,研究了变换器处于混沌状态时,它的动力学行为。然后基于施加延迟微分反馈法后变换器的数学模型,通过分析以反馈系数为分岔参数电感电流的分岔图,控制后的庞加莱截面、相图、电感电流波形、输出电压波形和开关逻辑图,研究了该策略的控制效果。结果表明该策略不需要预先确定期望的目标轨道,只需要通过调整一个外部反馈系数就能够将变换器的混沌状态控制在稳定的周期1轨道,且该策略与变换器的内部电路参数无关。该混沌控制策略为电力电子电路中混沌现象的消除提供了一条新思路。
[Abstract]:The chaotic behavior of Boost converter will occur due to the switching effect of high frequency, which will lead to the deterioration of the system performance. Therefore, based on the idea of dampers, a delayed differential feedback method is proposed to eliminate chaos in Boost converters. Based on the mathematical model of the converter before control, the dynamic behavior of the converter in chaotic state is studied. Then, based on the mathematical model of the converter after applying delay differential feedback method, by analyzing the bifurcation diagram of inductor current with feedback coefficient as bifurcation parameter, the controlled Poincare section, phase diagram, inductor current waveform are analyzed. The output voltage waveform and switch logic diagram are used to study the control effect of the strategy. The results show that the proposed strategy does not need to determine the desired target orbit in advance, but only needs to adjust an external feedback coefficient to control the chaotic state of the converter in a stable periodic 1 orbit. The strategy is independent of the internal circuit parameters of the converter. The chaos control strategy provides a new idea for eliminating chaos in power electronic circuits.
【作者单位】：内蒙古工业大学(金川校区)电力学院;
【基金】：内蒙古工业大学校基金(ZD201520) 内蒙古自治区自然科学基金(2017BS0603)
【分类号】：TM46

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