摘要
在某些电路参数条件下,电压控制型Buck变换器会出现混沌,其工作性能恶化。为了有效控制该变换器中的混沌,该文结合状态反馈和参数扰动提出了一种混合控制策略,该策略不依赖变换器的内部电路参数,仅通过调整一个外部可调参数,可将该变换器的混沌状态控制在周期1、2、4、8轨道。通过分析外部可调参数变化时输出电压的分岔图、周期状态的相图、周期状态的电感电流波形、周期状态的输出电压波形和周期状态的开关逻辑图,验证了该混合控制策略的有效性。
The voltage-controlled Buck converter exhibits chaos for some circuit parameters, causing the deterioration of its working performance. A hybrid control strategy is proposed to control chaos effectively in a voltage-controlled Buck converter by combining state feedback with parameter perturbation. This strategy is independent of internal circuit parameters of the converter and controls chaotic state of this converter to the period-1, period-2, period-4, period-8 orbits by adjusting the external adjustable parameter. Validity of the hybrid control strategy is confirmed by analyzing bifurcation diagram of the output voltage with an external adjustable parameter varying, phase portraits, inductor current waveforms, output voltage waveforms and switching logic diagrams of periodic state.
出处
《电子科技大学学报》
EI
CAS
CSCD
北大核心
2016年第2期208-214,共7页
Journal of University of Electronic Science and Technology of China
基金
国家自然科学基金(61473202)
