电流型控制单电感双输出Buck变换器的动力学行为分析

发布时间：2018-10-23 20:50

【摘要】：通过对电流型控制单电感双输出(single-inductor dual-output,SIDO)Buck变换器工作原理的描述,推导了三个电感电流边界,建立了电流型控制SIDO Buck变换器的离散迭代映射模型。采用分岔图和李雅普诺夫指数,分析了以输入电压和输出电压为变化参数的分岔行为。通过稳定性分析,得到了电流型控制SIDO Buck变换器从稳定的周期1工作状态到不稳定工作状态,从电感电流连续导电模式到断续导电模式转移的分界线方程,并利用参数空间映射图对变换器的工作状态域进行了估计。研究结果表明:随着电路参数变化,电流型控制SIDO Buck变换器发生了倍周期分岔和混沌,且运行轨道与三个边界碰撞后产生不同的分岔路由,包括周期数倍增和工作模式转移。最后,建立了电流型控制SIDO Buck变换器的仿真和实验电路,时域仿真和实验结果验证了理论分析的正确性。
[Abstract]:Based on the description of the working principle of current-mode control single inductor double output (single-inductor dual-output,SIDO) Buck converter, three inductor current boundaries are derived, and the discrete iterative mapping model of current-mode control SIDO Buck converter is established. The bifurcation behavior with input voltage and output voltage as variable parameters is analyzed by using bifurcation diagram and Lyapunov exponent. By analyzing the stability of the current-mode controlled SIDO Buck converter, the boundary line equation for the transition from the stable period 1 state to the unstable state and from the inductance current continuous conduction mode to the intermittent conduction mode is obtained. The working state domain of the converter is estimated by using the parameter space map. The results show that with the variation of circuit parameters, the current-mode controlled SIDO Buck converter has a period doubling bifurcation and chaos, and different bifurcation routes occur after the orbit collides with the three boundaries, including the multiplication of the period number and the operation mode transfer. Finally, the simulation and experimental circuits of current-mode controlled SIDO Buck converter are established. The time domain simulation and experimental results verify the correctness of the theoretical analysis.
【作者单位】：西南民族大学电气信息工程学院;西南交通大学电气工程学院;
【基金】：中央高校基本科研业务费专项基金项目(2015NZY QN15)~~
【分类号】：TM46

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