Zeta斩波电路中的复杂行为研究

发布时间：2018-05-06 22:38

本文选题：Zeta斩波电路 + 非线性　；参考：《兰州理工大学》2017年硕士论文

【摘要】：现代社会中,电力电子电路在工农业及军事领域等几乎所有领域被广泛应用。随着半导体技术及电子工业技术的发展,电子电路在工作稳定性方面有着显著的提高。基于此,电路在瞬态响应特征方面,及其电磁兼容性方面的改进,一直是该领域研究工作的重点和难点。共有6种基本斩波电路:升压斩波电路、降压斩波电路、升降压斩波电路、Cuk斩波电路、Sepic斩波电路和Zeta斩波电路。近年来人们深入地研究了前5种斩波电路的动力学性质。研究表明,该类电路中有着包括各种分岔、混沌在内的众多不稳定的非线性动力学行为。所以直流斩波电路中的非线性动力学性质和稳定性研究,对于提高该类电路的各类物理性能有着非常重要的意义。本文在Zeta斩波电路的非线性动力学行为方面进行了相应的探究、分析及验证。Zeta斩波电路是一种基本直流-直流变换电路,能够通过调节占空比控制输出电压。本文介绍了电路的基本结构、2种控制方式及2种建模方法。本文使用了状态空间平均模型对电压反馈控制电路进行建模分析。在一定条件下,电路会产生霍普分岔。本文使用了频闪映射模型和一种简易方法对电流反馈控制电路进行建模分析。在一定条件下,电路会产生倍周期分岔。本文使用MATLAB/Simulink对模型进行了仿真。仿真结果与模型一致,证明了模型的有效性,验证了模型的准确性。本文利用状态空间平均模型对电压反馈系数、控制占空比、负载电阻、电容参数、电感参数对电压反馈电路行为的影响进行了分析。利用频闪映射模型对参考电流、时钟周期对电流反馈电路行为的影响进行了分析。说明了不同参数如何影响电路行为。本文研究了作用在参考电流上的干扰信号对电流反馈电路行为的影响。一定强度的干扰信号会使电路产生间歇现象。本文用模型和理论解释了间歇现象的产生原理及方式。
[Abstract]:In modern society, power electronic circuits are widely used in almost all fields, such as industry, agriculture and military. With the development of semiconductor technology and electronic industry technology, the working stability of electronic circuits has been greatly improved. Based on this, the improvement of the transient response characteristics and the electromagnetic compatibility of the circuit has been the focus and difficulty of the research in this field. There are six basic chopping circuits: boost chopper circuit, step-down chopper circuit, up-down chopper circuit, Zeta chopper circuit and Sepic chopper circuit. In recent years, the dynamic properties of the first five chopping circuits have been deeply studied. It is shown that there are many unstable nonlinear dynamical behaviors in this kind of circuits, including bifurcation and chaos. Therefore, the study of nonlinear dynamic properties and stability in DC chopper circuits is very important to improve the physical properties of DC chopping circuits. In this paper, the nonlinear dynamic behavior of the Zeta chopper circuit is studied. The analysis and verification of the Zeta chopper circuit is a basic DC-DC converter, which can control the output voltage by adjusting the duty cycle. In this paper, two control methods and two modeling methods are introduced. In this paper, the state-space average model is used to model and analyze the voltage feedback control circuit. Under certain conditions, the circuit will produce Hopper bifurcation. In this paper, stroboscopic mapping model and a simple method are used to model and analyze the current feedback control circuit. Under certain conditions, the circuit will produce double period bifurcation. In this paper, MATLAB/Simulink is used to simulate the model. The simulation results are consistent with the model, which proves the validity of the model and verifies the accuracy of the model. In this paper, the effects of voltage feedback coefficient, control duty cycle, load resistance, capacitance parameters and inductance parameters on the behavior of voltage feedback circuits are analyzed by using the state space average model. The effects of reference current and clock cycle on the behavior of current feedback circuit are analyzed by stroboscopic mapping model. It shows how different parameters affect circuit behavior. The effect of interference signal acting on the reference current on the behavior of the current feedback circuit is studied in this paper. A certain intensity of interference signal will cause the circuit to produce intermittent phenomenon. In this paper, the model and theory are used to explain the production principle and mode of intermittent phenomenon.
【学位授予单位】：兰州理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TM46

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