基于转子磁场定向的三电平控制系统的研究

发布时间：2018-01-10 04:20

本文关键词：基于转子磁场定向的三电平控制系统的研究　出处：《东北大学》2014年硕士论文　论文类型：学位论文

【摘要】：本文以感应电机为控制对象,以二极管箝位式三电平拓扑结构为平台,研究了三电平中点算法及感应电机基于转子磁场定向的矢量控制。从理论分析,仿真验证和实验研究对中点算法及感应电机的矢量控制进行了深入研究。首先,本文介绍了二极管箝位型三电平逆变器的拓扑结构和三电平SVPWM算法的原理,通过60度坐标系,对三电平SVPWM算法进行了简化,Simulink中的仿真结果验证了改进后的三电平SVPWM算法的正确性。之后,分析了几种基本电压矢量对中点电位的影响,并针对基本电压矢量作用下产生的中点电位偏移这一二极管箝位型三电平逆变器的固有问题,本文进行了深入的讨论,详细分析了其产生的本质原因,并给出了中点电位平衡法对系统进行改进。随后在中点电位控制的系统Simulink仿真方面,仿真结果表明了所提出的控制方法能够很好地解决这一问题。然后,引入了感应电机在三相静止坐标系下的数学模型,推导了感应电机基于转子磁场定向的同步坐标系下的数学模型,进而介绍了转子磁场定向和定子磁场定向的基本原理。随后介绍了用Matlab/Simulink仿真软件搭建的基于转子磁场定向的异步电机仿真模型；基于仿真模型,进行了大量仿真实验,结果表明：矢量控制系统具有很好的动态响应和稳态精度。最后,在以TMS320F28335和EPM570为控制核心的硬件控制电路,二极管箝位式三电平逆变器的实验平台上,对改进的三电平SVPWM算法进行了实验,实验结果验证了这种算法的正确性。在此基础上,进行了中点算法实验,实验结果证明了改进的中点算法对中点调节有很好的效果,并在中高压大功率变频器实验环境下对三电平逆变器的矢量控制系统进行了实验研究,实验结果表明：控制系统实现了中点控制,异步电机的解耦控制,具有良好的动态响应。在文章的最后对下一步的工作研究提出了建议和展望。
[Abstract]:Based on the induction motor as a control object, the diode clamped three level topology as a platform, on the three level neutral point algorithm and induction motor rotor field oriented vector control. Based on the theoretical analysis, simulation and Experimental Research on vector control of induction motor and the midpoint algorithm is studied. Firstly, this paper introduces the principle of topology of diode clamped three level inverter and three level SVPWM algorithm, by 60 coordinate system and three level SVPWM algorithm was simplified, Simulink simulation results verify the correctness of three level improved SVPWM algorithm. After the analysis of the influence of several kinds of basic voltage vectors on neutral point potential the inherent problem of neutral point voltage for the basic voltage vector generated by the diode clamped three level inverter, this paper makes a deep discussion, The essence of detailed analysis of its causes, and gives the neutral point potential balance method to improve the system. Then the system simulation of Simulink neutral point potential control, the simulation results show that the proposed control method can solve this problem. Then, introducing the mathematical model of induction motor in the three-phase static coordinate system the derivation of the mathematical model of induction motor rotor flux oriented synchronous coordinate system based on, and then introduces the basic principle of rotor field orientation and stator flux orientation. Then introduced the use of Matlab/Simulink simulation software to build the simulation model of induction motor based on rotor flux orientation; based on the simulation model, the simulation experiment results. Show that the vector control system has good dynamic response and steady state accuracy. Finally, based on TMS320F28335 and EPM570 as the core of hardware control Circuit experiment platform of diode clamped three level inverter on the three level of the improved SVPWM algorithm was studied, the experimental results verify the correctness of the algorithm. On this basis, the midpoint algorithm experiment, experimental results show that the improved algorithm has a good effect on the midpoint of regulation, and in in the experimental environment of high voltage power converter of three level inverter vector control system was studied. The experimental results show that the control system can control the midpoint of asynchronous motor, decoupling control, good dynamic response. At the end of the next step of the research work and put forward some recommendations and prospects.

【学位授予单位】：东北大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM464;TM921.5

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