双三相电机矢量控制及容错控制策略研究

发布时间：2018-01-18 11:13

本文关键词：双三相电机矢量控制及容错控制策略研究　出处：《浙江大学》2014年硕士论文　论文类型：学位论文

【摘要】：本文研究的双三相永磁同步电机同时具有永磁电机与双三相电机的优点。双三相永磁同步电机是一个非线性,强耦合、多变量的系统。本文首先采用空间矢量解耦方法,建立了同步旋转坐标系下的电机数学模型,采用isd=0进行磁场定向控制。针对矢量空间解耦技术对zl-z2子平面谐波电流分量控制的不足,本文采用比例谐振控制器对该平面具有较大幅值的电流谐波分量进行直接而有效的控制,并给出了相应的SVPWM方法,同时实现a-β子平面和zl-z2子平面的优化控制策略,有效地抑制了定子谐波电流,减小了系统损耗。同时,基于双三相电机的绕组结构特点,提出了基于双同步坐标变换的双三相电机矢量控制策略,采用解耦补偿的方法使两套绕组分别解耦独立控制。给出两种电流控制策略消除因分开控制引起的绕组间不平衡电流。本文还推导分析了以上两种矢量控制之间的内在联系,两者最大区别在于采用双同步坐标变换的矢量控制在控制原理上对与机电能量转换无关的zl-z2子平面电流谐波分量有直接有效的控制,仿真结果验证以上结论。本文分别从定子绕组磁势不变和用改进旋转坐标变换实现不对称电机的解耦控制两个角度出发,介绍了多双三相电机在不对称运行时的两种容错控制方法。重点研究了不对称运行时的新型坐标变换方法,提出一种将不对称的系统等效为对称系统的等效坐标变换,实现不对称双三相电机的解耦控制,获得与直流他励电动机相似的控制性能。最后,仿真研究表明,该策略能够有效的减小缺相运行时电磁转矩的脉动,实现了缺相运行时磁场定向解耦控制。最后,设计了基于TI公司的TMS320LF2812数字信号处理器的双三相永磁电机实验平台,对其硬件和软件系统分别做了介绍。并对本文的研究内容进行了实验验证。
[Abstract]:The double three phase permanent magnet synchronous motor studied in this paper has the advantages of both the permanent magnet motor and the double three phase motor. The double three phase permanent magnet synchronous motor is a nonlinear and strongly coupled motor. In this paper, the mathematical model of motor in synchronous rotating coordinate system is established by using the method of space vector decoupling. In this paper, isd=0 is used to control the magnetic field orientation and the vector space decoupling technique is used to control the harmonic current component of the zl-z2 subplane. In this paper, the proportional resonance controller is used to directly and effectively control the current harmonic component with large amplitude in the plane, and the corresponding SVPWM method is given. The optimal control strategy of a- 尾 subplane and zl-z2 subplane is realized at the same time, which effectively restrains the stator harmonic current and reduces the system loss. At the same time, based on the characteristics of the winding structure of the two-phase motor. A vector control strategy for dual three phase motor based on double synchronous coordinate transformation is proposed. The decoupling compensation method is used to separate the two sets of windings separately and independently. Two current control strategies are given to eliminate the unbalanced current between the windings caused by the separate control. The paper also deduces and analyzes the relationship between the two kinds of vector control. The inner link. The biggest difference between the two is that the vector control with double synchronous coordinate transformation has direct and effective control on the harmonic component of zl-z2 subplane current which is independent of electromechanical energy conversion in the control principle. The simulation results verify the above conclusions. In this paper, the stator winding magnetic potential is invariant and the decoupling control of asymmetric motor is realized by improved rotation coordinate transformation. This paper introduces two fault-tolerant control methods for multi-double three-phase motor in asymmetric operation, and focuses on the new coordinate transformation method in asymmetric operation. This paper presents an equivalent coordinate transformation from an asymmetric system to a symmetric system, and realizes decoupling control of asymmetric two-three-phase motor. The control performance is similar to that of DC shunt motor. Finally, the simulation results show that the decoupling control is similar to that of DC shunt motor. This strategy can effectively reduce the ripple of electromagnetic torque in the absence of phase, and realize the field-oriented decoupling control in the absence of phase. Finally, a dual-three-phase permanent magnet motor experimental platform based on TI's TMS320LF2812 digital signal processor is designed. The hardware and software system are introduced, and the research contents of this paper are verified by experiments.
【学位授予单位】：浙江大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TM341

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