【作者】 尚敬；

【导师】 胡基士；

【作者基本信息】 西南交通大学 ， 电力系统及其自动化， 2003， 硕士

【摘要】 本文对交流调速系统控制方法中的磁场定向控制做了深入研究。对一个改进转差频率观测器的间接磁场定向控制系统，利用MATLAB软件对整个控制系统进行仿真，并通过和实际实验结果相对比，得出该控制系统具有较高的可靠性。论文对实验中出现的主要问题进行了分析，并提出了解决方法。 首先，论文给出了一个异步电机的空间矢量数学模型，分析了在仿真时利用这个数学模型建模的优点。针对高性能交流调速控制方法中普遍需要电机参数的现象，论文给出了一种异步电机参数离线辨识方法，通过把仿真结果与传统实验方法测得的数据对比可以看出，该方法较为简单实用。 接着，对现有的脉宽调制技术进行了总体介绍，着重论述了空间电压矢量脉宽调制技术。分析了空间电压矢量脉宽调制技术的同步调制和异步调制的异同，并给出一个异步调制实现的详细步骤。 然后，论文详细分析了磁场定向控制方法，比较了直接磁场定向控制和间接磁场定向控制的异同。对一个改进转差频率观测器的间接磁场定向控制进行MATLAB仿真，并验证了该系统的解耦性能。 论文设计了一个基于高速数字信号处理器(DSP)的磁场定向控制系统硬件平台，并利用这个硬件平台完成实验。文中给出了系统软件设计详细流程图，并对实验结果进行了分析。 最后，文章对两种无速度传感器磁场定向控制系统的速度观测方法，即模型参考自适应法和推广的卡尔曼滤波算法进行了对比研究。更多还原

【Abstract】 This document presents research results for improving speed control algorithms for field oriented control (FOC) induction machine drives. In addition the improvement of an IFOC is attempted by using an improved sliding observer, Simulation based MATLAB and experiment present that this control system is reliability and accuracy. The important problems during experiment are analyzed in detail, and the ways of solving these problems are introduced.First of all, the maths module of induction motor based on Space Vector is introduced. The paper analyzed the merit when used the module if we simulate in MATLAB software. Because many parameters of induction motor are needed in high performance drives methods, this paper presents a way by which these parameters are got off-line. After analyzing the difference between the simulation result and the experiment result, the way is simple and reliable.Secondly, all of PWM ways are introduced, and the SVPWM is speciallay introduced. The paper analyzes the algorithm of the SVPWM with both synchronous modulation and asynchronous modulation, and gives an example of asynchronous modulation.Then, the field oriented control method is completly presented. The paper compare to the control performance between direct oriented control (FOC) and indirect oriented control (IFOC). In addition the improvement of an IFOC is attempted by using an improved sliding observer, Simulation based MATLAB is done, and prove that the system is controlled independently.The hardware structure of FOC system based on DSP is introduced. The software design flow is given in detail. The experiment result is analyzed.Finally, the paper proposes a comparison between the performances of a model reference and adaptive system (MARS) and extended Kalman filter-based algorithm implemented in the speed estimator for AC motor.更多还原