【作者】 宋明华；

【导师】 刘军； 李生民；

【作者基本信息】 西安理工大学 ， 模式识别与智能系统， 2009， 硕士

【摘要】 矩阵变换器作为一种通用电力变换装置,可以方便实现n相到m相变换。该变换器能够产生可控的正弦输出电压和单位功率因数的输入电流；无中间储能环节、能量可双向传递一次变换、动态响应快；采用不同控制算法,可实现整流、逆变、变频、斩波等功能。因此,利用电力电子技术、计算机技术和控制理论的研究成果,开发一种对电网无污染、四象限运行的高质量交流变频电源,成为从事电力电子分析与控制学者研究的热点。本文介绍了矩阵变换器的数学基础,工作原理,电路组成和其它的变换功能。重点论述了控制策略和换流策略这两项关键技术。控制策略列举了Venturini控制法,空间矢量法等。换流策略主要研究和比较了半软四步换流法和半自然两步换流法。在比较各种控制策略的基础上,利用Simulink建立了两个调制策略的仿真模型,仿真结果证明了矩阵变换器良好的变压变频能力。本文研究的目的是对矩阵式变换器基本原理、控制策略、开关换流、应用范围等基本性问题进行探索性研究工作。通过理论分析、计算机仿真和实验验证得出了一些有意义的经验和结论,为课题的进一步的深入研究奠定了基础。更多还原

【Abstract】 MC (Matrix Converter) as one type of general power converter, can realize n phase to m phase voltage conversion. It can provide sinusoidal output voltages with varying amplitude and frequency, at the same time, drawing sinusoidal input currents with unity power factor. Moreover, it can render bi-directional power flow without energy storage components except small AC filters for elimination of switching ripples By means of changing the control algorithm, the MC functions as rectifier, inverter, converter, etc. Moreover, according to the research achievement of electronics, computer science and Control Theory, high quality of four-quadrant operation of Variable Frequency Power without power grid pollution will probably be achieved. As a result, due to above mentioned characteristics, MC attracts many researchers’interests to investigate on power conversion by means of different new technical issues.In this paper, mathematics mechanism, fundamental principle, circuit components and other conversion functions of matrix converter are described, control method and current commutation are emphasized. Venturini control method and space vector control metheod are listed. Among current commutation strategy, four-step current commutation and two-step current commutation are researched and compared. On the base of comparing of control methods, two modules are built, and the result proved the good performance of voltage transformation and frequency transformation.This thesis discusses principal issues of the matrix converter such as prime principle, control strategy, current commutation, its applications etc. By the theoretical analysis, computer simulation and experimental investigation, some valuable experiences and significant conclusions are given, which found the basis of the project for the further studies.更多还原