【作者】 高剑；

【导师】 黄守道；

【作者基本信息】 湖南大学 ， 电机与电器， 2004， 硕士

【摘要】 本论文在研究永磁同步电动机运行原理的基础上详细讨论了其变频调速的理论并且设计了一套基于DSP的永磁同步电动机磁场定向矢量控制系统。永磁同步电动机相对感应电动机来说具有体积小、效率高以及功率密度大等优点，因此自从上个世纪80年代，随着永磁材料性能价格比的不断提高，以及电力电子器件的进一步发展，永磁同步电动机的研究也进入了一个新的阶段。永磁同步电动机既区别于感应电动机又与电励磁同步电动机相比有自身的特点，因此本论文首先从永磁同步电动机的本身出发，讨论了其稳态运行原理，分析了永磁同步电动机的转矩特性、功率特性及效率。矢量控制理论的发明是交流调速领域中的一个重大突破，本论文详细讨论了永磁同步电动机的矢量控制，在推导其精确数学模型的基础上分析了矢量控制理论用于永磁同步电动机控制的几种电路控制策略，包括了i_d=0控制、COSφ=1控制，以及最大转矩／电流控制方式，并且开发出基于DSP的全数字永磁同步电动机的矢量控制系统，给出了其软、硬件的设计方案。弱磁控制是永磁同步电动机矢量控制又一方面，论文分析了永磁同步电动机弱磁调速的原理以及弱磁扩速困难的原因，并由此提出了两种特殊转子结构的新弱磁方案。直接转矩控制是继矢量控制后交流调速领域的又一个高性能控制方法，论文最后讨论了直接转矩控制理论在永磁同步电动机控制上的运用，并使MATLAB工具对永磁同步电动机的直接转矩控制系统进行了仿真研究，仿真结果表明，直接转矩控制具有动态性能好，静差小以及鲁棒性好的特点。更多还原

【Abstract】 Based on the operation theory of the Permanent magnet synchronous motor (PMSM) the details of the variable frequency speed adjusting theory of PMSM is presented in this paper together with the field-orientation vector control (VC) system of PMSM based on DSP. PMSM has the advantage of smaller volume, higher efficiency and power density over the induction motor. Therefore the research on PMSM has entered a new stage since the 1980’ s with the improvement of ratio between the performance and the price of the PM material and the development of the power electronics devices. PMSM has its own characteristics compared to the induction motor and the EESM. Naturally the paper originates from the PMSM itself, discusses the steady operation theory, analyses the torque character of PMSM, power character and efficiency as well. VC theory is one of the greatest breakthroughs in the AC speed control field. Also details of the VC of PMSM is presented in the paper, and the analysis of several circuit control strategies of VC theory applied to the PMSM control, which include the id =0 control, cos = 1 control and the max torque/current control. A complete digital PMSM VC system based on DSP is developed with the soft and hard ware design plans given. The paper discusses the theory of weaking flux speed control of PMSM and the reason why the weaking flux speed extending is difficult, and then brings out two new weaking flux plans, which have special rotor structures. Direct torque control (DTC) theory is another advanced control theory after VC theory in the speed control field. The application of DTC theory on PMSM is discusses in the end and the simulation results show perfect dynamic performance, minor static error and good robustness characteristic.更多还原