【作者】 汪伟；

【导师】 刘佐民；

【作者基本信息】 武汉理工大学 ， 机械设计及理论， 2004， 硕士

【摘要】 电动汽车将作为本世纪的重要交通工具，以其节约石油资源、减少大气污染等优势，越来越受到重视。然而电动汽车用电机在实现汽车的走动与驱动功能时，仍存在大量的问题，基于DSP的电动汽车异步电机的直接转矩控制是电机的高性能交流变频调速的新技术之一。 本论文中通过对三相异步电动机作出四条假设，得到电机的等效物理模型。并据此建立了异步电动机在三相坐标系和二相静止坐标系下的数学模型，后者用于直接转矩控制的研究。为了便于分析，将磁路问题转换成电路拓扑的形式，推导出定转子之间的等效电路。由T—Ⅱ型瞬态等效电路得出异步电动机的三种磁链模型。将异步电动机和逆变器作为一个整体，建立了逆变器的数学模型。在建立异步电动机的数学模型之后，采用空间电压矢量分析方法讨论了直接转矩控制的基本原理结构及其算法，着重研究了圆形磁链自控制和无速度传感器技术在直接转矩变频调速中的应用。在理论分析的基础上，研究了以TMS320LF2407 DSP EVM板为核心的控制电路和以IPM为功率器件的主回路，并在CC’C2000环境下实现了基于TMS320LF2407 DSP的异步电动机直接转矩控制算法。 本论文完成了以u—n为磁链模型圆形磁链和模型参考自适应法的无速度传感器等算法研究。然后实现了基于JTAG的软件在线调试。更多还原

【Abstract】 Electric vehicles are more and more regarded as an important one in this century for its advantage of economicity , control the air pollution etc. However, some problames haven’t been solved.The direct torque control means of electric vehicles’ asynchronous electromotor based on DSP has an high capability of AC timing by varietying frequency.The purpose of the paper is to find new way and software to control electric vehicles’ asynchronous electromotor. An equivalent physical model is developed by some hypothesizes for three phases asynchronous electromotor. The models in the three phase and two phases static coordinates are made based on this, and the later are used in the study of direct torque control. The question of magnetic path is transformed into the form of circuit topology to derivate the equivalent circuit between stator and rotor. Three magnetic chain models of asynchronous electromotor are gotten from T- II evanescence equivalent. Regard the asynchronous electromotor and inverter as a whole, the mathematical model of inverter is build. After the mathematical model of asynchronous electromotor is build, the method of space voltage vector is taken to discuss the essential principle and structure, and arithmetic of direct torque control, and the application of circular magnetic chain self-operated control and the technology of sensor without velocity in direct torque frequency conversion timing are emphasized. Based on the theoretic analysis, the control circuit which uses the TMS320LF2407 DSP EVM board as core and the main circuit which uses the IPM as the power parts of an apparatus is studied, and the arithmetic of asynchronous electromotor direct torque control based on TMS320LF2407 are made in the environment of CC’C2000.The circular magnetic chain which uses the u-n as the magnetic chain model and the arithmetic studying of sensor without velocity and others of model reference method self-adapting are accomplished. And the online debugging of the software based JIAG are accomplished.更多还原