【作者】 卢平；

【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】 矢量控制一般称为磁场定向控制，该控制理论的原理是在转子磁通和转矩保持不变的情况下通过坐标变换将异步电机的定子电流分解为按转子磁场定向的两个分量分别进行控制，从而实现转子磁通和转矩的解耦。 本文对矢量控制的原理、控制方法以及控制实施策略进行了较为系统的分析与研究，利用速度间接观测理论，建立了异步电机的磁通观测器，电机的定子磁通和电流的转矩分量可以通过磁通观测器估算出来，从而得到电机的转速，并由此建立了异步电机无速度传感器矢量控制的理论数学模型和相应的控制算法，在此基础之上，利用工程中常用的电机专用DSP芯片TMS320LF2407作为处理器，对异步电机进行变频调速控制。本文对异步电机控制系统着重进行算法和控制软件方面的研究，在此基础上根据异步电机变频调速控制的特殊工况，开发出了一套高性能的异步电机变频调速的矢量控制算法和软件。 本论文通过仿真器对所研制的控制器算法及其性能测试系统的调试，验证了该控制算法的正确性。更多还原

【Abstract】 In engineering, vector control (VC) is called as filed orientation control (FOC). The principle of FOC is to divide stator current into two DC components .One of them is oriented to the rotor magnetic flux, another is oriented to the torque. The operating process can be carried out by transforming coordinate in magnitude flux and torque keeping consistent conditions. As a result, the magnetic flux and torque can be decoupled and controlled.In the paper, the principle and actualizing means of spatial vector control have been systemically discussed and the control software has also been designed. The magnitude of both the rotor flux and the current in torque component have been estimated by using a flux observer, which is developed based on field orientation control principle. The results show that the observer has a good feature due to its speed being calculated without speed sensor or additional hardware. Mathematical model of sensorless induction motor and corresponding control algorithm have also been setup.In the paper, a new variable voltage variable frequency system has been developed based on the study above, and digital signal processor, TMS320LF2407, which is specially designed for motor drive system in practice, is also used to debug the system.The results show that the system can be use to control the motor successfully.更多还原