Abstract: In order to solve the problem of the AC Induction Motors(ACIM)for electric vehicles started with a large current and a small torque, a new method of field improved vector control was proposed to solve the startup problem from the viewpoint of ACIM control strategies. Both of the original and the improved model for ACIM ware established in Matlab/Simulink environment,including the rotor indirect field oriented vector control simulation and embedded automatic code generation model. Simulation debugging was carried out firstly, and then C code which was for TI Company C28x series DSP was generated, the bottom hardware driver of TMS320F28335 was written manually, integration of the upper control algorithm and the underlying drive was completed in the development environment of Code Composer Studio. Test of startup was conducted by loading consolidated control code into the motor controller which considered TMS320F28335 as its core. The original and the improved control strategy ware compared by simulation and experiment. Simulation and experimental results show that: using the method of field improved vector control, it enables ACIM to reduce the starting current and increase starting torque rapidly during period of startup. Compared with traditional conventional methods, more cost can be saved more and efficiency can be improved by the new method which improves both the boot device and the hardware structure .

Key words: electromechanical engineering, AC induction motors, startup mode, vector control, software simulation

摘要： 为解决电动车用交流感应电机(ACIM)启动时出现的大电流、小转矩问题，提出励磁改进型矢量控制的新方法,从ACIM控制策略角度考虑解决启动问题。在MMATLAB/SIMULINK环境下建立了ACIM改进前后的转子间接磁链定向矢量控制仿真模型和嵌入式自动代码生成模型。先进行仿真调试，再生成针对TI公司C28x系列DSP的C代码，手工编写TMS320F28335的底层驱动程序，在开发环境Code Composer Studio中完成了上层控制算法和底层驱动程序代码的集成，并将代码烧写到以TMS320F28335为核心的电机控制器中进行启动实验。对改进前后的控制策略进行仿真和实验对比。仿真和实验的结果表明：采用励磁改进型矢量控制的方法能够使ACIM在启动中降低启动电流并迅速提高启动扭矩。该方法比从启动设备和硬件结构上改进的常规方法更加节约成本，提高效率。

关键词: 机电工程, 交流感应电机, 启动方式, 矢量控制, 软件仿真