基于DSP三相交流电动机矢量控制的软件设计

The software development of DSP three-phase AC motor based on vector control

介绍了全数字式三相交流电动机矢量控制的软件设计。在软件设计中完成了主程序和PWM时基、A/D转换及故障中断子程序的设计,在PWM时基中断子程序设计中重点叙述了PWM矢量控制实现的具体方法。电机启动时采用SVPWM开环控制运行,系统进入闭环后采样电机定子电流,进行Clarke变换和Park变换。结果表明,三相交流电动机启动快,调速范围宽,精度高。

It introduces the software development of the full digital three phase AC motor vector control. The software system includes the main program,PWM time base,A / D conversion completion and fault interrupt subroutine. It shows the detail about PWM time base interrupt subroutine design. It uses SVPWM open- loop operation to start the motor,then conducts current sampling in the closed- loop process,and realizes the Clarke transformation and Park transformation. The results show that the three- phase AC motor starts faster in a wider range of rotational speed modulation with high precision as well.