无刷双馈电机模糊直接转矩控制系统研究

摘要

To deal with the large torque ripple and inconstant switching frequency of the traditional direct torque control method for brushless doubly-fed machines (BDFM),a fuzzy direct torque control (DTC) strategy based on DSP is proposed. The fuzzy controller is designed by using the software of WinFACT and transplanted to the DSP after converting into C source code. Software and hardware design of fuzzy direct torque control system for BDFM is achieved. Experimental results show that on the basis of keeping advantages of traditional DTC,the proposed control method reduces torque ripple effectively,which improves the performance of traditional DTC.%针对传统直接转矩控制方法控制无刷双馈电机(BDFM)存在的转矩脉动大、开关频率不固定等问题,提出了一种基于DSP的模糊直接转矩控制策略.利用模糊控制系统设计软件WinFACT进行了模糊控制器设计,并将其转换为C程序代码后移植到DSP中,实现了无刷双馈电机模糊直接转矩控制系统的软、硬件设计.试验结果表明,该控制方法在保持传统直接转矩控制优点的基础上,能够有效减小转矩脉动,改善直接转矩控制的性能.