分析了电流环的数学模型,导出了电流环闭环传递函数,得出带宽的大小与系统延时的大小成反比。传统基于数字信号处理器的PMSM电流环的延时比较大,转速变化越大,带宽的影响越明显,而采用现场可编程门阵列FPGA控制的PMSM,可以将电流环的延时缩小一倍,进而改善速度环的响应能力并试验验证理论分析。

The current loop mathematical model was at first analyzed, then the closedloop transfer function of the current loop was derived, it was pointed out that bandwidth was inversely proportional to system delay times. The traditional PMSM current loop delay times based on digital signal processor (DSC) was relatively large, the greater the speed change, the more obvious the impact of bandwidth, while PMSM current loop delay times based on fieldprogrammable gate array (FPGA) could be reduced one times, which improved the response of the speed loop, and experimental results verified the theoretical analysis.

TM 351