Influence of DSP controller on performance of a permanent magnet brushless AC drive in flux-weakening mode  

作　　者：HOWE D. 

机构地区：[1]Department of Electronic & Electrical Engineering University of Sheffield, Mappin Street, Sheffield S1 3JD, UK

出　　处：《Journal of Zhejiang University-Science A(Applied Physics & Engineering)》2005年第2期83-89,共7页浙江大学学报（英文版）A辑（应用物理与工程）

摘　　要：The flux-weakening performance of a permanent magnet brushless AC drive was investigated using both floating-point and fixed-point DSP controllers. A significant current oscillation was observed when the drive was operated at high-speed in the flux-weakening mode with the fixed-point DSP. The investigation showed that this was due to the on-line compensation of the winding resistance voltage drop and quantisation errors associated with the fixed-point architecture of the DSP. A simple look-up table scheme is proposed to eliminate the oscillation and to achieve extended flux-weakening capability.The flux-weakening performance of a permanent magnet brushless AC drive was investigated using both floating-point and fixed-point DSP controllers. A significant current oscillation was observed when the drive was operated at high-speed in the flux-weakening mode with the fixed-point DSP. The investigation showed that this was due to the on-line compensation of the winding resistance voltage drop and quantisation errors associated with the fixed-point architecture of the DSP. A simple look-up table scheme is proposed to eliminate the oscillation and to achieve extended flux-weakening capability.

关 键 词：Brushless drive DSP Electrical machine FLUX-WEAKENING OSCILLATION QUANTISATION 

分 类 号：TP332[自动化与计算机技术—计算机系统结构]