摘要
永磁同步电机(PMSM)直接转矩控制(DTC)具有结构简单,动态性能良好以及对电机参数鲁棒性强等优点,但是却存在转矩和磁链波动较大等不足。本文通过分析永磁同步电机转矩和磁链变化规律,提出一种仍采用单电压矢量并能够降低转矩和定子磁链波动的DTC方法。该方法根据转矩和磁链控制要求计算参考电压,并以参考电压矢量为目标,选择与之偏差最小的输出电压矢量作用于电机,抑制了转矩和磁链波动。实验和仿真结果证明了所提方法的有效性。
Direct torque control（DTC） for PMSM has many advantages such as simple structures, fast dynamic performance and robust on motor parameters, however, one of the main drawbacks is the significant torque and flux ripples. In this paper, the change law of torque and electromagnetic torque and stator flux is analyzed and a novel DTC method which still employs single vector is proposed to reduce the torque and flux ripples. The proposed method figures out the reference output voltage vector according to the controlling demands of torque and flux. Targeted the reference vector, the output voltage vector of two-level inverter which has minimum deviation with the reference is selected. Both the hardware experiments and software simulations prove the validity of the proposed method.
出处
《电工技术学报》
EI
CSCD
北大核心
2015年第14期116-121,共6页
Transactions of China Electrotechnical Society
基金
国家重点基础研究发展计划项目(973项目)(2013CB035600)
国家自然科学基金青年基金(51307121)
