电工技术学报2017，Vol.32Issue(4)：133-139,7.
低速下无刷直流电机三相电压矢量位置检测方法
Position Detection Method of Brushless DC Motor Used at Low Speed Utilizing Three-Phase Voltage Vector
摘要
Abstract
This paper presents a sensorless control method of brushless DC motor suitable for low speed condition. This method estimates the rotor position according to the difference value of the electromotive force between stator phases. By applying two three-phase voltage vectors which have a 120°phase angle difference, the response current of DC side is sampled at the end time of each vector, and its value relationship is compared to determine the rotor position. The paper analyzes the effects of the stator iron saturation and voltage vector on accuracy bias of position detection. Compared with the traditional inductance method, this method uses less detection vectors and reduces the detection time. Compared with the long-short pulse position detection method, the difference value of response current is larger, which is easier to be detected under the same condition. The accuracy of the commutation can be improved. Experimental results demonstrate the effectiveness of the proposed method.关键词
无刷直流电机/无位置传感器控制/三相电压矢量/低速运行Key words
Brushless DC motor/sensorless control/three-phase voltage vector/low speed operation分类
信息技术与安全科学引用本文复制引用
陈炜,刘志博,刘凯,夏长亮,耿强..低速下无刷直流电机三相电压矢量位置检测方法[J].电工技术学报,2017,32(4):133-139,7.基金项目
国家重点基础研究发展计划(973计划)(2013CB035600),国家自然科学基金(51577126)和天津市科技支撑计划(16YFZCSF00580)资助项目. （973计划）
