低速下无刷直流电机三相电压矢量位置检测方法
发布时间：2018-12-14 22:30
【摘要】：提出一种适用于无刷直流电机低速运行时的无位置传感器控制方法,该方法依据相间反电动势差值进行转子位置检测,通过施加两个相位相差120°的三相电压矢量,分别采样矢量作用结束时刻的直流侧响应电流并比较其大小关系判断转子位置。同时分析了磁路饱和效应和电压矢量作用时间对位置检测精度的影响。与传统电感法相比,该方法检测矢量少,缩短了检测时间;与长短脉冲位置检测方法相比,在相同条件下响应电流差值大,更易于检测,提高了换相准确性。实验结果验证了所提方法的有效性。
[Abstract]:A position sensorless control method for brushless DC motor at low speed is proposed. The rotor position is detected according to the potential difference between phases, and the three phase voltage vector with 120 掳phase difference is applied. The DC side response current at the end of the vector action is sampled separately and the rotor position is judged by comparing the magnitude of the current. At the same time, the influence of saturation effect of magnetic circuit and time of voltage vector on the precision of position detection is analyzed. Compared with the traditional inductance method, this method has fewer detection vectors and shorter detection time. Compared with the long and short pulse position detection method, the difference of the response current under the same conditions is larger, the detection is easier, and the commutation accuracy is improved. The experimental results show that the proposed method is effective.
【作者单位】： 天津大学电气与自动化工程学院;天津工业大学天津市电工电能新技术重点实验室;
【基金】：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) 天津市科技支撑计划(16YFZCSF00580)资助项目
【分类号】：TM33
[Abstract]:A position sensorless control method for brushless DC motor at low speed is proposed. The rotor position is detected according to the potential difference between phases, and the three phase voltage vector with 120 掳phase difference is applied. The DC side response current at the end of the vector action is sampled separately and the rotor position is judged by comparing the magnitude of the current. At the same time, the influence of saturation effect of magnetic circuit and time of voltage vector on the precision of position detection is analyzed. Compared with the traditional inductance method, this method has fewer detection vectors and shorter detection time. Compared with the long and short pulse position detection method, the difference of the response current under the same conditions is larger, the detection is easier, and the commutation accuracy is improved. The experimental results show that the proposed method is effective.
【作者单位】： 天津大学电气与自动化工程学院;天津工业大学天津市电工电能新技术重点实验室;
【基金】：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) 天津市科技支撑计划(16YFZCSF00580)资助项目
【分类号】：TM33
【相似文献】
相关期刊论文 前10条
1 邱建琪,史涔n，
本文编号：2379427
本文链接：https://www.wllwen.com/kejilunwen/dianlidianqilunwen/2379427.html
