无位置传感器无刷直流电机位置检测与启动控制研究  

Research on the Position Detection and Start Control for Sensorless Brushless DC Motor

作　　者：周勇[1] 米彦昭 汪嘉瑶 韩雁婷 陈龙[1] 张超[1] 

机构地区：[1]西北工业大学航空学院,陕西西安710072

出　　处：《西北工业大学学报》2017年第2期208-212,共5页Journal of Northwestern Polytechnical University

基　　金：中央高校基本科研业务费资助项目(3102016ZY002)资助

摘　　要：针对无位置传感器无刷直流电机控制问题,提出利用反电动势过零检测法实现电机转子位置检测,并利用三段式启动法完成电机启动。将无刷电机三相绕组的端电压信号转换成数字信号,并推导出三相绕组端电压与未导通相反电动势的关系,通过计算解出反电动势的过零点。电机启动时先通过对指定相通电,确定转子的初始位置,进而由外同步加速状态切换到自同步状态。文章采用Labview软件搭建了电机启动控制系统仿真模型,最后通过仿真和试验验证了所提方案的有效性与可靠性。To solve the problem of precise control for the sensorless Brushless DC Motor （ BLDCM）, the BEMF- crossing-zero detecting is in used to detect the rotor position, and a three-stage starting strategy is presented to start the motor in this paper. The terminal voltage signal of three-phase winding are converted into digital signal, and the relationship between the terminal voltage in the winding and the BEMF of the phase is derived. Then, the zero- crossing point of BEMF could be resolved. When the motor is beginning to start, a specified phase is break-over to find the initial position of the rotor. Then, the external-synchronous acceleration is switched to the self-synchronous acceleration. The simulation model of sensorless BLDCM is built based on LabVIEW. The results of simulation and the experiments verified the effectiveness and reliability of the strategy.

关 键 词：无位置传感器 无刷直流电机 转子位置 反电动势过零检测 三段式启动 LABVIEW仿真 同步加速 实验设计 数字信号处理 

分 类 号：TP23[自动化与计算机技术—检测技术与自动化装置]