电机与控制应用Issue(6)：19-23,5.
基于单片机的无位置传感器无刷直流电机控制
Position Sensorless Control Strategy for BLDCM Based on MCU
摘要
Abstract
Starting control and rotor position signal are the key of the normal operation for sensorless brushless DC motor ( BLDCM) . A novel control strategy of BLDCM was proposed . When the motor is still or at low speed, method of short pulse test based on the magnetic saturation effect of stator core was used to get the rotor position, and to make the motor starting. Making use of the relation of line back-EMFs and the phase commutation time, a conclusion that the phase commutation should be made at the moment of zero-crossing of line back-EMFs was drawn. According to the disadvantage of zero-crossing of line back-EMFs, the three zero-crossings of line back-EMFs were integrated into one signal, C8051F’s comparator interrupt was used to avoid the disadvantage, and position sensorless accurately commutated was achived at low cost. The control scheme can guarantee that the BLDCM reliably operates in the condition of position sensor failure or without position sensor, and the system structure is simplified, and the production cost is reduced.关键词
无刷直流电机/无位置传感器控制/线反电动势/比较中断Key words
brushless DC motor/position sensorless control/line back-EMF/comparator interrupt分类
信息技术与安全科学引用本文复制引用
胡发焕,任志斌,潘春荣..基于单片机的无位置传感器无刷直流电机控制[J].电机与控制应用,2014,(6):19-23,5.基金项目
国家自然科学基金(71361014) （71361014）
