微型机与应用
微型機與應用
미형궤여응용
MICROCOMPUTER & ITS APPLICATIONS
2014年
4期
64-66,70
,共4页
颜冰钧%郭新华%卢小芬%戴茵茵%尚荣艳
顏冰鈞%郭新華%盧小芬%戴茵茵%尚榮豔
안빙균%곽신화%로소분%대인인%상영염
永磁无刷直流电机%无位置传感器控制%三段式起动%反电动势过零点法
永磁無刷直流電機%無位置傳感器控製%三段式起動%反電動勢過零點法
영자무쇄직류전궤%무위치전감기공제%삼단식기동%반전동세과영점법
BLDC motor%sensorless control%three-step starting method%back EMF zero-crossing detection
分析了无刷直流电机数学模型，对无刷直流电机无传感器控制的三段式起动与反电动势过零点换相技术做出研究。利用电机三相端电压与反电动势间关系来确定电机反电动势过零点与换相点，提出了基于三相反电动势的改进型反电动势过零点换相方法。设计了基于 DSP_F2812的无刷直流电机控制平台。通过实验验证表明，基于三段式起动与改进型反电动势过零点换相方法的 BLDCM无位置传感器控制达到了带霍尔传感器换相控制的精度与效果。
分析瞭無刷直流電機數學模型，對無刷直流電機無傳感器控製的三段式起動與反電動勢過零點換相技術做齣研究。利用電機三相耑電壓與反電動勢間關繫來確定電機反電動勢過零點與換相點，提齣瞭基于三相反電動勢的改進型反電動勢過零點換相方法。設計瞭基于 DSP_F2812的無刷直流電機控製平檯。通過實驗驗證錶明，基于三段式起動與改進型反電動勢過零點換相方法的 BLDCM無位置傳感器控製達到瞭帶霍爾傳感器換相控製的精度與效果。
분석료무쇄직류전궤수학모형，대무쇄직류전궤무전감기공제적삼단식기동여반전동세과영점환상기술주출연구。이용전궤삼상단전압여반전동세간관계래학정전궤반전동세과영점여환상점，제출료기우삼상반전동세적개진형반전동세과영점환상방법。설계료기우 DSP_F2812적무쇄직류전궤공제평태。통과실험험증표명，기우삼단식기동여개진형반전동세과영점환상방법적 BLDCM무위치전감기공제체도료대곽이전감기환상공제적정도여효과。
A mathematical model of the permanent magnet brushless DC motor has been analyzed while three-step starting technology and commutation has been studied in this paper . Then an improvement method of back EMF zero-crossing detection base on the mathematical model of BLDC motor has been proposed . Commutating was guided by using the corresponding relation between motor ’ s terminal voltages and back EMF . A hardware system based on DSP_F2812 had been put up . Experimental result verify the reliability and utility of the sensorless control system by using three-step starting technology and back EMF zero-crossing detecting commutation comparison with HALL-sensor control .
