中国机械工程
中國機械工程
중국궤계공정
China Mechanical Engineering
2015年
20期
2806-2810
,共5页
李孟秋%周志康%黄守道%廖武
李孟鞦%週誌康%黃守道%廖武
리맹추%주지강%황수도%료무
异步电机%直接转矩控制%效率优化%损耗模型%前馈补偿
異步電機%直接轉矩控製%效率優化%損耗模型%前饋補償
이보전궤%직접전구공제%효솔우화%손모모형%전궤보상
asynchronous motor%direct torque control(DTC)%efficiency optimization%loss model%feedforward compensation
针对异步电机在轻载和高速运行时效率低的问题,提出了一种异步电机直接转矩控制技术的效率优化算法。建立了基于定子磁场定向下旋转坐标系的电机损耗模型,分析了电机损耗与转矩、转速与定子磁链的关系,从而导出稳态时最优的定子磁链幅值,实现电机在不同工况下以最优效率运行。为解决最优磁链计算模块引入后电机控制系统动态响应慢的问题,将伺服电机控制中常用的前馈补偿与速度外环 PI 调节器相结合,来提高效率优化算法引入后系统的动态性能。
針對異步電機在輕載和高速運行時效率低的問題,提齣瞭一種異步電機直接轉矩控製技術的效率優化算法。建立瞭基于定子磁場定嚮下鏇轉坐標繫的電機損耗模型,分析瞭電機損耗與轉矩、轉速與定子磁鏈的關繫,從而導齣穩態時最優的定子磁鏈幅值,實現電機在不同工況下以最優效率運行。為解決最優磁鏈計算模塊引入後電機控製繫統動態響應慢的問題,將伺服電機控製中常用的前饋補償與速度外環 PI 調節器相結閤,來提高效率優化算法引入後繫統的動態性能。
침대이보전궤재경재화고속운행시효솔저적문제,제출료일충이보전궤직접전구공제기술적효솔우화산법。건립료기우정자자장정향하선전좌표계적전궤손모모형,분석료전궤손모여전구、전속여정자자련적관계,종이도출은태시최우적정자자련폭치,실현전궤재불동공황하이최우효솔운행。위해결최우자련계산모괴인입후전궤공제계통동태향응만적문제,장사복전궤공제중상용적전궤보상여속도외배 PI 조절기상결합,래제고효솔우화산법인입후계통적동태성능。
Due to the asynchronous motor efficiency at light load and high speed operation is low,a kind of efficiency optimization control algorithm of asynchronous motor direct torque control technology was put forward.The motor loss model of stator field oriented rotating coordinate system was built based on the ana-lyses,the relationship between motor loss and torque,speed and flux of the stator was analysed.Then the optimal stator flux amplitude in steady state was derived.The optimal efficiency of motor under dif-ferent operating conditions was realized.Module was introduced to solve the optimal flux calculation, and low response of the system dynamic motor control,a feedforward compensation and speed PI reg-ulator commonly used servo motor control in external loop were combined,to improve the dynamic performance of the system after the efficiency optimization algorithm was introduced.