感应电机最大效率控制时损耗模型研究  

Loss model of induction motor under efficiency maximization control

作　　者：徐占国[1] 邵诚[1] 

机构地区：[1]大连理工大学控制科学与工程学院,辽宁大连116024

出　　处：《大连理工大学学报》2010年第5期762-766,共5页Journal of Dalian University of Technology

基　　金："九七三"国家重点基础研究发展计划资助项目(2007CB714006)

摘　　要：从分析感应电机的铁损耗入手,给出了转子铁损耗等效电阻随转差率的变化关系.通过研究转子铁损耗在整个铁损耗中所占比例和同步角频率的关系,指出在低速区转子铁损耗对电机运行效率有着显著的影响.建立了考虑转子铁损耗时感应电机的损耗模型.利用拉格朗日优化算法,推导出感应电机在矢量控制下稳态运行时效率最高的控制条件.实验结果证实,所建立的损耗模型在全速范围内都有着较高的准确度,所推导的最大效率运行条件也是切实有效的.Relationship between the rotor iron loss equivalent resistor and slip can be derived through analysis of iron loss of induction motor.From the relationship between the proportion of rotor iron loss as to total iron loss and the electrical angular frequency of the flux,it is shown that the effect of rotor iron loss on the efficiency of induction motor is distinct at low speed.Taking the rotor iron loss into account,a loss model of induction motor is set up.The efficiency maximization control condition for induction motor vector control drive at steady state condition is derived using the Lagrange theorem.The experimental results show that the proposed model is accurate within the whole speed range,and the efficiency maximization control condition is valid.

关 键 词：感应电机 转子铁损耗 损耗模型 最大效率 矢量控制 

分 类 号：TM301[电气工程—电机]