一种改进的异步电机直接转矩控制策略  

An Improved Stratigy of Direct Torque Control for Induction Motors

作　　者：李春菊[1,2] 刘国荣[1] 彭磊[1] 

机构地区：[1]湖南工程学院,411101 [2]湘潭大学,411105

出　　处：《电机技术》2009年第2期32-35,共4页Electrical Machinery Technology

基　　金：湖南省科技计划项目资助(2008J3029)

摘　　要：为减少异步电机转矩脉动和定子磁链固定偏差,提出了一种改进的异步电机直接转矩控制策略。该策略是基于给定定子磁链幅值和角度的解耦控制,用瞬时转差角频率和转子角频率之间的关系来调节定子磁链给定角,而给定定子磁链幅值保持额定值不变。通过Matlab6.5/simulink建立了仿真模型,仿真结果证实了该控制策略的有效性。A modified direct torque control strategy was proposed in order to reduce electromagnetic torque ripple and stator flux droop for induction motor .This method was based on control of separation between amplitude and angle of the given stator flux.The relationship between instantaneous slip angle of the motor and circular frequency of the rotor was used to adjust the the given stator flux angle. The amplitude of the given stator flux was always kept constant at rated value. The simulation model was established by Matlab6.5/simulink, the results of which confirmed the effictiveness of the method.

关 键 词：直接转矩控制 定子磁链幅值和角度 异步电机 仿真 

分 类 号：TM34[电气工程—电机] TM343