异步电机模型预测直接转矩控制  

Model Predictive Direct Torque Control of Asynchronous Motor

作　　者：朱晓雨[1] 王丹[1] 彭周华[1] 刘星[1] 

机构地区：[1]大连海事大学轮机工程学院,辽宁大连116026

出　　处：《电机与控制应用》2016年第2期6-12,共7页Electric machines & control application

基　　金：国家自然科学基金(61273137;51209026);辽宁省教育厅科学研究一般项目(L2013202);中央高校基本科研业务费专项基金项目(3132015021;3132014321)

摘　　要：传统直接转矩控制不仅计算复杂而且对参数依赖大,导致系统控制延时,严重阻碍系统应用。为克服上述难点,提出一种带延时补偿的模型预测直接转矩控制方法,对定子磁链和转矩进行预测,并结合拉格朗日外推法,得到具有延时补偿的控制策略。基于三相异步电机数学模型,以定子磁链和转矩误差为目标函数,通过在线评估开关矢量对电机的作用效果,最终选择使目标函数最小的最优电压矢量。该算法能够有效降低转矩和磁链脉动,减小电流谐波畸变,并且系统结构简单,动态响应较快,解决了传统方法中存在的延时问题。仿真验证了所提方法的有效性。There is a large amount of calculation during the traditional model predictive direct torque control（ MPDTC） process which leads to the time delay and hinder the application of the MPDTC. In order to solve the problem,presents a novel model predictive direct torque control method based on objective function optimization. A delay compensation-based model predictive control strategy was derived by combining the Lagrange extrapolation and the prediction of the stator flux linkage and torque. Based on three-phase voltage inverter driven induction motor,we established the simulation model of MPDTC. Simulation results showed that the algorithm could effectively reduce the torque and flux ripple and reduce the current harmonics distortion with high dynamic response. Especially,the proposed method could solve the delay problem in traditional method. Simulation results were given to show the effective of the proposed method.

关 键 词：异步电机 模型预测直接转矩控制 目标函数 延时补偿 

分 类 号：TM301.2[电气工程—电机]