感应电机无权重系数模型预测转矩控制  

Model Predictive Torque Control of Induction Motor Without Weighting Factor

作　　者：张瑞林 卢子广[1] 甘霖 李嘉鑫 ZHANG Ruilin;LU Ziguang;GAN Lin;LI Jiaxin(School of Electrical Engineering,Guangxi University,Nanning 530004,Guangxi,China)

机构地区：[1]广西大学电气工程学院,广西南宁530004

出　　处：《电气传动》2020年第10期102-106,共5页Electric Drive

基　　金：广西自然科学基金资助项目(2018GXNSFDA138008)。

摘　　要：繁琐的加权因子调整限制了传统的模型预测转矩控制在实际中的广泛应用。为了解决这一问题,提出了一种无权重系数的模型预测转矩控制策略。该策略引入了一个新的镜像转矩变量控制感应电机的磁链,利用电磁转矩和镜像转矩构造了新的价值函数。新的控制策略使用这2个量纲相同的控制变量,替代了传统模型预测转矩控制中的转矩和磁链变量,消除了价值函数中的加权因子,提高了控制方法的效率。仿真和实验结果表明,所提方法在保持传统模型预测转矩控制快速动态性能和优良稳态性能的同时,提出的算法消除了加权因子,降低了平均开关频率。因此,该方法有效并且更具实用性。Tedious adjustment of the weighting factor restricts the wide application of conventional model predictive torque control(MPTC)for induction motors(IMs)in practice.To solve this problem,a MPTC strategy without weighting factor was proposed.A ghost torque variable was introduced to control the flux of IM,ghost torque and electromagnetic torque were used to construct a new cost function.A pair of variables with the same dimensions was used instead of the torque and flux amplitude in conventional MPTC,to eliminate the weighting factor of the cost function,and improve efficiency.Simulation and experimental results show that the new approach can maintain excellent dynamic and steady-state performance similarly to conventional MPTC.At the same time,the proposed approach can avoid the weighting factor,and reduce switching frequency.Hence,the proposed method is expected to be more practical.

关 键 词：感应电机 模型预测转矩控制 价值函数 加权因子 

分 类 号：TM28[一般工业技术—材料科学与工程]