摘要
针对表贴式永磁同步电机(SPMSM)有限集模型预测直接转矩控制(FCS-MPDTC)转矩和磁链脉动大的问题,提出了基于梯度法的连续集模型预测直接转矩控制(CCS-MPDTC)策略.首先,证明了基于转矩和磁链的价值函数是凸函数;然后采用梯度法求取最优电压矢量,同时采用FCS-MPDTC方法选取起始迭代点,从而在有限迭代次数内求出最终可行解;最后,通过仿真实验验证,并与FCS-MPDTC方法进行了对比,结果表明所提出的CCS-MPDTC能够有效的抑制转矩脉动和磁链脉动,具有与FCS-MPDTC相当的动态特性,验证了所提方法的可行性和有效性.
Aiming at the problem of torque and flux linkage pulsation in the finite set model predictive direct torque control method for implicit permanent magnet synchronous motor,a continuous set model predictive direct torque control strategy based on gradient method is proposed.Firstly,it is proved that the cost function based on torque and flux linkage is locally convex.Then,the gradient method is used to obtain the optimal voltage vector,and the FCS-MPDTC method is used to select the initial iteration point,so that the final iteration is obtained.The feasible solution is finally verified by simulation experiments and compared with the FCS-MPDTC method.The results show that the proposed CCS-MPDTC can effectively suppress torque ripple and flux pulsation with dynamic characteristics comparable to FCS-MPDTC.The feasibility and effectiveness of the proposed method are verified.
作者
绳然
曲行行
曾洁
SHENG Ran;QU Hanghang;ZHENG Jie(School of Electrical and Information Engineering,Dalian Jiaotong University,Dalian 116028,China)
出处
《大连交通大学学报》
CAS
2020年第6期106-111,共6页
Journal of Dalian Jiaotong University
基金
辽宁省自然科学基金资助项目(2019ZD0121)
辽宁省教育厅科学研究计划资助项目(JDL2017040)。
关键词
永磁同步电机
模型预测
梯度下降法
permanent magnet synchronous motor
model prediction
gradient method
