基于期望电压矢量的永磁同步电机快速速度预测控制  

Fast speed predictive control of permanent magnet synchronous motor based on expected voltage vector

作　　者：黄宴委[1] 汤邵建 黄文超 陈少斌[1] HUANG Yan-wei;TANG Shao-jian;HUANG Wen-chao;CHEN Shao-bin(College of Electrical Engineering and Automation,Fuzhou University,Fuzhou 350116,China)

机构地区：[1]福州大学电气工程与自动化学院,福州350116

出　　处：《电机与控制学报》2020年第4期87-95,共9页Electric Machines and Control

基　　金：国家自然科学基金(51977040);福建省工业引导项目(2019H0007)。

摘　　要：针对传统永磁同步电机速度预测控制系统的价值函数速度与电流项权重系数难以确定,且采用遍历方式选择控制电压矢量导致计算量大这2个缺点,提出一种基于期望电压矢量的快速速度预测控制方法。利用泰勒级数对电机速度模型进行离散化,获得期望电压矢量;将价值函数中转速和d轴电流的误差项均转化为电压量纲,避免了权重系数的调整;利用Clark变换计算期望电压矢量的角度,得到期望电压矢量所在的局部扇区。将构成该局部扇区的基本电压矢量作为备选电压矢量,代入价值函数计算,令价值函数最小的备选电压矢量作为控制电压矢量调节逆变器。仿真和实验结果表明,所提出的方法无需调节权重,就可达到传统方法在最佳权重时的系统稳态误差,便于实际应用,且计算步骤节省约55%。The conventional speed predictive control system of permanent magnet synchronous motor has two major drawbacks:the weight coefficient between the speed and current term of the cost function being difficult to determine,and the selection of control voltage vector by the traversal mode resulting in a large amount of calculation.A fast speed predictive control based on expected voltage vector is proposed to regulate speed.The motor speed model was discretized by Taylor series to obtain an expected voltage vector,and the error terms of the speed and d-axis current in the cost function were converted into voltage dimension,which avoids the adjustment of the weight coefficient.The Clark transform was used to calculate the angle of the expected voltage vector to describe the local section of the expected voltage vector.The basic voltage vector constituting the local sector was used as candidate voltage vectors to be substituted into the cost function,and the candidate voltage vector with the smallest cost function was used as the control voltage vector to regulate the inverter.The simulation and experimental results show that the proposed method can achieve the same steady-state error as that by the conventional method with the optimal weight.The proposed method is convenient for practical application without adjusting the weight and saves 55%in the calculation step.

关 键 词：永磁同步电机 速度预测控制 期望电压矢量 价值函数 局部扇区 权重系数 

分 类 号：TM341[电气工程—电机]