摘要
传统模型预测控制采用两电平逆变器生成的全部7个基本电压矢量作为备选电压矢量。每个采样周期要进行7次预测运算,造成较大的计算负担。方法一在一个定子磁链扇区内只使用5个基本电压矢量,从而将一个控制周期内的7次预测运算减少至5次。方法二采用以转矩角和定子磁链位置为输入,备选电压矢量为输出的模糊控制器对备选电压矢量集合进行简化。仿真结果表明:两种方法的磁链和转矩控制效果与传统模型预测转矩控制基本相当。模糊控制备选电压矢量集合在转矩较小时偏向使用7个基本电压矢量,使得控制性能与传统模型预测转矩控制基本相当,在转矩较大时偏向使用5个基本电压矢量,提高系统实时性。
Conventional model predictive torque control(MPTC)for permanent magnet synchronous motor(PMSM)uses all 7 basic voltage vectors generated by two-level inverter as candidate voltage vectors.Thus 7 predictive operations are performed for each sampling period which results in large computational burden.Based on rate of utilization of these 7 voltage vectors in MPTC for surface PMSM,two methods to decrease candidate voltage vectors were proposed.One is to only use 5 voltage vectors.Therefore,only 5 predictive operations were needed.The other is to use the fuzzy controller to decrease candidate voltage vector.Simulation results show that compared with conventional MPTC,these two methods can obtain almost the same control performances.The fuzzy controller prefer to using 7 voltage vectors when torque is small,which can achieve good control performance and using 5 voltage vectors when torque is large,which can improve the real-time performance.
作者
李耀华
秦玉贵
杨启东
任佳越
秦辉
LI Yaohua;QIN Yugui;YANG Qidong;REN Jiayue;QIN Hui(School of Automobile, Chang’an University, Xi’an 710064, China)
出处
《微电机》
北大核心
2020年第8期63-69,共7页
Micromotors
基金
国家自然科学基金(51207012)
陕西省工业科技攻关项目(2016GY-069)
陕西省微特电机及驱动技术重点实验室开放基金(2013SSJ2002)
中央高校基本科研业务费专项资金资助项目(300102228201)。
关键词
永磁同步电机
模糊控制
模型预测控制
备选电压矢量
permanent magnet synchronous motor
fuzzy control
model predictive torque control
candidate voltage vectors
