基于矢量细分的永磁同步电机直接转矩控制研究

传统永磁同步电机直接转矩控制采用六边形磁链控制或6区间的圆形磁链控制,造成转矩脉动大等缺陷.针对传统6区段控制方式的缺陷和当定子磁链处于区段线附近时控制性能差的特点.采用矢量细分的方法,将传统的6个电压矢量和6个磁链扇区细分成12个电压矢量和12个磁链扇区,并且制定了相应的开关表;通过Matlab对矢量细分的永磁同步电机直接转矩控制策略进行仿真实验,仿真结果表明该控制策略能够有效改善磁链轨迹,减小转矩脉动,提高系统的性能.

Direct Torque Control for Permanent Magnet Synchronous Motors Based on Vectors Subdivision

The traditional direct torque control scheme for permanent magnet synchronous motor using hexagonal or six circular interval flux control which leads defects such as large torque ripple.In view of them,vectors subdivision,which is the traditional six voltage vectors and six flux sectors subdivided into 12 voltage vectors and 12 flux sectors method,was adopted and the corresponding switch table was made.The strategy of vectors subdivision direct torque control is simulated by the Matlab.The results of simula...