用十二区段法抑制低速时直接转矩的电磁振动

Elimination of Direct Torque Vibration Under Low Speed by Means of Twelve-section Control Methods

针对低速时直接转矩控制下电机电磁振动较大的问题。运用转矩和磁链解耦的方法对电机电磁转矩和磁链的运动规律对其进行了分析,并从切向力和径向力两方面分析了电机的振动和转矩磁链的关系,提出使用十二区段法来来减小转矩和磁链的非线性变化,从而减小了电机由电磁力引起的振动。使用Matlab搭建十二区间直接转矩下的电机的振动模型,验证了使用该法降低直接转矩控制下电机电磁振动的可行性。

Against the problem of great vibration of direct torque under low rotating speed, the motion law of magnetic torque and flux linkage was analyzed by means of the torque-flux linkage-decoupling method. And then, the relationship between the motor vibration and torque-flux linkage was studied in the fields of both axial and radial force. The twelve-section control method was proposed for reducing the nonlinear change of the torque and flux linkage, so as to eliminate the motor vibration caused by electromagnetic force. The vibration model of the motor under low speed established by the twelve-section control method proved the possibility of elimination of the vibration.