摘要
针对传统的直接转矩控制转矩脉动大、开关频率不恒定等问题,提出了一种基于SVPWM技术的新型直接转矩控制系统,并利用MATLAB/SIMULINK仿真软件建立了系统模型。系统采用PI控制器调节磁链和转矩,可以得到能够准确补偿磁链和转矩的参考电压矢量。逆变器的开关状态由SVPWM控制,可以保持逆变器开关频率恒定。实验结果表明该设计是正确的,并能有效的减小磁链和转矩脉动,保持开关频率固定,改善控制系统的性能。
To solve the problems of large torque tipple and inconstant inverter switching frequency in the conventional direct torque controI,A novel DTC method using space vector pulse width modulation（SVPWM） is proposed and modeled in the MAT- LAB/SlMULINK.PI controllers regulate the flux and torque respectively.The synthesized reference voltage vector that could exactly compensate current flux and torque errors is generated by PI controllers.The switch state of inverter is controlhed by the SVPWM technique in the proposed DTC system,it maintains a fixed switching frequency.Simulation results show the validity of the proposed DTC system.
出处
《工业控制计算机》
2014年第4期74-75,77,共3页
Industrial Control Computer
关键词
感应电机
直接转矩控制
PI调节
空间矢量脉宽调制
induction machine,direct torque controI,PI regulation,space vector pulse width modulation
