异步电动机直接转矩控制低速性能改善研究

针对传统直接转矩控制低速运行时定子电流畸变、转矩脉动大的特点，推导了磁链和转矩控制公式，研究了十二扇区细分优化控制方法.并依据理论和Matlab仿真实验，比较了六扇区和十二扇区直接转矩控制定子磁链和电磁转矩性能，仿真结果证明了低速时十二扇区控制方法有更好的表现。

Study of induction motor direct torque control with improving low speed performance

In order to overcome the direct torque control shortcoming with torque ripple and current deformation at low speed condition, the flux and torque formula are deduced to analyze the defect of traditional six section control, and twelve section subdivision control method are also studied.The theoretical and experimental analysis compares the performance of these two section control methods.The simulation results verify the better performance of twelve section control method at low speed operation with reduced...