全阶磁链观测和定子参考电压矢量预测的异步电动机SVM-DTC系统研究

Research on Space Vector Modulation-direct Torque Control for Asynchronous Motor Control Based on Full Order Flux Observation and Stator Reference Voltage Vector Calculation

针对传统直接转矩控制存在磁链和转矩脉动大的问题,提出了一种新的减小脉动的控制策略。通过全阶磁链观测和定子磁链期望增量估算计算出定子参考电压矢量,利用SVM技术获得基本电压空间矢量的优化组合,对转矩和磁链进行精确补偿。仿真结果验证了该算法的有效性。

To solve the problem of large flux and torque ripple in the conventional direct torque control （DTC）, a new control strategy to reduce the pulse was presented. With full order flux observation and the increment of stator flux calculation, the stator reference voltage vector was calculated. According to the current stator reference voltage vector which was modulated by SVM, optimum combination of the fundamental voltage space vector was obtained in order to accurately compensate the error of stator flux and torque. The simulation results verify the effectiveness of the method.