摘要
提出一种新型的基于预测算法和变结构的矩阵变换器驱动感应电机无差拍直接转矩控制方法,变结构控制器产生负载角度变化值,并与定子磁链给定值送入基于预测算法的无差拍直接转矩控制器中,得到预测定子控制电压矢量,结合矩阵变换器双空间矢量调制方法,实现矩阵变换器开关频率恒定,并有效地减小了转矩脉动。实验结果表明,通过使用该方法,既可以保留传统矩阵变换器驱动感应电机直接转矩控制转矩快速响应的特点,又可以保证开关频率恒定和减小转矩脉动,有效地改善了系统的动静态性能。
This paper proposed a new deadbeat direct torque control strategy to improve the performance of induction motors driven by matrix converters using prediction algorithm and variable structure controller which causes the variation of the load angle,and delivers the estimated value of the stator flux to the deadbeat direct torque controller based on prediction algorithm to obtain the voltage vector controlled by the predictive stator.Combining with the modulation method of space vector,the constant switching frequency of matrix converters and low torque ripples were achieved.The experimental results showed that this novel direct torque control strategy can retain the advantage of fast torque response of the traditional direct torque control for induction motors driven by matrix converters,and in addition,guarantee constant switching frequency and reduce the torque ripples,so as to effectively improve the static and dynamic performance of the system.
出处
《中国电机工程学报》
EI
CSCD
北大核心
2010年第33期65-70,共6页
Proceedings of the CSEE
基金
国家重点基础研究发展计划项目(973项目)(2005CB221505)~~
关键词
矩阵变换器
感应电机
无差拍直接转矩
预测算法
变结构
matrix converter
induction motor
deadbeat direct torque control
predictive algorithm
variable-structure
