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《Electric Machines and Control》 2008-05
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Comparison between two kinds of reducing torque ripple of based on direct torque control

ZHANG Ai-ling,WANG Zhen-yu,YANG Wen-jie (Electrical Power Engineering College,Taiyuan University of Technology,Taiyuan 030024,China)  
The study of reducing torque ripple of induction motor direct torque control(DTC) in the low-speed was conducted by using discrete space vector modulation(DSVM) and torque prediction technology,and switching table of DSVM has been optimized.Each sampling period was divided into three equal time intervals,and a voltage vector was applied at each interval,that is,a single non-zero voltage vector and zero-voltage vector replaced the combination of non-zero voltage vector and non-zero voltage vector,which simplified the switch table,reduced the switching frequency and ensured a low-speed carrying capacity.On the basis of that,the experimental results were contrasted.The results showed that compared with the torque prediction,optimized DSVM makes control effect in reducing the low-speed torque ripple better,improves the current and flux wave,and maintains a dynamic torque of the advantages of fast response.
【CateGory Index】: TM921.5
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