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Torque ripple analysis and dynamic performance of a space vector modulation based control method for AC-drives

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3 Author(s)
Tripathi, A. ; R&D Dept., Gen. Electr., Bangalore, India ; Khambadkone, A.M. ; Panda, S.K.

A constant switching frequency torque control method is presented in this paper, that uses flux error vector based space vector modulation (SVM) to achieve steady state and dynamic control of torque. The effect of SVM switching on torque ripple has been analyzed using "flux ripple vectors". This approach is used to develop an insight of torque ripple and to estimate it for any operating angular velocity. We propose a method of compensation to maintain steady state control of torque in the overmodulation region of operation. During torque dynamic, the optimum maximum switching state vector is selected. This gives a response similar to that obtained using direct torque control (DTC) and direct self control (DSC) methods. The proposed method is verified experimentally.

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Power Electronics, IEEE Transactions on  (Volume:20 ,  Issue: 2 )