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A New Torque and Flux Controller for Direct Torque Control of Induction Machines

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3 Author(s)
Idris, N.R.N. ; Electr. Energy Conversion Dept., Universiti Teknologi Malaysia, Skudai ; Chuen Ling Toh ; Elbuluk, M.E.

This paper presents the implementation of a high-performance direct torque control (DTC) of induction machines drive. DTC has two major problems, namely, high torque ripple and variable switching frequency. In order to solve these problems, this paper proposed a pair of torque and flux controllers to replace the hysteresis-based controllers. The design of these controllers is fully discussed and a set of numerical values of the parameters for the proposed controllers is given. The simulation of the proposed controllers applied to the DTC drive is presented. The simulation results are then verified by experimental results. The hardware implementation is mainly constructed by using DSP TMS320C31 and Altera field-programmable gate array devices. The results prove that a significant torque and stator flux ripples reduction is achieved. Likewise, the switching frequency is fixed at 10.4 kHz and a more sinusoidal phase current is obtained

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Industry Applications, IEEE Transactions on  (Volume:42 ,  Issue: 6 )