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A dead-beat type digital controller for the direct torque control of an induction motor

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3 Author(s)
Joong-Hui Lee ; Dept. of Electr. Eng., Korea Adv. Energy Res. Inst., Daejeon, South Korea ; Chang-Gyun Kim ; Myung-Joong Youn

In this paper, a dead-beat type digital controller has been introduced to overcome the problems of a conventional direct torque controller. The proposed induction motor drive with a digital dead-beat controller shows good transient response and negligible steady-state error even at a low switching frequency, which is needed for high power machines used for transportation. Including the rotor dynamics, the stability condition and steady-state error of the proposed control system have been examined in the z-plane. In addition, the good performance has been verified through the simulation and experiment. The flux and torque controllers have been designed with only stator voltage equations in the stator flux reference frame in order to take advantages of the direct torque control. Therefore, the proposed flux and torque controllers have simple forms and can be easily designed and implemented.

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Power Electronics, IEEE Transactions on  (Volume:17 ,  Issue: 5 )