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Direct flux and torque control of three phase induction motor drive using PI and fuzzy logic controllers for speed regulator and low torque ripple

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2 Author(s)
Ramesh, T. ; Dept. of Electr. Eng., Nat. Inst. of Technol., Rourkela, India ; Panda, A.K.

This paper presents a direct flux and torque control (DTC) of three phase induction motor drive (IMD) using PI and fuzzy logic controller (FLC) for speed regulator (SR) and low torque ripples. This control method is based on DTC operating principles. The DTC is one of the most excellent direct control strategies of stator flux and torque ripples of IMD. The conventional DTC method has been optimized by using PI controller in the speed regulating loop of IMD. The main drawback with the conventional DTC of IMD is high stator flux and torque ripples and the speed of IMD is reducing under transient and dynamic state of operating condition. This drawback was reduced using with the proposed control technique. In this proposed control technique the PI controller is regulating the speed of the IMD and the FLC is reducing the stator flux and torque ripples. The DTC is achieved by reference of stator flux hysteresis band which is generates from instantaneous actual and reference stator fluxes and the reference of torque hysteresis band which generates from FLC. The amplitude of the reference stator flux is kept constant at rated value. The proposed DTC technique gives better performance in the three-phase IMD than conventional DTC technique. The simulation results of both conventional and proposed control technique is presented, compared, and confirmed by the simulation results and found that the low stator flux, torque ripples and good speed regulator with the proposed DTC technique using MATLAB/SIMULINK.

Published in:

Engineering and Systems (SCES), 2012 Students Conference on

Date of Conference:

16-18 March 2012