Abstract

The asynchronous or Induction Motor (IM) is one of the most widely used electrical machines in the world, due to the three following advantages namely 1.Their construction is simple and rugged 2.The absence of slip rings, commutators and brushes make it cheaper, and 3.It is also maintenance free compared to DC motors and Synchronous motor due to wear and tear of brushes, slip rings and commutators respectively. The Section 1 deals with the introduction of induction motor and Direct Torque Control scheme. Section 2 briefly discusses the types of Induction motor. Section 3 tells about the control strategies of Induction motor respectively scalar control and vector control, and also briefly explains about Direct Torque Control (DTC) method. The Section 4 discuss about the Types of Control Strategies for Torque ripple Reductions in DTC as well as the two proposed schemes namely 1.Fuzzy Logic Controller (FLC) for DTC-SVM and 2.Artificial Neural Network (ANN) controller for DTC-SVM respectively for IM and its results, The two proposed schemes uses Hybrid Asymmetric Space Vector Pulse Width Modulation (HASVPWM) for switching the inverter. The Section 5 revels about the modern advanced techniques such as ANN and FLC based DTC.

Highlights

  • The electric motors are electromechanical machines, which are used for the conversion of electrical energy into mechanical energy

  • The Direct torque control of induction motors based on discrete space vector modulation using adaptive sliding mode control was proposed by Ben Salem and Derbel [3], the results shows the effectiveness and the robustness of the Direct Torque Control (DTC)- discrete Space Vector Modulation (SVM) adaptive sliding mode control of induction motors

  • It is suited to very fast torque and flux controlled drives because of its short sampling time which is required by the switching table DTC schemes [10]

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Summary

Introduction

The electric motors are electromechanical machines, which are used for the conversion of electrical energy into mechanical energy. The variations of induction motor parameters is shown by Ben Salem and Derbel in their subsequent two publications namely Performance Analysis of DTC-SVM Sliding Mode Controllers-Based on Estimator of Electric Motor Speed Drive [4], and DTCSVM Based Sliding Mode Controllers with Load Torque Estimators for Induction Motor Drives [5] respectively. The advantages of this direct torque control method is improved efficiency and fast response of torque in dynamic conditions [6, 7]

Types of induction motor
Classification of IM control strategies
Problems in conventional DTC
Types of control strategies for torque ripple reductions in DTC
Modification in switching tables
Improvement in switching table
Modified classical DTC
Dither signal injection
Deadbeat control
SVM-DTC
Types of SVM-DTC
Proposed artificial intelligent schemes for DTC-SVM
Fuzzy logic controller for HASVPWM
Artificial neural network controller for HASVPWM
Simulation results and discussion
Fuzzy logic control (FLC)
Artificial neural network (ANN)
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