Direct Torque Control Strategy Based on Constant Switching Frequency Applied in Current Source Inverter Fed Induction Motor Drive

2018 ◽  
Vol 6 (1) ◽  
pp. 30
Author(s):  
A. B. Nikolic
Keyword(s):  
Induction Motor ◽  
Control Strategy ◽  
Current Source ◽  
Direct Torque Control ◽  
Torque Control ◽  
Motor Drive ◽  
Switching Frequency ◽  
Induction Motor Drive ◽  
Current Source Inverter ◽  
Torque Control Strategy

scholarly journals Direct Torque Control for Three-Level Neutral Point Clamped Inverter-Fed Induction Motor Drive

2012 ◽  
Vol 2 (2) ◽  
pp. 201-208 ◽  
Author(s):  
M. K. Sahu ◽  
A. K. Panda ◽  
B. P. Panigrahi
Keyword(s):  
Induction Motor ◽  
Direct Torque Control ◽  
Torque Ripple ◽  
Neutral Point ◽  
Torque Control ◽  
Control Technique ◽  
Motor Drive ◽  
Switching Frequency ◽  
Induction Motor Drive ◽  
Space Vector

Direct torque control (DTC) is a control technique in AC drive systems to obtain high performance torque control. The classical DTC drive contains a pair of hysteresis comparators and suffers from variable switching frequency and high torque ripple. These problems can be solved by using space vector depending on the reference torque and flux. In this paper the space vector modulation technique is applied to the three-level Neutral Point Clamped (NPC) inverter control in the proposed DTC-based induction motor drive system, resulting to a significant reduce of torque ripple. Three-level neutral point clamped inverters have been widely used in medium voltage applications. This type of inverters have several advantages over standard two-level VSI, such as greater number of levels in the output voltage waveforms, less harmonic distortion in voltage and current waveforms and lower switching frequencies. This paper emphasizes the derivation of switching states using the Space Vector Pulse Width Modulation (SVPWM) technique. The control scheme is implemented using Matlab/Simulink. Experimental results using dSPACE validate the steady-state and the dynamic performance of the proposed control strategy.

scholarly journals Direct Torque Control of Induction Motors using Speed Estimator

2021 ◽  
Vol 9 (6) ◽  
pp. 623-626
Keyword(s):  
Induction Motor ◽  
Direct Torque Control ◽  
Torque Control ◽  
Motor Drive ◽  
Switching Frequency ◽  
Induction Motor Drive ◽  
Computational Calculations ◽  
Speed Estimator ◽  
Vector Modulation ◽  
Hysteresis Control

A new approach to Direct torque control of induction motor is presented in this paper.A ripple in torque of the induction motor is a very common problem and it is to bereduced. In conventionalDTCmethodstheinverter has constant switching frequency and is dramatically increased. In proposed DTC based induction motor drive, an improved space vector modulation technique is applied to inverter control, therefore reducingthe torque/speed ripples. As the proposed approach does not include any dead beat control or hysteresis control, it automatically reduces computational calculations. Simulation results of proposed DTC based induction motor drive technique is validated using MATLAB/SIMULINK environment

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