Novel direct torque control (DTC) scheme with fuzzy adaptive torque-ripple reduction

Romeral, L.; Arias, A.; Aldabas, E.; Jayne, M.G.

doi:10.1109/tie.2003.812352

Cited by 127 publications

(72 citation statements)

References 5 publications

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“…To obtain an improved combined vector and Direct torque control during start-up or during changes in the reference flux and torque, a fuzzy logic controller is proposed and introduced to replace the switching table for more advantages [24][25][26]: Torque ripple minimization, current distortion reduction and switching frequency stabilization.…”

Section: Improved Combined Vector Control and Direct Torque Controlmentioning

confidence: 99%

Intelligent Control for Torque Ripple Minimization in Combined Vector and Direct Controls for High Performance of IM Drive

Boulghasoul¹,

Elbacha²,

Elwarraki³

2012

Journal of Electrical Engineering and Technology

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-In Conventional Combined Vector and Direct Controls (VC-DTC) of induction motor, stator current is very rich in harmonic components. It leads to high torque ripple of induction motor in high and low speed region. To solve this problem, a control method based on the concept of fuzzy logic approach is used. The control scheme proposed uses stator current error as variable. Through the fuzzy logic controller rules, the choice of voltage space vector is optimized and then torque and speed are controlled successfully with a less ripple level in torque response, which improve the system's performance. Simulation results trough MATLAB/SIMULINK® software gave results that justify the claims.

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Section: Improved Combined Vector Control and Direct Torque Controlmentioning

confidence: 99%

Intelligent Control for Torque Ripple Minimization in Combined Vector and Direct Controls for High Performance of IM Drive

Boulghasoul¹,

Elbacha²,

Elwarraki³

2012

Journal of Electrical Engineering and Technology

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“…This equation shows that when the term RsIs can be neglected, (in high speed operating condition for example), the extremity of stator flux vector Vs. Furthermore, the instantaneous flux speed is only governed by voltage vector amplitude [1] [4]. …”

Section: B Stator Flux and Torque Estimationmentioning

confidence: 99%

“…However it has some draw backs like torque ripple, variable switching frequency, electromagnetic compatibility due to high frequency harmonic current and voltage. In recent years, research is going on DTC for multi level converters [5,6,9] attractive solution for high power applications, due to higher voltage operation capability, reduced common mode voltages, near sinusoidal outputs, low dv/dt's and smaller or even no output filter [4]. The most attractive features of this technology are in the medium to high-voltage application range (2-13 kV), which include motor drives, power distribution, power quality and power conditioning applications [13].…”

Section: Introductionmentioning

confidence: 99%

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Simulation and Comparison of 2-L & 3-L Inverter Fed Induction Motor DTC Drives

Sekhar¹,

Sekhar²

2011

IJCEE

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Abstract-Direct I. INTRODUCTIONInduction motors are the most widely used alternative in adjustable speed drives. Field Oriented Control (FOC) [1], and Direct Torque Control (DTC) [2,3] have emerged as the standard industrial solutions for high dynamic performance operation of these machines.In particular DTC offers attractive performance in terms of fast torque response, simple and less computational cumbersome control schemes, robustness against parameter variation, no need of PWM modulator and current regulators. However it has some draw backs like torque ripple, variable switching frequency, electromagnetic compatibility due to high frequency harmonic current and voltage. In recent years, research is going on DTC for multi level converters [5,6,9] attractive solution for high power applications, due to higher voltage operation capability, reduced common mode voltages, near sinusoidal outputs, low dv/dt's and smaller or even no output filter [4]. The most attractive features of this technology are in the medium to high-voltage application range (2-13 kV), which include motor drives, power distribution, power quality and power conditioning applications [13]. One of the advantages of multilevel inverters is that the voltage stress on each switching device is reduced. In addition, multilevel waveforms feature have less harmonic content compared to two level waveforms operating at the same switching frequency .In multi level inverters, it is easy to reach high voltage levels in high power applications with lower harmonic distortion and switching frequency, which is very difficult to get this performance with conventional two level inverters. The high-voltage switches are rather expensive, the employment of the double number of the cheaper switches are often economical favorable. Simultaneously the less IM current and torque distortions can be achieved by using of the more number of the feasible inverter states [9].In this paper two different DTC schemes will be compared with each other. These two schemes are DTC-SVM with two-level inverter and DTC-SVM with threelevel inverter. The Proposed scheme is described clearly and simulation results are reported to demonstrate its effectiveness. The entire control scheme is implemented with Matlab/Simulink. II. DTC-SVM WITH TWO-LEVEL INVERTER A. Vector Model of Inverter Output VoltageIn the PWM voltage source inverters, considering the combinations of the states of switching functions inverter switching state functions (C1, C2, and C3) which can take either 1 or 0, the voltage vector becomes.Eight switching combinations can be taken according to the above relationship: two zero voltage vectors and six non-zero voltage vectors show by Fig.2 [1][2]. B. Stator Flux and Torque EstimationThe components of the current (Isα, Isβ), and stator voltage (Vsα, Vsβ) are obtained by the application of the transformation given by (5) and (6)

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“…During the last decade, a lot of modifications in classic Direct Torque Control scheme (Takahashi & Noguchi, 1986) have been made (Casadei et al, 2000), (Reddy et al, 2006), (Chen et al, 2005), (Grabowski et al, 2005), (Romeral et al, 2003), (Ortega et al, 2005). The objective of these modifications was to improve the start up of the motor, the operation in overload conditions and low speed region.…”

Section: Introductionmentioning

confidence: 99%

Direct torque control using space vector modulation and dynamic performance of the drive, via a fuzzy logic controller for speed regulation

Koutsogiannis

Adamidis

Fyntanakis

2007

2007 European Conference on Power Electronics and Applications

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Novel direct torque control (DTC) scheme with fuzzy adaptive torque-ripple reduction

Cited by 127 publications

References 5 publications

Intelligent Control for Torque Ripple Minimization in Combined Vector and Direct Controls for High Performance of IM Drive

Intelligent Control for Torque Ripple Minimization in Combined Vector and Direct Controls for High Performance of IM Drive

Simulation and Comparison of 2-L & 3-L Inverter Fed Induction Motor DTC Drives

Direct torque control using space vector modulation and dynamic performance of the drive, via a fuzzy logic controller for speed regulation

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