Implementation of a new fast direct torque control algorithm for induction motor drives

Zaid, Sherif A.; Mahgoub, O.A.; El-Metwally, K.A.

doi:10.1049/iet-epa.2009.0059

Cited by 46 publications

(39 citation statements)

References 10 publications

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“…To explain this, at first, an equation of torque rate in terms of applied voltage vector which was derived in [15] will be used.…”

Section: Dtc With Constant Switching Frequency Scheme (Dtc-csf)mentioning

confidence: 99%

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Simple Dynamic Overmodulation Strategy for Fast Torque Control in DTC of Induction Machines with Constant Switching Frequency Controller

Jidin¹,

Idris²,

Yatim³

et al. 2010

2010 IEEE Industry Applications Society Annual Meeting

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This paper presents a simple dynamic overmodulation method to obtain a fast dynamic torque response in DTC of induction machines with constant switching frequency controller. A fast dynamic torque response can be obtained by switching only the most optimized voltage vector during torque dynamic condition. The optimized voltage vector can be identified by comparing the rate of change of torque produced between applications of two possible active voltage vectors, according to the flux position. The selection of the optimized voltage vector can be simply implemented by modifying the flux error status before it is being fed to the look-up table. It will be shown that, the proposed switching strategy facilitates the DTC to perform under six-step mode to achieve the fastest dynamic torque response. The effectiveness of the proposed dynamic overmodulation to obtain the fast torque response is verified with some experimental results Index Terms--Dynamic overmodulation, direct torque control (DTC), induction machine, hysteresis controller.

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“…To explain this, at first, an equation of torque rate in terms of applied voltage vector which was derived in [15] will be used.…”

Section: Dtc With Constant Switching Frequency Scheme (Dtc-csf)mentioning

confidence: 99%

“…According to the analysis in [15], the rate of change of torque at the instant in which a voltage vector is applied is given by:…”

Section: Dtc With Constant Switching Frequency Scheme (Dtc-csf)mentioning

confidence: 99%

Simple Dynamic Overmodulation Strategy for Fast Torque Control in DTC of Induction Machines with Constant Switching Frequency Controller

Jidin¹,

Idris²,

Yatim³

et al. 2010

2010 IEEE Industry Applications Society Annual Meeting

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“…As demonstrated, both torque and flux of direct torque control based drive, are controlled in the manner of closedloop system. More recently, several variations and improvements have been made for this control [2][3][4][5][6], which is based on non-linear hysteresis controller used in both torque and flux control loops. Since the beginning, this technique was characterized by simplicity, good performance and robustness.…”

Section: Introductionmentioning

confidence: 99%

Optimized Torque Control via Backstepping Using Genetic Algorithm of Induction Motor

et al. 2016

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Original scientific paperThis paper proposes a novel hybrid control of induction motor, based on the combination of the direct torque control DTC and the backstepping one, optimized by Genetic Algorithm (GA). First the basic evolution of DTC is explained, where the torque and stator flux are controlled by non linear hysteresis controllers which cause large ripple in motor torque at steady state operation. A Backstepping control is applied to overcome these problems, however the used parameters are often chosen arbitrarily, which may affect the controller quality. To find the best parameters, an optimization technique based on genetic algorithm is used. Also, in order to obtain accurate information about stator flux, torque and load torque, open loops estimators are used for this Backstepping control. At last, experimental results are presented in order to prove the efficiency of the above mentioned control technique. Key words: induction motor, backstepping control, DTC, genetic algorithmsOptimizirano povratnokoračno upravljanje momentom indukcijskog motora korištenjem genetičkog algoritma. U ovom radu predstavljena je nova metoda hibridnog upravljanja indukcijskim motorom, bazirana na kombinaciji direktnog upravljanja momentom (DCT) i povratnokoračnog upravljanja, te optimizirana korištenjem genetičkog algoritma (GA). Prvo je objašnjena osnova razvoja DCT-a, gdje se momentom i tokom statora upravlja nelinearnim histereznim regulatorima što uzrokuje velike propade u momentu motora tijekom ravnotežnog rada. Povratnokoračno upravljanje se primjenjuje kako bi se uklonio ovaj problem, me utim korišteni parametri su najčešće proizvoljno odabrani što može utjecati na kvalitetu upravljanja. Kako bi se našli najbolji parametri koristi se tehnika optimizacije zasnovana na genetičkom algoritmu. Tako er kako bi se dobili točni podaci o toku statora, momentu i momentu opterećenja potrebni za povratnokoračno upravljanje koriste se estimatori u otvorenoj petlji. Na kraju su prikazani eksperimentalni rezultati kako bi se dokazala efikasnost navedene metode upravljanja.

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“…The utilization of variable frequency induction motor drives (VFIMDs) possesses additional improved on account of their functionality to accomplish good dynamic overall performance making use of vector control (or field oriented control-FOC) and direct torque and flux control (DTC) [3]. With these control techniques, induction motor drives may attain equivalent as well as much better performance as compared with dc motor drives.…”

Section: Introductionmentioning

confidence: 99%

Investigation of Various Levels of Cascade Multi-Level Inverter DVR for Improve Power Quality of Induction Motor Drive

Karan¹

2014

Proceedings of 1st International E-Conference on Energies

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This paper presents a direct torque control (DTC) of induction motor drive (IMD) using Different levels of Cascade Multilevel DVR. The DTC is one of the most excellent strategies of flux ripples control and torque of IMD. The main drawback of the DTC of IMD using conventional PI controller based SR is high torque, stator flux ripples and speed of IMD is decreasing under transient and steady state operating conditions. This drawback was eliminated using In front of DTC IM drive connected Different levels of Cascade Multilevel DVR. The main objective of this paper is to present an approach capable of performing fast torque response and harmonics reduction in DTC drive. Because of that, an efficient control strategy is applied, is needed to reduce the voltage fluctuations like sag and swell conditions and also to reduce current and voltage harmonics in the DTC drive system. In this paper, the work proposed is aimed at obtaining results exhibiting improved THD contents of 5, 7 and 9 level cascade multilevel inverters at the ac mains and reduced the Torque ripples of the DTC IMD Drive.

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Implementation of a new fast direct torque control algorithm for induction motor drives

Cited by 46 publications

References 10 publications

Simple Dynamic Overmodulation Strategy for Fast Torque Control in DTC of Induction Machines with Constant Switching Frequency Controller

Simple Dynamic Overmodulation Strategy for Fast Torque Control in DTC of Induction Machines with Constant Switching Frequency Controller

Optimized Torque Control via Backstepping Using Genetic Algorithm of Induction Motor

Investigation of Various Levels of Cascade Multi-Level Inverter DVR for Improve Power Quality of Induction Motor Drive

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