Temat: direct torque control

Skocz do pozycji: 1.

Tytuł:: Comparative analysis of chosen field weakening methods for the space vector modulated - direct torque controlled drive system
Autorzy:: Nguyen Thac, K.
Orłowska-Kowalska, T.
Tematy:: induction motor
direct torque control
field weakening
optimal control; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/1807724.pdf Link otwiera się w nowym oknie
Opis:: This paper presents a new simple field weakening (FW) strategy for the Direct Torque Control (DTC) of the induction motor (IM). Based on the Space Vector Modulated - Direct Torque Control (SVM- DTC) scheme, an analysis and comparison of conventional (1/ωm) and proposed method are presented for a whole speed range including FW regions. The proposed strategy is verified through simulation with a 1.5 kW induction motor drive.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Improved direct torque control of induction motors using adaptive observer and sliding mode control
Autorzy:: Kouchih, D
Tadjine, M.
Boucherit, M. S.
Tematy:: adaptive observer
direct torque control
induction motor
sensorless
sliding mode control; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/229910.pdf Link otwiera się w nowym oknie
Opis:: This paper presents the synthesis of an adaptive observer which is used for the improvement of the direct torque control of induction motor drives. The observer detects stator flux components in two-phase stationary reference frame, rotor speed and stator resistance by measure of the stator terminal voltages and currents. The observer is adapted using a simple algorithm which does not imply a high computational load. Stability analysis based on Lyapunov theory is performed in order to guarantee the closed loop stability. Simulation tests under load disturbance and stator resistance variation are provided to evaluate the consistency and performance of the proposed control technique in the low and high speeds.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Control of the DTC-FSVM based induction motor drive in a wide speed range
Autorzy:: Nguyen Thac, K.
Orlowska-Kowalska, T.
Tematy:: induction motor
direct torque control
Flux-Space-Vector Modulation
field weakening control; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/1817721.pdf Link otwiera się w nowym oknie
Opis:: In this paper the direct flux and torque control structure based on Flux-error Space Vector Modulation (DTC-FSVM) has been analyzed and compared to a classical DTC-SVM system. The control structures have been tested in a wide speed range including field weakening algorithm based on the voltage and current limits of the voltage inverter and the induction motor. The proposed control strategies are verified through simulation with a 3 kW induction motor drive.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 4.

Tytuł:: Synchronous reluctance machine drive control with fast prototyping card implementation
Autorzy:: Burlikowski, Wojciech
Kielan, Paweł
Kowalik, Zygmunt
Tematy:: direct torque control
fast prototyping card
Hamiltonian machine model
synchronous reluctance motor; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/949906.pdf Link otwiera się w nowym oknie
Opis:: The Synchronous Reluctance Machine (SynRM) is an electrical machine in which the useful electromagnetic torque is produced due to rotor saliency. Its high powerand torque-to-mass ratio and very good efficiency make it a cheap and simple alternative for permanent magnet or induction motors, e.g. in electromobility applications. However, because of magnetic nonlinearities, the rotational speed and torque control of a SynRM is a nontrivial task. In the paper, a control algorithm based on a Hamiltonian mathematical model is presented. The model is formulated using measurement results, obtained by the drive controller. An algorithm is tested in the drive system consisting of a SynRM with the classical rotor and a fast prototyping card. The drive dynamic response in transient states is very good, but the proposed algorithm does not ensure the best efficiency after steady state angular velocity is achieved.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 5.

Tytuł:: Analiza metody DTC w układzie sterowania falownikowym napędem trakcyjnym
Analysis of traction inverter drive system with DTC control method
Autorzy:: Stefański, T.
Tematy:: metoda DTC
układ sterowania
falownikowy napęd trakcyjny
DTC method
control system
Direct Torque Control; Pokaż więcej
Wydawca:: Instytut Naukowo-Wydawniczy "SPATIUM"
Powiązania:: https://bibliotekanauki.pl/articles/316455.pdf Link otwiera się w nowym oknie
Opis:: Analizowano problemy sterowania momentem i prędkością kątową napędu falownikowego z silnikiem indukcyjnym, w którym zastosowano metodę bezpośredniego sterowania momentem i strumieniem (DTC). Celem analizy była ocena tej metody sterowania pod kątem zastosowania do napędu trakcyjnego. Analizowano także problem modelowania matematycznego i identyfikacji parametrycznej falownikowego napędu trakcyjnego. Do identyfikacji parametrycznej modelu matematycznego napędu zastosowano numeryczną metodę optymalizacji statycznej Box’a (metoda complex). W badaniach identyfikacyjnych zastosowano pobudzenie silnika pulsacją synchroniczną, pulsacją poślizgu oraz amplitudą napięcia stojana. Wpływ sygnału pobudzającego na wartości identyfikowanych parametrów przedstawiono na podstawie badań laboratoryjnych. Wykazano, że plan eksperymentu i zastosowany sygnał pobudzający w znacznym stopniu decydują o wynikach identyfikacji, czyli o dokładności opisu rzeczywistych zjawisk w silniku przez model matematyczny. Zmiany wartości identyfikowanych parametrów są więc spowodowane nie tylko zmianami wartości rzeczywistych parametrów silnika, ale także błędami identyfikacji. Badania laboratoryjne przeprowadzono w układzie napędowym z silnikiem o mocy 2,5 kW.
The problems of torque and angular velocity control of traction inverter drive system using a Direct Torque Control (DTC) method were considered in the paper. The problem of mathematical modelling and parameter identification of traction drive system with ac motor was also analysed. The numerical Box’s method of static optimisation has been applied in parametric identification of the motor parameters. In identification studies excitation signal of synchronous frequency, slip frequency and amplitude of the stator voltage were used. The influence of the excitation signal on identified parameter values was proved in laboratory tests. The experimental investigations have been carried out using the drive systems equipped with 2,5 kW motor.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 6.

Tytuł:: Maximum Torque Control of 3-phase induction motor drives
Autorzy:: Wach, P.
Tematy:: induction motor control
angular velocity control
direct torque control
field oriented control
DC-AC power converters
Maximum Torque Control; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/141618.pdf Link otwiera się w nowym oknie
Opis:: Maximum Torque Control (MTC) is a new method applied for control of induction motor drives. The drive is controlled by dc voltage supplying a converter in the range below nominal speed and by a field that weakens for a speed range above the nominal speed. As a consequence, the control is quite similar to the control of a classical separately excited dc motor. This control method could be explained as a kind of simplification of Direct Torque Control (DTC), because the switching scheme is the same as for the DTC, but the variable responsible for a torque control is constantly set for “torque increase”. This kind of control of induction motor drive is simpler than DTC because torque values need not be estimated. The proposed control method offers very good performance for 3-phase induction motors and requires smaller switching frequency in comparison to DTC and Field Oriented Control (FOC). The application of the control is widely demonstrated for a 3-phase 315 kW, 6 kV motor drive by use of computer simulation.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 7.

Tytuł:: Backstepping/DTC control of a double star synchronous machine drive
Autorzy:: Boudana, D.
Nezli, L.
Tlemcani, A.
Mahmoudi, M. O.
Djemai, M.
Tadjine, M.
Tematy:: double star synchronous machine
direct torque control
backstepping/DTC
space vector modulation
robustness; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/229805.pdf Link otwiera się w nowym oknie
Opis:: Direct torque control (DTC) allows for very high quality torque control without a need for current controllers tuning or using coordinate transformation. However, barge torque ripples arise as well as inconstant inverter switching frequency due to the hysteresis of comparators. This paper present a backstepping/DTC control based on the space vector modulation (SVPWM) for double star synchronous machine (DSSM) to reduce the torque, flux, current and speed pulsations during steady state. By the coordinate transformation the DSSM models are presented in view of control. Then a conventional DTC is developed to get a decoupled system and a PI controller is designed to control the speed. To improve the static and dynamic control performance of the DSSM, the speed controller is designed using a backstepping/DTC procedure in conjunction with SVPWM. Simulation results with the conventional DTC and proposed backstepping/DTC are presented and compared. Results show the effectiveness and the robustness of the approach proposed.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 8.

Tytuł:: An Investigation of Direct Torque Control and Hysteresis Current Vector Control for Motion Control Synchronous Reluctance Motor Applications
Autorzy:: Vajsz, Tibor
Számel, László
Handler, Árpád
Tematy:: synchronous reluctance motor
electric drive
direct torque control
current vector control
frequency converter
motion control
industrial drives; Pokaż więcej
Wydawca:: Politechnika Wrocławska. Oficyna Wydawnicza Politechniki Wrocławskiej
Powiązania:: https://bibliotekanauki.pl/articles/1193685.pdf Link otwiera się w nowym oknie
Opis:: Synchronous reluctance motor drives are one of the most attractive alternatives of permanent magnet synchronous motor drives and induction motor drives in the field of conventional industrial and household applications. This tendency is expected to be continued in the case of motion control applications as well. This article investigates two torque-control algorithms that are possible candidates for motion control synchronous reluctance motor applications. The examined torque-control algorithms are direct torque control (DTC) and hysteresis current vector control (HCVC).
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 9.

Tytuł:: Energy characteristics of a DC hybrid generator for a squirrel-cage asynchronous machine
Autorzy:: German-Galkin, Sergey
Tematy:: energy efficiency
DC hybrid generator sets
active rectifier
field-oriented control
direct torque control
Simscape Power System package; Pokaż więcej
Wydawca:: Akademia Morska w Szczecinie. Wydawnictwo AMSz
Powiązania:: https://bibliotekanauki.pl/articles/1819206.pdf Link otwiera się w nowym oknie
Opis:: Analytical research methods to determine the power characteristics of generator sets with vector control in an asynchronous squirrel-cage machine were developed and used to calculate the energy characteristics of generator sets with the field-oriented control (FOC) and direct torque control (DTC). The analytical calculations showed that a generator set with direct torque control had slightly better energy characteristics. Confirmation of the analytical calculation results was carried out using simulation models developed in the MATLAB-Simulink package with an environment Simscape Power System.
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 10.

Tytuł:: Sensorless DTC of induction motor using improved neural network switching state selector controller
Autorzy:: Messaif, I.
Berkouk, E. M.
Saadia, N.
Tematy:: direct torque control
NPC three-level inverter
switching table
neural point potential
neural networks
induction motor; Pokaż więcej
Wydawca:: Polska Akademia Nauk. Czytelnia Czasopism PAN
Powiązania:: https://bibliotekanauki.pl/articles/229864.pdf Link otwiera się w nowym oknie
Opis:: The paper deals with development of sensorless Direct Torque Control (DTC) system based on neural network. This network is built to solve the task of proper switching states selection based on information about electromagnetic torque and stator flux (position and magnitude) of induction motor. In fact, this technique which uses conventional switching table is not convenient for one-line and real time control for its high computation time. In order to avoid this problem a solution based on neural network is proposed. Well trained Artificial Neural Network structure can replace successfully the switching table. However, in the Neutral-Point-Clamped topology, it has an inherent problem of Neutral Point Potential (NPP) variation. In this way, a Neural Network-Direct Torque Control technique has been applied and the estimated value of the Neutral Point Potential is used, which is calculated by motor currents. This control strategy offers the possibility of selecting appropriate switching state to achieve the control of Neutral Point Potential. Simulation results verify the validity of the proposed method.
Dostawca treści:: Biblioteka Nauki

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