scholarly journals Nonlinear Compensation Empyoing Matrix Converter with DTC Controller

2017 ◽  
Vol 7 (1) ◽  
pp. 107 ◽  
Author(s):  
Khalaf S. Gaied ◽  
Ziad H. Salih ◽  
Ahmed R. Ajel ◽  
Mehdi J. Marie
Keyword(s):  
Steady State ◽  
Simulation Analysis ◽  
Direct Torque Control ◽  
Induction Machine ◽  
Matrix Converter ◽  
Torque Control ◽  
Switching Frequency ◽  
The Matrix ◽  
Performance Specifications ◽  
State Error

This paper describes a nonlinear harmful speed and torque controller for fourth order induction motor model. The investigation of optimality and cost function for that base on estimation of Hammerstein-Wiener model with the compensated mathematical model. The matrix converter with direct torque control combination is efficient way to get better performance specifications in the industry.The MC and the DTC advantages are combined together.The reduction of complexity and cost of DC link in the DTC since it has no capacitors in the circuit. However, the controlling torque is a big problem it in DTC because of high ripple torque production which results in vibrations response in the operation of the IM as it has no PID to control the torque directly. The combination of MC with DTC is applied to reduce the fluctuation in the output torque and minimize the steady state error. This paper presents the simulation analysis of induction machine drives using Maltlab/Simulink toolbox R2012a. Design of constant switching frequency MCDTC drive,stability investigation and fault protection as well as controllability and observability with minimum steady state error has been carried out which  proved the effectiveness of the proposed technique.

scholarly journals Direct Power Control of Matrix Converter-Fed DFIG with Fixed Switching Frequency

2019 ◽  
Vol 11 (9) ◽  
pp. 2604 ◽  
Author(s):  
Arzhang Yousefi-Talouki ◽  
Shaghayegh Zalzar ◽  
Edris Pouresmaeil
Keyword(s):  
Power Control ◽  
Direct Torque Control ◽  
Matrix Converter ◽  
Torque Control ◽  
Switching Frequency ◽  
Direct Power ◽  
Direct Power Control ◽  
Reactive Component ◽  
Extensive Discussion ◽  
Induction Generators

In this paper, a direct power control (DPC) technique is proposed for matrix converter-fed grid-connected doubly fed induction generators (DFIGs). In contrast to what has been investigated in the past for direct torque control (DTC) or DPC of matrix converter-fed DFIGs, the active and reactive powers are regulated in a fixed switching frequency using indirect space vector modulation (ISVM) technique. Hence, designing input filters for matrix converters (MCs) becomes convenient. In addition, the reactive component of input side of MC is controlled which leads to reduction of distortion in grid current waveform. Also, an extensive discussion is addressed for nonlinear voltage errors of MC that may cause inaccurate power control. Simulation results done in MATLAB/Simulink show the effectiveness of the proposed method.

A computationally efficient torque and flux ripple reduction by active vector optimization approach using direct torque control–based model predictive torque control for matrix converter–fed permanent magnet synchronous motor

2022 ◽  
pp. 014233122110688
Author(s):  
JD Anunciya ◽  
Arumugam Sivaprakasam
Keyword(s):  
Permanent Magnet ◽  
Real Time ◽  
Permanent Magnet Synchronous Motor ◽  
Direct Torque Control ◽  
Synchronous Motor ◽  
Matrix Converter ◽  
Torque Control ◽  
Optimization Approach ◽  
The Real ◽  
The Matrix

The Matrix Converter–fed Finite Control Set–Model Predictive Control is an efficient drive control approach that exhibits numerous advantageous features. However, it is computationally expensive as it employs all the available matrix converter voltage vectors for the prediction and estimation. The computational complexity increases further with respect to the inclusion of additional control objectives in the cost function which degrades the potentiality of this technique. This paper proposes two computationally effective switching tables for simplifying the calculation process and optimizing the matrix converter active prediction vectors. Here, three prediction active vectors are selected out of 18 vectors by considering the torque and flux errors of the permanent magnet synchronous motor. In addition, the voltage vector location segments are modified into 12 sectors to boost the torque dynamic control. The performance superiority of the proposed concept is analyzed using the MATLAB/Simulink software and the real-time validation is conducted by implementing in the real-time OPAL-RT lab setup.

scholarly journals Imposed Switching Frequency Direct Torque Control of Induction Machine Using Five Level Flying Capacitors Inverter

2019 ◽  
Vol 21 (2) ◽  
pp. 241-248
Author(s):  
Abderrahmane Berkani ◽  
Karim Negadi ◽  
Tayeb Allaoui ◽  
Abdelkader Mezouar ◽  
Mouloud Denai
Keyword(s):  
Direct Torque Control ◽  
Induction Machine ◽  
Torque Control ◽  
Switching Frequency ◽  
Flying Capacitors

scholarly journals Performance Improvement of Matrix Converter Direct Torque Control System

Energies ◽  
2020 ◽  
Vol 13 (12) ◽  
pp. 3247
Author(s):  
Bowei Zou ◽  
Yougui Guo ◽  
Xi Xiao ◽  
Bowen Yang ◽  
Xiao Wang ◽  
...  
Keyword(s):  
Control Strategy ◽  
Control Method ◽  
Asynchronous Motor ◽  
Direct Torque Control ◽  
Torque Ripple ◽  
Matrix Converter ◽  
Torque Control ◽  
Theoretical Simulation ◽  
Existing Problems ◽  
The Matrix

In asynchronous motor direct torque control systems, the power supply using the matrix converter can achieve the effect of direct torque control and also has the advantages of the matrix converter. Nonetheless, direct torque control still has drawbacks in terms of pulsation. In this paper, the characteristics of direct torque control method and its existing problems are analyzed in depth. In view of the shortcomings of torque ripple, an improved scheme of torque tracking control is proposed based on conventional control methods. On the basis of theoretical simulation, DSP and FPGA algorithms are designed respectively in C language and VHDL to implement the proposed control strategy. Finally, a highly integrated experimental platform of matrix converter has been developed to verify the proposed control strategy. The simulation and experimental results verify the correctness and effectiveness of the improved scheme.

Improved Torque Control Performance in Direct Torque Control using Optimal Switching Vectors

2015 ◽  
Vol 5 (3) ◽  
pp. 441 ◽  
Author(s):  
Muhd Zharif Rifqi Zuber Ahmadi ◽  
Auzani Jidin ◽  
Maaspaliza Azri ◽  
Khairi Rahim ◽  
Tole Sutikno
Keyword(s):  
Induction Motor ◽  
Direct Torque Control ◽  
Induction Machine ◽  
Torque Ripple ◽  
Torque Control ◽  
Multilevel Inverter ◽  
Switching Frequency ◽  
Optimal Switching ◽  
Steady State Condition ◽  
Selection Of

This paper presents the significant improvement of Direct Torque Control (DTC) of 3-phases induction machine using a Cascaded H-Bidge Multilevel Inverter (CHMI). The largest torque ripple and variable switching frequency are known as the major problem founded in DTC of induction motor. As a result, it can diminish the performance induction motor control. Therefore, the conventional 2-level inverter has been replaced with CHMI the in order to increase the performance of the motor either in dynamic or steady-state condition. By using the multilevel inverter, it can produce a more selection of the voltage vectors. Besides that, it can minimize the torque ripple output as well as increase the efficiency by reducing the switching frequency of the inverter. The simulation model of the proposed method has been developed and tested by using Matlab software. Its improvements were also verified via experimental results.

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