scholarly journals Improvement of Flux Regulation with Adaptive PI Controller and DTHB based Direct Torque Control of Induction Machine

2019 ◽  
Vol 9 (1) ◽  
pp. 4372-4376
Keyword(s):  
Control Strategies ◽  
Direct Torque Control ◽  
Induction Machine ◽  
Pi Controller ◽  
Torque Control ◽  
Lookup Table ◽  
Low Speed ◽  
Dynamic Hysteresis ◽  
Error Range ◽  
Small Alteration

This paper presents an adaptive PI based two control strategies of Dynamic Hysteresis Torque Band (DHTB) for improving flux regulation at low speed and zero speed in lookup table based Direct Torque Control (DTC) of an Induction Machine (IM). This is achieved by varying the band value of torque dynamically but it is limited with flux error range. With the conventional HTB based DTC, at low and zero speed, the regulation of flux will not be good. To overcome this drawback, a small alteration in the structure is done, i.e., DTHB, thus retaining the simplicity of DTC algorithm. The performance is verified by varying the speed at low values. At low speeds of IM, the flux regulation and the speed is improved with adaptive PI controller based DHTB-II compared to DTC with DHTB-I and DHTB-II.

scholarly journals Hybrid DTC strategy based on predictive control with optimization of the PI controller parameters for TPIM drives

2021 ◽  
Vol 34 (02) ◽  
pp. 698-709
Author(s):  
Mehdi Ahmadi Taleshian ◽  
Mahmood Ghanbari ◽  
Seyed Mehdi Rakhtala
Keyword(s):  
Vector Control ◽  
Predictive Control ◽  
Control Method ◽  
Direct Torque Control ◽  
Induction Machine ◽  
Pi Controller ◽  
Torque Control ◽  
Control Technique ◽  
Three Phase ◽  
Optimal Values

In this paper, a novel hybrid Direct Torque Control (DTC) strategy based on predictive control with optimization of the Proportional-Integral (PI) controller to improve overall performances of Three-Phase Induction Machine (TPIM) drives is proposed. The presented control technique has contained merits of the DTC method such as fast dynamic response, simple structure, less dependence to machine parameters and merits of vector control method such as high accuracy. Furthermore, a hybrid DTC method with optimal voltage vectors is presented.  In the proposed control system, Genetic Algorithm (GA) is employed to obtain optimal values of the PI controller parameters. Finally, simulation results under the presented control strategy showed good performances of this method in comparison with DTC and vector control techniques.

scholarly journals Sensorless Direct Torque Control of the Six-Phase Induction Motor by Fast Reduced Order Extended Kalman Filter

Complexity ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-10
Author(s):  
Asghar Taheri ◽  
Hai-Peng Ren ◽  
Chun-Huan Song
Keyword(s):  
Kalman Filter ◽  
Induction Motor ◽  
Extended Kalman Filter ◽  
Direct Torque Control ◽  
Induction Machine ◽  
Torque Control ◽  
Motor Speed ◽  
Low Speed ◽  
Simplified Algorithm ◽  
Stator Resistance

In this paper, a simple extended Kalman Filter (EKF) controller for direct torque control (DTC) of a six-phase induction machine in all speed ranges is proposed. The aim of this paper is to decrease the execution time of EKF modeling of a six-phase induction motor. The proposed method is fast and can operate online. If the machine parameters are changed during the operation, the EKF algorithm is activated to find parameters used for controlling the motor. In low speed, not only the motor speed measurement but also the DTC of machine is difficult. The EKF model can estimate speed, flux, load torque, and stator resistance in low speed; thus, optimization can be performed in all loads and speed range. The proposed method increases the accuracy of DTC of the six-phase induction machine and decreases the computation cost of the system using the simplified algorithm. The simulation and experimental results verify the effectiveness and the robustness of the proposed method against parameter variations.

scholarly journals Real time implementation of anti-windup PI controller for speed control of induction machine based on DTC strategy

2021 ◽  
Vol 12 (3) ◽  
pp. 1358
Author(s):  
Lahcen Ouboubker ◽  
Jawad Lamterkati ◽  
Mohamed Khafallah ◽  
Aziz El Afia
Keyword(s):  
Direct Torque Control ◽  
Induction Machine ◽  
Speed Control ◽  
Pi Controller ◽  
Torque Control ◽  
Experimental Results ◽  
Practical Implementation ◽  
Dspace 1104 ◽  
Machine Simulation ◽  
Machine Speed

This paper presents simulation and experimental results of anti-windup PI controller to improve induction machine speed control based on direct torque control (DTC) strategy. Problems like rollover can arise in conventional PI controller due to saturation effect. In order to avoid such problems anti-windup PI controller is presented. This controller is simple for implementation in practice. The proposed anti-windup PI controller demonstrates better dynamic step changes response in speed in terms of overshoots. All simulation work was done using Simulink in the MATLAB software. The experimental results were obtained by practical implementation on a dSPACE 1104 board for a 1.5 KW induction machine. Simulation and experimental results have proven a good performance and verified the validity of the presented control strategy.

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