A direct torque control system without speed-sensor for asynchronous motor

2007 ◽  
Author(s):  
Lian Zhang ◽  
Chengbo Yu ◽  
Xiaoqian Hu
Keyword(s):  
Control System ◽  
Asynchronous Motor ◽  
Direct Torque Control ◽  
Torque Control ◽  
Speed Sensor

Study of the Electricity-Draw Control System in Electrical Engineering Based on Neural Network DTC

2013 ◽  
Vol 676 ◽  
pp. 209-212
Author(s):  
Lu Huan Shi ◽  
Yao Hui Li
Keyword(s):  
Neural Network ◽  
Control System ◽  
Control Strategy ◽  
Dynamic Performance ◽  
Asynchronous Motor ◽  
Sudden Change ◽  
Direct Torque Control ◽  
Torque Control ◽  
Electric Locomotive ◽  
Low Velocity

In the electricity draws control system, the change of Low-velocity area of Rs will bring about a series of problem, especially the stator current and flux, will cause the distortion of the speed pulse vibration. The test discussed control scheme and optimization designs of asynchronous draw motors from exchange transmission electric locomotive operation characteristic demand. It adopts control strategy of neural network direct torque control (DTC) to control electricity draw the locomotive, to analyze the reacting of starting and sudden change of load, verifying this method may effectively improve the dynamic performance of the asynchronous motor, got up the very good inhibitory action to the low speed area torque pulsation. Thus the simulation results have proven the neural network DTC control strategy feasibility.

The Design and Simulation of AC Asynchronous Motor Direct Torque Control System

2015 ◽  
Vol 713-715 ◽  
pp. 814-819
Author(s):  
Li Ping Zhang ◽  
Xu Guang Xin ◽  
Wei Ya Wang ◽  
Hai Feng Wu
Keyword(s):  
Control System ◽  
Dynamic Performance ◽  
Asynchronous Motor ◽  
Direct Torque Control ◽  
Torque Control ◽  
Analysis Method ◽  
Flux Linkage ◽  
Control Precision ◽  
Stator Flux ◽  
The Stability

The direct torque control (DTC) system of the traditional asynchronous motor has many disadvantages, such as complex modeling and large amount of calculation, In order to improve the dynamic performance of the DTC system of the asynchronous motor, a direct torque control system is put forward. It uses space vector analysis method to calculate electromagnetic torque and stator flux linkage of asynchronous motor directly, follows the change of the stator flux linkage and torque, omits the complicated calculation, reduces the dependence on motor parameters. The simulation model of the DTC system of the asynchronous motor was established using SIMULINK software package. The feasibility of method is proved in theory, The results of simulation show that the modeling and simulation of the system has good static and dynamic performance, control precision of the system is higher, the stability is better.

Induction Motor Direct Torque Control Method of Fuzzy Adaptive

2013 ◽  
Vol 387 ◽  
pp. 365-368
Author(s):  
Cong Fan ◽  
Guo Zhang ◽  
Yu Ping Liu
Keyword(s):  
Control System ◽  
Control Method ◽  
Asynchronous Motor ◽  
Direct Torque Control ◽  
Adaptive Method ◽  
Torque Control ◽  
The Self ◽  
Self Tuning ◽  
Simulation Results ◽  
Fuzzy Adaptive

This paper focus on the instability of asynchronous motor direct torque control system which caused by PID parameter changes. In order to improve the self-tuning capabilitiy of PID countroller, enhance the speed and stability of control system. fuzzy adaptive method was adapted to optimize PID parameter. Simulation results show that: this strategy improved the performance of direct torque control system significantly.

scholarly journals SIMULASI PENGATURAN KECEPATAN MOTOR INDUKSI 3 PHASA DENGAN DIRECT TORQUE CONTROL MENGGUNAKAN MATLAB

eLEKTRIKA ◽  
2018 ◽  
Vol 9 (1) ◽  
pp. 13
Author(s):  
Ulfatun Khasanah ◽  
Supari Supari ◽  
Sri Heranurweni
Keyword(s):  
Control System ◽  
Induction Motor ◽  
High Efficiency ◽  
Induction Motors ◽  
Direct Torque Control ◽  
Torque Control ◽  
Control Technique ◽  
Speed Sensor ◽  
Speed Regulation ◽  
Torque Estimation

Induction motors are widely used in the industrial world because they have many advantages, including construction that is very simple and strong, cheap, has high efficiency, quite good power factor, and maintenance is easier. Besides the advantages of induction motors also have weaknesses, one of the disadvantages of an induction motor is not being able to maintain its speed constantly if there is a change in load. If there is a change in load, the speed of the induction motor will decrease. One method of regulating the speed of an induction motor developed in addition to vector control is the Direct Torque Control (DTC) method. The DTC control technique allows direct and separate flux and torque settings and can be done without using a speed sensor. The estimated rotor rotation, torque and flux is carried out by the DTC which is inputted with stator voltage and current. To achieve the desired flux and torque estimation is used as feedback on the control system. In this final assignment, the speed regulation of the induction motor will be simulated using the DTC method using Matlab. The results obtained through the simulation show the length of time to reach the reference speed for speeds of 500rpm and 1000 rpm is around 0.5 seconds. Keywords : Induction motor, Direct Torque Control, Matlab.

Composite Grinding Machine Asynchronous Electric Spindle Direct Torque Closed-Loop Servo Control Research

2013 ◽  
Vol 650 ◽  
pp. 476-481
Author(s):  
Tian Lan ◽  
Qiu Shi Han ◽  
Bao Ying Peng ◽  
Shi Wei Hu
Keyword(s):  
Control System ◽  
Closed Loop ◽  
Position Control ◽  
Asynchronous Motor ◽  
Direct Torque Control ◽  
Torque Control ◽  
Servo Control ◽  
Current Loop ◽  
Basic Module ◽  
Grinding Machine

Composite grinding machine for non-circular shaft parts, on the workpiece servo spindle high requirements.In order to overcome the vector control coordinate calculation of complex, slow response speed and other defects, this paper adopts the direct torque control scheme of asynchronous motor spindle servo control research.Using the Matlab/Simulink module library provides the basic module, built asynchronous electric spindle direct torque control system model.Coordinate transformation process were established, flux adjust step, flux observation, link and loop PID position control module, and the use of subsystem package technology package.The current loop, speed loop, ring in position and torque simulation test, the results show that, the method of direct torque control of asynchronous motor spindle control drive control system can obtain good static and dynamic response characteristics and the closed-loop response performance.

scholarly journals Performance Improvement of Servo Control System Driven by Novel PMSM-DTC Based On Fixed Sector Division Criterion

Energies ◽  
2019 ◽  
Vol 12 (11) ◽  
pp. 2154 ◽  
Author(s):  
Dazhi Wang ◽  
Tianqing Yuan ◽  
Xingyu Wang ◽  
Xinghua Wang ◽  
Yongliang Ni
Keyword(s):  
Control System ◽  
Performance Improvement ◽  
Error Compensation ◽  
Permanent Magnet Synchronous Motor ◽  
Direct Torque Control ◽  
Torque Control ◽  
Servo Control ◽  
Flux Linkage ◽  
Servo Control System ◽  
Stator Flux

In order to improve the performance of the servo control system driven by a permanent magnet synchronous motor (PMSM) under novel direct torque control (NDTC), which, utilizing composite active vectors, fixed sector division criterion, is proposed in this paper. The precondition of the accurate compensations of torque and flux errors is that the sector where the stator flux linkage is located can be determined accurately. Consequently, the adaptive sector division criterion is adopted in NDTC. However, the computation burden is inevitably increased with the using of the adaptive part. On the other hand, the main errors can be compensated through SV-DTC (DTC-utilizing single active vector), while another active vector applied in NDTC can only supply the auxiliary error compensation. The relationships of the two active vectors’ characteristics in NDTC are analyzed in this paper based on the active factor. Furthermore, the fixed sector division criterion is proposed for NDTC (FS-NDTC), which can classify the complexity of the control system. Additionally, the switching table for the selections of the two active vectors is designed. The effectiveness of the proposed FS-NDTC is verified through the experimental results on a 100-W PMSM drive system.

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