Three phase soft starter controller scheme for asynchronous machine response to transients using MatLab/Simulink

2017 ◽  
Author(s):  
C. O. Nwachukwu ◽  
M. I. Ajumuka ◽  
F. I. Izuegbunam
Keyword(s):  
Matlab Simulink ◽  
Asynchronous Machine ◽  
Soft Starter ◽  
Three Phase

scholarly journals Simulation Model of an Asynchronous Machine with Wound Rotor in Matlab Simulink

2021 ◽  
Vol 288 ◽  
pp. 01110
Author(s):  
Igor Doroshchenko ◽  
Vladimir Zakharenko ◽  
Mikhail Pohulayev ◽  
Nailya Miftakhova
Keyword(s):  
Simulation Model ◽  
Asynchronous Motor ◽  
Experimental Studies ◽  
Matlab Simulink ◽  
Asynchronous Machine ◽  
Modeling And Analysis ◽  
Proposed Model ◽  
Three Phase ◽  
Dynamic Operating ◽  
Derivatives Of

The article presents a three-phase mathematical model of asynchronous machine with wound rotor based on differential equations. The equations are resolved with respect to the derivatives of flux linkages. The description of the computer program in the Matlab Simulink that implements the model and allows to simulate transients of the asynchronous motor is present. A simulation model of a three-phase asynchronous machine with wound rotor, which allows to investigate static and dynamic operating ranges when power converters are connected to the rotor circuit has been obtained. The results of approbation of the obtained simulation model in the Matlab Simulink environment and experimental research of asynchronous engine with wound rotor, driving into the asynchronous-valve cascade, are presented. The results of experimental studies of the asynchronous machine under sinusoidal voltage using a stand based on the asynchronous-valve cascade, and comparison of the oscillograms obtained with simulation results of the proposed model are presented. The comparison of experimental and calculated oscillograms of the current of the investigated asynchronous motor can be concluded on satisfactory accuracy of the proposed model and the possibility of its application for modeling and analysis of asynchronous electric drives.

A Novel Two-phase Soft Starter Used for Three-phase Asynchronous Motors

2020 ◽  
Vol 13 (8) ◽  
pp. 1175-1182
Author(s):  
Jingwen Chen ◽  
Hongshe Dang
Keyword(s):  
Pulse Generation ◽  
Power Module ◽  
Two Phase ◽  
Power Semiconductor ◽  
Starting Current ◽  
Semiconductor Switches ◽  
Soft Starter ◽  
Three Phase ◽  
And Control ◽  
Driving Circuit

Background: Traditional thyristor-based three-phase soft starters of induction motor often suffer from high starting current and heavy harmonics. Moreover, both the trigger pulse generation and driving circuit design are usually complicated. Methods: To address these issues, we propose a novel soft starter structure using fully controlled IGBTs in this paper. Compared to approaches of traditional design, this structure only uses twophase as the input, and each phase is controlled by a power module that is composed of one IGBT and four diodes. Results: Consequently, both driving circuit and control design are greatly simplified due to the requirement of fewer controlled power semiconductor switches, which leads to the reduction of the total cost. Conclusion: Both Matlab/Simulink simulation results and experimental results on a prototype demonstrate that the proposed soft starter can achieve better performances than traditional thyristorbased soft starters for Starting Current (RMS) and harmonics.

scholarly journals ASYMMETRICAL SIX-PHASE SPACE VECTOR PWM SCHEME / ASIMETRINIS ERDVINIO VEKTORIAUS MODULIAVIMO METODAS ŠEŠIŲ FAZIŲ ĮTAMPAI FORMUOTI

2014 ◽  
Vol 6 (2) ◽  
pp. 168-171 ◽  
Author(s):  
Tadas Lipinskis
Keyword(s):  
Modulation Scheme ◽  
Motor Speed ◽  
Space Vector ◽  
Matlab Simulink ◽  
Stator Windings ◽  
Simulink Simulation ◽  
Three Phase ◽  
Electricity Grids ◽  
Torque Pulsations ◽  
Vector Modulation

Multiphase electric motors have smaller torque pulsations and are more reliable that their three-phase alternatives. However, standard electricity grids around the world are three-phase, so power inverter is needed to drive multiphase motors. Inverter is used not only to power the motor, but also to control the am­plitude and frequency of the produced voltage, thus controlling motor speed and torque. Multiphase systems with odd number of phases have been widely investigated; therefore, this paper focuses on a six-phase inverter with a single neutral symmetrical load. A novel asymmetrical space vector modulation scheme is proposed and evaluated using simulations in Matlab/Simulink. Simulation results are compared to other modulation schemes. The proposed method is suitable for generating near-sinusoidal output voltages; however, it might not be suited for driving motors with sinusoidally distributed stator windings. Daugiafaziai elektros varikliai turi mažesnes sukimo momento pulsacijas ir didesnį patikimumą, lyginant su trifaziais varikliais. Pasaulyje paplitę trijų fazių elektros tinklai, todėl daugiafaziams varikliams maitinti reikalingi dažnio keitikliai, keičiantys standartinę vienfazę arba trifazę tinklo įtampą į daugiafazę. Dažnio keitiklis keičia ir išėjimo įtampos amplitudę, ir dažnį. Tai sudaro galimybių tiksliai valdyti variklio greitį. Literatūroje plačiai išnagrinėti daugiafazės įtampos formavimo metodai, esant nelyginiam fazių skaičiui. Darbe siūlomas naujas erdvinių vektorių asimetrinis įtampos formavimo algoritmas šešių fazių dažnio keitikliui, apkrautam simetrine apkrova su viena neutrale. Algoritmas tiriamas Matlab / Simulink programa, rezultatai palyginami su gautais, taikant kitus šešiafazės įtampos formavimo metodus.

Performance Evaluation of 3Φ Asymmetrical MLI with Reduced Switch Count

2016 ◽  
Vol 3 (3) ◽  
pp. 671
Author(s):  
Chinnapettai Ramalingam Balamurugan ◽  
S.P. Natarajan ◽  
T.S. Anandhi
Keyword(s):  
Performance Evaluation ◽  
High Power ◽  
Output Voltage ◽  
Multilevel Inverter ◽  
Matlab Simulink ◽  
Ac Drives ◽  
Three Phase ◽  
Multi Level ◽  
The Cost ◽  
Switching Strategies

The multi level inverter system is habitually exploited in AC drives, when both reduced harmonic contents and high power are required. In this paper, a new topology for three phase asymmetrical multilevel inverter employing reduced number of switches is introduced. With less number of switches, the cost, space and weight of the circuit are automatically reduced. This paper discusses the new topology, the switching strategies and the operational principles of the chosen inverter. Simulation is carried out using MATLAB-SIMULINK. Various conventional PWM techniques that are appropriate to the chosen circuit such as PDPWM, PODPWM, APODPWM, VFPWM and COPWM are employed in this work. COPWM technique affords the less THD value and also affords a higher fundamental RMS output voltage.

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