Design and Simulation of a Three-Phase Induction Motor Speed Control System (original) (raw)
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“Various Speed Control Techniques of Three Phase Induction Motor’’
2018
This paper presents Space Vector Modulation of Inverter fed with three phase Induction Motor using MatLab Simulation. Induction motors are the most widely used electrical motors due to their reliability, low cost and robustness. However, induction motors do not inherently have the capability of variable speed operation. Due to this reason, earlier dc motors were applied in most of the electrical drives. But the recent developments in speed control methods of the induction motor have led to their large scale use in almost all electrical drives. Voltage control is required to meet the variation in the input voltage and to regulate the output of the inverter and it is an algorithm for the control of Pulse Width Modulation technique. SVM gives better harmonic response and higher efficiency compared to pulse width modulation techniques. KeywordsSVM Technique, PI Control, Speed control method, VSI bridge inverter, MatLab.
DESIGN AND MODELING OF A PROPORTIONAL DERIVATIVE CONTROLLER FOR A THREE-PHASE INDUCTION MOTOR SPEED
Nigerian Journal of Technology (NIJOTECH), 2024
Many applications require variable speed operation. The motor speed needs to be controlled to save more power. It became highly imperative for further research to find out an efficient method that can yield an optimal speed control. This study presents the design and modeling of a proportional derivative controller for a three-phase induction motor speed control. The scalar control methodology was used to investigate the performance of motor speed control. For the controller approach, proportional-integral (PI) and proportionalderivative (PD) controllers were investigated. Simulation results using MATLAB (Simulink) software is presented. Furthermore, investigation of the PI, and PD performance shows that the PI controller performed poorly due to existence of high peaks, overshoots and rise time. However, the PD controller yielded satisfactory results. Hence, PD controller revealed a better performance with a 1.01s settling time and a steady state error of 1.0 as against that of the PI controller which was unstable, an overshoot of approximately 96% and a steady state error of 1.22.
real time speed control of the three phase induction motor
— This paper is concerned with real time speed control of three phase induction motor and implementation of voltage/frequency (V/F) speed control method with the help of variable frequency drive (VFD), Firefly algorithm, and also this paper presents the V/f control of induction motor using sine wave PWM method. Because of its simplicity, the V/F control also called as the scalar control, is the most widely used speed control method in the industrial applications.The proposed technique gives better performance for three phase induction motor than the conventional technique. The main advantage of the proposed system is quick settling time, intelligent technique.The speed control is obtained by firefly control, because PI has difficulty in dealing with dynamic speed. The proposed control is done by using MATLAB/SIMULINK and also implemented in hardware.
Speed Control of Three-Phase Induction Motor Drive
International Conference on Aerospace Sciences and Aviation Technology, 1991
One of the widely used drives in the industry is current source inverter-fed three-phase induction motor drive system. In this paper a complete design of such system, included a 0.5 HP three phase induction motor, is given. It was strongly required, that the design and implementation of the control and logic circuits must be cheap and simple as possible without loosing the stability of the system. A suitable dynamics was also recognized. The experimental results are given in support of the design procedure used to built the experimental model.
Induction Machine Speed Control: A survey
The asynchronous machine is one of the most widely used electrical machines as industrial drive system. The induction motors have numerous commercial and industrial applications. This paper presents a survey of induction machine control based on current discoveries, comparing the different techniques.The advances in semiconductor and power electronics has made some machines drives obsolete. The adaptive and intelligent control schemes have in recent years taken over from conventional control methods.The control of induction machine (speed and torque) is very important inmost industrial operations. However, the review of different method of speed and torque control with relativemodelswill be investigated. The sample motor is a three phase, 50Hz, 2.2kW machine, the control design is with reference to speed and torque control loop and current regulation that can overcome the limitation of sluggish response of volts per hertz controlled method. A constant volt/hertz (V/f) mode of operation is chosen for its advantages and popularity in motor speed control. The control design can be of proportional plus integral (PI) controller,and Fuzzy logic controller with regard to vector control. However, the Fuzzy Logic controller (FLC)is used to compare the PI controller in this work. Matlab/Simulink model is designed and simulated for the control. The simulated results show that Fuzzy logic based controller produced a better control performance when compare with PI controller in term of speed and torque control.
Strategies of Speed Control of Induction Motor Drive
—The synthesis of the standard proportional integral regulator types is characterized by its sensitivity during parametric variations of controlled system controlled. So, to remedy this problem the adjustment techniques are developed. In this order, the work presented in this paper proposes the use of a fuzzy regulator for controlled the speed of a three-phase induction_machine. For this purpose, the model of the induction machine is presented as well as the structure of the fuzzy control adopted. Then, thanks to the numerical simulation under MatLab the performances during the variation of the rotor resistance are analyzed compared to the result with a PI controller.
International Journal of Recent Technology and Engineering (IJRTE), 2019
This paper presents the PWM (Pulse Width Modulation) based speed control of three-phase asynchronous (Induction) motor. Induction motor is the leading machine used in many industrial controls, automation processes and in the field of HVAC applications. However, induction motor has fixed rated speed when directly connected to ac supply. It is necessary to design a drive system to obtain variable speed at its output to fulfill the application requirement. For this reason, we have designed a “VFD (Variable Frequency Drive)”, which gives desired speed- according to load changes unlike the DC motors, which do not require any speed controlling drive. Currently with the technological elevation in drive systems, the speed control of induction motor is more economical, convenient, reliable, and accurate. It provides continuous process control over a wide range of speed. VFD not only controls the speed of induction motor but also make its starting smooth by reducing starting inrush current an...
Speed Control of Induction Motor using PI and V/F Scalar Vector Controllers
In this paper, Induction Motors (IM) are widely used in the industrial application due to a high power/weight ratio, high reliability and low cost. A Space Vector PWM (SVPWM) is utilized for PWM controlling scheme. The performance of both the speed and torque is promoted by a modified PI controller and V/F scalar control. A scalar control is a simple method and it's operated to control the magnitude of the control quantities in constant speed application. V/F scalar control has been implemented and compared with the PI controller. The simulation results showed that Indirect Field oriented control (IFOC) induction motor drive employ decoupling of the stator current components which produces torque and flux. The complete mathematical model of the system is described and simulated in MATLAB/SIMULINK. The simulation results provides a smooth speed response and high performance under various dynamic operations.
— This paper presents a design of tuning mechanism of Proportional Integral Derivative Controller for application in three phase induction motor speed controls. It demonstrates, in detail, how to employ the MatLab tool so as to search efficiently for the optimal PID controller parameters within a mechanism system. The proposed approach has superior features, including: easy implementation; stable convergence characteristics; and less computational effort. Three phase induction motors has complex mathematical modelling which makes it difficult to design the speed controller. Software PID Tuning Mechanismwas developed herein and used to obtain both the initial PID parameters under normal operating conditions and the optimal parameters of PID control under fully-loaded conditions. The proposed PID controller Tuning Mechanism will automatically tune its parameters within these ranges. In order to prove the performance of the proposed tuning mechanism for the PID controller, a three phase asynchronous motor was modelled in MATLAB, the transfer function was obtained using the software and a controller was designed using PID. The modelling and simulations results show the potential of the proposed controller to be very efficient. Keywords— PID Controller, Modelling of Induction Motor, Design of PID Tuning Software.
2020
Induction machines are widely used in various applications including industrial applications and locomotive applications. The electric systems used in industrial applications are required to have higher performance and reliability requirement so three phase induction motors are preferable because they are simple to design, easy to maintain and are less costly. However, induction motors do not have capability of variable speed operation, it is in that reason, the speed control of induction motor has become essential. This report deals with the investigation, experimental tests and compares the main concept of speed control of induction motor using V/F control method and vector control method with the help of AC2 - Space Vector PWM VSI Induction 3HP Motor Drive Simulink model. Variable voltage and frequency (V/F control) method is the most suitable common method of speed control for the applications without position control requirements for high accuracy of speed control but V/F control is inferior to vector control for complex dynamic behavior of the induction motor so the vector control technique works with vector quantities, controlling the desired values by using space phasors which is a better solution so that the control on flux and torque become independent from each other and the induction motor is transformed from a non-linear to linear control plant. In this report many experiments were investigated though the build in Simulink model did not allow any changes of some parameters, so the two methods of speed control of induction machine were not clearly investigated but it compares the main concepts of the two methods of controlling speed of induction motor.