In this report, we have implemented a dc motor speed control system. The electric circuit of the armature and the freebody diagram of the rotor are shown in the following figure. Dc motor speed control system the speed control of a motor is frequently required in industrial applications, robotics, home appliances, etc. For creating and simulating the mathematical model matlab program with simulink extension was used.
Dec 16, 2017 pid control used for dc motor speed control with feedback system. For this purpose, a 5horse power hp dc motor of 240 v rating 1,220 rmin is used in the simulation models. A simple dc motor use electricity and magnetic field for producing torque which rotate the motor. Pmdc motor will be interfaced with matlab using an arduino and l298n. Firstly, mathematical model of dc motor was created. This model shows how to use the controlled pwm voltage and hbridge blocks to control a motor. Pmdc permanent magnet dc motor outperforms to ac motor because it provide better speed control on high torque loads and use in wide industrial application.
Scope shows motor speed, armature current and load torque and currents shows currents flowing in bjt q3 and diode d3. In this example, you model a dc motor driven by a constant input signal that approximates a pulse. Pdf speed control of dc motor using fuzzy logic technique. The speed control of the dc motor is performed using pid and flc in matlab environment. Concepts of dc motor for there are two types of motor. Examples blocks and other reference release notes pdf documentation. The model contains a dc motor subsystem with two electrical and two. Choose a web site to get translated content where available and see local events and offers.
One of the most used actuators in control systems is a direct current dc motor. The latter source is produced by a phasecontrolled thyristor converter for the dc1 to dc4 models and by a. Control speed with a pid controller computer system. A speed regulator is used to control the dc bus voltage.
The inverter is a mosfet bridge of the specialized power systems library. The structure of the control system has the form shown in the figure below. Fuzzy logic based speed control of dc motor is designed. The purpose of this project is to control the speed of dc motor by using fuzzy logic controller with matlab applications. Two degreeoffreedom pid control for setpoint tracking.
Hi, i want to control the speed of a dc motor using a gui and arduino, i have already made the conection between matlab and arduino for 2 leds, but i dont know how to do for controlling the speed. Asynchronous machines fed by pulse width modulation pwm voltage sourced converters vsc are nowadays gradually replacing the dc motors and thyristor bridges. The dc shunt motor is 120vdc with rated speed of 1800 revolutions per minute. Guisimulink based interactive interface for a dc motor with. Modeling and simulation of the dc motor using matlab and labview. The circuit diagram of dc motor speed control based pid controller is shown in figure 4. We shall use the same dc motor for which the parameters were calculated in the. Speed control of dc motor using matlab linkedin slideshare. Dc motor speed control in matlab the engineering projects. But my teacher shows that the model is contrling the speed and the current simutaneously. Control tutorials for matlab and simulink motor speed.
This example shows how to regulate the speed of an electric motor using two. Here, in this tutorial i will explain about how can make a program for dc motor speed control in matlab by creating a gui having different buttons on it to control the direction of rotation of the dc motor as well as the speed of the dc motor by sending different commands through the serial port. Pdf speed control of dc motor based on matlab interfaced. The idea of a speed control system is to maintain the speed of the motor at the desired value under various condition. The current band is defined and relay ensures that that the current remains between the upper and lower limit i. The feedforward gain kff should be set to the reciprocal of the dc gain from va to w. It directly provides rotary motion and, coupled with wheels or drums and cables, can provide translational. The motor starts in the positive direction with a duty cycle of 75% mean dc voltage of 180v. Dc motor speed control methods using matlab simulink and.
For controller design two methods are used, namely frequency shaping method and pwm control. Feb 22, 2012 my homework is to analysis the function of chopper fed dc motor drives every part. This paper describes a matlab simulink realization of the direct current dc motor speed control method by controlling the voltage applied to the field circuit of a separately excited dc motor in. Predictive speed control for dc machine file exchange matlab. Modelling and simulation of armaturecontrolled direct. I am not using any extra circuitry to control speed of motor. This example shows two dc motor control techniques for reducing the sensitivity of w to load variations changes in the torque opposed by the motor load. This paper discusses the speed and torque control of a shunt dc motor through matlab simulink simulations. The following matlab project contains the source code and matlab examples used for speed control of a dc motor. Feb 22, 2012 this model simulates the speed and current control of dc motor using the hysteresis pulse width modulation. Mar 16, 2017 the dc motor parameters are estimated by maltab parameter estimation toolbox.
Two different approaches can be adopted for testing control strategies using a dsp board and matlab real time workshop rtw9 dspace, 2008. This module uses simulink model to represent the dc motor model. Experiment 5 dc motor speed control walter scott, jr. Initially a simplified open loop model for dc motor is studied and then closed loop model is considered and required of current controller is studied. A common actuator in control systems is the dc motor. The speed response of dc motor is drawn for a bove circuit see fig.
Dc motor arduino matlab matlab answers matlab central. Checking the stability of the openloop transfer fun ction in matlab using the. Simulate variable speed motor control variable speed control of ac electrical machines makes use of forcedcommutated electronic switches such as igbts, mosfets, and gtos. Both approaches are simulated and compared to each other. Dc motor speed control using pid controller implementation. Abstract this paper presents an interactive module for understanding the effect of pi proportional integral controllers in the regulation of dc motor systems. For this example, we will assume that the input of the system is. The source code and files included in this project are listed in the project files section, please make sure whether the listed source code meet your. A linear model of the system can be extracted from the simulink model into the matlab workspace. The results show that the flc approach has minimum overshoot, minimum transient and steady state error, which show more. The goal of this assignment was to develop a speed control system for a dc motor. In addition the result obtained shows that at different.
Speed control of dc motor file exchange matlab central. It directly provides rotary motion and, coupled with wheels or drums and cables, can provide translational motion. The torque speed curves for the speed control methods are determined using the simulink models presented in the previous section. Animation is based on simulation results from the simscape electrical model. Mar 05, 2017 by using pid controller modeled by matlab that based on arduino uno for sending of controller signal with pwm form of 255 sample and resiving a sensing signal from lm393 that gives plases each. The general output variable of this actuator can be angular speed or angular. The purpose of this experiment is to design and implement a closeloop speed control of a dc motor drive.
Design a speed controller for a dc motor using pulsewidth modulation pwm. It also adds a few of the blocks commonly used in simscape. From the main problem, the dynamic equations in the laplace domain and the openloop transfer function of the dc motor are the following. Speed controlof dc motor using hysterisis pwm dc motor drive. Nov 10, 20 this video shows how to control dc motors by passing serial commands to a microcontroller from matlab.
Chopper fed dc motor drive speed control of dc motor. The inverter gates signals are produced by decoding the hall effect signals of the motor. Speed control of a dc motor using bjt hbridge matlab. In armaturecontrolled dc motors, the applied voltage va controls the angular velocity w of the shaft. The dc motor whose speed is to be controlled using the pid controller in the fig. Simulink modeling page we generated two different dc motor models in simulink. Developing speed control for a permanent magnet dc motor using. Nov 19, 2015 by using this technique, the pulse width hence then voltage across armature is changed and speed varies. The microb end of the cable needs to be connected to the programming ort on the due, and the usb end to the pc on which you have matlab installed. Future scope matlab simulation for speed control of dc motor has been done which can be implemented in hardware to observe actual feasibility of the approach applied in this thesis. Fuzzy controller based speed control of dc motor file.
Pid controller for dc motor speed control modeled in matlab. The paper deals with design of control for dc motor and analysis with focus on speed control. Simulink model with two degreeoffreedom pid control of a dc motor. In this paper, the dc motor speed controller with an embedded system is designed and the speed of dc motor is controlled using a fuzzy logic control flc technique. Dc motor speed and direction control using matlab gui and. A threephase motor rated 1 kw, 500 vdc, 3000 rpm is fed by a six step voltage inverter.
The performance analysis of the modeled system shows that usage of feedback enhances the performance of the transient response of the armature controlled dc motor. Dec 31, 2014 i want to control speed of dc motor using arduino via matlab. We will now employ these models within simulink to simulate the system response and design different approaches to control. Using matlab and arduino for motor control video matlab.
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