The following matlab project contains the source code and matlab examples used for speed control of a dc motor. Dc motor speed control using matlabsimulink youtube. In this report, we have implemented a dc motor speed control system. Various control methods were to be employed, both open loop and closed loop. We used the commands c, a and s for the clockwise rotation, anti clockwise rotation and stopping the motor respectively. It uses a variable that controls the speed and is increased or decreased if it is not running at a preselected speed. Dc motor with speed and current closed loops, driven by etpu on mcf523x, rev.
Design and implementation speed control system of dc motor based on pid control and matlab simulink. We will now employ these models within simulink to simulate the system response and design different approaches to control. Residential and commercial appliances such as refrigerators and air conditioning systems use conventional motor drive technology. Control the induction motor line current by adjusting the dynamometer field. The ampl itude of the appl ied voltage is adjusted using the pwm technique. We first develop the differential equations and the laplace domain transfer. You must minimize the speed variations induced by such disturbances. The lab also provides tutorial of polynomials, script writing and programming aspect of matlab from.
Dc motor speed control system the speed control of a motor is frequently required in industrial applications, robotics, home appliances, etc. Pid controller is used to control a simple dc motor modeled in simulink. The pid controller design and choosing pid parameters according to system response are proposed in this paper. They are known to have precise angular position and have a quick response. It will be described how to program arduino with simulink coder and in the end we. Matlab is an interactive program for numerical computation and data visualization.
Efficiency and reliability are the key features for the development of advanced motor drives. Brushless dc motor is chosen in this project because of brushless dc. The goal of this assignment was to develop a speed control system for a dc motor. Control tutorials for matlab and simulink motor speed. We shall use the same dc motor for which the parameters were calculated in the. To compare and analyze the result between the simulation result using a dc motor mathematical model in matlabsimulink and the experimental result using the actual motor.
Dc motor speed control methods using matlab simulink. The idea of a speed control system is to maintain the speed of the motor at the desired value under various condition. Connect the output of the function block to the torque input port, tm, of the machine block. To show using matlab as a simulating aid that pidcontrollers which use continuous. The dc motor uses the preset model 5 hp 24v 1750 rpm. Connect the motor to the hbridge as shown in figures 18 20. In the previous tutorials, dc motor direction control using arduino and dc motor direction control using matlab we have learnt that how to control the direction of the dc motor. This paper will focus on the modeling and position control of a dc motor with permanent magnets. July, 2018 3 of 11 the rotor receives its excitation by induction from the armature field.
You can also visit the web page with resources for designing and tuning pid controllers. The dc motor angular speed control is achieved by two methods. Pdf speed control of bldc motor using pwm technique s. Doubleclick the function block, and enter the expression for torque as a function of speed. Write a transfer function for a dc motor that relates input voltage to shaft position. For this example, we will assume that the input of the system is. Threephase induction 208v motor with matlab revised. 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. Simulink modeling page we generated two different dc motor models in simulink. Pi controller for dc motor speed realized with arduino and. Pi controller for dc motor speed realized with arduino and simulink. Chopper fed dc motor drive speed control of dc motor.
Pdf modeling and simulation of the dc motor using matlab. Speed control of a dc motor using bjt hbridge matlab. A linear model of the system can be extracted from the simulink model into the matlab workspace. The dc motor parameters are estimated by maltab parameter estimation toolbox. The general output variable of this actuator can be angular speed.
Generally, a dc motor consists of either an electromagnet or a permanent magnet and a wounded coil known as the armature. The dc motor control experimental setup offers rich possibilities for learning the practical aspects of control systems design and implementation. To control the speed of dc motor with pid controller using matlabsimulink application. One of the most used actuators in control systems is a direct current dc motor. Speed and position control of a dc motor using fractional. The term project develops a speed control system for a direct current dc motor. Pd controllers are designed for the speed control, respectively, position control of a dc motor. Figure 18 shows the schematic, figure 19 shows the breadboard view for an uno, and figure 20 shows the breadboard view for a nano. For this purpose, a 5horse power hp dc motor of 240 v rating 1,220 rmin is used in the simulation models.
There are two ways of speed control for a dc motor, field control in this method, the eld current or current through stator is varied to control the speed of. Experiment 5 dc motor speed control walter scott, jr. Constant flux simulation model if the excitation flux is constant, insert the notation. In armaturecontrolled dc motors, the applied voltage va controls the angular velocity.
It directly provides rotary motion and, coupled with wheels or drums and cables, can provide translational motion. Dc motors that use feedback control are called dc servomotors. Dc motor speed control in matlab the engineering projects. Hello, this is a step by step tutorial to know how to control a dc motor using the l298n driver dual hbridge, and showing how to control directions and speed too. My homework is to analysis the function of chopper fed dc motor drives every part. Speed control of dc motor using matlab linkedin slideshare. It simulates a fan type load where load torque is proportional to square of speed. For example, the control of a rotary inverted pendulum requires a dc motor to drive the arm and the pendulum as shown in figure 21. Hence, the induction machine is a doubly excited machine in the same sense as the synchronous and dc machines. The armature mean voltage can be varied from 0 to 240 v when the duty cycle specified in the pulse generator block is varied from 0 to 100%. The torquespeed curves for the speed control methods are determined using the simulink models presented in the previous section. The purpose of this experiment is to design and implement a closeloop speed control of a dc motor drive.
We shall use the same dcmotor for which the parameters were calculated in the. The basic principle of operation is described by faradays law. Direct current is applied to the armature by means of a carbon brush or by means of electromagnetic induction. This paper describes the speed control of a dc shunt motor using conventional controllers pid, imc and fuzzy logic controller based on matlab simulation program. 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. Dc motor with speed and current closed loops, driven by. Actual speed of motor is compared with reference speed to control three phase inverter to adjust the terminal voltage. Quanser has a dc motor control kit with a user manual that lists at least 67 experiments1. All control methodologies are implemented using matlab gui. A mathematical model of the process has been developed using real plant data and then conventional controllers and fuzzy logic controller has been designed.
Et 438a automatic control systems technology 1 learning objectives 2 x after this presentation you will be able to. The pmdc consists of rotor or armature and a stator, which is a permanent magnet. For controller design two methods are used, namely frequency shaping method and pwm control. A common actuator in control systems is the dc motor. The paper deals with design of control for dc motor and analysis with focus on speed control. Speed control of dc motor the term speed control stand for intentional speed variation carried out manually or automatically dc motors are most suitable for wide range speed control and are there for many adjustable speed drives. Based on your location, we recommend that you select. 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.
To do this implementation, some hardware is required to measure the speed of the motor. Choose a web site to get translated content where available and see local events and offers. Schematic diagram of an arduino connected to a motor driver to control a dc motor. Add an interpreted matlab function block from the simulink userdefined functions library. Abstract in this paper we describe a technical system for dc motor. This section presents simulation results for the speed control methods and dc motor feedback control system. This lab provides an introduction to matlab in the first part. Speed control of a dc motor using controllers science. The duty cycle is defined as the percentage of digital high to digital low plus digital high pulsewidth during a pwm period. The purpose of this experiment is to design and implement a closeloop speed control of a dcmotor drive.
Firstly, mathematical model of dc motor was created. To see how to tune the pid controller, please see the video demo andor read the blog post. To train the students to use engineering tool, matlab, to create and extend its functions as necessary. There are two types of dc motor which is brushed and brushless dc motor.
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. Dc motor is designed to run on a dc electric power which is used electrical energy and produce mechanical energy. The feedforward gain kff should be set to the reciprocal of the dc gain from va to w. Execution time and survey ability is better in labview so we use labview for dc motor speed control. Write the transfer function for an armature controlled dc motor. The first part is concern on the simulation using matlab simulink where the dc motor is modeled and pi controller is tuned using zieglernichols rules and software tuning.
Add a dc voltage source block from the simscape electrical specialized power systems. To design the pid controller and tune it using matlabsimulink. Pdf design and implementation speed control system of dc motor. The electric circuit of the armature and the freebody diagram of the rotor are shown in the following figure. Pulsewidth modulation pwm or dutycycle variation methods are commonly used in speed control of dc motors. The system for the speedcontrol of a dc motor is shown in fig 1.
This paper contains introduction to using an arduino board and simulink pi controller in closed loop system. The model presents speed control of brushless dc motor. Modeling of dc motor the most common device used as an actuator in mechanical control is the dc motor. Speed control of a dc motor file exchange matlab central.
For creating and simulating the mathematical model matlab program with simulink extension was used. The system structure of a dc motor is depicted in figure22, including the. In this paper we consider speed control by constant flux. Modeling and simulation of the dc motor using matlab and. Speed control of dc motor using pulsewidth modulation. In this chapter, speed control of a dc motor using pulse width modulation pwm technique is described.
Speed control of a dc motor using pwm video matlab. Dc motor speed control using arduino the engineering. The speed of dc motor is controlled using arduino programming platform and matlabs simulink coder. This model of bldc motor can be used in sensorless control of bldc motor as well. Represent a mechanical load using a mathematical model. Design a speed controller for a dc motor using pulsewidth modulation pwm. Purushotam kumar, research scholar, department of electrical engineering, asansol engineering collegewb. But my teacher shows that the model is contrling the speed and the current simutaneously. Modeling and simulation of the dc motor using matlab and labview.
There is complete dynamic model of brushless dc motor. The requirement of feeding back phasecurrent and speed of the motor will be studied in experiment4. Using matlab for control systems cise 302 lab manual page 4 cise 302 linear control systems lab experiment 1. To accomplish these goals, closed control loop must contain a. Here pid controller is employed to control dc motor speed and matlab program is used.