When current carrying conductor is placed in a magnetic field it experience a force. Speed control of dc motor is the most important feature we interest in, when we control the speed we vary it according to the requirements and the operation we need. Dc motor speed controller detailed circuit diagram available. This system is used where very sensitive speed control of motor is required e. The speed of the ac induction motor is adjusted by the frequency variation of the ac power to the motor. Examples of how a dc rectifier bridge operates are given on the next few pages. An inverter is nothing but a motor control which is used in adjusting the speed of an ac induction motor. Introduction although a far greater percentage of electric motors in service are a. For creating and simulating the mathematical model matlab program with simulink extension was used.
The ampl itude of the appl ied voltage is adjusted using the pwm technique. Dc compound motors are used in application where large starting torque are required but where the load may fall to such a small value that a series motor would reach a dangerously high speed. Dc motor, generators and energy conversion devices lecture notes. It directly provides rotary motion and, coupled with wheels or drums and cables, can provide translational motion. In fact, fine speed control is one of the reasons for the strong competitive position of d. 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. Worlds best powerpoint templates crystalgraphics offers more powerpoint templates than anyone else in the world, with over 4 million to choose from. Automation results into better quality, increased production an reduced costs. Speed below base speed is not possible in this method. Nov 26, 2015 in this video learn about speed control of dc motor, types of speed control of dc motor, armature type of speed control of dc motor, field type speed control of dc motor, dc motor speed control. Scribd is the worlds largest social reading and publishing site. Dc motor speed control in labview the engineering projects.
A dc machine is also easily adaptable for drives with a wide range of speed control and fast reversals. The purpose of a motor speed controller is to take a signal representing the required speed, and to drive a motor at that speed. This lab allowed us to further investigate the characteristics of the various dc motor speed control schemes. The relationship between speed, armature voltage, and flux is this says that increasing the flux reduces the speed, and vice versa. Winner of the standing ovation award for best powerpoint templates from presentations magazine. First of all i would like you to explain the algorithm of dc motor speed control in labview with the help of a flow chart. In the beginning of the code two integers are declared by name out1 and val, where out1 is equal to 9 which shown that pin d9 of arduino is used as output pin or pwm pin. Conclusion in this lab experiment the dc motor speed. Speed control of dc motor the speed of a dc motor is given by i flux control. Ppt dc motor drives powerpoint presentation free to. Speed control of separately excited dc motor by ppt 2.
The pmdc consists of rotor or armature and a stator, which is a permanent magnet. It can satisfy the demands of load recurring high starting, accelerating and retarding torques. Dc motor speed control using arduino the engineering. Speed control of dc motor by using pwm technique project report. Presentation on ieee topic, speed control of dc motor using triac. In an open loop control, the only components in the system. The electric equivalent circuit of the armature and the free body diagram of the rotor are shown in the following figure. Here is a simple dc motor speed controller circuit that can be configured to control the sweep rate of automobiles windscreen wiper. It can be used in different industrial applications.
What are the best ways to control the speed of dc motor. An induction motor is basically a constant speed motor, that means, for the entire loading range, change in speed of the motor is quite small. For this purpose encoder feedback is used to compare the target speed and actual speed and the difference between these two value error is used to drive the motor. Dec 11, 2016 the arrangement of this system is as shown in the figure at right. The block diagram of the closed loop system is shown in figure 4. Bldc motor speed control with rpm display and pwm this project is used to control the speed of brushless dc motor by using arduino development board with rpm display and pulse width modulation. Theyll give your presentations a professional, memorable appearance the kind of sophisticated look that todays audiences expect. So, lets get started with dc motor speed control using arduino uno. Pdf microcontroller based dc motor speed control using.
Unfollow dc motor speed control to stop getting updates on your ebay feed. Speed control of dc motor using microcontrollers authorstream. Pdf speed control of dc motor using pwm method ppt vinod. Ppt dc motor speed control powerpoint presentation, free. The arrangement of this system is as shown in the figure at right. Speed control of dc motor full guide for controlling the. Resistor r4 limits the base current of transistor t2. Speed control of dc motor using microcontrollers authorstream presentation. The circuit comprises a timer ne555 ic1, mediumpower driver transistor bd239 t1, highpower switching transistor bd249 t2 and a few other discrete components. Induction motor seminar ppt, pdf report study mafia. The circuit of a simple speed controller for a mini dc motor, such as that used in tape recorders and toys, is shown in fig. A common actuator in control systems is the dc motor. Speed control of dc motor by using pwm technique project.
Different speed control methods for different dc shunt and series methods are there. Flow chart for this project is shown in the figure below. It is outer cover of dc motor also called as frame. Motor operation, construction, circuit a free powerpoint ppt. Dc motor speed control free download as powerpoint presentation. Speed of a dc motor back emf e b of a dc motor is nothing but the induced emf in armature conductors due to rotation of the armature in magnetic field. Voltage values given in these examples are used for explanation only. K e b o where, kconstant this shows the speed of a dc motor is directly proportional to the back emf and inversely proportional to the flux per pole. 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. Brief history of dc motor the history of dc motor can be traced back to the 1830s,when michael faraday did extensive works on disc type of machine 4.
Electrical4u is dedicated to the teaching and sharing of all things related to electrical and electronics engineering. Speed control of dc motor read 5377 times previous topic next topic. Apr 10, 2017 in this tutorial, i have controlled its speed as well by providing different voltage levels at the enable pin of the dc motor control driver l298. Where the supply voltage may fluctuate, for instance on a traction system, the series winding reduces the fluctuation of armature. Speed control of dc motor the speed of a dc motor is given by i.
Dc motor with speed and current closed loops, driven by. In this activity we will design and implement a speed controller for a simple dc motor. Dc motor with speed and current closed loops, driven by etpu on mcf523x, rev. A thyristor bridge is a technique commonly used to control the speed of a dc motor by varying the dc voltage. Speed control methods of dc motor speed control of shunt motor 1. In particular, we will choose and tune the gains of a pi. In this presentation electronics and communication students can find in this presentation electronics and communication students can find. In this lab experiment, the dc motor speed control was studied. Both approaches are simulated and compared to each other. Ppt dc motor powerpoint presentation free to download. It is configured for automobile usage with negative terminal of the power supply connected to. The actual values for a given load, speed, and motor vary. Speed control of dc motor using artificial neural network.
Pulsewidth modulation, pi control, pole placement, steadystate error, disturbance rejection, saturation, integrator windup, embedded control. Lec 53 question discussion on speed control of dc motor duration. For this example, we will assume that the input of. Speed control methods for a dc series motor can be classified as. For controller design two methods are used, namely frequency shaping method and pwm control. Generally, it is known as the asynchronous motor because its running speed is less than its synchronous speed. Pid control methods are widely used in the industry.
Speed control of dc motor shunt, series, and compound february 24, 2012 july 11, 2019. Speed of a dc shunt motor can be varied very easily. M1 may be any ac motor or dc motor with constant speed. Firstly, mathematical model of dc motor was created. Chart and diagram slides for powerpoint beautifully designed chart and diagram s for powerpoint with visually stunning graphics and animation effects.
Block diagram of the closed loop system labeling all the signals e. Motor speed can be controlled by controlling armature voltage va armature current ia. Speed control of dc motor using pulse wi authorstream. Overview in this lesson, you will learn how to control both the direction and speed of a small dc motor using an arduino and the l293d motor driver chip. Microcontroller based dc motor speed control using pwm technique. Arduino dc motor control arduino pwm motor control dc motor speed control download program. Speed control of separately excited dc motor by ppt 2 free download as powerpoint presentation. Todays industries are increasingly demanding process automation in all sectors. A study on the dc motor speed control by using backemf voltage. Ppt dc motors powerpoint presentation free to view id.
Speed control of dc motor using pulsewidth modulation. Dc series motor used in hybrid electric vehicle is a versatile and flexible machine. Armature voltage is varied by pulse width modulation pwm of input dc voltage. The variable speed drives, which can control the speed of a. Dc motor speed control powerpoint ppt presentation. An induction motor can be defined as the ac electric motor device in which a power source fed by the alternating current with the help of a primary winding. Speed control methods of a dc motor can be varied by varying flux, armature resistance or applied voltage. The speed control of dc motor has been performed using pid and the narmal2 controllers and the results obtained have been compared among themselves 10. Ac incoming voltage is 230v 50hz is step downed to 15v ac using a step down transformer. Diode d2, connected in antiparallel with the dc motor, limits the back e. A presentation on speed control of dc motor using pwm method presented by, vinod karvande 121030048 avinash ambre 1030981. Control motor speed with a computer algorithm microcontroller 12 vdc motor ac tachometer amplifier 9 vdc power supply signal conditioning frequency. Speed control of shuntexcited motors a by changing field resistance b by changing armature voltage field control voltage control motor starting to limit the starting current, the motor must be started with a variable voltage. Speed control of dc motor speed control means intentional change of the drive speed to a value required foe performing the specific work process.
In this tutorial, i have controlled its speed as well by providing different voltage levels at the enable pin of the dc motor control driver l298. This application note discusses the basics of an ac. Dc motors are widely used in industry because of its low cost, less complex control structure and wide range of speed and torque. This paper reports a microcontroller based control system to change the speed and direction of rotation of dc motor. There are two types of controls which were made in order to control the speed as well as the current. A simple explanation of how to control the speed of a dc motor. Magnetic circuits quantities and definitions, solving magnetic circuits with electrical analogies, mechanics for motors and generators, electromagnetic induction and magnetic forces, construction of elementary dc generators, induced voltage in practical dc machines, power balance and.
Inverter not only adjusts the speed but also adjusts the voltage to the motor. In this project we will be using pid for speed control of a dc motor. Free download induction motor seminar ppt, pdf report. The maximum duty cycle can be 100%, which is equivalent to a dc waveform.
The paper deals with design of control for dc motor and analysis with focus on speed control. Dec 10, 2017 speed control methods of a dc motor can be varied by varying flux, armature resistance or applied voltage. Speed control of dc motor dc motor speed control youtube. Dc motor speed control using arduino the engineering projects. The output at pin 3 of ic1 is fed to transistor t1, which, in turn, drives the dc motor through high power switching transistor t2 at the selected speed. If the motor is running at its rated speed and the excitation current is. It will be helpful to vary the speed of the dc motor in either clockwise or in anti clockwise direction. Speed control of dc motorseriesshunt ppt video online download. Can someone tell me what is wrongwhat the correct schematic is. Free motor control books download ebooks online textbooks. In armaturecontrolled dc motors, the applied voltage va controls the angular velocity w of the shaft. I was looking at this tutorial for a pwm and it said to ask on the forums because the schematic was incorrect.
Speed control of dc motor by using pwm technique project ppt is covers out line about this project. You can sense the effect of speed control of dc motor in the movement of robotic vehicles, movement in elevators, movement in paper mils and so on when different types of dc motors. Our new crystalgraphics chart and diagram slides for powerpoint is a collection of over impressively designed datadriven chart and editable diagram s guaranteed to impress any audience. Predefined speed control of bldc motor powerpoint ppt presentation. Such a fine speed control is generally not possible with a. With the the increasing use of power semicondutor units, the speed control of dc motor is increasingly getting sophisticated and precise. Thus by varying the pulsewidth, we can vary the average voltage across a dc motor and hence its speed.
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