Speed control of dc motor by pwm pdf

In pulse width modulation, we actually control the switching duty cycle, which is the ratio of ontime to the total time of switching. The working principle and program of this circuit is same as that of the led brightness control. In this tutorial we will see how to control the speed of a dc motor using pulse width modulation pwm. This video shows about how to control a dc motor speed with pulse width modulation keeping frequency constant and varying duty cycle using a free running mul. The motor voltage and revolutions per minutes rpm obtained at different duty cycle rates. But before we start looking at the ins and outs of pulse width modulation we need to understand a little more about how a dc motor works. Dc motor speed control system the speed control of a motor is frequently required in industrial applications, robotics, home appliances, etc. We use dc motors in many systems in our day to day life. In addition the dc motor speed control project can be improved by bringing into play power electrical gadgets like igbts to get speed control top capacity industrialized motors.

Now this circuit has mainly two functions, first is to drive a dc motor from low power control signals and the other is to change the direction of rotation of dc motor. The idea of a speed control system is to maintain the speed of the motor at the desired value under various condition. Pdf microcontroller based dc motor speed control using pwm. In industry dc motor is widely uses for speed control and load characteristics. In this project, we will control the speed of a dc motor using lpc2148 mcu and a potentiometer by implementing pwm technique. Why is pwm used to control dc motor speed instead of using a. For receiving pwm indications, motor drivers ic is connected to the microcontroller for distributing much wanted output for pace control of a small dc machine. In this report, we have implemented a dc motor speed control system. Pdf speed control of dc motor by using pwm technique project. Pwm speed control of dc motor based on singular perturbation technique.

Some of techniques used are rheostat and chopper control technique which are not that much effective. The purpose of this experiment is to design and implement a closeloop speed control of a dcmotor drive. Veermata jijabai technological institute 1 speed control of dc motor by using pwm. L293d ic is used to drive the motor which is made up of two hbridge. Only difference is that and additional motor driver circuit using a transistor is included in the circuit. Speed control of dc motor with simple anolog circuits using. In the present project, the pwm generation is done using timer ic. By using pwm we can easily control the average power. Apart from these techniques, pulse width modulation is the effective way to implement motor speed control. In this tutorial we will learn that how to make an algorithm for dc motor speed control using arduino uno. For example in robotics it is generally used to control the moving speed of a robot whatever it may be path finder, opportunity or any one industrial robot. The performance of singlephase dc drive system controlled by uniform pwm full bridge dc dc converter which gives fast response to control the dc motor 6. The speed control of brushless dc motor drive employing hard chopping pwm technique using dsp which helps in controlling the speed of dc motor 5.

Speed control for dc motor with pulse width modulation pwm. Arduino dc motor control tutorial l298n pwm hbridge. This paper uses the above principle to control the speed of the motor by varying the duty cycle of the pulse applied to it. Speed control of any motor is always done y pulse width modulation, abbreviated as pwm. Speed control of dc motor using pulse width modulation, 555. But when it comes to controlling the speed using microcontrollers. Aug 23, 2012 this video shows about how to control a dc motor speed with pulse width modulation keeping frequency constant and varying duty cycle using a free running mul. In this article i will show you how to create a ne555 timer ic based pwm dc motor speed controller. I will share the circuit diagram, component list, tips for making the circuit yourself and a fully working printable pcb layout. The duty cycle is defined as the percentage of digital high to digital low plus digital high pulsewidth during a pwm period. Circuit diagram of dc motor speed control using arduino is shown in the figure below. Is the only reason for choosing pwm to obtain a better precision or not consuming extra power. If a jumper is present on this pin, the motor will be enabled and work at maximum speed, and if we remove the jumper we can connect a pwm input to this pin and in.

Speed control of dc motor using pulsewidth modulation pwm. Dc motor speed control using arduino the engineering projects. Pdf microcontroller based dc motor speed control using. The variable speed drives, which can control the speed of a. The pwm duty cycle is used to vary the speed of the motor by controlling the motor terminal voltage. So by this we can conclude the pwm can be used to vary the motor speed. This paper reports a microcontroller based control system to change the speed and direction of rotation of dc motor. What are the best ways to control the speed of dc motor. There are many different ways to control the speed of dc motors but one very simple and easy way is to use pulse width modulation. My question is at the end to change the speed we are controlling the input voltage of a dc motor in both pwm pulse width modulation and variable resistance cases. Speed control of dc motor using pulse width modulation. Dc motor speed control using pwm with pic microcontroller. Speed control of dc motor using pwm a pulse width modulation concept the purpose of a motor speed controller is to drive a system at the demanded speed. Pwm based speed control for a dc motor international journal of.

A mechanism that can be used as a guideline in dc motor control is the longer the. This method is very easy to implement and has high efficiency. Pdf speed control of dc motor by using pwm technique. Controlling of dc motor using the pulse width modulation pwm. Dc motor speed control using pic microcontroller pwm method. Then the pwm pulse width modulation technique is most effective.

Arduino is directly connected to pc through the usb cable and command is given to arduino on serial monitor of the arduino ide. Hence, if voltage across motor terminal is varied, then speed can also be varied. Apr 10, 2017 so, lets get started with dc motor speed control using arduino uno. Speed control of dc motor using pwm technique pdf projects. Efficiency and reliability are the key features for the development of advanced motor drives. Pwm control using arduino learn to control dc motor speed. Principle operation of brushless dc bldc motor 8 3. This video shows about how to control a dc motor speed with pulse width modulation keeping frequency constant and varying duty cycle. The modulation is a process of varying the parameter of a carrier signal in accordance with the instantaneous value of the message signal. But in this tutorial, we are explaining simple and easy way by using the pulse width modulation pwm. We have explained pwm in this tutorial using 2 examples which will help you learn how to control led brightness using pwm and how to control dc motor speed using pwm. By controlling the speed of the motor, you can vary the speed of the motor according to the requirements and can get the required operation.

A more efficient way to proceed is by using pulse width modulation technique to manage the speed of our dc motor. How to use l298n to control dc motor with arduino instructables. Dc motor with speed and current closed loops, driven by etpu on mcf523x, rev. Speed control of dc motor using microcontroller semantic. Modeling of speed control of bldc motor drive system 18 1. In this project we are going to employ pwm technique for controlling the speed of dc motor. For example, cpu fans, fume extinguishers, toy cars etc. In the previous projects, we have seen a simple dc motor control using lpc2148 and push buttons and also controlling of a servo motor using the same components.

The enable a and enable b pins are used for enabling and controlling the speed of the motor. Pwm control is a very commonly used method for controlling the power across loads. Armature voltage is varied by pulse width modulation pwm of input dc voltage. Apr 03, 2016 in this video i take a look at a dc motor controller and explain how it works. Measure position and speed control of a dc motor using an. The objective of this paper is to provide an efficient and simple method for controlling the speed of dc motors using the pulse width modulation. In this project dc motors speed is controlled by sending the command through pc. Pdf speed control of bldc motor using pwm technique s. Mysweety tb6600 4a 942v stepper motor driver cnc controller, stepper motor driver 4. There are several techniques for controlling the speed of dc motor. Veermata jijabai technological institute 25 speed control of dc motor by using pwm technique 1. In this project, i will show how speed control of dc motor can be implemented using 555 and pulse width modulation pwm. On the contrary, pulse width modulation is the best method to control dc voltage applied to the terminal of the armature.

The ampl itude of the appl ied voltage is adjusted using the pwm technique. Apr 27, 2019 here is a simple project on how to control fan or dc motor speed with microchip pic16f877 microcontroller. Dc motor speed control using arduino uno circuit digest. Abstractthe speed control of direct current dc motor for. Controlling the speed of dc motor can be done by different ways like using a potentiometer and also by a controlled current to the armature. Pulse width modulation used for motor control electronicstutorials. The speed of dc motor is directly proportional to the voltage applied across its terminals. If it is the only reason it seems odd to use pwm equipment for simple demonstrations. Pwm just turns on and off the motor very quickly, so if you want the motor to go slowly, the duty cycle ratio of on to off time has to be more off than on. Dc motor speed control with pulse width modulation pwm method of the infrared remote control.

Automation results into better quality, increased production an reduced costs. This paper presents speed control of dc motor using an 8051 series microcontroller. Apr 24, 2017 to control the speed of a motor, there are different ways. We did this to test the proposition that pwm is better than steady dc in terms of torque at low speed. Pdf pwm speed control of dc motor based on singular. Residential and commercial appliances such as refrigerators and air conditioning systems use conventional motor drive technology. In this paper, to control the speed of dc motor using pulse width modulation pwm method.

Ne555 based pwm dc motor speed controller circuit with pcb layout. Next to stepper motors, the permanent magnet dc motor pmdc is the. Hiletgo 12v40v 10a pwm dc motor speed control switch controller voltage regulator 4. Armature voltage is varied by pulse width modulation pwm of input dc voltage by using the developed microcontrollers program. Mar 29, 2011 analogwrite commands only work on arduino pins that support pwm because internal timer support is needed and they are only hardwired to specify arudino pin numbers, depending on what processor chip your board uses mega board has more timers then uno board. Dc motor with speed and current closed loops, driven by etpu. In our robotics applications we may have to control the speed of the dc motor. Pulsewidth modulation pwm or dutycycle variation methods are commonly used in speed control of dc motors.

Experiment 5 dc motor speed control walter scott, jr. Dc motor speed control is one of the most useful features of the motor. Pwm control using arduinohow to control dc motor and led. Aug 26, 2018 speed control of dc motor with pc interface is an easy diy project. Dc motor speed controller circuit using pwm electrical. There are numerous ways to control the speed of motoror fan. Before going further we need to discuss the hbridge. Direction of rotation of dc motor is changed by initiating an interrupt signal to the microcontroller using push switches. May 19, 2017 i already posted about interfacing dc motor with pic microcontroller. Dec 29, 2016 in the previous projects, we have seen a simple dc motor control using lpc2148 and push buttons and also controlling of a servo motor using the same components. The optimization of dc motor uses requires speed control that can be done using pulse width modulation pwm 5.