Last but not least, a graph of speed versus time is obtained by using. Brushless dc motor control with pic16f887 microcontroller. Generally, a dc motor consists of either an electromagnet or a permanent magnet and a wounded coil known as the armature. May 05, 2016 dc motor control with pic16f877a and l293d ccs c code. Servo motor control by using microcontroller pic16f877a. Dec 25, 2015 here is a simple project on how to control fan or dc motor speed uisng pic 16f877 microcontroller.
There are numerous ways to control the speed of motor or fan. Jul 09, 2016 the best method for speed control of dc motor is the use of pulse width modulation technique. Motor speed will be controlled using a potentiometer as input in a voltage divider. Simple analogue bidirectional dc motor speed control. S1 for increasing duty cycle and s2 for decreasing the same. In this tutorial we will see how to control the speed of a dc motor using pulse width modulation.
Open your arduino software, copy and paste the source code given below in your software. Fan speed control system using pic16f877a microcontroller according to the temperature sensor readings, the duty cycle will be automatically changed for controlling fan speed. These output pwm signals from mcu with various duty cycle are used to controlling the speed and. Then the pwmpulse width modulation technique is used. Here we are using 12v dc motor and average dc value delivered to motor can be varied by varying the duty ratio of the pwm. Dc motor control with pic16f877a and l293d proteus. In this example project dc motor is interfaced with pic microcontroller using l293d motor driver. By varying the pwm signal from microcontroller, the speed of dc motor is controlled. I already posted about interfacing dc motor with pic microcontroller.
Aug 21, 20 pic 16f877a pwm dc motor speed control mikro c program in this mikro c embedded c program, two input switches are used to control the duty cycle of pwm signal. Temperature controlled fan using pic 16f877a gadgetronicx. Pwm signals are widely generated from microcontroller. Dc motor speed control with arduino in proteus isis. Dc motor speed control using arduino the engineering.
Pwm signals can be generated in our pic microcontroller by using the ccp compare capture pwm module. Dc motor control with pic16f877a and l293d circuit. The speed of rotation has to be controlled as well. Why is pwm used to control dc motor speed instead of using a variable resistance. Obviously with low pulse width, speed of motor gets reduced. Todays project topic is dc motor speed control using microcontroller pic16f877a and we are sharing full project report of it.
Speed control of dc motor with microcontroller xc8. By studying paper, firstly they are giving the supply to microcontroller. There are many applications of dc motors, where we need a variable speed of dc motor. Todays industries are increasingly demanding process automation in all sectors. The variable speed drives, which can control the speed of a. Based on the sensed temperature the speed of the motor is controlled using pwm.
Using pic i have to design the gate drive circuit for the dc dc converter connected to the motor. In this paper a dual open loop speed control system based on two independent pwm signals of small permanent magnet dc pmdc motors using pic16f877a microcontroller mcu has been designed and. Also there is a push button and three pull up resistors for pins sw, dt and clk. Series variable speed dc motor controller 12v uses a 555 timer ic as a pwm pulse generator to regulate the motor speed dc12 volt. Shinde krishnat arvind speed control of dc motor using pic. And the pot r1 varies width of output pulse applied to hbridge circuit. The microcontroller pic16f877a reads ra0 analog value and stores the digital value on variable i, this variable is used to set duty cycle of the active pwm pwm1. It can control dc motors having 12 v or 500 ma current ratings. Dc 20 mhz clock input dc 200 ns instruction cycle up to 8k x 14 words of flash program memory, up to 368 x 8 bytes of data memory ram, up to 256 x 8 bytes of eeprom data memory pinout compatible to other 28pin or 4044pin pic16cxxx and pic16fxxx microcontrollers peripheral features. The speed of dc motor is controlled by pwm pulse width modulation technique.
Apr 08, 2018 in this project, i will show how speed control of dc motor can be implemented using 555 and pulse width modulation pwm. The current work allows controlling the speed of a dc motor in both forward and reversing direction, from fully off to fully on. The circuit is used to control speed of dc motor by using pwm technique. The main core of this project is to design a speed control system of dc motor by using microcontroller.
Direction control of dc motor using arduino in proteus. Dc motor speed control using pwm with pic microcontroller. Microcontroller based dc motor speed control using pwm technique conference paper pdf available december 2012 with 14,158 reads how we measure reads. I have to sense the speed of the motor and give to the pic. Modeling, simulation and implementation of speed control. May 21, 2015 pulse width modulation is the one of the simple and most commonly used technique to produce analog voltages from digital signals. Speed control behavior with pwm the motor will see a very low power supply impedance, even though the power supply is constantly switching between high and low voltages. Generating pwm using pic microcontroller, in this tutorial, you will learn to generate a pwm signal with the help of pic microcontroller 16f877a. There are lots of designs on the internet for dc power controllers using pulse width modulation pwm to control the speed of a motor or power to a resistive load. In this work, designing motor bidirectional dc control circuit using pulse width modulation pwm based on an operational amplifier model lm324 is implemented. Block diagram the fig 4 describes the overall system design for the closed loop control of bldc motor. Speed control of servo motor using microcontroller. The pic16f877a microcontroller is programmed to generate two periodic pwm signals from its capturecomparepwm ccp modules. Speed control of a dc motor using pwm video matlab.
Dc motor and fan speed control using pic 16f877 microcontroller. Speed control of dc motor using pulse width modulation, 555. Modeling, simulation and implementation of speed control of. This system will be able to control the dc motor speed at desired speed regardless the changes of load. May 19, 2017 interfacing dc motor with pic microcontroller. It is a closedloop real time control system, where optical encoder built in this project is coupled to the motor shaft to provide the feedback speed signal to controller. Apr 27, 2019 here is a simple project on how to control fan or dc motor speed with microchip pic16f877 microcontroller. Why is pwm used to control dc motor speed instead of using. For example, cpu fans, fume extinguishers, toy cars etc. We use dc motors in many systems in our day to day life. In this project, i will show how speed control of dc motor can be implemented using 555 and pulse width modulation pwm. A wide variety of pwm dc motor speed controller options are available to you, there are 589 suppliers who sells pwm dc motor speed controller on, mainly located in asia. Speed control of dc motor using pic microcontroller.
The following topic shows how to control speed and direct of a dc motor using pic16f877a and hbridge circuit. There are numerous ways to control the speed of motoror fan. Pdf speed control of dc motor by using pwm technique. Ic 555 is the popular timer chip used to make timer circuits. Mar, 2018 this example shows how to use a rotary encoder with pic16f877a microcontroller in order to control the speed and direction of rotation of a dc motor. Bidirectional speed control of dc motor based on pulse width. Brushless dc motor control with pic16f887 microcontroller c. Speed control of dc motor using capturecomparepulse width. How to control dc motor speed using pwm on atmega32. Pdf microcontroller based dc motor speed control using pwm. Oct 29, 2018 pwm based dc motor speed control using microcontroller circuit principle the heart of this project is the 8051 microcontroller. Direct current is applied to the armature by means of a carbon brush or by means of electromagnetic induction. The pic16f877a microcontroller is programmed to generate two periodic pwm signals from its capturecompare pwm ccp modules.
Apr 10, 2017 speed control of dc motor using pic microcontroller. In this project we are going to see how to build a bldc motor controller using the same microcontroller and l293d motor driver chip instead of the 3 phase bridge circuit. If you have worked with any variant of the 8051 microcontroller, you might remember that 8051 doesnt have a dedicated pwm circuitry to enable pwm mode. Potentiometer a2d and pic 16f877a for dc motor control. With the help of pwm it is possible to control the average power delivered to a load and by thus we can easily regulate the speed of the dc motor. This is a method to control the output voltage with the of constant frequency switching and by adjusting on duration of switching and in other words by changing duty cycle of switching. Here is a simple project on how to control fan or dc motor speed with microchip pic16f877 microcontroller. Pulse width modulation pwm with pic microcontroller.
This unit drives a power mosfet amplifier, which in turn supplies a pwm voltage to the dc motor. If you are new to electronics, we have a detailed article explaining pulse width modulation. Most of these use analogue methods to generate the pwm signal which in turn drives a power mosfet or transistor. In this article, we are going to learn how to control the speed of a dc motor using the pulse width modulation of a pic microcontroller.
Dc motor speed control using microcontroller pic16f877a. Pwm dc motor speed controller circuit using pic16f877a. Pwm control using arduinohow to control dc motor and led. Speed control of dc motor using pulsewidth modulation. 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. In our robotics applications we may have to control the speed of the dc motor. This is a very good project work for final year electronics and electrical students. Then the pwm pulse width modulation technique is most effective. Design and implementation of dc motor speed control based. Dc motor speed control using arduino the engineering projects. But the most useful technique is the use of pulse width modulation pwm to speed of dc motor.
This method is very easy to implement and has high efficiency. The motor is driven using a driver ic l293d, see a brief explanation on its working and wiring here. Dc motor speed control using microcontroller pic 16f877a. Pwm based dc motor speed control using microcontroller. Dc motor control with pic16f877a and l293d proteus simulation. The width of signals generated by the pwm varies, and these signals are used to drive the motors which in turn varies the speed based on the on state. The top countries of suppliers are united states, china, from which the percentage of pwm dc motor speed controller supply is 1%, 99% respectively. Before you continue with this tutorial, you must read first. I have to sense the speed of the motor and give to the pic and control the gate drive accordingly. By using pwm we can easily control the average power delivered to a load and by thus we can easily control the speed of the dc motor.
Pdf bidirectional speed control of dc motor based on. For example, it has applications in electric cars, trucks, and aircraft. Automatic fan speed control using pic16f877a microcontroller. We will provide pulse width modulation examples with mikroc and mplab xc8 compiler. Pwm control is a very commonly used method for controlling the power across loads. Fan speed control system using pic16f877a microcontroller. Pic microcontroller pwm tutorial using mplab and xc8. Pwm using pic microcontroller with examples, in this tutorial, you will learn to generate a pwm signal with the help of pic microcontroller pic16f877a.
Using pic i have to design the gate drive circuit for the dcdc converter connected to the motor. Introduction of pulse width modulation, speed control and. Automation results into better quality, increased production an reduced costs. In the circuit there are 3 push buttons, 2 for selecting the direction and the other one for stopping the motor. Apr 05, 2016 how to control speed of dc motor using pulse width moduation and duty cycle, how to change speed using variable voltage. Two push button switches are provided to control the speed of the motor. It has a wide variety of applications such as digital to analog converter dac, dc motor speed control, sine wave inverters, brightness control etc. In this project i applied 3 pwm signals to high side mosfets only one pwm active at a time. Pic16f877a timer2 is configured to generate a pwm frequency of 488hz and the microcontroller runs with 8mhz crystal oscillator. The best method for speed control of dc motor is the use of pulse width modulation technique. In this chapter, speed control of a dc motor using pulse width modulation pwm technique is described. Jul 19, 2016 sensored brushless dc bldc motor control with pic16f877a microcontroller i made a sensored bldc motor speed controller using pic16f877a and 3 phase bridge circuit. This feature is enabled in uno to get variable voltage over constant voltage.
So this is the simple circuit control speed and direction of dc motor. How to control speed of dc motor using pulse width moduation and duty cycle, how to change speed using variable voltage. Pwm dc motor controller for microchip pic microcontrollers. The duty cycle is defined as the percentage of digital high to digital low plus digital high pulsewidth during a pwm period. Speed control of dc motor using pic microcontroller the. Using pwm pulse width modulation to control a device is a common practice in embedded systems. If pwm is supposed to be a new concept for the beginner, then by the end of the tutorial, you will have a sound knowledge of this term and will be able to work. Dc motor control with pic16f877a practical example of.
These output pwm signals from mcu with various duty cycle are used to controlling the speed and direction of dc. Pwm using pic microcontroller example in mplab xc8 and. The microcontroller will send the pwm signal through pinrc2 in portc to the transistor which works as a control to the fan. Pulsewidth modulation pwm or dutycycle variation methods are commonly used in speed control of dc motors. Here is a simple project on how to control fan or dc motor speed uisng pic 16f877 microcontroller. It then compares the actual speed of the motor with the reference speed and generates a suitable control signal which is fed into the triggering unit. Pwm is supposed to be a new concept for the beginners and by the end of the tutorial, you will have a sound knowledge of this term and will be able to work with it in different projects. Dc motor speed control using pwm with pic 16 f877a youtube. Pulse width modulation is the one of the simple and most commonly used technique to produce analog voltages from digital signals. Keywords dc shunt motor, optical encoder, pulse width modulation pwm, hbridge. Pwm based dc motor speed control using microcontroller circuit principle the heart of this project is the 8051 microcontroller. But when it comes to controlling the speed using microcontrollers. You may think that a variable resistor in series with a dc motor can control its speed. The resolution of our pwm signal is 10bit, that is for a value of 0 there will be a duty cycle of 0% and for a value of 1024 210 there be a duty cycle of 100%.
Dc motor speeddirection control using pic16f877a and. Several temperature ranges was set in the code to vary the motor speed based on the level of temperature sensed. The voltage will be measured using ra0an0 or which ever of the analog pins on the pic. Above image illustrates the variation of speed based on the width of the pulse. The result is that the motor has a much higher torque. Dc motor speed control using pwm of pic microcontroller. Dc motor speed and direction control with pic16f877a and hbridge. This paper presents a design, simulation and implementation of pulse width modulation pwm speed control system of dc motor using microcontroller mcu. Feedback from the hall sensor monitors actual fan rpm and indicate when. Jan 26, 20 in this tutorial we will see how to control the speed of a dc motor using pulse width modulation. Pwm using pic microcontroller example in mplab xc8 and mikroc. Bidirectional speed control of dc motor based on pulse. Design a speed controller for a dc motor using pulsewidth modulation pwm.
The optimization of dc motor uses requires speed control that can be done using pulse width modulation pwm 5. Pdf microcontroller based dc motor speed control using. Speed control of dc motor using capturecomparepulse. Dc motor control with pic16f877a practical example of pic pwm. This project is mainly concerned on dc motor speed control system by using microcontroller pic 16f877a. According to the temperature sensor readings, the duty cycle will be automatically changed for controlling fan speed. In this article we explain how to do pwm pulse width modulation control using arduino. The measured voltage will used to set the value of a pwm signal that will go to an hbridge. This example shows how to use a rotary encoder with pic16f877a microcontroller in order to control the speed and direction of rotation of a dc motor.
Dc motor speeddirection control using pic16f877a and rotary. The mcu uses a pwm to control the period of the motor drivers and, thus set fan speed. This project is mainly focus on dc motor speed control system by using microcontroller pic 16f877a. Pulse width modulation pwm technique is used where its signal is generated in microcontroller. A mechanism that can be used as a guideline in dc motor control is the longer the. The laboratory test results confirm that the model created to control the speed of dc motor is operated at different speeds by varying duty cycle of pwm signal. Dc motor speed control using pic microcontroller pwm method. The pic16f887 runs with 20mhz crystal oscillator 5 mips, mclr pin function is disabled.
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