Pwm control of dc motor using pic 16f877a pdf

Pdf bidirectional speed control of dc motor based on pulse. In pulse width modulation, we actually control the switching duty cycle, which is the ratio of ontime to the total time of switching. Using pic i have to design the gate drive circuit for the dc dc converter connected to the motor. This paper presents a design, simulation and implementation of pulse width modulation pwm speed control system of dc motor using microcontroller mcu. In the circuit there are 3 push buttons, 2 for selecting the direction and the other one for stopping the motor. 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.

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. I already posted about interfacing dc motor with pic microcontroller. 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. Dc motor speed and direction control with pic16f877a and hbridge. Pwm dc motor speed controller circuit using pic16f877a. 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. By varying the potentiometer, the pwm duty cycle will be varied as well. Program to run a motor at different speeds using pulse width modulation pwm, controlled by a push button. Keywords dc shunt motor, optical encoder, pulse width modulation pwm, hbridge. These output pwm signals from mcu with various duty cycle are used to controlling the speed and direction of dc. Bidirectional speed control of dc motor based on pulse width. To drive a dc motor or fan through the generated pwm wave you need to build a motor driver circuit. 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.

A mechanism that can be used as a guideline in dc motor control is the longer the. Nov 15, 2016 dc motor speed control with pwm using pic16f877 the speed of a dc motor is directly proportional to the voltage applied across its terminals. Microcontroller output voltage is very low and it can not drive huge loads like dc motors and fan etc. A variable resistor provides a voltage input to the pic which is converted to a digital value using the onboard analogue to digital convertor, this in turn is used to set the pwm duty cycle. Speed control of dc motor using pic microcontroller the. We will provide pulse width modulation examples with mikroc and mplab xc8 compiler. This motor is three phase motor, it has three stator phases that are excited two at a time to create. Pwm signals can be generated in our pic microcontroller by using the ccp compare capture pwm module. In this tutorial we will learn how to control servo motor with pic microcontroller.

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. Todays project topic is dc motor speed control using microcontroller pic16f877a and we are sharing full project report of it. This is a very good project work for final year electronics and electrical students. Using this method, better values of performance parameters like rise time, settling time, fall time, peak overshoot and steady state are achieved. Simple analogue bidirectional dc motor speed control. Dc motor control with pic16f877a and l293d proteus simulation. These output pwm signals from mcu with various duty cycle are used to controlling the speed and.

Using pic i have to design the gate drive circuit for the dcdc converter connected to the motor. L293d is a motor driver ic which can drive heavy loads. The biggest downside of using higher frequencies for pwm control is that the switching looses will be higher, thus wasting power that would normally be used to drive the motor. Generating pwm using pic microcontroller, in this tutorial, you will learn to generate a pwm signal with the help of pic microcontroller 16f877a. Dc motor control with pic16f877a practical example of. Dc motor speed control with pwm using pic16f877 the speed of a dc motor is directly proportional to the voltage applied across its terminals. The fraction of the period for which the signal is on is known as the duty cycle. Dc motor speed control using pwm with pic 16 f877a youtube. 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. 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.

On the contrary, pulse width modulation is the best method to control dc voltage applied to the terminal of the armature. Apr 27, 2019 here is a simple project on how to control fan or dc motor speed with microchip pic16f877 microcontroller. This paper mainly aims at proposing an effective method of speed control of the low power motors like permanent magnet direct current pmdc motor used in the orthopedic surgeries using a natural optimization technique called genetic algorithm. But when it comes to controlling the speed using microcontrollers. Dc motor control with pic16f877a and l293d circuit. For example, cpu fans, fume extinguishers, toy cars etc. Dc motor speed control using microcontroller pic 16f877a.

Genetic algorithm based speed control of pmdc motor using. Pulse width modulation pwm is a technique of controlling the amount of power delivered to an electronic load using an onoff digital signal. Why is pwm used to control dc motor speed instead of using a. Pdf speed control of dc motor using microcontroller. Two push button switches are provided to control the speed of the motor. I have to sense the speed of the motor and give to the pic and control the gate drive accordingly. Dc motor speeddirection control using pic16f877a and. Pulse width modulation pwm technique is used where its signal is generated in microcontroller. How to control dc motor speed using pwm on atmega32. Apr 16, 2016 todays project topic is dc motor speed control using microcontroller pic16f877a and we are sharing full project report of it. May 05, 2016 dc motor control with pic16f877a and l293d ccs c code. The pic16f877a microcontroller is programmed to generate two periodic pwm signals from its capturecompare pwm ccp modules. Then the pwm pulse width modulation technique is most effective.

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 project is mainly concerned on dc motor speed control system by using microcontroller pic 16f877a. Speed control of dc motor using pulsewidth modulation pwm. When the width of pulse is high, the motor will rotate with full speed. Dc motor interfacing with pic microcontroller dc motors need much more current than a microcontroller can provide, so it needs separate drivers. Dc motor speed control using pwm of pic microcontroller mikroc. An n channel logic level mosfet in a low side configuration is driven by the pic to control the output power to the motor. Speed control of a dc motor with pwm and pic16f877 youtube. Dual dc motor speed control based on two independent digital pwm signals using pic16f877a microcontroller. Dc motor speed control using pwm with pic microcontroller. Interfacing servo motor with pic microcontroller using. The duty cycle is defined as the percentage of digital high to digital low plus digital high pulsewidth during a pwm period. Pwm control is a very commonly used method for controlling the power across loads.

Pwm using pic microcontroller example in mplab xc8 and. The following topic shows how to control speed and direct of a dc motor using pic16f877a and 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. Pwm is the best and easy way to control speed of dc motors. Dc motor control with pic16f877a and l293d ccs c code. Aug 21, 20 pic 16f877a pwm dc motor speed control mikro c program. Hbridge microchip pic microcontroller pwm motor controller. Pwm based dc motor speed control using microcontroller circuit principle the heart of this project is the 8051 microcontroller. This is our 11th tutorial of learning pic microcontrollers using mplab and xc8. The pic16f877a has a ccp module, that allows us to use pwm at a hardware level. Dc motor and fan speed control using pic16f877 microcontroller. In this chapter, speed control of a dc motor using pulse width modulation pwm technique is described. In our previous tutorial we learnt how to generate pwm signals using pic microcontroller, the signals were generated based on the value.

First include header file with definitions for specific pic. 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. This system will be able to control the dc motor speed at desired speed regardless the changes of load. So, to control the speed of the dc motor, i have used pwm. For example, it has applications in electric cars, trucks, and aircraft. Pulsewidth modulation pwm or dutycycle variation methods are commonly used in speed control of dc motors. Using pwm pulse width modulation to control a device is a common practice in embedded systems. Programming the pic16f877a microcontroller for speed.

By varying the pwm signal from microcontroller, the speed of dc motor is controlled. Its probably best to experiment with the actual motors in the application. Not consuming extra power is one reason, maybe related to which i think is the main reason to use pwm. The l293d can provide bidirectional drive currents of up to 600ma at voltages from 4. The optimization of dc motor uses requires speed control that can be done using pulse width modulation pwm 5. 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. Speed control of servo motor using microcontroller.

In this example a dc motor is interfaced with pic microcontroller using l293d motor driver as shown on figure 1 above. Dc motor control with pic16f877a practical example of pic pwm. Shinde krishnat arvind speed control of dc motor using pic. Interfacing servo motor with pic microcontroller using mplab. Dc motors need much more current than a microcontroller can provide, so it needs separate drivers. This method is very easy to implement and has high efficiency. The pic16f72 was used in 15 in the control method for dc motor armature voltage control that involves the pulse width modulation pwm based on the hbridge motor circuit. Jul 09, 2016 the best method for speed control of dc motor is the use of pulse width modulation technique. Dc motor speed and direction control with pic16f877a and h. Speed control of dc motor using pic the engineering projects. Speed control of dc motor using pic microcontroller, by variable pwm with. This project uses the above principle to control the. S1 for increasing duty cycle and s2 for decreasing the same.

Shinde krishnat arvind, tarate akshay arun, taur sandip madhukar, and prof. Servo motor control by using microcontroller pic16f877a. Also there is a push button and three pull up resistors for pins sw, dt and clk. It has a wide variety of applications such as digital to analog converter dac, dc motor speed control, sine wave inverters, brightness control etc. Pr2 sets the pwm frequency according to the formula. Why is pwm used to control dc motor speed instead of using. Please refer the datasheet of your microcontroller jan says. Dc motor speed control using pwm with pic microcontroller mikroc.

Mar 29, 2016 dc motor control with pic16f877a ccs pic c code. Dc motor speed control using microcontroller pic16f877a. 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. Feed the pwm signals such that it satisfies the commutation sequence. Frequency of pwm signal is set to 1 khz cc langcvoid main short duty1 16. Here is a simple project on how to control fan or dc motor speed with microchip pic16f877 microcontroller. 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. Different dc motors need different voltages and operating high voltage motor from a low voltage controller is not a feasible option. The average dc value of the signal can be varied by varying the duty cycle. If you are new to electronics, we have a detailed article explaining pulse width modulation. Jayashree deka speed control of dc motor using pic 16f877a microcontroller multidisciplinary journal of research in. Programming the pic16f877a microcontroller for speed control. The below circuit shows interfacing l293d with pic microcontroller to control a dc motor.

In the interfacing dc motor with pic microcontroller article, we learnt how to interface. The best method for speed control of dc motor is the use of pulse width modulation technique. Dc motor speed control using pic microcontroller pwm method. Pwm based dc motor speed control using microcontroller. Last but not least, a graph of speed versus time is obtained by using.

Pic16f877a timer2 is configured to generate a pwm signal with a frequency of 500hz and the microcontroller runs with 8mhz crystal oscillator. Pwm using pic microcontroller with examples, in this tutorial, you will learn to generate a pwm signal with the help of pic microcontroller pic16f877a. You may think that a variable resistor in series with a dc motor can control its speed. The mcu uses a pwm to control the period of the motor drivers and, thus set fan speed. Then the pwm pulse width modulation technique is most effective one. In this article we explain how to do pwm pulse width modulation control using arduino. Speed control of dc motor using capturecomparepulse. The main core of this project is to design a speed control system of dc motor by using microcontroller. This section will detail how to set up a simple program and circuit to control a motor using a pic microcontroller and pwm. Pwm dc motor controller for microchip pic microcontrollers.

This project is mainly focus on dc motor speed control system by using microcontroller pic 16f877a. Generally, a dc motor consists of either an electromagnet or a permanent magnet and a wounded coil known as the armature. Sensored bldc motor control using pic16f877a ccs pic c compiler this topic shows an easy way to drive a cdrom sensored brushless dc motor bldc motor using pic16f877a microcontroller with ccs pic c code. 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. In this mikro c embedded c program, two input switches are used to control the duty cycle of pwm signal. Pic 16f877a pwm dc motor speed control mikro c program. Pwm using pic microcontroller example in mplab xc8 and mikroc. If you are an absolute beginner, then please visit the complete list of pic tutorials here and start learning. Pulse width modulation is the one of the simple and most commonly used technique to produce analog voltages from digital signals. May 21, 2015 pulse width modulation is the one of the simple and most commonly used technique to produce analog voltages from digital signals. 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%. Speed control of dc motor using capturecomparepulse width.

Following things should be taken into account while designing the. 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. 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. If you have already worked with servo motors you can skip the first half of this tutorial but if you are new to servo motor itself then continue reading. Speed control of dc motor using pic microcontroller.

In this project, i will show how speed control of dc motor can be implemented using 555 and pulse width modulation pwm. Block diagram the fig 4 describes the overall system design for the closed loop control of bldc motor. May 19, 2017 interfacing dc motor with pic microcontroller. This tutorial is about dc motor speed control with a pic microcontroller using the pwm method. The adaptive fuzzy controller designed and implemented in 1 is an alternative method of using microcontroller to control the speed of a dc motor. Pdf bidirectional speed control of dc motor based on. 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.

Blog entry hbridge microchip pic microcontroller pwm motor controller january 26, 2009 by rwb, under microcontroller one of the advantages using the microchip pic microcontroller pulse width modulation or pwm for short is. Dc motor control with pic16f877a and l293d proteus. The pwm signal will send to motor driver to vary the voltage supply to motor to maintain at constant speed. A potentiometer is connected to analog channel 0 an0 of the pic. Abstract this paper is intended to control speed of a dc motor using low cost pic16f877a microcontroller. The adaptive fuzzy controller designed and implemented in 1 is an alternative method of using microcontroller to control the speed of a. I have to sense the speed of the motor and give to the pic.

Sensored brushless dc bldc motor control with pic16f877a. The pic16f877a microcontroller is programmed to generate two periodic pwm signals from its capturecomparepwm ccp modules. Direct current is applied to the armature by means of a carbon brush or by means of electromagnetic induction. There are many applications of dc motors, where we need a variable speed of dc motor. In this tutorial we will see how to control the speed of a dc motor using pulse width modulation. Feedback from the hall sensor monitors actual fan rpm and indicate when. In this example project dc motor is interfaced with pic microcontroller using l293d motor driver. Make an hbridge circuit to drive motor or simply use l293d ic to drive the motor. Oct 29, 2018 pwm based dc motor speed control using microcontroller circuit principle the heart of this project is the 8051 microcontroller. Bidirectional speed control of dc motor based on pulse. Pic16f877a timer2 is configured to generate a pwm frequency of 488hz and the microcontroller runs with 8mhz crystal oscillator. There are numerous ways to control the speed of motoror fan.

Jan 26, 20 in this tutorial we will see how to control the speed of a dc motor using pulse width modulation. Pic microcontroller pwm tutorial using mplab and xc8. Pwm control using arduinohow to control dc motor and led. 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. In our robotics applications we may have to control the speed of the dc motor.