Hey friends this is my 3rd year be project speed control of dc motor which i could like to share with you. Pdf microcontroller based dc motor speed control using. And the direction of the dc motor can be controlled using hbridge circuit which allows us to reverse terminals polarity of the motor. I already posted about interfacing dc motor with pic microcontroller. Learn how to control the speed of a dc motor with pwm of a pic. A potentiometer is connected to analog channel 0 an0 of the pic. By varying the potentiometer, the pwm duty cycle will be varied as well.
So, if power to a motor is controlled like this, the motor s speed can be controlled. In the circuit there are 3 push buttons, 2 for selecting the direction and the other one for stopping the motor. Dc motor speed control using pic microcontroller pwm method. The variable speed drives, which can control the speed of a. Suppose we attempt to control speed by driving motor with a constant.
The code is written in assembly to simplify i have first explained separately lcd interfacing hex keypad interfacing, motor interfacing. Dc motor control with pic16f877a and l293d circuit. For example, it has applications in electric cars, trucks, and aircraft. So, to control the speed of the dc motor, i have used pwm. Dc motor speed and direction control with pic16f877a and h. This tutorial is about dc motor speed control with a pic microcontroller using the pwm method.
Dc motor speed and direction control with pic16f877a and hbridge. By adjusting the pulse width, the speed of a motor can be efficiently controlled without larger linear power stages. Speed control of dc motor using pic microcontroller, by variable pwm with pic16f microcontroller with complete schematic and code. The following topic shows how to control speed and direct of a dc motor using pic16f877a and hbridge circuit. Picmicro dc motor control tips n tricks microchip technology. Dc motor speed control using pwm of pic microcontroller. We can achieve speed control of dc motor using mechanical or electrical techniques but they require large size hardware to implement but a microcontroller based system provides an easy way to control the speed of dc motor. Pdf speed control of dc motor by using pwm technique. Here we will use a technique called pwm pulse width modulation to control the speed of dc 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. In the interfacing dc motor with pic microcontroller article, we learnt how to interface. Speed control of dc motor using pic 16 f 877 a microcontroller.
Dc motors are used in industrial, commercial and domestic applications. Armature voltage is varied by pulse width modulation pwm of input dc voltage. We can control the speed of dc motor using pwm technique as shown in the following topic. Automation results into better quality, increased production an reduced costs. In this you will learn how to interface lcd,hex keypad and motor. Pdf bidirectional speed control of dc motor based on. Dc motor speed control with pic16f877a and ccs pic c compiler. This paper reports a microcontroller based control system to change the speed and direction of rotation of dc motor. Dc motor control with pic16f877a and l293d proteus. An899, brushless dc motor control using pic18fxx41 mcus. Pwm based dc motor speed control using microcontroller. So, this provides an efficient way of controlling the power to a load. Dc motor speed control using pwm with pic microcontroller.
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