International Research Journal of Engineering and Technology (IRJET) e-ISSN: 2395-0056 Volume: 05 Issue: 03 | Mar-2018 www.irjet.net p-ISSN: 2395-0072 © 2018, IRJET | Impact Factor value: 6.171 | ISO 9001:2008 Certified Journal | Page 3433 CLOSED LOOP SPEED CONTROL OF DC MOTOR BY USING PI CONTROLLER 1 Shubham Bhosale, 2 Bhushan Bhere, 3 Kiran Bhangare, 4 Abhijeet Tohake, 5 Prof.Jayashri Madrewar 1,2,3,4 BE Student(Elect), Dilkap Research Institute of Engineering & Management Studies Neral, India 5 Prof, Dept. of Eectrical Dilkap Research Institute of Engineering & Management Studies Neral, India -------------------------------------------------------------------------------***---------------------------------------------------------------------------- ABSTRACT:- The development in technology has increased the demand of industries in present time. In this project the controlling speed of dc motor is done using Proportional Integral (PI) controller. The speed controller is a very important aspect, which is commonly used. PI has been used as a main aspect for controlling the speed. In this paper the input of the motor is changed so as to change the duty cycle of motor. IR sensor is used for sensing and then actual speed is displayed on LCD connected on arduino. Then reference speed is given by the potentiometer to the arduino then it will change the duty cycle and speed is varied. Key Words: Arduino, LCD, protious, IR sensor, PI controller, DC motor. 1. INTRODUCTION Today’s industries are increasingly demanding process automation in all sectors. We are using speed control of DC motor using PI control the speed easily control increase the production and reduce the cost. Dc motor have long been primary means of electrical traction DC motor are always a good providing ground for advance control the speed of the motor. Normally close loop operation of PI controller inner current loop and outer speed loop is employ for speed control. The dc motor can provide a high starting torque control over a wide speed range, both below and above the rated speed can be very easily achieved. The method of speed control is simpler and less expensive. 2. WORKING PRICIPAL At given to the ac supply to the transformer then the voltage is been step down to the desired voltage .Regulator will give a pure DC supply to the arduino and then the supply is given to the motor and it will start at its desired speed. This speed has been sensed by the IR sensor and actual speed is given to the arduino and that actual speed is displayed on the LCD and the reference speed is given to the arduino and PI will generate the error and it will change the duty cycle by using the Potentiometer we will change the input of the dc drive is changed. By changing the input voltage of the DC drive and then the changed voltage supply with the help of the potentiometer will change the speed of the motor and IR sensor will sense the changed speed and that will be given to the microcontroller and then it is been displayed on the LCD. Fig.1 Block Diagram 3. ARDUINO OF PI CONTROLLER 1) We are using a microcontroller name as a Arduino. it is a single board. it is a easy access and directly connected to PC via USB port and the software used to control the Arduino. it can be in the language of c or c ++.the hardware board we are using in at 328. The main reason select the Arduino that it is a cheaper and highly available in the market. it is highly used by the student 2) Example. used Home Automation, projects, technical events 3) Arduino has been operated by the protious software and this software is license copy available in the market. Arduino is highly use microcontroller which having digital and analogue input output pins. We are connected to the digital output pins of the LCD