International Research Journal of Engineering and Technology (IRJET) Volume: 04 Issue: 01 | Jan -2017
www.irjet.net
e-ISSN: 2395 -0056 p-ISSN: 2395-0072
Speed Control of Separately Excited DC Motor Using Chopper Kaustubh S. Deshmukh, Master in Technology, Electrical Engineering, G H Raisoni College of Engineering and Technology, Nagpur, Maharashtra, India Prof. Rutuja S Hiware, Electrical Engineering, G H Raisoni College of Engineering and Technology, Nagpur, Maharashtra, India --------------------------------------------------------------------------------------------------------------------------------------------------------------
Abstract - The Aim of the paper is to control the separately excited dc motor by using the IGBT based chopper. The speed of separately excited dc motor can be control by changing the armature voltage and changing field flux. Due to this the speed can be controlled for below rated speed and speed above the rated speed, respectively. In this paper, the motor speed below and upto the rated speed can be achieved by Changing the Armature voltage. The Armature voltage can be controlled by Using IGBT based chopper. The IGBT chopper receives signal from controller and Adjustable voltage is given to the armature of dc motor according to the wanted speed. The advantages to employed this technique is that the Speed varies proportionally with armature voltage and varies inversely with field voltage by keeping field and armature voltage constant respectively. The IGBT employed chopper i.e. power module gives smoother control as compared with the SCR based circuit. By employing this system, we can chop the frequency and speed of DC motor can be control. The two controllers are employed here, speed controller and current controller. Here, we are employing the PI type controller i.e. proportional-integral type. The aim of using PI type controller is it eliminates the delay and provide fast control. It give a very fast response to sudden changes in motor speed. The simulation of model is done and analyzed in MATLAB (Simulink) under Different renge speed and torque condition. widely in position control system and variable speed drives. DC motors has excellent control of speed for speeding up and slowing down. In a DC motor the supply is directly connects to the field of the motor and as results a specific voltage control is obtained, which is necessary for control of speed and torque. DC drives are backbone of industrial applications due its advantages like simplicity Reliable, low cost, flexible etc. DC drives are cheaper for low horsepower ratings. DC motors are generally consider as flexible speed machines and a wide range of options have developed for this purpose.
1. Introduction Demanding of Industrial Sector for high performance electrical drives is increases nowadays. Variable speed applications are gradually increases in industrial sector. Therefor it is needed to create high performance, high flexible electrical drives. Electrical motor, Power controller and energy transmitting medium are the main Constituents of Electrical drives. Nowadays, power electronics converter are cast instates of power controller. High performance motor drive system has special features such as good dynamic speed command and load regulating reaction Electric drives are categories as: DC drives system and AC drives system. DC drives are widely used than AC drives, in applications such as, good speed regulation adjustable speed control, braking and reversing frequent starting. Some important applications are mine winders, paper mills, hoists, rolling mills, printing presses, traction, machine tools, textile mills, cranes, excavators. DC motors are used Š 2017, IRJET
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Impact Factor value: 5.181
There are several techniques of speed control of DC drives – armature voltage control, armature resistance control and field flux control. In this paper, the motor speed under and upto the rated speed can be achieved by Changing the Armature voltage. The Armature voltage can be controlled by Using IGBT based chopper. Using Chopper as power converter and PI as speed and current controller, |
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