International Journal of Energy Technology and Management
| Volume 1, No. 1, 2017, pp 29-36 | ||
| Abstract |
Modified Microcontroller based Speed Control of DC motor using PWM
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Abstract
In present time, the use of DC motor in industrial applications is very wide. Properties like easy controllability, effective and precise output makes it suitable for large commercial purposes. Speed control of DC motor has been always one of the prime issue and plays a vital role where the speed needs to be precise and a correcting signal is needed to operate the motor at constant speed. In this paper, we discuss PWM (Pulse Width Modulation) technique to form a closed loop system for the speed control of DC motors. The system consists of Microcontroller 51 series 89S52, L293D motor driver, optical sensor, comparator and 16x2 dot matrix LCD display. The optical sensor detects the instantaneous speed at which the motor is running. The microcontroller varies the duty cycle continuously in a closed loop system until the speed comes to a predetermined level.