TMS Microcontroller Based PWM Signal Generation for Speed Control of DC Motor

Abstract

In today’s any modern factory all types of AC motors, DC motors, power amplifiers are used. Therefore there is serious need of intelligent devices capable of driving and controlling a wide range of electrical and electromechanical devices. For controlling the speed of DC motor series architecture of variable resistors is not good because it drops excess of energy and flux and armature control methods cannot provide speed control in the desirable range. Therefore DC motor is controlled by Voltage control method in which PWM signal is used to control electromechanical devices and this PWM signal is generated from analog, digital IC and microcontroller. PWM signal obtained from analog or digital IC contains harmonics, therefore mostly PWM signals are generated from (TMS 320 F 28027) Microcontroller. It reduces the hardware complexity and it consumes less power. PWM signal generated using modifying CCP register of microcontroller. DC motor is interfaced with TMS microcontroller through H-bridge driver. H-bridge control the motion of DC motor. PWM signal is generated at four duty cycles for increasing or decreasing the speed of motor.