Controling of DC Motor Using RF Model Communication

In upcoming days the use of DC motor is widely increases. Many industries such as printing machine tools, excavators, rolling mills etc. They are used the DC machine for various purposes. Due to these the controlling of DC motor is much more important. So in our paper we are using radio frequency model for controlling the speed and direction of DC motor. Motor speed controller is to take a signal representing the required speed and to drive a motor at that speed for that purpose wireless speed and direction control of dc motor by radio frequency technique is very crucial with pulse width modulation and H-Bridge converter. The microcontroller AT89S51 is used to control the dc motor speed and Transistorized h-bridge converter is used for direction control. By adjusting the duty cycle of pulse from Pulse Width Modulation technique simultaneously the terminal voltage of motor is change and hence speed will be vary with terminal voltage. H-Bridge is DC to DC converters used for direction and made by 4 transistor switch across it a diode are connected.