Review Paper on Controlling the Speed of DC Motor with High Accuracy and Demerits of Other Speed Controlling Techniques

Abstract: The presented paper is concerned with the speed controlling of dc motor by using embedded system, which is easy to use and provide us very high accuracy. Here we have compared the different type of techniques which are used to control the speed of DC motor. We have used CMOS 8-bit microcontroller with 8K bytes in system programmable flash AT895S2. The most important advantage of a DC motor is that we can vary the relationship of speed-torque as per our requirement & for that purpose we have use a simple technique which is known as Pulse Width Modulation, which is used to produce low and high pulses. The pulses produce is the cause of changing speed of motor. Therefore to achieve this we have use a microcontroller (AT89S52), which can be programmable to set the speed by changing the time period of duty cycle in the code