DC motors are widely used in industries because of its versatile characteristics and because of power electronics devices its controlling is becoming sophisticated and precise, but on the other hand because of the power electronics devices power factor and total harmonics distortion problem is becoming more prominent. In this paper DC motor control methodology is proposed which includes thyristor based converters but with improved power factor and total harmonics distortion.

Electrical drives play an important role in rapidly growing industrial era, so the controlling of electrical drives is also important. Variable speed drives are the major part of power system, microelectronic, power plant and so on. Conventional controlling methods of electrical drives needed mathematical model of control process which was very tedious, that problem is solved by artificial intelligence which contains both hard computation and soft computation. Artificial intelligence has found high application in most nonlinear systems same as motor drive. As no mathematical model is needed for artificial intelligent system so efficiency and reliability of drives increase and volume, weight and cost of drives decrease. Soft starters are widely used with electronic motor as it provides improved operating characteristics and better control. Soft starter also reduces the wear and tear effects on motor and their associated drive systems which in turn reduces maintenance, conserve energy and plays a significant part in improving system performance so the escalators, pumps, elevators and conveyor belts can be operated more effectively with soft starter.