Starters for the DC Shunt Wound and Compound Wound Motors

Abstract: DC motor unlike other types of motor has a very high starting current that has the potential of damaging the internal circuit of the armature winding of dc motor, if not restricted to some limited value. This limitation to the starting current of dc motor is brought about by means of the starter. Thus starting methods of dc motor is facilitated by means of a starter, or rather a device containing a variable resistance connected in series to the armature winding so as to limit the starting current of dc motor to a desired optimum value taking into consideration the safety aspect of the motor. A starter allows a DC motor or a DC motor - controlled device to turn ON or OFF. This paper discuss the various types of starters that are used for starting DC motors and also suggests the alternative methods that can be used to construct a dc starter to overcome the limitations of the previously existing starters.

Keywords: Soft Starter, IGBT, Electromagnet, Overload Relay (OLR), SCR.