Smooth Starter for DC Shunt Motor using Buck-Boost Power Converter

This Paper deals with a smooth dc motor starter using dc/dc buck-boost converter simulated using Matlab - SIMULINK. This type of converter is mainly used to regulate the desired output voltage level and maintain dc motor speed constant. The dc motor widely uses high precision digital controllers. The dc motor is a self-starting motor, having various starting methods. The main limitation of 4-point starter is that it has no control on the high speed of the motor. The field current automatically reduces to zero due to which the field winding of the motor gets opened under running condition, thus resulting in more power loss in the external resistance of the four point starter. These limitations are overcome by the present research work. The obtained results show that the starting current of dc shunt motor has been controlled with in the desired limit.