Behavioral Analysis of a Universal Motor When Operated On DC and AC Supply

In this paper, a universal motor which is actually a modification of dc series motor is made to run on a particular voltage level of DC supply and on same RMS value of AC supply. DC series motor with certain modification for the purpose of reducing losses when run on AC supply is called AC series motor or Universal motor. Analysis of behavior of Universal motor is done through a SIMULINK model. Various scopes have been used to monitor the value of current, voltage and speed of the motor. Comparison between speed characteristics of the motor when made to operate on same voltage AC and DC conclude that motor runs on a higher speed on dc supply, thus proving that although motor is universal but performance on dc supply is better than that on ac. Also other parameters are better in dc as compared to that in ac supply.