![]() The overall result of this is that there is an increase in the speed of the motor but decrease in the motor torque which is not desired. What about power factor how we can improve power factor? Now the power factor is directly related to reactance of the field and armature circuit and we can reduce the field winding reactance by reducing the number of turns in the field winding.īut there is one problem: on reducing the number of turns, field mmf will decrease and due to this the air gap flux decrease. This is our first modification to DC series motor. Now in order to reduce the eddy currents there is need to laminate the yoke and field core. ![]() ![]() So considering above points we can say that we don’t have good performance of DC series motor on the application of AC supply.
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