(Solved): M M 1,-1, RY Diverter resistance Series motor Diagram (2) 3. A shunt DC motor operates from 400V d. ...

M M 1,-1, RY Diverter resistance Series motor Diagram (2) 3. A shunt DC motor operates from 400V d. c. supply and runs at 30 rad/s when its armature current is 100A. The effective resistance of the armature circuit is 0.222. The speed of the motor is controlled by using series resistance in the armature circuits for speed below 30 rad/s, and by using field resistance for speed above 30 rad/s. Considering Diagram (3) calculate the speed of the motor when la -50A and, (a) The series armature control resistance is set to 1.2, the shunt field remaining constant. 15 Marks (b) The above resistance is zero, but the field resistance is set to reduce the flux by 30%. 15 Marks 1, DC supply RV Shunt field Shunt motor Shunt motor Diagram (3)