Q5- Adjust a fire angle for a three-phase full-wave semi-controlled converter to feed the separately exciter DC motor to get a load torque can be reached to 750 rpm. When the supply voltage of converter is 150 volts per-phase and the absorbed current through the armature 40A with resistance 0.2 a and a constant back emf 0.4v/rpm. Then find the maximum speed for motor assume the previous parameters values are a constant.

600V, DC series motor operates at 600 rpm and rated load. Armature resistance 0.1 ohm and series fieldwinding resistance is 0.05 ohms. At full load, the motor draws 195 A current.  A) Find the reverse(back) EMF value at full load.   B) Find the power and internal moment produced in the armature under full load.

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. A Short Shunt Compound DC Generator supplies 100-amp at 110-volt. Series field resistance  of 0.04-ohm, armature resistance is 0.05-ohm, shunt field resistance of 57- ohm. Iron and  friction losses mount to 852-watts. Find the power input and the over all efficiency.