A single-phase full converter is used to control the speed of a 5 hp,110V,1200 rpm, separately excited dc motor. The converter is connected to a single-phase 120V,60 Hz supply. The armature resistance is R=0.4 ohms and armature circuit inductance La=5mH (Assume that the armature current is ripple free). The motor voltage constant is Ko=0.09 V/rpm. 1. Rectifier (or motoring) operation. The dc machine operates as a motor runs at 1000 rpm and carries an armature current of 30 amperes. Assume that motor current is ripple-free. (a) Determine the firing angle a. (b) Determine the power to the motor. (c) c) Determine the supply power factor 2. Inverter operation (regenerative action). The polarity of the motor back emf Ea is reversed ,say by reversing the field excitation. (a) Determine the firing angle to keep the motor current at 30 amperes when the speed is 1000 rpm. (b) Determine the power fed back to the supply at 1000 rpm.