Question: 1 2 2 kW , 2 3 0 V , 8 5 0 rpm , 5 6 A separately excited DC motor is fed from

122 kW,230 V,850 rpm,56 A separately excited DC motor is fed from a 3-0 fully-controlled converter, which itself is supplied from a 180 V,50 Hz.3-a a c mains. Its Ra is 0.25\Omega . Assume continuous conduction mode of operation. Find the rectifier firing angle for the rated torque and rated speed operation? ii) Also find the inverter firing angle for the rated braking torque and a speed of 600 rpm in the reverse direction?

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