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A 200V, 1100 RPM, 30A separately excited motor with Ra=0.3 Ohm, La=150mH, is fed from a circulating 3- phase dual converter with AC source

A 200V, 1100 RPM, 30A separately excited motor with Ra=0.3 Ohm, La=150mH, is fed from a circulating 3- phase dual converter with AC source line voltage of 160V, 50HZ. Determine converter firing angles for motoring operation at rated motor torque and speed of (-800) RPM.

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