Question: A 2 2 0 V , 1 5 0 0 rpm , 1 0 A separately excited dc motor is fed from a single -

A 220 V,1500 rpm,10 A separately excited dc motor is fed from a single-phase fully-controlled rectifier with an ac source voltage of 230 V,50 Hz.=2. Conduction can be assumed to be continuous. Calculate firing angles for
(a) Half the rated motor torque and 500 rpm.
(b) Rated motor torque and (-1000) rpm.

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