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Example 3.2 In th last figure shows a cumulatively compound generator with a rheostat connected in...
Q3) A 20 kW compound generator works on full load with terminal voltage of 230 V. The armature, series and shunt field resistances are 0.1, 0.05 and 115 ohm respectively. Calculate: a) The generated e.m.f , if connected short shunt. b) The generated e.m.f, if connected long shunt. c) If the machine is connect short shunt, the iron and friction losses at rated power equal to 850 W. calculate the mechanical efficiency, electrical efficiency and commercial efficiency.
3. Each pole of a 100 kW, 250 V short-shunt flat-compound generator has a shunt field of 2000 turns and a series field of 7 turns. If the series-field resistance is 0.01 and total shuntfield resistance is 100 2. Calculate the mmf when the machine operates at (a) no-load and (b) full-load Circuit Calculation(s) ha armature is connecte A permanent magnet dc motor tumsa source. Calculate the armature voltage requin (b) 1600 rpm. Neglect armature resistance. Circuit agnet de motor...