A short shunt compound generator supplies a load current of 100 A at 250 V. The generator has the following winding resistances: Shunt field = 130 Q, Armature 0.1 Q and series field = 0.1 Q Determine the Emf generated if the brush drop is 1 V per brush.
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- In DC generators, lap winding is suitable for ) high voltage, high current O low voltage, high current O high voltage, low current O ) low voltage, low curren OUntitled Section Jalis 6 In d.c. generators armature reaction is produced by field current O armature current commutating winding current none of the mentioned compensating winding current *.The use of d.c. generators eliminated the use of rectifiers and ac supplies True False O(a) Show the voltage waveforms across each half of the secondary winding and across RL when a 100 V peak sine wave is applied to the primary winding in Figure. (b) what is Vavg and fout if fin = 50 Hz?
- 10. A potential difference of 250 V is applied to a field winding at 15-C and the current is 5 A. What will be the temperature of the winding when current has fallen to 3.91 A applied voltage being constant. Assume temperature coefficient at 15'C is equal to 1/254.5 per °CArmature winding of an alternator can also be described asIn DC generators brushes are used for O Collecting Current O Collecting eddy current loss O reduce eddy current loss O convert ac armaturê current in to dc
- The DC shunt generator with the terminal voltage 325 V, armature drop 9 V and the each brush drop 4 V, then the value of generated emf is nQ9 / What are the function of brushes , pole and commutator in DC machineFhe number of parallel paths and the number of series conductrs required for a given kW reting are determined by. System voltage Armature resistance Type of winding Field current
- A field excitation of 20 A in a certain alternator results in an armature current of 400 A in short circuit and a terminal voltage of 2000 V on open circuit. The magnitude of the internal voltage drop within the machine at a load current of 200 A isIn DC machines the number of parallel paths for a wave winding generator is Select one: O a. Three O b. Two OC. Half the number of poles O d. Equal to Number of Polesamature windings commonly used in DC machines a DC shunt generator are wound with a large numbe C generator can be used for battery charging?