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 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 °C
- Armature winding of an alternator can also be described asUntitled 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 OIn 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?