If the prime mover torque suddenly falls by a considerable amount, the damperwinding of the alternator witnesses the flow of a massive current through it, which further opposes the prime mover torque.True or False
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- If the prime mover torque suddenly falls by a considerable amount, the damperwinding of the alternator witnesses the flow of a massive current through it, which further opposes the prime mover torque.True or FalseWe know there are few conditions for alternator synchronization. How many conditions are there? Write all the conditions.There are 72 slots in a 3-phase, 8-pole, 50 Hz, star connected alternator. There are 2 conductors in each slot and all the conductors in a phase are connected in series. Coil span is 150° electrical and the flux per pole is 0.05 Weber sinusoidally distributed. Calculate the emf induced per phase.
- The maximum speed of an alternator working at 60 Hz is possible when the number of poles of the machine is **.***LEE a. 2 b.4 C. 5 d. 3 The cerrecttanswer is 2The maximum amount of voltage is induced time(s) in 3600 of mechanical rotation for a single loop coil rotating between a north and south magnetic poles of a DC generator. a) one b) two c) four d) none of the aboveThere are 144 slots in a 3-phase, 16-pole, 50 Hz., star connected alternator. There are 4 conductors in each slot and all the conductors in a phase are connected in series. Coil span is 1500 electrical and the flux per pole is 0.05 Weber sinusoidallly distributed. Calculate the emf induced per phase.
- A 3-phase 4-pole alternator has a single layer full-pitch winding with 8 conductors per slot. The armature has a total of 36 slots. Determine the voltage between lines when the alternator is driven at 1800 rpm with a flux of 0.05 Wb per pole.A 6 pole DC wave wound generator has 28 armature conductors with flux per pole is 23 mWb and the e.m.f generated is 64 V, then the speed of the machine is O 99.38 rps O 0.63 rps O 33.13 rps O 6.34 rps The thermocouples are suitable for temperature measurement applications in the range of 200°C to over 2000°C. Select one: O True O FalseA 4 pole dc generator with duplex wave winding has 48 slots and four elements per slot. The flux perpole is 2.5 x 10 Maxwells and the speed of the prime mover is 30 rpm. What is the average generatedarmature voltage? Neglecting brush drop.
- A three phase 4 pole star connected alternator has 120 slots on the armature. Each slot contains 8 conductors. It is driven at 350 rpm. The line value of emf available across the terminals is 2.6kV. Find the frequency of induced emf and flux per pole. Frequency of Induced EMF = Number of turns = Flux per poleCalculate the phase voltages of a three phase star connected 4 pole small alternator having a total flux per pole 0.30 Wb. Each phase has a concentrated winding of 10 full pitched turns and the relative velocity between armature winding and field flux is 1500 rpm.A 20-pole, three-phase, star-connected alternator rotates at 300 rpm. The armature has 360 slots and 6 leads per slot. The width of the coils is 5/6 from the polar pass. If the maximum flux per pole, with sinusoidal distribution, is 0.086 Wb, what will be the values of the f.e.m.s. phase and line