A 25 MVA, 4-pole, 50 Hz turbo-alternator has an inertia constant H = 5 kW sec/kVA. The stored kinetic energy in the rotor at synchronous speed is
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- A small 4-pole generator with a six-turn rotor coil generates the following voltage wave: e = 169.706 sin(40t). Determine the (i) Maximum pole flux (in weber) and (ii) The frequency of the induced voltage (in Hz)Determine the value of the capacitor to raise the power factor to unity when two induction motor must be connected to a capacitor . The first motor is twenty-four kilo watts and power factor 0.8, while the other is forty kilo watts and power factor 0.95.Electrical Machines A 4-pole single-phase induction motor is rotating in a clockwise direction at a speed of 1000 rpm having a voltage of 100 V with a frequency of 50 Hz. At a standstill, if the rotor resistance is 1.70, then in the backward branch what will be the effective resistance?
- The rotor of a 4-pole ac generator is wound with a 200 turns coil. If the flux per pole is 5 mWb and the rotor runs at a speed of 1500 rpm, the rms value of the induced voltage for this AC generator is nearly?A 4-pole DC generator has 1,000 turns on its rotor. It is being turned by a prime mover at 4,000 RPM in a 500KLINE field. What voltage is it generating?A 6 pole DC wave wound generator has 22 armature conductors with flux per pole is 24 mWb and the e.m.f generated is 60 V, then the speed of the machine is O 0.51 rps O 113.64 rps O 37.88 rps O 5.09 rps
- Need asap. If the generated voltage of a separately excited generator is 100 v at 1200 rpm at what speed in the rpm machine must be adjusted so that the generated voltage becomes 125VA 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 FalseThere 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.