A 25 kVA, 220V, 3φ alternator delivers rated kVA at a power factor of 0.84. The effective ac resistance between armature winding terminals is 0.18Ω. The field takes 9.3A at 115V. If friction and windage loss is 460W and the core loss is 610W, calculate the percent efficiency.

Q: A resultant air-gap flux of a 16-pole, 3-phase alternator is 0.16 wb/pole and is distributed…

A: Given:  3 ϕ,P=16,ϕ=0.16 Wb/pole,Slots=2 Slots/pole/phase,No. of layers=2,Coil span=150°. Required:…

Q: There are 144 slots in a 3-phase, 16-pole, 50 Hz., star connected alternator. There are 4 conductors…

A:

Q: A. 2.4 C. 4.28 D. 4.57 2. A 3-phase 4-pole alternator has a single layer full-pitch winding with 8…

A:

Q: 3. A 4-pole 3-phase 60HZ wye-connected alternator having 60 slots with 2 conductors per slot in 2…

A: Per phase emf = 4.44×frequency×flux per pole×turns per phase×winding factor. for star connection ,…

Q: v. With reference to an 50 Hz3 phase alternator explain how P,Q,V and F are controlled.

A: It is asked to explain the control of P (active power),Q (reactive power), V (voltage) and F…

Q: phase, 10 pole, Y-connected alternator runs at 600 rpm. It has 120 stator slots with 8 conductors…

A: In this question , we will find phase and line emf for star connected alternator..

Q: A 4-pole ac machine has a 3-phase winding wound in 60 slots. The coils are short pitched in such a…

A: The distribution factor (Kd) and coil span factor Kc combine to form the winding factor (Kc). The…

Q: Calculate the speed and open-circuit line and phase voltages of a 4-pole, 3-phase, 50Hz, star…

A: Calculate the speed and open-circuit line and phase voltages?  Given that 4-pole, 3-phase, 50Hz,…

Q: identical, 3-phase, Y-connected alternators A and B share equally a load of 10MW at 33kV at 0.8pf…

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Q: Calculate the voltage per phase for a 1500 rpm, 4 pole alternator having a double layer winding with…

A: It is given that:-