7) The flux per pole of a four-pole generator is 0.05 wb. It driven at a speed of 1500 rpm. In order to have an induced emf of 20 v per conductor, , if the winding is lap-connected, find (a) the number of conductors in series in each parallel path, (b) the number of conductors between brushes to generate 240 v, and (c) the total number of conductors in the armature.

7) The flux per pole of a four-pole generator is 0.05 wb. It driven at a speed of 1500 rpm. In order to have an induced emf of 20 v per conductor, , if the winding is lap-connected, find (a) the number of conductors in series in each parallel path, (b) the number of conductors between brushes to generate 240 v, and (c) the total number of conductors in the armature.

Power System Analysis and Design (MindTap Course List)

6th Edition

ISBN:9781305632134

Author:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Publisher:J. Duncan Glover, Thomas Overbye, Mulukutla S. Sarma

Chapter6: Power Flows

Section: Chapter Questions

Problem 6.45P

See similar textbooks

Similar questions

A lap wound dc generator having 50slots with 15conductors per slot generated at no led emf of 400v when running at 1000 rpm suppose if the same generator is desired to genate 220v on open circuit. Suggest the speed at which it has to be rotated
Show that an alternator running in parallel on constant-voltage and frequency bus-bars has a natural time period of oscillation. Deduce a formula for the time of one complete oscillation and calculate its value for a 5000-kVA, 3-phase, 10,000-V machine running at 1500 r.p.m. on constant 50-Hz bus-bars. The moment of inertia of the whole moving system is 14,112 kg-m2 and the steady short-circuit is five times the normal full-load value. ANSWER IS [1.33 second]
Q2: A500 kW, 500 V, 10 poles d.c generator has lap wound armature Find the electrical angle shift of brushes when AT4 / pole = 208 AT. If the ATC for same generator when connected as wave wound is 2600 AT when the brushes on G.N.A.
111/ The armature reaction of the DC generator reduces the generated EMF. Select one: True False
A 220 V , 60 Hz , supply is connected to 200 – turn armature winding of reluctance 1.7x105 At / Wb . Find the magnetizing reactance , the rms values of the ( magneto – motive force , exciting and armature currents , magnetic flux ) , and the inductance Draw the phasor diagram of the circuit .
A 4-pole lap winding generator with 16 slot, 42 conductor per slot, 480v runs at 1800rpm. Find the flux produced per pole
The synchronous reactance of the direct-axis and quadrature-axis of a three-phase,40-pole, 50 Hz, 13,8 kV, salient-pole synchronous generator is 2,38 Ω and 1,33 Ωrespectively. The resistance of the star-connected stator is negligible. The load angle ofthe machine is 30°e and the excitation is set to induce an emf of 167%. Sketch the phasordiagram and calculate:(a) current(b) power(c) reluctance torque(d) the maximum load angle(e) the maximum power developed
A long shunt compound dc generator delivers a load current of 69 A at 396 V and has armature, series field and shunt field resistances of 0.096 Ω, 0.014 Ω, and 259 Ω, respectively. Calculate the armature current in ampere.
A long shunt generator delivers 25kW at 220V. The shunt, series and armature resistances are 50ohms, 0.02ohms, and 0.05ohms respectively, calculate the generated emf.
Write a technical manual of that will inform others of the efficiency and inefficiency of all types of motor and generator (ac and dc). Explore how any apparent inefficiencies could be improved. Show examples of these machines and using suitable examples, point out the areas of inefficiency (if applicable) and where and how things can be improved. Then provide the solution to the following as an example in your report. A 2-pole, single-phase alternator driven at 3000rpm require a mechanical input to its rotor of 30kW when it is delivering its full-load output of 30kW. Under this condition the fixed and variable losses are1100W and 2.8kW respectively, and the rotor field winding is supplied from a 110V dc source. Given that the full-load efficiency is 87%, determine. i) the frequency generated, ii) the input driving torque on full-load and iii) the rotor field current
Armature windings in ac generators are same as those used in DC machines Select one: True False
A short shunt compound generator supplies a load of 10 kW at 200 V through a pair of feeder and series field resistance 0.10 ohm. Armature resistance, shunt field resistance and series field resistance are 0.01 ohm, 52.2 ohms and 0.10 ohm, respectively. If the core friction and windage losses amount to 631 watts, the BHP of the driving engine is nearest to