A 500-V, wave-wound, 750 r.p.m. shunt generator supplies a load of 195 A. The armature has 720conductors and shunt field resistance is 100 2. Find the demagnetising amp-turns/pole if brushes are advancedthrough 3 commutator segments at this load. Also, calculate the extra shunt field turns required to neutralize(600, 4800, 120)4.this demagnetisation.

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Answered: 4. A 500-V, wave-wound, 750 r.p.m.…

Introductory Circuit Analysis (13th Edition)

13th Edition

ISBN:9780133923605

Author:Robert L. Boylestad

Publisher:Robert L. Boylestad

Chapter1: Introduction

Section: Chapter Questions

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Similar questions

A 6 pole, wave wound DC shunt generator has a useful total flux of 420 mWb. The armature winding consists of 220 turns each of 0.004 2 resistance, when running at 900 RPM the armature current is 50 A. If the armature winding reconnected as lap calculate the terminal voltage in case of wave and lap given that the field circuit and the speed are kept same.
1A. Which of the following is/are a method of providing field excitation for a DC generator. a) separately excited shunt b) self-excited series c) self-excited shunt d) all of the above 1B. Which type of field winding typically has the higher resistance? a) series b) shunt
An 145-pole d.c. shunt generator with wave wound armature having 455 conductors, has to supply a load of 120 lamps each of 145W at 230 v. The flux per pole is 14 mWb and Ra = 1.8 ohms, Rsh355ohms. What will be the %3D load current and e.m.f generated . Consider brush drop of 1v/brush. Load Current Generated EMF
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 .
Problem #1: A 6-pole, 3-phase, Y-connected, 60-Hz alternator has 12 slots per pole and 4 conductors per slot. The winding is 5/6 pitch. There are 0.025 Wb entering the armature from each north pole, and this flux is sinusoidally distributed along the air gap. The armature coils are all connected in series. Determine (a) pitch factor (b) distribution factor (c) induced emf per phase
i. Briefly describe the 5 major types of DC generators according to the manner in which their field flux is produced.
A 4 pole generator with wave wound armature has 58 slots each having 20 conductors. The flux per pole is 0.01 Wb. (i) At what speed must the armature rotate to give an induced EMF of 235V is, (ii) What will be the voltage developed, if the winding is lap connected and the armature rotates at the same speed is,
Choose True (V) or false( x) for the following : 4) Reluctance is a measure of "opposition" the magnetic circuit offers to the flux. 5) The rated output power (transformer rating) can be used to determine the turns ratio of the transformer. 6) With the increase in speed of a series DC motor, Both back emf as well as line current increase. 7) When an induction motor is stationary, the stator and rotor windings form the equivalent of a transformer. 8) Increasing the load current for DC Self-excited generator Shunt-Wound Generator will increase the terminal voltage. 9) In lap windings there are as many paths in parallel and used to produce high current, low voltage output. 10) In 3-pahse induction motor, if the rotor speed increases, the rate at which the rotating magnetic field cuts the rotor bars is increasing.
For a 4-pole dc armature with 28 slots and 8 coil-sides per slot, find the winding pitches and the commutator pitch for a wave winding. What is the distance between brushes in terms of commutator segments?
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