A DC generator has eight poles, wound as lap then rewound as a wave, calculate the electrical motive force generated in each case if you know that the number of conductors in the armature slots is 240. The magnetic flux of each pole 0.04 Wb. It runs at 1200 rpm

A DC generator has eight poles, wound as lap then rewound as a wave, calculate the electrical motive force generated in each case if you know that the number of conductors in the armature slots is 240. The magnetic flux of each pole 0.04 Wb. It runs at 1200 rpm

Electric Motor Control

10th Edition

ISBN:9781133702818

Author:Herman

Publisher:Herman

Chapter32: Two-speed, One-winding (consequent Pole) Motor Controllers

Section: Chapter Questions

Problem 1SQ

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A DC generator has eight poles, wound as lap then rewound as a wave, calculate the electrical motive force
generated in each case if you know that the number of conductors in the armature slots is 240. The magnetic
flux of each pole 0.04 Wb. It runs at 1200 rpm

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A DC generator has eight poles, wound as lap then rewound as a wave, calculate the electrical motive force generated in each case if you know that the number of conductors in the armature slots is 240 . The magnetic flux of each pole 0.04 Wb. It runs at 1200 rpm
A 4 pole generator with wave wound armature has 51 slots each having 24 conductors. The flux per pole is 0.01Wb. At what speed must the armature rotate to give an induced EMF of 220V. What will be the voltage developed if the winding is lap connected and the armature rotates at the same speed.
The field coils of a six-poles D. C. generator each having 600 turns, are connected in series. On the excitation of the field, there is a magnetic flux of 0.024 wb/pole. if the field circuit is opened in 0.24 second and residual magnetism is 0.0024 wb/pole, calculate the average voltage which is induced across field terminals.
a 6-pole DC generator has a simplex lap-wound armature containing 288 coils of 10 turns each. The resistance of each turn is 0.01 Ω. The flux per pole is 0.006 Wb.
A four pole machines generates 250V when operated at 1500 rpm. If the flux per pole is 1.85 x 106 maxwell, the number of armature slots is 45 and the armature winding has two parallel paths. If the speed of the generator is reduced to 1350 rpm, what would be the generated voltage. To what value of flux per pole should the excitation be adjusted if the generated voltage is to remain the same at 250V
A 6 pole generator with wave wound armature has 50 slots each having 24 conductors. The flux per pole is 0.01 Wb. (ii) What will be the voltage developed, if the winding is lap connected and the armature rotates at the same speed is
A wave wound armature of an eight-pole generator has 06 slots. Each slot contains 16 conductors. The voltage required to be generated is 300 V. What would be the speed of coupled prime mover if flux per pole is 0.05 Wb.If the armature is rewound as duplex lap wound machine and run by same prime mover, what will be the generated voltage.
(a) A 2 pole generator with wave wound armature has 75 slots each having 10 conductors. The flux per pole is 34 mWb. At what speed must the armature rotate to give an induced EMF of 205V. (b) What will be the voltage developed, if the winding is lap connected and the armature rotates at the same speed
A 4-pole d.c. shunt generator has 36 slots with 10 conductors in each slot. The flux is 0.03 wb and the speed is 750 rpm. Calculate the e.m.f. generated if the armature is (a) lap wound and (b) wave wound.
The following questions refer to to a 6-pole DC generator has a simplex lap-wound armature containing 288 coils of 10 turns each. The resistance of each turn is 0.01 Ω. The flux per pole is 0.006 Wb.
the armature of a 4 pole dc generator is required to generate an emf of 520V on open circuit when revolving at a speed of 660 rpm. Calculate the magnetic flux per pole if the armature has 144 slots with two coil side per slot, each consisting of three turns, the armature is wave wound.
An 8-pole lap-connected armature has 40 slots with 12 conductors per slot generating a voltage of 500 V. Determine the speed at which it is running if the flux per pole is 50mWb. ans.1250