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Electrical Machines EE256


Posted by: seminar class
Created at: Monday 28th of March 2011 03:58:17 AM
Last Edited Or Replied at :Monday 28th of March 2011 03:58:17 AM
questions and answers about dc machines ppt , question and answers on electrical machines ii, pole pitch related math in dc generator , electrical machines dc generators questions, diffenece self excited and separate , electrical machines question answer, diff bw pm excited and self excited generators , electrical machines 2 question with answers, write down the brushes of a dc machine , electrical machines question and answers in pdf, electrical machines 1 questions and answers download , answers ge question 20442, difference bw self excited seperately excited , free electrical machines question answer, lap winding and wave winding ppt ,

Emf induced E=ФZNP/60A
Ф=flux per pole in Weber
Z=total number of armature conductors
N=speed of armature in rpm
P=number of poles
A=number of parallel paths
9.what is pole pitch?
The periphery of the armature is divided for a number of poles of the generator. the center to center distance between two adjacent poles is called pole pitch
It is also equal to the number of armature slots or armature conductors per pole.
10.How can the voltage in a DC generator be increased?
Increasing the main field flux and the speed of the armature can i..................[:=> Show Contents <=:]



Electrical Machines EE256


Posted by: seminar class
Created at: Monday 28th of March 2011 03:58:17 AM
Last Edited Or Replied at :Monday 28th of March 2011 03:58:17 AM
questions and answers about dc machines ppt, question and answers on electrical machines ii , pole pitch related math in dc generator, electrical machines dc generators questions , diffenece self excited and separate, electrical machines question answer , diff bw pm excited and self excited generators, electrical machines 2 question with answers , write down the brushes of a dc machine, electrical machines question and answers in pdf , electrical machines 1 questions and answers download, answers ge question 20442 , difference bw self excited seperately excited, free electrical machines question answer , lap winding and wave winding ppt,
of poles. But in wave wound machine, the number of parallel paths is always two irrespective of number of poles.
4. Name the three things required for the generation of emf
o Presence of armature conductors
o Presence of magnetic field
o Relative motion between conductor and magnetic field
5. What are the different types of dc generator
6. What is meant by self excited and separately excited dc generator
• Self-excited generator are those whose field magnets are energized by the current produced by the generator themselves
• Separately excited generator a..................[:=> Show Contents <=:]



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