Q. In DC generator, how armature reaction is produced?

View solution

Q. In a DC generator, the effect of armature reaction on the main pole flux is to _________

View solution

Q. In a DC machine brushes are normally located along GNA.

View solution

Q. Armature reaction at 90° to the main field is called as ____________

View solution

Q. Increase in flux density at one end of the pole is less than the decrease at the other end. This is called as ____________

View solution

Q. Peak flux density in terms of total flux density is given by _________

View solution

Q. Flux density in the interpolar region drops down because of ______

View solution

Q. Which axis undergo shifting as a result of armature reaction?

View solution

Q. Armature reaction in a machine is demagnetizing due to _________

View solution

Q. Which of the following are effects of armature reaction?

View solution

Q. A 250 kW, 400 V, 6-pole dc generator has 720 lap wound conductors. Armature current is ____

View solution

Q. What is the total ampere conductors/pole (in SI) if 600 lap wound conductors carry 120 A current through conductors (P=4)?

View solution

Q. What is the total ampere turns/pole (in AT/pole) if 600 lap wound conductors carry 120 A current through conductors (P=4)?

View solution

Q. If total ampere turns per pole is equal to 6000 A-turns, peak ampere turns for a 4-pole machine is _____

View solution

Q. What is the total ampere turns per pole for 720 lap wounded conductors with carrying armature current equal to 625 A in a 6-pole machine?

View solution

Q. For 6252 AT/Poles, if brush shift is of 2.50 mech. Degrees, what will be the demagnetizing ampere-turns per pole for a 6-pole DC machine?

View solution

Q. For 6252 AT/Poles, if brush shift is of 2.50 mech. Degrees, what will be the cross-magnetizing ampere-turns per pole for a 6-pole DC machine?

View solution

Q. The armature reaction in a DC machine causes distortion in the main field flux. Effect of armature reaction can be reduced by_________

View solution

Q. In order to neutralize armature mmf perfectly under the pole shoe, the ampere-conductors of compensating winding must be (pole arc/pole pitch=1) _______

View solution

Q. What is the ampere turns per pole for compensating winding in DC machines?

View solution