A. increase
B. decrease
C. either of the above
D. none of the above
Answer: Option A
This Question Belongs to Electrical Engineering >> Electrical Machine Design
D.C. machines designed with a large value of air gap length have
A. worst, ventilation
B. poor ventilation
C. better ventilation
D. none of the above
_________ electromagnets generally function as holding magnets.
A. Tractive
B. Portative
C. Either of the above
D. None of the above
By which of the following methods motor rating for variable load drives can be determined ?
A. Method of average losses
B. Equivalent current method
C. Equivalent torque method
D. Equivalent power method
E. All of the above
In direct cooled system using hydrogen both stator and rotor conductors are made
A. solid
B. hollow
C. perforated
D. any ofthe above
because of a reduction in the length of end-turn windings (overhang) and a decrease in the required magnetic flux per pole, which leads to smaller field coils. As the number of poles (
) increases, the pole pitch (
) decreases, reducing the inactive copper length required to connect armature co
Any one can explain..???