Question

How is the number of armature slots associated with the hotspot temperature?

(a) small number of slots leads to less hotspot temperature

(b) small number of slots leads to high hotspot temperature

(c) large number of slots leads to high hotspot temperature

(d) large number of slots leads to low hotspot temperature

I had been asked this question in an interview for internship.

I want to ask this question from Armature Design topic in section Design of Synchronous Machines of Design of Electrical Machines

Answer 1

Correct answer is (b) small number of slots leads to high hotspot temperature

The explanation is: The small number of slots leads to an increase in hotspot temperature. The small number of slots results in bunching of conductors leaving small space for circulation of air.