Question

The coil span should be 8.33 percent of pole pitch to obtain the maximum reduction of harmonics.

(a) true

(b) false

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

I need to ask this question from Armature Design in chapter Design of Synchronous Machines of Design of Electrical Machines

Answer 1

Right option is (a) true

Explanation: The coil span adjustment indirectly affects the harmonics reduction. The coil span should be minimum of about 8.33 percent of pole pitch to obtain the maximum reduction of harmonics.