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What is the value of the no. of poles for obtaining a dispersion coefficient = 0.5?

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in Design of Electrical Machines by (687k points)
What is the value of the no. of poles for obtaining a dispersion coefficient = 0.5?

(a) 5

(b) 7

(c) 10

(d) 6

The question was posed to me at a job interview.

My doubt stems from Dispersion Coefficient topic in chapter Three Phase Induction Motor of Design of Electrical Machines

1 Answer

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Best answer
Right answer is (d) 6

The explanation is: The machines with 6 poles can result in a dispersion coefficient of 0.5. The dispersion coefficient of 0.5 can be obtained for 2 pole and 4 pole machines also.

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