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What is the usual value of the permeance coefficient of the PMDC motor?

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in Design of Electrical Machines by (687k points)
What is the usual value of the permeance coefficient of the PMDC motor?

(a) 4

(b) 5

(c) 6

(d) 7

I have been asked this question in an online quiz.

My query is from Design Preliminaries in portion Design of Permanent Magnet (PM) DC Motors of Design of Electrical Machines

1 Answer

+1 vote
by (1.4m points)
Right choice is (c) 6

The best I can explain: The range of the permeance coefficient for the PMDC motor is 4-8. The value is usually around 6 for most of the applications.

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