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Which winding contains wire with higher thickness?

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+1 vote
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in DC Machines by (506k points)
Which winding contains wire with higher thickness?

(a) Shunt field

(b) Series field

(c) Both have same number of turns

(d) Depends on requirement

The question was asked during an online interview.

I'd like to ask this question from Methods of Excitation topic in portion Commutation Process & Excitation Methods of DC Machines

1 Answer

+2 votes
by (1.2m points)
Right choice is (b) Series field

The explanation: Series field winding is used when wire is thick. Thus, by making minimum number of turns it can be used to excite a DC machine. For a given field current, control of this field is achieved by means of a diverter, a low resistance connected in parallel to series winding.

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