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PMDC motors are _________________

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in DC Machines by (506k points)
PMDC motors are _________________

(a) Smaller than corresponding rated field wound motor

(b) Larger than corresponding rated field wound motor

(c) Almost same size that of corresponding rated field wound motor

(d) Can be smaller or greater than corresponding rated field wound motor

This question was posed to me in a national level competition.

I would like to ask this question from PMDC Motors in portion DC Machines of DC Machines

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The correct option is (a) Smaller than corresponding rated field wound motor

Easiest explanation: PMDC motors are always of smaller size compare to field wound motors of same rating. Here, field winding is replaced by small block of magnet so that power output remains same. PMDC motors are costly compare to DC motor of same rating.

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