What is the relation of the copper loss and brush contacts with the total loss in universal commutator motors?
(a) copper loss and brush contacts = total loss
(b) copper loss and brush contacts = total loss/2
(c) copper loss and brush contacts = total loss * 2
(d) copper loss and brush contacts = total loss * 3
The question was asked in an internship interview.
Enquiry is from Design of Small Universal Commutator Motors topic in division Design of Small Electrical Machines, Starters and Field Regulators of Design of Electrical Machines