How many type of excitations does the universal commutator motors have?
(a) 1
(b) 2
(c) 3
(d) 4
This question was posed to me by my college director while I was bunking the class.
This key question is from Design of Small Universal Commutator Motors topic in portion Design of Small Electrical Machines, Starters and Field Regulators of Design of Electrical Machines