What type of excitation is used in the small universal commutator motors and what type of supply is provided?
(a) parallel excitation, dc supply
(b) series excitation, dc or ac supply
(c) series excitation, ac supply
(d) parallel excitation, dc supply
The question was posed to me in semester exam.
My enquiry is from Design of Small Universal Commutator Motors topic in chapter Design of Small Electrical Machines, Starters and Field Regulators of Design of Electrical Machines