Question

What is the formula of the number of turns per coil?

(a) number of turns per coil = number of conductors/2*coils/slot*number of armature teeth

(b) number of turns per coil = number of conductors*2*coils/slot*number of armature teeth

(c) number of turns per coil = number of conductors*2*coils/slot/number of armature teeth

(d) number of turns per coil = number of conductors/2*coils/slot/number of armature teeth

The question was posed to me by my college director while I was bunking the class.

I need to ask this question from Design Steps and Considerations in portion Design of Permanent Magnet (PM) DC Motors of Design of Electrical Machines

Answer 1

Right answer is (a) number of turns per coil = number of conductors/2*coils/slot*number of armature teeth

Best explanation: The number of conductors is calculated along with the coils per slot is calculated. Next, the number of armature teeth is calculated, and on substitution gives the number of turns per coil.