OBJECTIVE: The student will be able to design the main dimensions and other major parts of transformer and d.c. and a.c. rotating machines.
General concepts in the design of rotating machines - Output equation - Magnetic and electric loadings - Common design features of all rotating machines - Conducting, insulating and magnetic materials used in electrical apparatus - mmf calculation for the magnetic circuit of rotating machines - Leakage reactance calculation. CAD tools for electrical machine design.
Armature winding - Output equation - Choice of specific loadings - Choice of poles - design of conductors, winding, slot, air gap, field poles and field coils, commutator and brush - Predetermination of efficiency, temperature rise and open circuit characteristics from design data (qualitative treatment only)
Output equation - Design of core and coils for single phase and three phase transformers - Design of tank and cooling tubes - Predetermination of circuit parameters, magnetising current, losses, efficiency, temperature rise and regulation from design data (Qualitative treatment only)
Output equation - Choice of specific loadings - Design of stator - Design of squirrel cage and slip ring rotors - Stator and rotor winding designs - Predetermination of circuit parameters, magnetising current, efficiency and temperature rise from design data (Qualitative treatment only).
Constructional features - SCR - Output equation - specific loadings - Main dimensions - Stator design - Design of salient pole field coil.
