Elements of Electrical Design - [2150904]


Teaching Scheme

Tutorial Practical Total
2 0 2 4

Examination Scheme

Theory Examination Practical Examination Total
ESE (E) PA (M) ESE Viva (V) PA (I)
70 30 30 20 150

    ESE = End Semester Examination, PA = Progressive Assessment

Course Type   

Syllabus Content

Basic principles of magnetic circuits – use of B-H curves in magnetic circuit; Calculations of MMF for air gap and teeth; Real and apparent flux density; Field Form; Air gap flux distribution factor (field form factor); Magnetising current calculation; Leakage Reactance calculation for various types of slots, Iron loss calculation concepts; Insulating Materials & Classifications
Introduction and review of A.C. and D.C. starters; Schematic diagrams of control circuit and power circuit for starters with contactors and timers. Design of starters and Field regulators.
Design of Small single-phase transformers; Design of variable air gap single phase and three phase choke coil; Design of ballast
Simplex & Duplex windings; Lap & Wave windings; Applications; Basic terms related to armature windings; Dummy Coils; Equalizer connections; Split coils.
Introduction; No. of phases; Phase spread; Concentric winding, Hemitropic winding; Whole coil winding; Mush winding; Double layer windings; Integral slot lap and wave winding; Fractional slot lap and wave windings; Performance analysis of various windings.
Preparation of schematic diagrams and estimation of cost of wiring for Tenaments, Row houses, Bungalows, Flats, Multi – Storied Buildings, Commercial Complexes like Offices, Hospitals, Hotels, Theatres
Types of load, Electrical Supply Systems, Wiring systems, Load Assessment, Permissible voltage drops & Conductor size calculations, Design of Control panel. Estimation and costing for service connections.

Reference Books

SrTitleAuthorPublicationAmazon Link
1A course in electrical machine DesignA. K. Sawhney    
2Electrical Machine DesignR. K. Agrawal    
3Design of Electrical MachineV. N. Mittle    

Course Outcome

After learning the course the students should be able to: -

  • Explain the basic concepts related to design of electrical equipments
  • Design the starters, field regulators, small transformers and choke coils
  • Draw and explain the winding diagrams for AC and DC machines
  • Estimate the cost of wirings.