204183: Electrical Circuits

Credit 03

Unit I Basic Circuit analysis & Simplification Techniques
Kirchhoff‟s Current and Voltage Laws, Independent and Dependent sources and their interconnection,
power calculations.
Network Analysis: Mesh, Super mesh, Node and Super Node analysis. Source transformation and source
shifting.
Network Theorems: Superposition, Thevenin‟s, Norton‟s and Maximum Power Transfer. (Analysis of
simple DC circuits using all above techniques & Analysis of simple AC circuits using only Mesh analysis)
Mapping of Course Outcomes for Unit I CO1: Analyze the simple DC and AC circuit with circuit simplification techniques.

Unit II Transient Analysis of Basic RL, RC and RLC Circuits
Initial conditions, Driven RL and RC circuits, source free RL and RC circuits, properties of exponential
response, Natural and Forced response of RL and RC circuits. Introduction to driven & Source free series
RLC circuit. Over damped and Under damped series RLC circuit.
Mapping of Course Outcomes for Unit II CO2: Formulate and analyze driven and source free RL and RC circuits.

Unit III Two Port Network Parameters and Functions
Terminal characteristics of network, Z, Y, h, ABCD Parameters; Reciprocity and Symmetry conditions,
Applications of the parameters.
Application of Laplace Transforms to circuit analysis, network functions for one port and two port
networks, poles and zeros of network functions and network stability.
Mapping of Course Outcomes for Unit III CO3: Formulate & determine network parameters for given network and analyze the given network using Laplace Transform to find the network transfer function.

Unit IV DC Machines
Construction, working principle, derivation of emf equation, types, voltage equation of DC generator.
Working principle, derivation of Torque equation, types, voltage equation & speed equation of DC Motor.
Basic characteristics & different methods of speed control of DC Shunt and Series motor, Power flow
diagram of DC motor, Numericals on speed & torque.
Need of starter, three point & four point starters for DC shunt motor, applications of DC Motors.
Permanent Magnet DC motors (PMDC): Construction, Working and applications.
Mapping of Course Outcomes for Unit IV CO4: Explain construction, working and applications of DC Machines / Single Phase & Three Phase AC Motors.
CO6: Analyze and select a suitable motor for different applications.

Unit V AC Motors (Single phase & Three phase)
Three phase Induction motors: Construction, working principle, types, concept of slip, effect of slip on
rotor parameters, derivation of torque equation, condition for maximum torque, torque ratios, Torque-slip
characteristics, Power flow diagram with numerical.
Single phase Induction motor: Construction, working principle, types and applications
Necessity of starters: Study of DOL & Star-Delta starters, speed control using V/f method, Applications.
Mapping of Course Outcomes for Unit V CO4: Explain construction, working and applications of DC Machines / Single Phase & Three Phase AC Motors.
CO6: Analyze and select a suitable motor for different applications.

Unit VI Special Purpose Motors
BLDC Motor: Types, Construction, working principle, Bipolar control circuit, torque-speed
characteristics and applications.
Stepper Motor: Types, Construction, working principle, different modes of operation, control circuit,
applications.
Introduction to Electric vehicle, block diagram, case study of any one electric vehicle with respect to
specifications of motor, battery and controller.
Mapping of Course
Outcomes for Unit VI CO5: Explain construction, working and applications of special purpose motors & understand motors used in electrical vehicles.
CO6: Analyze and select a suitable motor for different applications.

Learning Resources

Text Books:
1. Ravish R Singh, “Network Analysis & Synthesis”, McGraw-Hill Education.
2. B.L. Theraja, A.K. Theraja, “Electrical Technology”, Vol II, AC & DC Machines, S. Chand
Reference Books:
1. I.J Nagarath and D.P Kothari, “Electrical Machines”,Tata McGraw-Hill Publication 4th Edition.
2. William H. Hayt, Jack E. Kimmerly and Steven M. Durbin, “Electrical Circuit Analysis”, Tata
McGraw Hill publication, 7th Edition.
3. V K Mehta and Rohit Mehta, “Principles of Electrical Machines”, S Chand Publications.
4. A K Babu, “Electric & Hybrid Vehicle”, Khanna Publishing.