EC 2201 ELECTRICAL ENGINEERING Lecture Notes for ECE - Third (3rd) semester
EC2201 Lecture Notes
UNIT I D.C. MACHINES
Constructional details – emf equation – Methods of excitation – Self and separately
excited generators – Characteristics of series, shunt and compound generators –
Principle of operation of D.C. motor – Back emf and torque equation – Characteristics of
series, shunt and compound motors - Starting of D.C. motors – Types of starters -
Testing, brake test and Swinburne’s test – Speed control of D.C. shunt motors.
UNIT II TRANSFORMERS
Constructional details – Principle of operation – emf equation – Transformation ratio –
Transformer on no load – Parameters referred to HV/LV windings – Equivalent circuit –
Transformer on load – Regulation - Testing – Load test, open circuit and short circuit
UNIT III INDUCTION MOTORS
Construction – Types – Principle of operation of three-phase induction motors –
Equivalent circuit – Performance calculation – Starting and speed control – Single-phase
induction motors (only qualitative treatment).
UNIT IV SYNCHRONOUS AND SPECIAL MACHINES
Construction of synchronous machines-types – Induced emf – Voltage regulation; emf
and mmf methods – Brushless alternators – Reluctance motor – Hysteresis motor –
UNIT V TRANSMISSION AND DISTRIBUTION
Structure of electric power systems – Generation, transmission and distribution systems
- EHVAC and EHVDC transmission systems – Substation layout – Insulators – cables.