Electrical Machines - I (IITKGP)

Transformer and D.C rotating machine will be the main topics to be discussed in this course. Working principle of ideal transformer and its equivalent circuit referred to two sides. Analysis of practical transformer & its equivalent circuit. Equivalent circuit referred to different sides and phasor diagram. Core loss and copper loss. Regulation & efficiency. Three phase transformer connection & vector group. Parallel operation of transformers. Autotransformer. Basic constructional features of D.C machine. Elementary lap and wave winding used in armature. Emf and torque equations of D.C. machine – generator and motor mode. Armature reaction and its effect. Compensationg winding. Shunt, series and compound machines. Generator characteristics. Motor characteristics. Efficiency, Basic tests. INTENDED AUDIENCE: UG Electrical Engineering as core subject. UG Mechanical and Mining Engineering as Elective subject. PREREQUISITES: Basic Electrical Technology: Knowledge of elementary calculus INDUSTRY SUPPORT: BHEL, CESC, NTPC, WBPDCL