Basic Elements – Types of Electric Drives – factors influencing the choice of electrical drives – heating and cooling curves – Loading conditions and classes of duty – Selection of power rating for drive motors with regard to thermal overloading and load variation factors

Constructional details, principle of operation and performance characteristics of D.C. motors, single phase induction motor, three phase induction motor, synchronous motor, universal motor, servo motor, stepper motor and reluctance motor.

Speed control of D.C series and shunt motors- speed control of single and three phase induction motors –starting methods of D.C. motor and three phase induction motors –electrical braking –simple problems.

Power electronic devices, Controlled rectifiers and choppers, Speed control of DC series and shunt motors using controlled rectifiers and DC choppers – ward leonard method-applications.

Inverters and voltage regulators, Speed control of three phase induction motor – Voltage control, voltage / frequency control and slip power recovery scheme using inverters and AC voltage regulators – applications.