Definition of electric drives and its components, types of loads, quadrant operation, variable loads, dynamics of motor load combination, selection of electric motors, speed control, starting, breaking, load cycle and motor rating, applications. DC series, shunt, separately excited, characteristics curves and speed control methods (by external resistance, armature voltage, field voltage and rectification circuits) chopper fed DC drives, first second and fourth quadrant drive. Induction motors: performance characteristics, classical drives (varying rotor resistance or supply voltage or supply voltage and frequency) and modern drives (introduction to slip power control, slip power recovery, stator voltage-current and frequency control). Pre-req.: POWE 334.