Electric Drives & Traction Syllabus
Instruction : 4 periods per week
University examination : 3 hours
University examination marks : 70
Sessional marks : 30
Credits : 4
Electric drive: concept and classification of electric drives, four quadrant operation, Types of loads, dynamics of motor load combination, steady-state and transient stability Of drive.
Characteristics of motors: basic relations and characteristics and modified speed torque characteristics of d.C shunt and series motors, characteristics of 3- phase induction And synchronous motors and modification of their speed – torque characteristics
Starting: effect of starting on power supply, motor and load, methods of starting, Acceleration time, energy relations during starting, and methods to reduce energy loss During starting.
Electric braking: types of braking, braking of d.C motors during lowering of loads, Braking while stopping, braking of induction and synchronous motors, energy relations During braking.
Rating and heating of motors: heating effects, loading conditions and classes of duty, Determination of power ratings of motors for different applications, effect of load Inertia, load equalization and fly-whee, calculations, environmental factors.General factory drive, paper mill drive, steel mill drive, coal mining drive.
Electrical traction: general features and systems of trac electrification, traction Motors, loco wheel arrangement and riding qualities, transmission of drive, traction Motor control (series-parallel control), trac equipment and collection gear, train Movement, speed-time curve and speed distance curve, specific energy consumption (sec) and Factors affecting it.
1. “ a first course on electric drives “ by s. K. Pillai, wiley esastren ltd.
2. “ utilisation of electrical energy “ ( s.I. Units) by e. Open shaw taylor and v.V.L. Rao
1. “ modern electric traction “ by h. Partab. Dhanpat roy & co.
2. “ electric drives” by vedam subramanyam, tmh pub.