Syllabus

Fundamental concepts of drives (8 classes)
Factors affecting selection of drives, speed-torque characteristics of motors and loads, condition of steady-state stability, transient stability: equal area criterion, dynamics of motor load combination, DC shunt motor and series motor braking methods and speed-torque characteristics in four quadrants, Induction motor: steady-state performance analysis, braking methods, four quadrant speed-torque characteristics, dc and ac dynamic braking, Methods of starting, energy relations during starting and braking, Transients in dc and ac drives

DC drives (9 classes)
Motor and converter performance parameters, 1-phase full- and semi- converter fed dc shunt and dc series motor, Mathematical analysis of 1-phase converter fed dc motors, 1-phase Dual converter: waveforms, operations with and without circulating current, 3-phase full converter, semi converter and dual converter fed dc drives, Power factor considerations of semi- and full converters, Power factor improvement of phase controlled converters, Sequence control of converters, Chopper controlled dc drives, closed loop controlled dc drives

Induction motor drives (10 classes)
Static speed control of induction motor: stator voltage control, Static control of rotor resistance, Static slip power recovery scheme, VSI fed drives, V/f control, constant torque and constant power operations, closed loop V/f control, CSI fed drives, Induction motor behavior with non-sinusoidal supply and unbalanced supply, PWM inverters and reduction of harmonics

Synchronous motor drives (6 classes)
Synchronous motor drives: Steady-state performance analysis, braking methods, VSI fed synchronous motor drives, V/f control, true synchronous mode, self synchronous mode, Brushless dc motor drive, PMSM drives

Traction drives (3 classes)
Electric traction services, nature of traction load, main line and sub-urban train configuration, traction mechanics, traction drives, braking, power factor and harmonics, traction motor.

To acquire the knowledge of Electric Drives

To apply the knowledge of Power Electronics to control the Electrical Machines

To understand the drives in industry

To understand the drives in traction

At the end of the course, students will be able to understand steady-state and transient behaviors of drives

At the end of the course, students will be able to apply power electronics to dc drives control

At the end of the course, students will be able to use power electronics in induction motor drives control

At the end of the course, students will be able to develop closed loop controlled induction motor drives

At the end of the course, students will be able to apply power electronics to synchronous motor drives control

At the end of the course, students will be able to know the traction drives

G. K. Dubey, Fundamentals of Electrical Drives, Narosa Publishing House, New Delhi , 2001

N. K. De and P. K. Sen, Electric Drives, PHI Learning Pvt. Ltd., New Delhi , 1999

S. K. Pillai, A First Course in Electrical Drives, New Age International, New Delhi , 1994

V. Subrahmanyam, Electric Drives: Concepts and Applications, New Age International, New Delhi , 2005