Course Details

Subject {L-T-P / C} : EE6405 : Control of Electric Drives {3-0-0 / 3}
Subject Nature : Theory
Coordinator : Prof. Kanungo Barada Mohanty


Factors affecting selection of drives, characteristics of motors, types of load, torque balance, motor and load dynamics, steady state and transient stability, equal area criterion, thermal consideration in motors, choice of motors and rating based on heating starting, braking and speed control characteristics of motors, transients in drives, starting and braking time.
DC drives: Performance parameters, single phase and three phase- semi converter and full converter fed separately excited DC motor and series DC motor, armature control and field control, motoring and braking operations, different modes of operation, waveforms for continuous and discontinuous current operation, expression of armature current one-, two- and four quadrant drives, dual converter: operation with and without circulating current, power factor and THD considerations of converters, power factor improvement of phase controlled converters one-, two- and four quadrant choppers, chopper controlled dc drives: analysis for continuous and discontinuous current.
Closed loop control of DC drives, transfer function and state space modeling, inner and outer current control, current limit control, design of controllers, series DC motor modeling, PLL based control, state feedback control, pole placement design, sliding mode control, Fuzzy control and other recent control techniques for industrial drives.

Course Objectives

  1. To learn the fundamental concepts of electric drives and to select motor of appropriate rating
  2. To learn power electronic control of DC drives and to select appropriate converter
  3. To design and develop closed loop controlled DC drives
  4. To apply sliding mode control, Fuzzy control and other recent control techniques to drives.

Course Outcomes

CO1: Ability to select appropriate drive with correct rating of motor
CO2: Ability to select appropriate power electronic converter for DC drives
CO3: Ability to design closed loop controlled DC drives
CO4: Ability to investigate on recent control technique application to drives

Essential Reading

  1. G. K. Dubey, Fundamentals of Electrical Drives, Narosa, New Delhi , 2002
  2. S. K. Pillai, A First Course in Electrical Drives, New Age International, New Delhi , 1994

Supplementary Reading

  1. P. C. Sen, Thyristor DC Drives, , 2017
  2. N. K. De and P. K. Sen, Electric Drives, PHI, New Delhi , 1999