Course Details

Subject {L-T-P / C} : EE6402 : Advanced Machine Drives {3-0-0 / 3}
Subject Nature : Theory
Coordinator : Prof. Kanungo Barada Mohanty


Induction motor drive: Three phase induction motor operation from nonsinusoidal supply, speed control methods: voltage control at constant frequency, AC voltage controller fed three phase induction motor, analysis of single phase AC voltage controller with load, speed control of wound rotor induction motors: static rotor resistance control and slip power control, static Scherbius drive and Kramer drive, variable frequency operation from voltage sources and current sources, constant V/f control.
Vector control of induction machine: Reference frame theory and transformations, induction motor model in stationary and synchronously rotating d-q reference frames, principle of vector control, direct and indirect vector control, rotor flux and stator flux orientation control, implementation of direct and indirect vector control schemes, effects of machine parameter variation on the performance of vector controlled drives, methods of flux estimation, current controlled PWM VSI with hysteresis band, synchronous frame P-I current control, stator flux orientation control, speed sensorless vector control: speed estimation through slip calculation, direct synthesis from state equations, speed adaptive flux observer, extended Kalman filter, model reference adaptive system.
Direct Torque Control of induction motor, DTC with space vector PWM, dwell time calculation.
Synchronous motor drive: Review of cylindrical rotor and salient pole synchronous machine: operating principles, characteristic equations, phasor diagram, true and self-synchronous control, Brushless DC motor, load commutated inverter fed synchronous motor, constant V/f control, scalar control with unity power factor, dynamic d-q axis model.
Vector control of synchronous motor: principle, phasor diagram and scheme of control.
Permanent magnet synchronous motor: surface permanent magnet machine and interior permanent magnet motors, synchronous reluctance motor.
Switched reluctance machine, speed control scheme for SRM drive.

Course Objectives

  1. To understand and apply scalar and vector control techniques on induction motor drives
  2. To apply estimation techniques and develop sensorless vector controlled drives
  3. To apply direct torque control technique on induction motor drives
  4. To develop unity power factor drives and fast response vector controlled synchronous motor drives

Course Outcomes

CO1: Skill in developing high performance, scalar and vector controlled induction motor drives
CO2: Competency in estimation and sensorless vector control of induction motor drives
CO3: Ability to develop direct torque controlled induction motor drive
CO4: Competency in developing unity power factor drives and fast response, vector controlled synchronous motor drives..

Essential Reading

  1. B. K. Bose, Modern Power Electronics and AC Drives, PHI , 2002
  2. G. K. Dubey, Power Semiconductor Controlled Drives, Prentice-Hall International, New Jersey , 1989

Supplementary Reading

  1. W. Leonhard, Control of Electrical drives, Springer-Verlag , 1985
  2. G. K. Dubey, Fundamentals of Electrical Drives, Narosa Publishing House , 2002