Electric Machines & Drives

Course Learning Objectives


  • Describe the structure of Electric Drive systems and their role in various applications such as flexible production systems, energy conservation, renewable energy, transportation etc., making Electric Drives an enabling technology.
  • Understand basic requirements placed by mechanical systems on electric drives.
  • Review phasors and three-phase electric circuits.
  • Understand the basic principles of power electronics in drives using switch-mode converters and pulse width modulation to synthesize the voltages in dc and ac motor drives.
  • Understand the basic concepts of magnetic circuits as applied to electric machines.
  • Understand the two basic principles (generation of force and emf) that govern electromechanical energy conversion.
  • Describe the operation of dc motor drives to satisfy four-quadrant operation to meet mechanical load requirements.
  • Design torque, speed and position controller of motor drives.
  • Clearly learn to use space vectors presented on a physical basis to describe the operation of an ac machine.
  • Understand the basic principles of Permanent Magnet AC (Self-Synchronous AC) drives.
  • Describe the operation of induction machines in steady state that allows them to be controlled in induction-motor drives.
  • Learn speed control of induction motor drives in an energy efficient manner using power electronics.
  • Learn the basic operation of stepper motors and switched-reluctance motor drives.
  • Learn about the energy efficiency of electric drives and inverter-motor interactions.


Electric Machines and Drives: A First Course
Author: Mohan
ISBN: 1118074815     9781118074817
Publisher: Wiley

Complete Solution Manual for the "Electric Machines and Drives: A First Course"  To receive a copy of the entire solutions manual, contact John Wiley & Sons and register as a faculty member.   


The new electric drives lab does not require MATLAB or dSpace and is 1/10ᵗʰ the cost of the previous version. The labs are implemented using freely available numerical simulation and real-time controller platform, Sciamble Workbench developed at the University of Minnesota.

New Version using Sciamble

Latest lab manual

Instructions to install Sciamble Workbench

Acquire complete electric drives laboratory lab kit

Note: These labs can be accessed remotely. For more details visit Sciamble

Hardware Kit Drives
Inverter Enclosed Structure
Inverter Without Enclosure

List of Experiments

Basic Drives Lab (Undergraduate level)

Advanced Drives Lab (Graduate level)

  1. Switched-mode DC-DC converter
  2. Characterization of DC motor
  3. DC motor closed-loop speed control
  4. Four-quadrant operation of DC motor
  5. Torque-load angle characteristics and speed control of PMAC motor
  6. Determination of Induction motor parameters
  7. Torque-speed characteristics and speed control of Induction motor
  1. Characterization of Induction motor
  2. Induction motor V/f control
  3. Vector control of induction motor
  4. Encoder-less vector control of induction motor
  5. Direct torque control of induction motor
  6. Space vector Pulse width modulation of two level three-phase inverter
  7. Vector control of surface PMAC motor