Department of Technology

Course Author/Instructor

Dr. Carl J. Spezia, PE

Associate Professor

Department of Technology


Electrical Engineering Technology Online

ET 332a Dc Motor, Generators and Energy Conversion Devices

Course Introduction and Orientation

This course examines the theory and operation of DC machines.  DC machines are energy conversion devices that can operate as either motors or generators.  This course covers relevant theory and reviews practical operation of these machines.  Circuit models and mathematical formulas will describe their operation.  The course develops torque-speed and voltage-load characteristics of common types of DC machines.  The course introduces simple protection and control schemes.  The course content will emphasize machine efficiency and proper motor application.  Photocell arrays are a source of dc power.  This course introduces the science and application of photovoltaic devices.  Simple economic comparisons highlight the cost of solar energy when compared to grid-supplied electricity.  The measurement and test of machine characteristics will be carried out in laboratory experiments.  Software packages will be used to eliminate tedious calculations and speed data acquisition.

Mailing Address:

1230 Lincoln Drive

Room D110

Carbondale, IL 62901

Instructor Contact Information

Phone: 618-453-7839


Skype Name: carl.spezia

Carl Spezia Photo

Required Software

You will need certain software to view the presentations and videos in this course.  Some of the presentations require Flashplayer, which is available from here for download.  The software demonstrations and the course introduction require Microsoft Silverlight, which is available for download from here.  Download and install these items before you begin the course.  You will also need Microsoft Excel 2007 or above to complete some of the course assignments. 

What Next?

You need to access the course syllabus from this page or from the course outline in Desire2Learn.  Then view the instructor’s introduction video.

Textbook:       Electrical Machines, Theory, Operation, Applications, Adjustment, and Control, 2nd Edition, Charles I. Hubert


References:     Electric Machinery and Transformers, Irving L. Kosow

                      "IEEE Guide: Test Procedures for Direct-Current Machines", IEEE Standard 113-1985

                      Energy Science Principles, Technologies, and Impacts, John Andrews and Nick Jelley

Lab TA/Grader




Room: D106

Carbondale, IL 62901

Emergency Procedures

 SIUC is committed to providing a safe and healthy environment for study and work.  Because some health and safety circumstances are beyond our control, we ask that you become familiar with the SIUC Emergency Response Plan and Building Emergency Response Team (BERT) program.  Emergency response information is available on the BERT website at, Department of Public Safety’s website (disaster drop down) and in the Emergency Response Guidelines pamphlet.  Know how to respond to each type of emergency.


Instructors will provide guidance and direction to students in the classroom in the event of an emergency affecting your location.  It is important that you follow these instructions and stay with your instructor during an evacuation or sheltering emergency.  The Building Emergency Response Team will assist your instructor in evacuating the building or sheltering within the facility.