TAEL-145: DC and AC Motors

Business, Entrepreneurship, and Professional Development
Trade & Apprentice Education
Skilled Trade & Apprenticeship
Academic Level
Course Subject
Tael - Electrical
Course Number
Course Title
DC and AC Motors
Credit Hours
Instructor Contact Hours Per Semester
62.00 (for 15-week classes)
Student Contact Hours Per Semester
62.00 (for 15-week classes)
Grading Method
TAEL-105 or TAE Apprentice Coordinator/Instructor Permission
Catalog Course Description

Covers DC and AC motor fundamentals. Includes DC generators; series, shunt, and compound DC motors; single-phase and three-phase AC induction motors; and synchronous, wound rotor, and universal motors. Compares AC alternators to DC generators.

Goals, Topics, and Objectives

Core Course Topics
  1. Introduction to D.C. motors and D.C. generators
  2. Fundamentals of the D.C. generator
  3. Generator characteristics
  4. Load characteristics of a shunt and compound D.C. generator
  5. Effect of speed on shunt generators
  6. Load characteristics of a self-excited shunt and compound generator
  7. Counter E.M.F. of a D.C. motor / motor torque and horsepower
  8. Fundamental motor equation
  9. D.C. motor characteristics and loading effects
  10. D.C. shunt motor and series motor loading conditions
  11. Introduction to single-phase transformers
  12. Coil polarities and transformer ratios
  13. Single-phase transformer relationships
  14. Transformer open- and short-circuit tests, single-phase transformer efficiency
  15. Three-phase transformers
  16. Delta & Wye configurations
  17. Transformer three-phase – open Delta connection
  18. Three-phase transformer loads
  19. Power factor correction
  20. Three-phase transformer problems
  21. Three-phase (poly-phase) induction motor – squirrel cage
  22. Three-phase induction motor characteristics and performance
  23. Load characteristics of the squirrel cage induction motor
  24. Starting and running characteristics of a squirrel cage induction motor
  25. Running characteristics of the three-phase squirrel cage motor (no-load condition, locked rotor test, loaded condition)
  26. Determining starting torque using locked rotor method of squirrel cage motor
  27. Starting characteristics of the squirrel cage induction motor
  28. Three-phase motors and circuit conditions
Core Course Learning Objectives (Separated)
  1. Describe how  DC motors and DC generators functionally operate.*
  2. Operate DC motors and generators successfully in the laboratory.
  3. Describe how AC alternators operate.*
  4. Operate an AC alternator successfully in the laboratory.*
  5. Describe how three phase and single phase induction motors operate.
  6. Operate AC motors successfully in the laboratory.
  7. Calculate motor losses and state the efficiency of an AC inductor motor.*
  8. Describe how synchronous and wound-rotor induction motors operate.
  9. Operate synchronous and wound-rotor motors successfully in the laboratory.
  10. Describe how universal motors operate.
  11. Operate universal motors successfully in the laboratory.

Assessment and Requirements

Assessment of Academic Achievement

Methods for measuring achievement of objectives:

  1. Tests will be given throughout the semester.  Tests scores represent 55% of the course grade.
  2. Laboratory activities and performance exercises will be done where students will demonstrate an understanding of practical applications.  These will make up 20% of the course grade.
  3. A written final exam will be given which will represent 25% of the course grade.       

Texts, handouts, and/or workbooks will be determined by the TAE Department.


Approval Dates

Effective Term
Summer 2014
ILT Approval Date
Curriculum Committee Approval Date