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
- Introduction to D.C. motors and D.C. generators
- Fundamentals of the D.C. generator
- Generator characteristics
- Load characteristics of a shunt and compound D.C. generator
- Effect of speed on shunt generators
- Load characteristics of a self-excited shunt and compound generator
- Counter E.M.F. of a D.C. motor / motor torque and horsepower
- Fundamental motor equation
- D.C. motor characteristics and loading effects
- D.C. shunt motor and series motor loading conditions
- Introduction to single-phase transformers
- Coil polarities and transformer ratios
- Single-phase transformer relationships
- Transformer open- and short-circuit tests, single-phase transformer efficiency
- Three-phase transformers
- Delta & Wye configurations
- Transformer three-phase – open Delta connection
- Three-phase transformer loads
- Power factor correction
- Three-phase transformer problems
- Three-phase (poly-phase) induction motor – squirrel cage
- Three-phase induction motor characteristics and performance
- Load characteristics of the squirrel cage induction motor
- Starting and running characteristics of a squirrel cage induction motor
- Running characteristics of the three-phase squirrel cage motor (no-load condition, locked rotor test, loaded condition)
- Determining starting torque using locked rotor method of squirrel cage motor
- Starting characteristics of the squirrel cage induction motor
- Three-phase motors and circuit conditions
- Describe how DC motors and DC generators functionally operate.*
- Operate DC motors and generators successfully in the laboratory.
- Describe how AC alternators operate.*
- Operate an AC alternator successfully in the laboratory.*
- Describe how three phase and single phase induction motors operate.
- Operate AC motors successfully in the laboratory.
- Calculate motor losses and state the efficiency of an AC inductor motor.*
- Describe how synchronous and wound-rotor induction motors operate.
- Operate synchronous and wound-rotor motors successfully in the laboratory.
- Describe how universal motors operate.
- Operate universal motors successfully in the laboratory.
Assessment and Requirements
Methods for measuring achievement of objectives:
- Tests will be given throughout the semester. Tests scores represent 55% of the course grade.
- 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.
- 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.