Untitled document
Upon completion of the course the student will be able to:
1. Analyze the operating principles of several different types
of AC and DC motors.
2. Compile proper safety procedures for working around motors and
rotating machinery.
3. Originate and apply proper tag-out procedures when working on
electrical equipment.
4. Evaluate and repair commutator and slip ring problems.
5. Evaluate and repair defective rectifiers in alternators.
6. Identify and evaluate various motor starting problems.
7. Describe the operation and principles of squirrel cage rotators
in induction motors.
Untitled document
1. Safety
2. Magnetism
a. poles
b. fields
c. repulsion
d. attraction
e. permeability
f. residual magnetism
3. Electromagnetism
a. flux density
b. field strength
c. hysterisis
d. effect of current increase and decrease
4. Counter current generation back EMF, Lenz's Law connection
5. Generators, basics of generating electric current, effects of magnetic
field strength, speed of magnetic field cutting with a conductor,
number of wires cut by magnetic fields
6. AC generation, (alternators) single phase machines
a. slip rings-brushes
b. rotating armature, stationary fields
c. rotating fields, stationary armature
d. self excitation
e. external excitation
7. AC generation, (alternators) poly phase machines
a. rotating armature, stationary fields
b. rotating fields, stationary armature
c. self excitation
d. external excitation
8. Alternators with DC outputs
a. rectification
b. single phase
c. poly phase
9. Types of machines
1. series wound
a. adding fields
b. opposing fields
2. shunt wound
3. compound wound
a. series-parallel
b. parallel-series
10. DC Motors
a. Series motors characteristics
b. Shunt motor characteristics
c. Compound motor characteristics
11. AC Motors, series (universal motors)
a. characteristics
b. comparison to DC series motors
12. AC Motors, induction
a. Rotating magnetic fields-generation of
b. Single phase rotating fields-generation of
c. Poly-phase rotating fields-generation of
d. Transformers and transformer action
e. Eddy currents
f. Stators
g. Rotors
h. Squirrel cage rotors
i. Starting current
j. Stall current
k. Run current
13. Starting Single Phase Motors
a. Synchronous motors
b. Shaded pole motors
c. Capacitor start
d. Resistance start
14. Motor Controllers
a. DC
b. AC
Untitled document
Application of concepts and problem solving in the following areas:
1. Compare, in writing, the operating principles of AC and DC motors.
2. Demonstrate and utilize proper safety techniques when working with
motors.
3. Inspect and repair commutators, slip rings and rectifiers.
4. Assess the operation of squirrel cage rotators use in induction motors.
| Writing: Assessment tools that demonstrate writing skill and/or require students to select, organize and explain ideas in writing. | Writing
5 - 10% |
| Written homework | |
| Problem solving: Assessment tools, other than exams, that demonstrate competence in computational or non-computational problem solving skills. | Problem Solving
20 - 50% |
| Homework problems | |
| Skill Demonstrations: All skill-based and physical demonstrations used for assessment purposes including skill performance exams. | Skill Demonstrations
20 - 50% |
| Class performances, Performance exams | |
| Exams: All forms of formal testing, other than skill performance exams. | Exams
10 - 30% |
| Multiple choice, True/false, Matching items, Completion | |
| Other: Includes any assessment tools that do not logically fit into the above categories. | Other Category
0 - 0% |
| None | |
Untitled document
Electric Motors and Drives - Fundamentals, Types & Applications, 2nd ed.
Hughes, Austin. Publisher: Butterworth-Heineman, 1993.
Rotating Electrical Machines and Power Systems. Patrick, Dale R. and
Fardo, Stephen W. Prentice-Hall, 2000.