ETE 244           ELECTRICAL MACHINERY AND CONTROLS             4 CREDITS

DESCRIPTION:  Theory and utilization of electrical motors and generators, including AC and DC motors and drives are studied.  Theory and utilization of limit switches, solenoids, relays, contactors and solid state devices in control circuits are included.  Digital and analog control techniques, ladder logic and programming techniques are applied to industrial and manufacturing processes.  Lecture, 3 hours; Laboratory, 2 hours.  Prereq:  consent of instructor.

IMPLEMENTATION DATE:  Fall 1997

COURSE COMPETENCIES:
Upon completion of this course, will be able to:
1. Identify various electrical motors and generators including AC and DC units, single and three phase;
2. describe various drive controllers of electrical motors;
3. identify various mechanical devices including limit switches, solenoids, relays, contactors and motor  starters that are used in electrical control;
4. define the operation and application of mechanical devices including limit switches, solenoids, relays,  contactors, and motor starters that are used in electrical control;
5. describe digital and analog control techniques including on-off control, on-off control with hysteresis,  proportional control and PID control; and
6. identify elements of a ladder logic diagrams and define the programs control functions.

COURSE OUTLINE:
I. Theory of Electrical Control
 A. Electro-Mechanical
 B. Solid State
 C. Microprocessor Bases

II. Operation and Utilization Electrical Control Devices
 A. Electro-Mechanical
  1. Limit Switches
  2. Solenoids
  3. Relays
  4. Contactors
  5. Motor Starters
   a) AC
   b) DC
  6. Push Buttons
 B. Solid State
  1. Discrete Components
   a) Silicon Controlled Rectifiers
   b) Triacs
   c) Photo-Sensitive Devices
   d) Other Thyristors
  2. Solid State Relays
  3. Timing Circuits
 C. Electrical Machinery
  1. Alternators
   a) single phase
   b) three phase
  2. Generators
  3. AC Motors
   a) single phase
   b) three phase
  4. DC Motors
  5. Drive Controllers
   a) DC speed control
   b) variable frequency drives

LIST OF EXPERIMENTS/ACTIVITIES (If laboratory or clinic is involved):

A. Use mechanical switching devices in electrical control situations
 1. Operate a limit switch to apply or remove power
 2. Use solenoids to open and close valves or to position work pieces
 3. Demonstrate relays in control of simulated industrial situations
 4. Investigate the use of contactors or controllers in motor control and operation
B. Use solid state control devices in electric control situations
 1. Investigate principles of SCR’s in DC and AC control circuits
 2. Deliver power to circuits with Triacs
 3. Measure bandwidth of photo-sensitive control devices
 4. Examine operating conditions of thyristor control
 5. Perform electrical control of output devices using sold state relays
 6. Observe operation of timing circuits in control situations
C. Use of Electrical Motors
 1. DC Motors
 2. AC Motors
 3. Start and Speed Control
  a. Resistive Starting
  b. Full-voltage Starting
  c. Frequency Drives
  d. Soft Starts

SUGGESTED LEARNING RESOURCES FOR COURSE:
Electrical Motor Controls:  Automated Industrial Systems 3rd Edition; Rockis; American Technical Publishers; 92, Electrical Control for Machines:  5th Edition; Rexford; Delmar Publishers; 97.

DATE(S) OF PREVIOUS COMMUNITY COLLEGE ACTIONS:
APPROVED:  June 1971
REVISED:  June 1977, January

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Revised 7/26/04