Jun 25, 2024  
2021-2022 Course Catalog 
    
2021-2022 Course Catalog [ARCHIVED CATALOG]

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ELT 728 - Motor Controls and Power Electronics

Credits: 4
Lecture Hours: 3
Lab Hours: 2
Practicum Hours: 0
Work Experience: 0
Course Type: Voc/Tech
An overview of industrial motor controls and industrial control electronics. Students will learn ladder diagrams to implement practical control systems. Student will learn power electronics used in industry
Competencies
  1. Acquire safety awareness
    1. Determine the correct fire extinguisher for clas A, B, or C fire.
    2. Determine the proper use of trade hand tools.
    3. Describe power tools and their use in the trade.
    4. Lockout/tag out procedures
    5. Describe safety precautions when working with HV wiring.
    6. Wire circuits with power off.
    7. Run neutral only to loads or coils to protect students and circuit breakers.
  2. Understand motor ladder/line diagrams.
    1. Fabricate two and three wire control circuits.
    2. Proper notation, descriptions, notation of ladder diagrams.
    3. Proper notation, descriptions, notation of ladder diagrams.
    4. Relate the three basic sections of a ladder diagram.
    5. Implement memory/latching circuits.
    6. Implement relay logic (AND/OR/NAND/NOR) circuits.
    7. Use interlocking and sequence control.
    8. Select proper parameters in solenoid application.
    9. Describe shading coil induction motor, solenoids, contactors and coils.
  3. Design circuits using timers to facilitate applications.
    1. Draw timing charts.
    2. Use pneumatic timers.
    3. Use synchronous timers.
  4. Describe the principles of operation, advantages of, and typical uses of most electric motors.
    1. Discuss: split phase, capacitor start, shunt, series, compound DC, brushless and stepping motors.
    2. Discuss: 3 phase, synchronous and wound rotor motors
    3. Discuss : Stepping motors full and half stepping
    4. 3Describe the shunt, series and compound motors.
    5. Discuss Forward and reverse operation of three phase, single phase and brush type motors.
    6. Disccuss Reduced current starting.
    7. Discuss servo motors
    8. Discuss motor braking systems
  5. Analyze power distribution systems and fundamentals.
    1. Describe Delta connected three phase power systems
    2. Describe Wye connected three phase power systems
    3. Calculate and measure Phase to phase voltages
    4. Calculate and measure Phase to Neutral Voltages
    5. Measure and calculate apparent, real and imaginary power in three phase circuits
    6. Discuss over current protection
  6. Analyze the following types of electrical components specifications.
    1. Switchboards
    2. Panelboards
    3. M.C. Centers
    4. Busways
    5. NEMA enclosures
    6. Electrical load requirements for machinery and organizations
    7. Alternative conventions: IEC vs. NEMA
  7. Measure practical parameters of DC electric motors.
    1. Measure and use Kt.
    2. Measure and use Kemf.
    3. Predict electrical motor performance given measured motor parameters.
  8. Understand power handling semiconductor circuits.
    1. Describe Silicon Controlled Rectifiers (SCRs)
    2. Describe Triacs
    3. Describe Power MOS-FETS
    4. Describe Unipolar Junction Transistors (UJTs)
  9. Understand Switching Power Supplies.
    1. Describe Buck Converters
    2. Describe Boost Converters
    3. Describe Push-Pull Converters
  10. Understand power handling capabilities of power semiconductors.
    1. Explain what Thermal Resistance is and its importance in cooling systems
    2. Properly size heat sinks and cooling fans for power semiconductors
    3. Understand proper power semiconductor mounting techniques
    4. Describe arc suppression techniques



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