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Center for Curriculum and Transfer Articulation
Motors: Theory and Application
Course: ABC143

First Term: 2004 Fall
 Lecture   2 Credit(s)   2 Period(s)   2 Load  
Subject Type: Occupational
Load Formula: S


Description: Overview of electric motors including types, operation, and applications. Assembly and disassembly. Mounting and connections according to National Electrical Code (NEC). Also troubleshooting, installation and handling



MCCCD Official Course Competencies
1. Explain the principles of magnetism and electromagnetic induction and describe the fundamental characteristics and operating principles of electric motors. (I)
2. Describe specific types of single and polyphase motors, name the parts and list applications of each motor type. (II, III)
3. Disassemble and assemble single and three-phase motors. (II, III)
4. Describe operation of a synchronous motor and state its advantages. (III)
5. Identify basic types of direct current motors and describe their operation. (IV)
6. Select appropriate motors and motor enclosures for specific applications. (V)
7. Describe proper mounting and motor connections according to NEC requirements. (VI)
8. Describe basic troubleshooting techniques for electric motors and explain proper installation and handling procedures. (VII, VIII)
MCCCD Official Course Competencies must be coordinated with the content outline so that each major point in the outline serves one or more competencies. MCCCD faculty retains authority in determining the pedagogical approach, methodology, content sequencing, and assessment metrics for student work. Please see individual course syllabi for additional information, including specific course requirements.
 
MCCCD Official Course Outline
I. Introduction to Electric Motors
   A. Magnetism
      1. Magnetic flux
      2. Electromagnetic induction
   B. Power and energy
      1. Mechanical power
      2. Electrical power
   C. Basic motor principles
      1. Electrical into mechanical energy
      2. Nameplate information
II. Single-Phase Motors
   A. Split-phase motors
      1. Centrifugal switch
      2. Squirrel cage rotor
   B. Capacitor motors
      1. Capacitor-start
      2. Capacitor-start-and-run
   C. Repulsion-type motors
      1. Repulsion-start, induction-run
      2. Repulsion-run
      3. Repulsion-induction
   D. Universal motors
   E. Shaded pole motors
   F. Assembly and disassembly exercise
III. Polyphase Motors
   A. Induction motors
   B. Synchronous motors
      1. Salient poles
      2. Exciter
   C. Assembly and disassembly exercise
IV. Direct Current Motors
   A. Motor action
      1. Armature
      2. Stator
      3. Shaft
   B. Shunt-wound
   C. Series-wound
   D. Compound-wound
   E. Brushless
V. Motor Enclosures and Motor Selection
   A. Hazardous atmospheres - NEC designations
      1. Class I, Group A
      2. Class I, Group B
      3. Class I, Group C
      4. Class I, Group D
      5. Class II, Group E
      6. Class II, Group F
      7. Class II, Group G
   B. Motor types
      1. A
      2. B
      3. C
      4. D
   C. Selection of electric motors
VI. Mounting and Installation - NEC Requirements
   A. NEC Article 430
   B. NEC Article 440
VII. Troubleshooting
A. Stator windings
      1. Moisture
      2. Dipping and baking
   B. Rotor windings
      1. Short circuits
      2. Voltage balance test
   C. Squirrel cage rotors
   D. Air gap
   E. Overloading and single-phase operation
   F. Testing electric motors
      1. Testing for an open motor coil
      2. Insulation tests
      3. Safety hazards
VIII. Motor Installation and Handling
   A. Uncrating
   B. Placement
      1. Moisture check
      2. Lifting
      3. Guards
      4. NEC/National Electrical Manufacturers (NEMA) requirements
      5. Thermal protector information
 
MCCCD Governing Board Approval Date: 6/22/2004

All information published is subject to change without notice. Every effort has been made to ensure the accuracy of information presented, but based on the dynamic nature of the curricular process, course and program information is subject to change in order to reflect the most current information available.