Maricopa Community Colleges  ABC143   20034-20045 
Official Course Description: MCCCD Approval: 03/25/03
ABC143 20034-20045 LEC 1 Credit(s) 1 Period(s)
Motors: Theory and Application
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. Prerequisites: Registered Apprentice status or permission of the apprenticeship coordinator.
Go to Competencies    Go to Outline
 
MCCCD Official Course Competencies:
 
ABC143   20034-20045 Motors: Theory and Application
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)
Go to Description    Go to top of Competencies
 
MCCCD Official Course Outline:
 
ABC143   20034-20045 Motors: Theory and Application
    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
                  Go to Description    Go to top of Competencies    Go to top of Outline