Maricopa Community Colleges  ABA254   19964-19975 
Official Course Description: MCCCD Approval: 04/23/96
ABA254 19964-19975 LEC 1 Credit(s) 1 Period(s)
Advanced Motor Controls
Operating principles of motor controls including solid-state controls. Motor braking, jogging, plugging and safety. Introduction to Programmable Logic Controller (PLC) motor programming. Prerequisites: (Indentured status with the Arizona Builders Alliance and ABC221) or permission of the apprenticeship coordinator.
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MCCCD Official Course Competencies:
 
ABA254   19964-19975 Advanced Motor Controls
1. Define trade terms related to advanced motor controls. (I)
2. Identify specific components in control circuits by actual inspection. (II)
3. Read and interpret motor control wiring diagrams and schematics. (II)
4. List advantages of solid-state control circuits and describe necessary precautions when working with solid-state devices. (III)
5. Explain "plugging" and "jogging' techniques for controlling motors and demonstrate proper wiring connections. (IV)
6. Describe the specific means of stopping or braking and operation of a motor. (IV)
7. Identify specific PLC components by visual inspection. (V)
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MCCCD Official Course Outline:
 
ABA254   19964-19975 Advanced Motor Controls
    I. Trade terms
        A. Armature
        B. Automatic
        C. Auxiliary
        D. Dynamic braking
        E. Gate
        F. Programmed control
        G. SCR (silicon-controlled rectifier)
        H. Other
      II. Motor controls
          A. Controller components and related symbols
          B. Types
            1. manual full voltage motor starters
            2. reversing manual starters
            3. drum switches
            4. NEC (National Electrical Code) requirements
            5. maintenance requirements
          C. AC (alternating current) magnetic starters
            1. magnetic sticking
            2. maintenance requirements
            3. thermal overLoad relays
          D. Magnetic reversing controllers
            1. AC combination motor starters
            2. AC reduced-voltage motor starters
            3. part-winding starters
            4. wye-delta magnetic starters
            5. magnetic primary resistor starters
            6. maintenance requirements
          E. Miscellaneous motor controls
            1. pneumatic and motor driven relays
            2. control transformers
            3. fuse block kits
            4. limit switches
            5. solenoids
            6. foot switches
            7. pressure switches
          F. Multispeed AC motor starters
          G. Synchronous motor controls
            1. starting synchronous motors
            2. motor braking
            3. synchronous converters
            4. semiautomatic synchronizing
            5. automatic field excitation
          H. Starting and speed-regulating rheostats and controllers
            1. maintenance
            2. new installations
            3. faceplate types
            4. drum controllers
            5. drum contactor controllers
            6. resistors for AC motors
            7. starting and speed-regulating rheostats for DC motors
          I. Direct current (DC) controllers
        III. Solid-state control circuits
            A. Silicon controlled rectifiers (SCR)
              1. operation
              2. ratings and characteristics
              3. phase control applications
            B. Solid-state motor starters
              1. function
              2. characteristics
            C. Adjustable speed drives
              1. DC drive with DC motor
              2. voltage source inverter
              3. current source inverter
              4. slip energy recovery system
              5. Load-commutated inverter
              6. cycloconverter drive
            D. Precautions
          IV. Deceleration
              A. Plugging
              B. Jogging
              C. Braking
                1. type SA (self adjusting) brakes
                2. troubleshooting electric brakes
                3. type DI (dynamic induction) brakes
                4. characteristics of motor brake parts
            V. Programmable Logic Controllers (PLC) components
                A. Modular chassis
                B. Power supply
                C. Processor
                  1. basic SLC 500 module
                  2. enhanced SLC 5/03 processor
                  3. enhanced SLC 5/04 processor
                D. I/O Cards (input/output)
                  1. discrete input modules
                  2. discrete output modules
                E. Specialty cards
                  1. analog modules
                  2. high-speed counter modules
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