Maricopa Community Colleges  ELC210   19956-99999 
Official Course Description: MCCCD Approval: 02/28/95
ELC210 19956-99999 LEC 3 Credit(s) 3 Period(s)
AC Machinery and DC Machinery
Principles and operation of AC(Alternating current) and DC(direct current) motors, generators, and alternators. Includes single-phase motors along with induction, synchronous, and wound-rotor types of three-phase motors. DC motors including shunt-field, series field, wound rotor, permanent magnet, stepper and brushless types. Prerequisites: None.
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MCCCD Official Course Competencies:
 
ELC210   19956-99999 AC Machinery and DC Machinery
1. Describe the construction and operation of single phase and three-phase AC generators. (I)
2. Describe the principle of induction between the field and the rotor for a DC machine. (I)
3. Compare the various types of field excitation, i.e., series, shunt and compound. (I, II)
4. Describe the use of brushes and commutators in the conversion of AC to DC. (II)
5. Describe the principle of induction between the field and the rotor for an AC machine. (III)
6. Explain the construction and operation of an AC induction motor including the squirrel-cage type of rotor. (III)
7. Explain the construction and operation of a wound-rotor type of AC motor. (IV)
8. Explain the construction and operation of a synchronous type of AC motor. (V)
9. Describe the techniques of field excitation used to vary the power factor output of a synchronous type of AC motor. (V)
10. Describe the characteristics of the voltage-current relationship in the starting and running modes for an AC motor. (VI)
11. Describe the techniques used for reduced voltage starting of AC motors. (VI)
12. Explain the operation of single phase AC motors along with the application of start-windings, i.e., split-phase, capacitor-start, etc. (VI)
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MCCCD Official Course Outline:
 
ELC210   19956-99999 AC Machinery and DC Machinery
    I. Generators and Alternators
        A. Construction
        B. Operation
        C. Principle of induction
          1. Field
          2. Rotor
        D. Types of field excitation
          1. Series
          2. Shunt
          3. Component
      II. DC Motors
          A. Series field
          B. Shunt field
          C. Brushless
          D. Stepper
          E. Permanent magnet
          F. AC to DC conversion
        III. Induction Motor
            A. Squirrel-cage rotor
            B. Rotor induction
            C. Rotating field principle
            D. Synchronous speed and slip
            E. Torque production
            F. Efficiency and power factor
          IV. Wound-Rotor Motor
              A. Basic construction/operation
              B. Rotor circuit
              C. Rotor current control
            V. Synchronous Motor
                A. Basic construction/operation
                B. Rotor excitation
                C. Starting procedure
                D. Synchronization
                E. Field excitation
                F. Power factor correction/output
              VI. Single phase motors - voltage/current
                  A. Split-phase
                  B. Capacitor start
                  C. Shaded-pole
                  D. Capacitor run
                  E. Start-winding
                  F. Run-winding
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