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ELECTRICAL MACHINES (GENERATORS (DC GENERATOR (SOURCE OF MECHANICAL POWER,…

- - - - WIRE LOOP ROTATING IN STATIONERY MAGNETIC FIELD
        
        PRODUCE INDUCED EMF
      - CONTACTS OF BRUSHES CONNECT TO AN EXTERNAL CKT OR LOAD
    - - ROTATING-ARMATURE
        
        STATIONERY MAGNETIC FIELD
        
        SLIP RINGS
        
        ROTATING ARMATURE
        
        USED FOR LOW POWER RATING
      - ROTATING-FIELD
        
        STATIONERY ARMATURE
        
        ROTATING MAGNETIC FIELD
        
        USED FOR HIGH VOLTAGE APPLICATION
        
        ROTOR TYPES
        
        SALIENT-POLE
        
        LOW SPEED
        
        TURBINE-DRIVEN
        
        HIGH SPEED
    - - ROTOR
        
        ROTATES
        
        ROTOR ARMATURE
      - STATOR
        
        STATIONERY
        
        STATIONERY ARMATURE
  - - - TO ROTOR OF GENERATOR
      - PRIME MOVER
        
        TURN ROTORS OF ALL GENERATORS (LARGE,SMALL,AC OR DC)
        
        CLASSES
        
        HIGH-SPEED
        
        STEAM AND GAS TURBINES
        
        LOW-SPEED
        
        INTERNAL COMBUSTION ENGINES
        
        ELECTRIC MOTORS
    - - FIELD WINDINGS
        
        CURRENT FLOWS TO A
        
        STEADY MAGNETIC FIELD
        
        FIELD EXCITATION
        
        SELF-EXCITED
        
        SERIES-WOUND
        
        SHUNT-WOUND
        
        COMPOUND-WOUND
        
        2 more items...
        
        SEPARATELY-EXCITED
    - - SINGLE LOOP TERMINAL
        
        CONNECTED TO A TWO-SEGMENT SPLIT
        
        COMMUTATOR
        
        COMMUTATION PROCESS
        
        CHANGE AC VOLTAGE TO PULSATING DC VOLTAGE
    - - ALWAYS ROTOR
  - - - STRENGTH OF MAGNETIC FIELD
      - ANGLE OF CONDUCTOR CUTTING THE MAGNETIC FIELD
      - MOVEMENT SPEED OF CONDUCTOR
      - LENGTH OF CONDUCTOR WITHIN THE MAGNETIC FIELD
- - - - SITUATIONS REQUIRING CONSTANT SPEED
        
        SPEED DETERMINED BY THE FREQUENCY OF THE AC VOLTAGE APPLIED TO MOTOR TERMINALS
    - - SERIES
        
        SIMILAR TO DC MOTOR
      - SYNCHRONOUS
        
        ROTORS ENERGIZED BY DC VOLTAGE
        
        USED TO DRIVE DC GENERATORS
      - INDUCTION
        
        MOST COMMONLY USED
        
        ROTORS ENERGIZED BY INDUCTION
        
        TYPES
        
        SQUIRREL-CAGE
        
        WOUND
    - - SINGLE-PHASE
        
        LOW HORSEPOWER APPLICATION
        
        EXAMPLES
        
        REPULSION-INDUCTION
        
        REPULSION-START
        
        REPULSION
        
        SPLIT-PHASE WITH CAPACITOR
        
        SPLIT-PHASE
        
        RELUCTANCE
        
        SHADED-POLE
        
        SERIES/UNIVERSAL
        
        SYNCHRONOUS
      - POLYPHASE
        
        LARGE HORSEPOWER APPLICATION
        
        EXAMPLES
        
        SQUIRREL-CAGE INDUCTION
        
        WOUND-ROTOR TYPE INDUCTION
        
        SYNCHRONOUS
  - - - BOTH SERIES AND SHUNT ARE USED SIMULTANEOUSLY
      - SHORT-SHUNT COMPOUND
    - - LARGER EQUIPMENT DEPEND ON DC MOTOR FOR THEIR POWER TO MOVE
    - - DEPENDS IN EXCITATION FIELD CONNECTION
        
        SHUNT
        
        SERIES
    - - TYPES
        
        GRAMME-RING
        
        DRUM-WOUND