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Induction motor construction
Induction motor construction
Induction motor construction
Induction motor construction
Induction motor construction
Induction motor construction
Induction motor construction
Induction motor construction
Induction motor construction
Induction motor construction
Induction motor construction
Induction motor construction
Induction motor construction
Induction motor construction
Induction motor construction
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Induction motor construction

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  • 1. To download visit ayyarao.blogspot.com Feb 28, 2012 INDUCTION MOTOR
  • 2. AC Machines
    • Three-Phase Induction Motors.
    • Synchronous Machines.
    • Single-Phase Motors.
    • Stepper and Brushless DC Motors.
    Feb 28, 2012
  • 3. INDUCTION MOTOR Feb 28, 2012
    • ADVANTAGES :
    • 3-phase induction motors are simple & rugged.
    • Its cost is low & it is reliable
    • Its has high efficiency.
    • Its maintenance cost is low
    • Its is self starting motor
    • Suitable for all environments like coal mines & chemical factories
  • 4. Construction Feb 28, 2012
  • 5. Construction Feb 28, 2012
  • 6. Construction
    • A 3-phase induction motor has two main parts
    • Stator
    • Rotor
    • Stator
    • The stator of an induction motor
    • consists of Stator Frame,
    • Stator core, 3 phase winding,
    • two end covers, bearings etc.
    Feb 28, 2012
  • 7. Construction
    • Stator core is a stack of cylindrical steel laminations.
    • Slots are provided on the inner periphery.
    • Three windings are space displaced by 120 0 electrical.
    • Large size motors use open slots.
    • Small size motors use semi closed slots.
    • The air gap length should be as small as possible
    Feb 28, 2012
  • 8. Construction
    • Stator frame provides only mechanical support to the stator core.
    • The stator winding for a definite number of poles .
    • Greater the poles, lesser the speed and vice versa.
    • Rotor
    • Squirrel-cage rotor
    • Phase-wound rotor
    Feb 28, 2012
  • 9. Construction
    • Squirrel-Cage Rotor
    Feb 28, 2012
  • 10. Construction
    • Squirrel-cage rotor
    • The rotor winding is in form of copper bars.
    • The copper bars are revited, welded with end rings.
    • No external resistance can be inserted in the rotor circuit.
    Feb 28, 2012
  • 11. Construction
    • Wound rotor
    • The rotor winding is uniformly distributed..
    • Three leads are connected to the slip rings.
    • Carbon brushes are pressed on the slip rings.
    Feb 28, 2012
  • 12. Construction Feb 28, 2012
  • 13. Construction
    • Phase-wound Rotor
    Feb 28, 2012
  • 14. Construction Feb 28, 2012
  • 15. INDUCTION MOTOR Feb 28, 2012

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