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Rotating Magnetic Field & Principle of Induction Motor

PRESENTED BY

DR. SHAIKH MOHAMMED SUHEL

DEPARTMENT OF ELECTRICAL ENGINEERING

R.N.G.PATEL INSTITUTE OF TECHNOLOGY, BARDOLI

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A

Presentation

on

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  • Which motor is used in

traction application?

  1. DC Series Motor
  2. Induction Motor
  3. BLDC Motor
  4. None of the above

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  • Rugged
  • Cost, efficiency and reliability
  • No brushes- less maintenance
  • Low mech time constant
  • Suitable for all location

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  • Speed control (Complex)
  • Starting torque
  • Drive cost

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AC Drives v/s DC Drives

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Explain How Rotating Magnetic Field is generated?

Induction motor

Rotating magnetic field

N

S

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Rotating Magnetic Field

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Rotating Magnetic Field

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> 1200 phase displacement with respect to time and space

Rotating Magnetic Field

 

 

 

 

 

 

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Rotating Magnetic Field

 

 

 

 

 

 

 

 

 

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Rotating Magnetic Field

 

 

 

 

 

 

 

 

 

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Rotating Magnetic Field

 

 

 

 

 

 

 

 

 

 

 

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Rotating Magnetic Field

 

 

 

 

 

> The resultant flux is constant and 1.5 times the maximum value of flux due to any phases

> The resultant flux rotates around the stator at synchronous speed given by

N

S

S

S

N

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Induction motor

Rotating magnetic field

=3000 RPM

  • 1200 phase displacement with respect to
  • time and space

Basic Principle of Induction Motor

S

N

> Current will induce in the rotor conductor

> Lorentz force equation

> Lenz’s Law

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Thank You!

& Checkout our video on

Rotating Magnetic Field:

https://youtu.be/gqZjMFC12Bk?si=clyRWXjrKsBlJEuG