What is an Induction Motor?

Encyclopedia
08/14/2024 13:26:36

What is an Induction Motor?

Induction motor definition

An induction motor is a type of AC motor in which torque is generated from the rotating magnetic field of the stator to the rotor by electromagnetic induction.

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Working principle

The working principle of the induction motor is that the alternating current induces a magnetic field in the stator, and then induces a current in the rotor, generating torque and making the rotor rotate.

Type of induction motor

Type of single-phase induction motor

  • Split phase induction motor

  • Capacitor start induction motor

  • Capacitor start and capacitor run induction motor

  • Shaded pole induction motor

Type of three-phase induction motor

  • Squirrel cage induction motor

  • Slip ring induction motor

Self-starting characteristic

Three-phase induction motors are self-starting because the phase difference between three single-phase lines creates a rotating magnetic field, and single-phase motors often require capacitors to start.

Speed control and efficiency

Induction motors offer high efficiency through variable speed control options, making them suitable for a variety of industrial applications, although their speed will vary with the load.

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