What is 3phase induction motor PDF?

What is 3phase induction motor?

Three Phase AC Induction Motor. The three-phase AC induction motor is a rotating electric machine that is designed to operate on a three-phase supply. This 3 phase motor is also called as an asynchronous motor. … The principle of operation of this motor is based on the production of a rotating magnetic field.

What is a 3phase motor?

Three-phase motors are a type of AC motor that is a specific example of a polyphase motor. These motors can be either an induction motor (also called an asynchronous motor) or a synchronous motor. The motors consist of three main components – the stator, the rotor, and the enclosure.

What is working principle of 3 phase induction motor?

The working of the three-phase induction motor is based on the principle of electromagnetic induction. When three-phase stator winding of an induction motor is energized from a 3 phase supply, a rotating magnetic field is set up which rotates around the stator at synchronous speed (Ns).

Why is it called three-phase induction motor?

A 3 phase induction motor derives its name from the fact that the rotor current is induced by the magnetic field, instead of electrical connections.

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What is a induction motor used for?

These are the most common type of AC motor and are important to industry due to their load capacity, with Single-Phase induction motors being used mainly for smaller loads, for example in household appliances whereas, Three-Phase induction motors are used more in industrial applications including compressors, pumps, …

What is the principle of induction motor?

Working Principle of Induction Motor

The electromagnetic induction is the phenomenon in which the electromotive force induces across the electrical conductor when it is placed in a rotating magnetic field. When the three phase supply is given to the stator, the rotating magnetic field produced on it.

Why are 3 phase motors used?

Three-phase power is mainly used directly to power large motors and other heavy loads. Small loads often use only a two-wire single-phase circuit, which may be derived from a three-phase system.

What are types of induction motor?

Types of Induction Motors

  • Split Phase Induction Motor.
  • Capacitor Start Induction Motor.
  • Capacitor Start and Capacitor Run Induction Motor.
  • Shaded Pole Induction Motor.

What are the types of 3 phase induction motor?

There are three types of 3- phase induction motors namely plain or squirrel cage induction motor, slip-ring or wound rotor induction motor and double cage rotor induction motor.

What are the advantages of 3 phase induction motor?

Advantages of Three Phase Induction Motor

It requires less maintenance. It has high efficiency and good power factor. It is less expensive. It has self-starting torque.

What are the applications of 3 phase induction motor?

Application of 3-Phase Induction Motors

  • Pumps and submersible.
  • Pressing machine.
  • Lathe machine.
  • Grinding machine.
  • Conveyor.
  • Flour mills.
  • Compressor.
  • And other low mechanical power applications.
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What are the advantages of 3 phase IM?

Unlike synchronous motors, a 3 phase induction motor has a high starting torque, good speed regulation and reasonable overload capacity. An induction motor is a highly efficient machine with full load efficiency varying from 85 to 97 percent.

Where are induction motors used?

AC induction motors are the most common electric motors in the world. These simple, reliable and economical motors are found in refrigerators, washing machines and furnaces, as well as conveyors, pumps, winders, wind tunnels and other industrial equipment.

What is 3 phase electrical supply?

Three-phase power is a three-wire ac power circuit with each phase ac signal 120 electrical degrees apart. Residential homes are usually served by a single-phase power supply, while commercial and industrial facilities usually use a three-phase supply.