What is AC motor & Types?

The two main types of AC motors are induction motors and synchronous motors. The induction motor (or asynchronous motor) always relies on a small difference in speed between the stator rotating magnetic field and the rotor shaft speed called slip to induce rotor current in the rotor AC winding.

What are the 3 basic types of AC motors?

Due to the magnetic field, the armature winding utilises energy and generates a torque that makes the motor shaft turn. The different types of electric motors are classified into three main segments – DC motor, AC motor, and motors for particular purposes.

What are AC motors used for?

AC motors are viable power sources for a range of applications due to their flexibility, efficiency and quiet operation. General uses for AC motors include pumps, water heaters, lawn and garden equipment, ovens, and off-road motorized equipment.

Which motor is used in AC compressor?

There are two common splitphase motors that are used in HVAC applications, the capacitor-start-induction-run motor and the resistance-start-induction-run electric motor. Capacitor start motors make use of a start capacitor to boost its starting torque.

What are the 2 main parts of a 3 phase AC motor?

The Parts of the Motor



A three-phase motor has two main parts: the rotor, which turns, and the stator that turns it. The rotor is often called a squirrel cage because it consists of a circular network of bars and rings that look a bit like a cage connected to an axle.

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What is the most common type of motor?

Alternating Current (AC) Motors

  • 3-phase AC induction motors are the most widely used motors in industrial and commercial applications. …
  • 3-phase Synchronous motors are most commonly used in very large industrial applications or where exact speed is required.

How many different types of motors are there?

Basic motors have been classified into three distinct types: AC motor, DC motor, and specialized motors.

Why do AC motors need brushes?

The field induces a current flow into the shorted armature whose magnetic field opposes that of the field coils. Speed can be controlled by rotating the brushes with respect to the field axis. This motor has superior commutation below synchronous speed, inferior commutation above synchronous speed.

Why is AC motor preferred over DC?

The main advantage of Ac motor over Dc motor is that the speed – torque characteristic of AC motor is very close to the ideal characteristic. Torque of Ac motor is constant upto certain speed and then decreases, but in case of Dc motor torque linearly decreases as speed increases.

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