Construction Of AC Motor

The stator, or fixed exterior drum, and also the rotor, or revolving inner section coupled to the motor shaft, are the two essential elements of an AC motor. Rotating magnetic fields are created by the stator and rotor. The stator, which generates the rotating field, is wound with an alternating current.

 

Stator

A solid metal axle, a wire loop, coils, a squirrel cage, and connectors are all included. A squirrel cage is by far the most common form of AC motor, albeit it is not included in all of them. Electricity is supplied directly to the stator's outer coils in AC motors. Multiple plates comprising copper magnetic wire protrude out from the centre of the stator.

 

Rotor

The rotor of an AC motor, unlike that of a DC motor which uses a DC Circuit, is not connected to an external power source. It gets its strength from the stator. The rotor of a three-phase induction motor can be a squirrel cage or wrapped.

 

The mechanical load can be linked to the rotor, which is positioned on the motor's shaft. Rotors are divided into two categories: Squirrel Cage Rotor & Phase Wound Rotor.

 

If the motor has a squirrel cage rotor, it is referred to as a squirrel cage induction motor, and if it has a phase wound rotor, it is referred to as a phase wound induction motor.

 

Shaft

The shaft is the rotating part of the motor that connects the rotor to the load. The shaft is typically made of steel and it is supported by bearings at each end.

 

Bearings

The bearings support the shaft and allow it to rotate freely. The bearings are typically made of steel or bronze.

 

Enclosure

The enclosure protects the motor from the environment. The enclosure is typically made of metal or plastic.