Electric Motors in Pakistan

Electric Motors Construction

The electric motor construction can be done using the rotor, bearings, stator, air gap, windings, commutator, etc.

Rotor

The rotor in an electric motor is the moving part, and the main function of this is to rotate the shaft for generating the mechanical power. Generally, the rotor includes conductors which are laid to carry currents, and communicate with the magnetic field in the stator.

Bearings

The bearings in the motor mainly give support to the rotor to activate its axis. The shaft of the motor expands with the help of the bearings to the load of the motor. As the load forces are used outside of the bearing, then the load is known as overhung.

Stator

The stator in the motor is the inactive part of the electromagnetic circuit. It includes permanent magnets or windings. The stator can be built with different thin metal sheets which are known as laminations. These are mainly used for reducing energy losses.

Air gap

The air gap is the space among the stator and the rotor. The effect of the air gap mainly depends on the gap. It is the major source for the low power factor of the motor. Once the air gap increases between the stator & rotor then magnetizing current also increases. Because of this reason, the air gap should be less.

Windings

Windings in the motors are wires that are laid inside of the coils, generally covered around a flexible iron magnetic core so as to make magnetic poles while energized with the current. For motor windings, copper is the most frequently used material. Copper is the most common material for windings and aluminum is also used although that should be solid to carry a similar electrical load securely.

Commutator

The commutator is a half ring in the motor which is fabricated with copper. The main function of this is to link the brushes toward the coil. The commutator rings are used to ensure the flow of current direction within the coil reverses each half time thus one surface of the coil is frequently pushed upwards & the other surface of the coil is pushed downwards.

Supplier of Electric Motors in Pakistan 

Working of Electric Motors

Basically, most of electric motors work on the electromagnetic induction principle, however, there are different types of motors which uses other electromechanical methods namely piezoelectric effect and electrostatic force.

The basic working principle of electromagnetic motors can depend on the mechanical energy that works on the conductor using the flow of electric current & it is placed within the magnetic field. The mechanical force direction is perpendicular toward the magnetic field and the conductor and the magnetic field