If you are expecting to buy an electric motor for your domestic or commercial use, it’s important to know what they, how they operate and the different types available.
An electric motor can best be described as a machine that converts electrical energy into mechanical energy. In simple terms, an electric motor acts as a crossing point or boundary between the electrical system and the mechanical regime of a facility.
This type of motor is a vital part of any electrical system. Electric motors are usually used in offices, manufacturing plants, and homes. They consume around 64 percent of all electricity produced.
There are various types of electric motors, and each motor has different working characteristics. Motor for various applications is often picked according to the features that they possess.
Basics of Electric Motors
Electric motors can be powered by either alternating current (AC) or by direct current(DC). A good example of alternative current could be power generators, and an example of a direct current could be car batteries.
Alternative Current (AC) Motor Parts
The basics elements for an alternative current (AC) include:
Enclosure- Consists of a bearing housing and a yoke or a frame. The enclosure holds the motor’s parts together and safeguards the interior parts of a motor from inhibitors and moisture.
Stator- This is the inactive area of the motor’s electromagnetic circuit. It is the electrical circuit that works like an electromagnet. The stator consists of two vital parts; the stator core and the stator windings.
Rotor- This is the rotating area of the electric motor’s electromagnetic circuit. A magnetic field from the stator creates a negative magnetic field onto the rotor forcing it to move away from the stator field.
Bearings- Bearings are usually used to support the rotor and enable it to move freely. There is a wide selection of bearings available on the market, and the type and size of the bearing used in a motor will depend on its load carrying capacity, in-relation to the load to be carried. Its lifespan and reliability is also a vital factor to consider.
Conduit box- This is a point of connection of the motor’s stator windings and the electrical power.
Eye bolt- The eye bolt is used to lift weighty electric motors with a crane or a hoist to prevent it from getting damaged.
Direct Current (DC) Motor Parts
Stator- This part is used for carrying the poles and filed winding. The rotor and the stator make the core or magnetic circuit of the motor.
Rotor- The rotor is used to carry the frame (armature) winding.
Armature winding- This part revolves in the magnetic field created at the field winding. An armature winding is a non-stop winding; this means that it has no start or end. It’s made up of some twists in series.
Commutator- The commutator revolves with the rotor and is responsible for rectifying the induced current and voltage in the armature winding.
Teeth/slot- Non-conducting teeth/slot liners are usually wedged between the teeth walls and the coils to provide mechanical support, protection from scratches and to provide further electrical insulation.