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Electric Motors Explained

by Armando Balocco

Devices that generate mechanical energy by using an electrical current are referred to as electric motors. Typically, they use magnetic fields and electrical conductors to accomplish their task. The process works in reverse, too - mechanical energy can be transformed into electricity.

Machines with a diverse range of purposes incorporate electric motors. They include power tools, blowers, home appliances, computer hard drives, home repair tools, pumps, and industrial and home-use fans, to name just a few.

An electric motor is usually powered by an external alternating current (AC) or direct current (DC) power source. That current isn't useful unless a motor converts it into a form of energy that's capable of performing work.

In most situations, generating electrical energy isn't useful without an additional step. Mechanical energy, on the other hand, can accomplish a wide variety of tasks. It's mechanical energy that allows you to unscrew an object, dig a hole in the ground, or perform any number of other manual tasks.

A scientific principle called Ampere's Force Law controls the relationship between electricity and magnetic fields. Discovered in 1820, this principle governs the physics behind electric motors. Under Ampere's Force Law, an electrical current interacting with a magnetic field is able to generate mechanical force.

AC

In 1882, Nikolai Tesla discovered the AC version of electric motors. AC is an acronym that stands for "alternating current." Tesla also called his discovery a "rotating magnetic field." There are two main parts of an AC motor: the "stator" and the rotor. The stator is stationary and has coils that receive the alternating current, which then generates a rotating magnetic field. The rotor, attached to the AC motor by a shaft, derives its power from this rotating magnetic field. This power can be used by power tools and other machines as mechanical energy to accomplish a variety of tasks.

DC Power

Direct current ("DC") is a different type of electrical energy. DC electric motors produce usable mechanical energy by converting DC electric energy. Many DC electric motors, often called "brush motors," use a stationary magnet as the stator and a rotating armature as the rotor. The armature in this setup rotates because the stationary magnets in the stator repel and attract it, depending on its position.

Electric Motor Repairs

It's important to know exactly what you're doing when you're trying to make electric motor repairs. Because electric motors are designed to be used with electricity, it could be a dangerous situation if electric motor repairs aren't done correctly. To avoid a potential shock or even electrocution, have your electric motor repairs performed by a trained service repairman unless you've been properly trained to do them yourself.



Armando Balocco is Director of Delba Electrical, a large electrical manufacturer located in the East Rand, South Africa. They are an <a href="http://delba.co.za">Electric Motor Supplier</a> and provide <a href="http://www.delba.co.za/mv_hv_machine_repairs.html">Electric Motor Repairs</a>.. This article, <a href="http://www.uberarticles.com/home.php?id=1738979&p=58778">Electric Motors Explained</a> has free reprint rights.


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New Unique Article!

Title: Electric Motors Explained
Author: Armando Balocco
Email: ian@syzygy-seo.co.za
Keywords: electric motor, dc motor, ac motor, stator, armature winding,electric motor, electrical engineering, electricity, ac, dc
Word Count: 442
Category: Sales
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