ELECTRIC MOTOR

ELECTRIC MOTOR 

Electric motors are rotating electrical machines that convert electrical energy into mechanical energy. Due to its many advantages, which include its economy, cleanliness, comfort and reliability, the electric motor has largely replaced other sources of energy both in industry and in transport, mining, trade or home. 

Electric motors meet a wide range of service needs, from start, accelerate, move, or slow up and stop holding a charge. These engines are available in powers ranging from a small fraction to several thousand horse, and a wide variety of speeds, which can be fixed, adjustable or variable. 

An electric motor has a much smaller number of mechanical parts that an internal combustion engine or a steam engine, making it less prone to failures. Electric motors are the most agile of all in regard to power variation and can go instantly from the rest position to the operating to the fullest. Its size is smaller and can develop systems to drive the wheels from a single motor, as in automobiles. 

The downside is that batteries are the only electricity storage systems, and bulky. Also, when spent, takes hours to recharge before you can run again, while in the case of an internal combustion engine enough to just fill the fuel tank. This problem is solved, the railroad, holding a wire above the track, which is connected to plants generating electricity. The engine gets the power cable through a metal part called skate. Thus, electricity storage systems are not needed. 

- When it is not possible or not profitable to build power line to find a solution to energy storage systems are used in combinations, include the use of an internal combustion engine or a steam engine connected to a electric generator 

http://www.portalplanetasedna.com.ar/motor_electrico.html

• Electric Motor 

An electric motor is a rotating device that transforms electrical energy into mechanical energy. In different circumstances has many advantages over combustion engines 

A similar size and weight are lower. You can build any size. It has a high torque and, depending on the motor constant. Its performance is very high (typically around 80%, increasing the same as increasing the power of the machine). The vast majority of electric motors are reversible machines can operate as generators, converting mechanical energy into electricity. 

Parts of a Motor 

Start by looking at the overall design of a simple DC electric motor 2 poles. A simple motor has 6 parts, as shown in the diagram: 

An armature or rotor. 

A switch. 

Brushes. 

A shaft. 

A magnet field. 

A DC power source of some kind.

http://www.enreparaciones.com/electricidad/motor_elect.php

Depending on the nature of the power transformer, electric motors are classified as DC motors, also called direct AC motors, which, in turn, are grouped according to their operating system, induction motors, motors synchronous motors and the collector. Both groups have all the elements common to electromagnetic rotating machines.

An electric motor is a machine with an indescribable variety of utilities. In principle an electric motor is used to convert electrical energy into mechanical energy. Two interrelated physical principles underlying the operation of the engines. The first is the principle of induction discovered by British scientist and inventor Michael Faraday in 1831. If a conductor moves through a magnetic field, or if located in the vicinity of a fixed driving circuit can vary the intensity of which is established or a current is induced in the conductor. The principle opposed to this was observed in 1820 by French physicist André Marie Ampère. If a current passed through a conductor within a magnetic field, the mechanical force exerted on the conductor. 

An electric motor can operate in any mounting position and environments of all types: wet, corrosive gas with suspended solids (dust, sawdust, etc.). It has small size and is easy to install and operate. Its operation is safe and uniform, with a relatively low initial cost, high performance and low operating cost.
http://html.rincondelvago.com/motor-electrico_2.html