Electric motors

Electric motor is a tool to convert electrical energy into mechanical energy. The instrument works on the other hand, changing mechanical energy into electrical energy is called the generator or dynamo. Electric motors can be found in household appliances such as fans, washing machines, water pumps and vacuum cleaners.
Electric motors commonly used in the industry is asynchronous electric motor, with the two global standards of IEC and NEMA. Asynchronous motor based IEC metric (millimeters), while the NEMA electric motors based imperial (inch), the application is the unit of power in horsepower (hp) or kilowatt (kW).
IEC electric motors are divided into several classes according to efficiency gains, as standard in the EU, this class division became EFF1, EFF2 and EFF3. Electric motors EFF1 is the most efficient, least waste of energy, while EFF3 was not permitted within the EU, because wasting fuel in power stations and will automatically cause the most carbon emissions, so it is more polluting.
Applicable standard is IEC IEC 34-1, this is a standard governing the electric-powered rotating equipment. There are lots of electric motor manufacturers, but only some actually follow the directions IEC 34-1 and following directions from the EU-level efficiency.
Many manufacturers of electric motors do not follow IEC standards and the EU so that their products become cheaper and more were sold, many developing countries manjdi market for these products, which in the long-term users of financial waste, because the electric bill higher and higher every year.
Institutions that regulate and ensure the efficiency level is CEMEP, a European consortium, founded by the factories of leading electric motors, in order to save the environment by reducing carbon pollution globally, because a lot of wasted power in the use of electrical load.
For example, in an average industrial electricity consumption for electric motors is about 65-70% of the total cost of electricity, so using an efficient electric motor that will reduce overhead costs of production, thus raising product competitiveness, especially with the increase in electricity tariff every year , then the use of electric motors is time EFF1 becomes necessary.
[edit] The principle of electric motors work



The principle of electric motors work
In the electric motor electric power converted into mechanical energy. This change is done by converting electricity into magnetism known as electro-magnets. As we know that: the poles of the namesake magnet will repel the poles and not namesake, of attraction. So we can get the movement if we put a magnet on a shaft that can spin, and another magnet in a fixed position.