We use electric energy more than hundred times in our day to day routine. Turning on any device without thinking anything is our nature. This electric energy is basically electromagnetic energy. Much of that electricity is supply by electromechanical devices, such as the electrical generators used by hydroelectric power plants or wind turbines. Electrical power can also be generate by chemical or photoelectric means, such as by using batteries or solar energy. Depending upon the type of electrical power needed, one or more methods of electric power generation may be use.
Advantages of Electromagnetic Energy
One of the prominent benefit of depending upon the electromechanical device used, you don’t need an external electrical source to generate electrical power. One example of this is an alternating-current (AC) generator. When rotational mechanical energy turns a coil inside of the generator, it exposes that coil to changes in magnetic field. Those changes induce the production of alternating current voltage – voltage where the current changes directions with a certain frequency – between the two output ends of the coil. Since no other energy is required other than the mechanical motion of the rotating coil, this type of device can be advantageous in situations where there is a ready source of mechanical energy, such as a steam or gas turbine.
One more advantage of using an electromagnetic energy source is that you can generate either AC or direct-current (DC) electrical power. As noted before, an AC generator uses changing magnetic fields to create AC electrical power. A DC generator operates in a similar fashion; however, it requires a few extra pieces to convert AC electrical power to DC. Many DC motors and generators use a device called a commutator to convert the alternating current that comes out of the power generator into current that flows in only one direction, or direct current.
Electromagnetic energy power sources may not be as useful, or can perhaps be dangerous to use, under certain circumstances. For instance, if you need to have a power source that must have a regulate current output. Both AC and DC power generators would need to be run at a non-varying speed. Further, while a DC power generator produces electrical current that flows in one direction, the electrical current is irregular. To regulate the current produced by a DC generator, you would need additional electrical equipment, such as a battery, a capacitor and an inductor. As well as electronic components called diodes to ensure that the current stays within a regulated range.
Generators use electromagnetic fields to produce electricity. These fields can be dangerous to some people who use sensitive medical equipment, such as pacemakers. These same electromagnetic fields can also interfere with other electrical and electronic devices, such as cell phones and computers. The electrical energy generation process also produces heat. Therefore, it would be best not to use a generator around items or in.