UPS (Uninterruptible Power Supply): what they are, what they do and how they are made
An uninterruptable power supply (UPS also said, from English Uninterruptible Power Supply) is a device used to maintain constantly electrically powered in alternating current electrical appliances. It becomes necessary where the electrical equipment may in no case remain without power (eg in public places such as hospitals, power plants etc. ..) a disservice by not creating more or less severe. It is very useful especially in countries where they produce regular and frequent blackouts.
Building technology
Basically it is a device consisting of at least three main parts: a first converter AC / DC (AC converter) which, thanks to a rectifier and a filter, converts the alternating voltage of the electrical network in DC voltage, a battery or more accumulator batteries in which is stored the energy provided by the first inverter and a second inverter DC / AC (AC converter) that draws power from the rectifier or from the battery in case of lack of power supply, provides power to the connected load.