The inverter is a current conversion device that converts DC power into alternating current or converts AC power to direct current.
UPS is an uninterruptible power supply
device, the principle is the battery + inverter, the utility power conversion through the inverter to DC, DC battery charging, if the utility power, immediately converted to the battery converted to AC by the inverter , Can be used directly for electrical appliances.
Here also mentioned a word "regulator" regulator through the regulator device, can make the unstable mains to maintain a fixed voltage, which is very good for the normal use of electrical appliances.
Civil use, the regulator is used in a wide range, such as refrigerators, air conditioners, there are many users in the total line to install high-power regulator, so that all electrical appliances are protected. We know that in particular, after the power failure and recovery, the voltage will have an overload peak, the instantaneous voltage is too high, which is the reason for the majority of electrical damage.
UPS power supply for such a computer such as an unexpected power outage may cause data loss of electrical appliances, such appliances generally 1 second downtime caused by the loss of data will be lost, UPS can be used to protect the power supply, such as server, mobile Unicom signal transmission Tower and so on.
Some of the requirements are not too high equipment will also use some backup power supply system, such as emergency exit, the reaction is slightly slower, there are 10 seconds to use the backup engine power supply, but also the use of batteries. For example, the power plant with its own electricity system, equipped with millions of spare diesel units worth, all day warm, once an unexpected power outage, to ensure that more than ten or several seconds to restore power supply.
But the inverter because it is only a current conversion device, rarely used alone, a typical example is the car power supply. It takes 12 volts from the car cigarette lighter, converted to 220 AC, for the exchange Electrical appliances, such as laptops.