UPS, also known as uninterruptible power supply, is a device that includes an energy storage device, and uses an inverter as the main component to provide a constant voltage and constant frequency uninterruptible power supply. It is mainly used in occasions with strict requirements on power supply to provide uninterrupted power supply for equipment. When the mains supply is normal, the UPS will stabilize the mains to supply power to the load. At this time, the UPS is an AC mains voltage stabilizer, and it charges the internal battery at the same time; when the mains is interrupted or the power is cut off due to unexpected conditions, the UPS will immediately Start operation, through the internal inverter module, the electric energy in the battery is converted into 220V or 380V AC power for the equipment to continue to operate, which ensures the normal operation of the equipment, and also protects the load from damage to the internal hardware due to unexpected power failure.
The inverter converts DC power (battery, storage battery) into AC power (usually 220v50HZ sine or square wave). Simply speaking, inverter is a device that converts direct current (DC) into alternating current (AC). It consists of inverter bridge, control logic and filter circuit.