How An Uninterruptible Power Supply Works

The working principle of Uninterruptible Power Supply(UPS) mainly depends on its built-in battery and inverter.

Specifically, the working principle of UPS can be summarized as the following steps:

When the mains power is normal:

UPS converts alternating current (AC) into direct current (DC) through a rectifier and stores it in the battery. At this time, UPS is equivalent to an efficient AC voltage regulator, providing the load with stabilized mains power and charging the internal battery at the same time.

When the mains power is interrupted or the voltage fluctuates:

UPS will immediately start the inverter to convert the stored DC power into AC power, continue to provide stable power support to the load, ensure the normal operation of the load equipment, and protect its software and hardware from damage.

In addition, UPS equipment usually has the function of protecting against over-high or under-voltage, and can monitor the power status in real time to ensure the stable operation of the system.

The main components of UPS include rectifiers, batteries, inverters and static switches. These components work together to enable UPS to provide stable and uninterrupted power supply to critical loads when power is interrupted or voltage fluctuates.