How Does An Uninterruptible Power Supply Work?

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

‌Normal power supply situation‌:

UPS converts alternating current (AC) into direct current (DC) through a rectifier and stores it in the battery. The rectifier has the function of controlling the output voltage according to the changes in external power, ensuring that the output voltage remains stable when the power supply fluctuates.

At the same time, DC power is also supplied to the inverter, which converts it into stable AC power and outputs it to the load equipment for use.

‌Power supply interruption situation‌:

Once the mains power is interrupted or abnormalities occur, such as excessive voltage fluctuations, unstable frequency, etc., the UPS will immediately start the inverter.

The inverter converts the DC power stored in the battery into AC power and continues to provide power support for the load equipment, ensuring the normal operation of the equipment and the security of the data.

‌Intelligent monitoring and switching‌:

UPS also has an intelligent monitoring function, which can monitor the power status in real time, including the voltage, frequency and other parameters of the mains power.
When the mains power returns to normal, the UPS will intelligently switch back to the mains power supply mode and continue to charge the battery pack for use when the mains power is abnormal next time.

In addition, UPS devices usually provide protection against overvoltage or undervoltage, ensuring that the load equipment can operate stably even when the power fluctuates.

In summary, the uninterruptible power supply UPS provides a stable and uninterrupted power supply to the load equipment through its built-in battery and inverter, as well as intelligent monitoring and switching functions.