Uninterruptible Power Supply Function

As the power requirements of computer application systems become higher and higher, UPS has received increasing attention and has gradually developed into a power protection system with functions such as voltage stabilization, frequency stabilization, filtering, anti-electromagnetic and radio frequency interference, and anti-voltage surfing. Especially when the power grid line and power supply quality are not very high, the anti-interference technology is backward, and the computer system has relatively high requirements for power supply, the role of UPS becomes more obvious.
The protection function of Uninterruptible Power Supply(UPS) is first manifested in stabilizing the voltage of the mains power supply. The input voltage range of UPS is relatively wide, generally from 170V to 250V, and the quality of the output power supply is quite high. The output voltage of the backup UPS is 5%~8%, and the output frequency is stable at 1Hz; as shown in Figure 1, the output voltage of the online UPS is stable within 3%, and the output frequency is stable at 0.5Hz. When the mains power is normal, the UPS power supply is equivalent to an AC mains voltage stabilizer; at the same time, the mains power charges the battery, which is also equivalent to a charger. In the case of a sudden power failure of the mains, the UPS automatically switches to battery power supply to keep the computer working normally and protect the software and hardware from damage.