Let you learn more about UPS

UPS is an uninterruptible power supply . It is a system device that connects storage batteries (mostly lead-acid maintenance-free storage batteries) to the host and converts DC power to mains power through module circuits such as the host inverter. It is mainly used to provide a stable, uninterrupted power supply to a single computer, computer network system or other power electronic equipment such as solenoid valves, pressure transmitters, etc. When the mains power input is normal, the UPS supplies the mains voltage to the load after being regulated. At this time, the UPS is an AC mains voltage regulator, and it also charges the battery inside the machine. When the mains power is interrupted (accidental power failure) At this time, the UPS immediately supplies the DC power from the battery to the load through the inverter's zero-switching method to continue to supply 220V AC power, so that the load can maintain normal operation and protect the software and hardware of the load from damage. UPS equipment usually provides protection against over-voltage or under-voltage.

Sunk UPS is aimed at the reliability requirements of power grids in China's power grid environment, network monitoring, network systems, and medical systems. It overcomes the increasingly severe power grid environment caused by centralized power supply of medium and large computer network systems. The third generation of power frequency pure online intelligent UPS has been developed. A DC power supply is a device that maintains a constant current in the circuit. Such as dry batteries, storage batteries, DC generators, etc.

UPS and DC power supply are important power supply guarantee equipments for enterprises. Traditional maintenance management includes: ① daily inspection of appearance, regular replacement of wearing parts such as batteries, filter capacitors, fans, etc., and battery activation during overhaul; , Use advanced tools to test battery performance. With this management method, the enterprise has high investment costs, a large workload of maintenance personnel, it is not easy to grasp the equipment operation status and key data in real time, and the equipment accident prevention capability is low. The implementation of online maintenance management can avoid the deficiencies of traditional methods and obtain good benefits.

The Chinese meaning of UPS is "Uninterruptible Power Supply", which is the abbreviation of "Uninterruptible Power System / Uninterruptible Power Supply" in English. It can guarantee that the computer system will continue to work for a period of time after a power outage to enable users to save the disk urgently, so that users will not be affected by the power outage. Affect work or lose data.

UPS uninterruptible power supply system consists of five parts: main circuit, bypass, battery and other power input circuits, AC / DC converter rectifier (REC), DC / AC converter inverter (INV), inverter and bypass Output switching circuit and energy storage battery. The voltage stabilization function of its system is usually completed by a rectifier. The rectifier uses thyristor or high-frequency switching rectifier. It has the function of controlling the output amplitude according to the change of external power. When the external power changes (the change should meet the system (Required), the rectified voltage with substantially constant output amplitude. The purification function is completed by the energy storage battery. Because the rectifier cannot eliminate the instantaneous pulse interference, the rectified voltage still has interference pulses. In addition to the function of storing direct-current energy, the energy storage battery is just like a large container capacitor connected to the rectifier. Its equivalent capacitance is proportional to the capacity of the energy storage battery. Because the voltage across the capacitor cannot be abruptly changed, the smoothing characteristic of the capacitor on the pulse is used to eliminate the pulse interference, which plays a purification function, also called shielding against interference. The frequency stability is completed by the converter, and the frequency stability depends on the stability of the converter's oscillation frequency. In order to facilitate the daily operation and maintenance of the UPS power system, switch controls such as the system work switch, the automatic bypass switch after the host self-test failure, and the maintenance bypass switch are designed.

When the grid voltage works normally, power the load as shown in Figure 1-1, and charge the energy storage battery at the same time; when the power fails suddenly, the UPS power supply starts to work, and the energy storage battery supplies the load with the required power to maintain normal Production (such as thick black → shown); when the load is severely overloaded due to production needs, the grid voltage directly supplies power to the load through rectification (as shown by the dotted line).