With the continuous development of electronic technology, the quality requirements of the power supply system is also rising, due to the impact of public power for their own reasons, as well as the nature of lightning, the electricity, can not meet customer requirements for high-precision, high-reliability power quality. This produces an uninterruptible power supply for the UPS. So how much do you know about UPS, let's introduce it in detail below.
1. What is UPS?
UPS is the abbreviation of UninterruptiblePowerSystem. That is, an uninterruptible power supply system. When the mains power is input normally, the UPS will supply the mains with stabilized power supply to the load. At the same time, the internal battery is charged and the energy is stored in the battery. When the mains power is interrupted or the input is faulty, the UPS will immediately charge the internal battery Converted to 220V AC power to continue to be used by the load, so that the load maintains normal work and protects the load soft, hardware is not damaged.
2. Why use UPS?
In China, with the rapid development of information technology, computer applications are becoming more and more popular, and computers have an increasing impact on our work and daily life. People are increasingly relying on information technology, and the exchange, transmission and storage of information need to have A good power supply quality, otherwise it will directly affect the normal use of communication equipment, and even shorten its service life. In view of the above problems, the UPS can provide continuous, stable, and pure AC sine wave power to the load to avoid accidents such as data loss and errors, equipment damage or runaway crashes, and stop working.
3. Scope of application of UPS:
UPS can not only be used directly on the computer, any equipment equipped with a computer can use UPS. For precision load equipment, such as computer networks of financial systems, trading computers of securities companies, microwave communication equipment, ground satellite stations, satellite launch centers, medical instruments, industrial control instruments, radar stations, military communication systems, and program-controlled telephone systems , Surgical operating room, national defense military base, etc. should use UPS for power supply improvement and protection. In addition, office equipment, such as fax machines, copiers, printers, safety and escape equipment, and other valuable equipment and work environments that do not allow power outages, can use UPS as power quality improvement and power outage protection, so you have no worries.
4. , UPS classification:
UPS uninterruptible power supply is an electronic power supply equipment that integrates digital and analog circuits, power electronics technology, microprocessor control, computer communication, high-precision detection technology and automatic control principles.
According to technical standards, there are three main categories: backup UPS, quasi-online UPS, and online UPS.
Backup UPS (Offline): When the mains power supply is normal, the mains power is sent to the user load through the AC bypass channel and then through the transfer switch. In the early backup UPS, this AC bypass channel was actually a wire. In recent years, the backup UPS is often equipped with a simple AC voltage regulator circuit using a transformer plug voltage regulator. When the mains is abnormal, it will switch to battery power supply state. Features: 1. When the mains power is normal, the UPS outputs the mains power directly to the load without any processing, and the mains noise, poor surge attenuation ability; 2. With conversion time; 3. Simple structure, small size, light weight 2. Easy control and low cost; 4. Lowest protection.
Quasi-Online UPS (Online Interactive): When the mains input is normal, the UPS inverter is working in reverse to charge the battery pack, and when the mains is abnormal, the inverter will switch to the inverter to convert the battery pack voltage For AC output. Features: 1. With bidirectional converter design, UPS battery recharge time is shorter; 2. With conversion time; 3. The control structure is complex and the cost is higher; 4. The protection is between online and backup UPS, For mains noise, the surge attenuation ability is poor.
Online: When the mains is powered, the UPS first filters and rectifies the alternating current to direct current, and the inverter converts the direct current into the sine wave AC power required by the equipment. The transformer is converted into sinusoidal AC power to supply the load. Features: 1. The power output to the load is processed by the UPS, the output power quality is the highest; 2. No conversion time; 3. The structure is complex, the cost is higher; 4. The highest protection, the mains noise, the ability to suppress the surge good.
According to the capacity, UPS can be divided into three types: small UPS (below 10KVA), medium UPS (10KVA-60KVA), and large UPS (above 60KVA).
The above is the relevant knowledge of UPS uninterruptible power supply, do you all know it?
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