One, what is an uninterruptible power supply
UPS (Uninterruptible Power System/Uninterruptible Power Supply), that is, the uninterruptible power supply, is the battery (mostly lead-acid maintenance-free batteries) and the host is connected to the host inverter through the host and other modular circuits will be converted into DC power system equipment. Converted into utility power system equipment. It is mainly used to provide stable and uninterrupted power supply to a single computer, computer network system or other power electronic equipment such as solenoid valves, pressure transmitters and so on. When the utility input is normal, the UPS will utility voltage regulator supplied to the load to use, at this time the UPS is an AC utility voltage regulator, but also to the battery charging; when the utility power interruption (accidental blackout), the UPS will immediately the battery's DC energy, through the inverter zero-switching method to the load to continue to supply 220V alternating current to enable the load to maintain normal operation and to protect the load software, hardware, not to be damaged. UPS equipment is usually able to provide protection against over-voltage or under-voltage.
The role of UPS
UPS has the following basic functions:
1. Grid voltage is normal, the utility voltage through the UPS voltage regulator supplied to the load to use, the performance of the UPS itself is a good AC voltage regulator, while improving the quality of the power supply; at the same time, it is also charging the batteries in the machine, storage of back-up energy.
2. Grid voltage abnormalities (undervoltage, overvoltage, power loss, interference, etc.) UPS inverter will be converted to AC battery DC power to maintain the power supply to the load.
3. The UPS switches between grid power and battery power on its own to ensure uninterrupted power supply to the load. And according to the precision of the equipment to choose the switching time to withstand.
Second, the characteristics of the uninterruptible power supply
UPS is for China's power grid environment and network monitoring and network systems, medical systems, such as the reliability of the power supply requirements, to overcome the centralized power supply of medium-sized and large-scale computer network systems caused by the increasingly harsh power supply grid environment, the third generation of the industrial frequency of the pure on-line intelligent UPS with the development of a new digital technology. dc power supply, is to maintain the formation of a steady current in the circuit and the battery power supply. DC power supply is a device that maintains a steady current in a circuit. Such as dry batteries, storage batteries, DC generators.
UPS and DC power supply is an important enterprise power supply protection equipment, traditional maintenance management includes: ① daily inspection of the appearance of the regular replacement of batteries, filter capacitors, fans and other wear parts, overhaul of the battery activation, etc.; ② transformation or use of replacement equipment, the use of high-level tools to test the battery performance. This management method of high investment costs, maintenance personnel workload, not easy to grasp the real-time operating status of the equipment and key data, equipment accident prevention capability is low. The implementation of online maintenance management can avoid the shortcomings of the traditional way, to obtain good benefits.
UPS in Chinese means "Uninterruptible Power Supply", is the English "Uninterruptible Power System/Uninterruptible Power Supply" abbreviation, it can protect the computer computer system. Abbreviation of "UninterruptiblePowerSystem/UninterruptiblePowerSupply", it can guarantee that the computer system will continue to work for a period of time after a power failure so that the user can save the disk in an emergency, so that the user does not affect the work of the power outage or loss of data.
Three, uninterruptible power supply purchase notes
1, first of all, to determine how powerful your equipment, generally speaking, the power of the ordinary PC or industrial computer in about 200W, Apple in about 300W, servers in the 300W and 600W, the power of the other equipment values can be referred to the device's manual.
2, the second should understand the UPS power rating there are two ways to express: apparent power (unit VA) and the actual output power (unit W), due to the presence of reactive power so caused by this difference, the two conversion relationship is: apparent power * power factor = actual output power.
3, UPS is usually divided into two types of industrial frequency machine and high frequency machine. Industrial frequency machine by silicon controlled SCR rectifier, IGBT inverter, bypass and industrial frequency step-up isolation transformer. Because of its rectifier and transformer operating frequency are industrial frequency 50Hz, as the name suggests, called industrial frequency UPS.
High-frequency machine is usually composed of IGBT high-frequency rectifier, battery converter, inverter and bypass, IGBT can be controlled by controlling the drive added to its gate to control the opening and closing of the IGBT, IGBT rectifier switching frequency is usually in the several K to dozens of KHz, or even up to Hundreds of KHz, relative to the 50Hz frequency, called high-frequency UPS.
Looking at the above introduction you must have an understanding of the UPS, uninterruptible power supply because of high efficiency, high reliability, high power, modular, green, energy saving, environmental protection and other characteristics, so it has a very good prospect for development, the current market demand is also expanding, the state has also promulgated a series of development policies and development plans to encourage the industry. Policies and development plans to encourage the development of the industry. On what is the intermittent power supply is introduced here, want to know more please continue to pay attention to Rilong learning to decorate it!