What's the SCR rectifier for UPS?
UPS is for the Chinese grid environment and network monitoring and network system, medical system requirements for the reliability of power supply, power supply environment, overcome in the large-scale computer network system of the power supply caused by the increasingly severe problem, based on digital technology new developed third OEM frequency on-line intelligent UPS net. A DC power supply is a device that maintains a steady current in a circuit. Such as dry batteries, batteries, DC generators, etc..
UPS Chinese means "ups", "Uninterruptible Power System/Uninterruptible Power is the English abbreviation Supply", it can protect the computer system to continue to work for a period of time after a power outage in order to enable users to save users from the emergency, and the impact of the work due to power failure or loss of data.
UPS power supply system consists of five parts: input to the main road, bypass, battery power supply circuit, rectifier AC/DC transform (REC), inverter DC/AC transform (INV), and the inverter output bypass switching circuit and a storage battery. The regulator function system is usually done by the rectifier, rectifier SCR or high-frequency switch rectifier itself can be according to the change of electric control output amplitude function, so when external power is changed (the change should meet the requirements of the system), the rectifier output voltage amplitude unchanged. The purification function is completed by the energy storage battery, because the rectifier can not eliminate the instantaneous pulse interference, and the rectified voltage still has interference pulse. In addition to the function of DC direct energy storage, the energy storage battery is like a large container capacitor to the rectifier, and its equivalent capacitance is proportional to the capacity of the storage battery. Because the voltage at both ends of the capacitor can not be mutated, that is to use the smooth pulse characteristics of the capacitor to eliminate pulse interference, and play a cleaning function, also known as interference shielding. The frequency stability is achieved by the converter, and the frequency stability depends on the stability of the oscillation frequency of the converter. In order to facilitate the daily operation and maintenance of the UPS power supply system, the system work switch, the main engine self checking, the automatic bypass switch after the fault, the bypass switch and other switch control are designed.
UPS (Uninterruptible Power System/Uninterruptible Power Supply), namely, uninterruptible power supply, the battery is (for maintenance free lead-acid batteries) connected with the host, the host through the inverter module circuit of the direct current into power system equipment. The utility model is mainly used for providing stable and uninterrupted power supply for a single computer, a computer network system or other power electronic equipment, such as an electromagnetic valve, a pressure transmitter, etc.. When the power input is normal, UPS electric voltage supplied to the load, the UPS is an AC power regulator, it is also the built-in battery; when the power interruption (outage), UPS immediately DC battery energy conversion method by zero switching inverter continue to supply 220V AC power to the load, the load to maintain normal working load and protection of software and hardware is not damaged. UPS devices are usually protected against high voltage or low voltage.
UPS and DC power supply enterprises is an important power supply protecting device, the traditional maintenance management includes: daily inspection appearance, regular replacement of batteries, filter capacitor, fan wearing parts, overhaul battery activation; the modification or replacement of equipment by using advanced tools, test battery performance. This kind of management means high cost of investment and heavy workload of maintenance personnel. It is difficult to grasp the equipment running state and key data in real time, and the accident prevention ability of equipment is low. The implementation of online maintenance management can avoid the shortcomings of the traditional way, and get good results.
