The rectifier can be made of vacuum tube, pilot tube, solid silRectifier (English: rectifier) is a device that converts alternating current into direct current, which can be used for power supply devices and detection of radio signals. icon semiconductor diode, mercury arc, etc. On the contrary, a device that converts direct current into alternating current is called an "inverter."
In the standby UPS, only the battery needs to be charged, and the load is not required to supply power, so there is only a charger. In a double-conversion UPS, this device not only supplies power to the inverter, but also charges the battery, so it is called a rectifier/charger.
A rectifier is a rectifier device, simply put it is a device that converts alternating current (AC) into direct current (DC). It has two main functions: first, it converts alternating current (AC) into direct current (DC), which is filtered and supplied to the load or to the inverter; second, it provides charging voltage to the battery. Therefore, it also acts as a charger at the same time.
In order to reduce the possibility of device damage due to overvoltage breakdown and improve the reliability of the rectifier device, a silicon avalanche rectifier can be used. In this kind of device, when the reverse voltage exceeds the allowable peak value, uniform avalanche breakdown occurs across the entire PN junction. The device can work under high voltage and high current, so it can withstand considerable reverse surge power. When manufacturing this kind of device, it is required to have few material defects, uniform resistivity, smooth junction surface, and proper protection of the exposed junction area to avoid surface breakdown. The selenium rectifier has a large anti-overload capacity and a strong ability to withstand reverse surge power.
In the two basic types of rectifiers based on high-power diodes or thyristors, the high-voltage AC power of the grid is converted into DC power through the rectifier. Mention other types of rectifiers in the future (near or distant): choppers, chopper DC/DC converters, or current source inverter active rectifiers based on leading-edge products of uncontrollable diodes. Obviously, this latest type of rectifier technology contains more content to be developed, but it can show advantages, for example, it is loaded on the power grid with very small harmonic interference and a power factor of 1