When the power grid works normally, one line of mains power is charged to the battery through the rectifier, and the other line of mains power is initially stabilized by an automatic voltage stabilizer, after absorbing part of the grid interference, it is directly provided to the user by the bypass transfer switch. At this moment, the battery is in a charging state, and after it is fully charged, it enters a floating charge state.
UPS can be regarded as a voltage stabilizer with relatively general voltage stabilization performance, which can improve the fluctuation of the mains voltage, but it has no effect on electrical pollution such as frequency instability and waveform distortion. When the grid voltage or grid frequency exceeds the UPS input range, that is, under abnormal conditions, the AC input is cut off, the charger no longer works, the battery discharges, and the inverter starts to work under the control of the control circuit to generate 220V , 50Hz alternating current, the UPS power supply system at this moment is converted to the inverter to supply power to the load. The inverter of the backup UPS is always in the state of backup power supply.
The above is the working principle of the backup uninterruptible power supply. Xindun is a company specializing in the production of UPS, inverters and other power products. If you have anything else you want to know, you can call us and we will provide you with free consultation.
