What is the role of UPS uninterruptible power supply?

Understand UPS uninterruptible power supply -module power sharing UPS uninterruptible power supply combined with new power technology, UPS uninterruptible power supply module power supply, the internal resistance of each power supply module is slightly different, and the output voltage may not be completely the same. Down Shank UPS briefly introduces the module power sharing of UPS uninterruptible power supply.

What is the role of UPS uninterruptible power supply?

1. Output impedance method, also known as droop method, tilt method, voltage regulation method. This is achieved by adjusting the internal resistance of the output of the power supply. The characteristic of this method is simplicity. But the biggest disadvantage is the poor voltage regulation.

2. Master-slave setting method, artificially select a master module among the parallel modules, and the output of other modules is closer to this module. The biggest problem is that if the main module fails, the entire power system will not work.

3. The average current automatic current sharing method. After the current sampling of each module is amplified, it is connected to the common current sharing bus through a resistor. Everyone can adjust and complete the current sharing according to the average voltage on the current sharing bus. The average current automatic current sharing method can achieve accurate current sharing, but if the current sharing busbar is short-circuited or a certain module fails, the voltage drop of the busbar will cause the voltage of each module to be reduced.

4. The maximum current automatic current sharing method, also known as automatic master-slave current sharing and democratic current sharing. Among all parallel modules, the module with the largest output current automatically becomes the main module, and the output of other modules is closer to this module.

5. There are many other methods, such as automatic thermal current sharing, current sharing with external current sharing controller and so on.

Work may also be divided into two levels of busy and busy, or overloaded work may occur, the loss of heat is more severe, which will reduce the UPS uninterruptible power supply life. In idle time, the work is lighter than the load. Stopping the work without fully entering the working state is also harmful to the power supply itself. UPS uninterruptible power supply is like our energy, reasonable maintenance is important!