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    UPS Topic Four: Knowledge of UPS Principle


    Today, we will lead you to know the UPS principle.

     

    From the basic principle of application, UPS is a kind of power protection device which contains energy storage device, inverter as main component and steady frequency output of voltage stabilizing. Mainly the rectifier, battery, inverter and static switches and other components.

     

    1. Rectifier: Rectifier is a rectifier device, to convert AC to DC . It has two main functions: firstly, to convert AC to DC, after filtering to supply the load or inverter; secondly, charging the battery. Therefore, it also plays a role of a charger;

     

    2. Inverter: inverter is a device that converts DC to AC. It consists of the inverter bridge, control logic and filter circuit.

     

    3. Battery: battery is a storing electrical energy device,, which is made up of several batteries,  It’s capacity determines the time of backup. It’s main function: firstly, when the grid mains normal, the electrical energy conversion into chemical energy stored inside the battery. 2, when the main failure , conversion of chemical energy to electricity to provide inverter or load;

     

    4. Static switch: Static switch is a non-contact switch, Divided into two types of conversion and model.



    UPS is composed of a set of AC + DC charging + AC/DC inverter device. In general, small and medium backup UPS rely on batteries to maintain power supply time around 10~30min.


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