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2 Product Description
2. 3 Operating Principle
Figure 2-3 The UPS operating principle
1. Input filter: it filters the input and provides clean AC power to the UPS.
2. AC/DC converter: In Normal mode, it converts the AC input power to
regulated DC power, and raises the regulated DC voltage for DC/AC
converter.
3. DC/DC converter: Raises the DC Voltage from the battery system to the
optimum operating voltage for the inverter when the UPS operates in Battery
mode.
4. DC/AC inverter: In Normal mode, it utilizes the DC output of the AC/DC
converter and inverts it into precise, regulated sine wave AC
power. In
Battery mode, it receives energy from the battery through the DC/DC
converter.
5. Bypass: It is very important in the UPS system. In the event of a UPS fault
that will not lead to UPS shutdown, the load will be automatically
transferred to the bypass. Meanwhile, the LED indicators will indicate the