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Through a high - frequency pulse width modulator, the phase of input current
waveform and voltage waveform becomes the same and gets an input power factor that is higher than 95%. When the
commercial power is normal , it passes through AC-DC circuit and gets DC BUS DC voltage, then via inverter, the DC BUS
turns into 220V AC output, finally, the power supply that all the loads applied is a kind of pure sine wave power supply that
has proceeded voltage regulation, frequency stabilization and noise filtering. By means of using superior IGBT for power
inverting element that shows high frequency switching character, the working frequency of UPS inverter can reach tens of
thousands hertz, which not only improves inverter working efficiency , but also improves the whole UPS machine working
efficiency , meanwhile , the improvement of inversion frequency can be good for reducing noise of inverter, therefore,
you just place the HBG series UPS in the computer room, it will not disturb your work.