Patent ID: 7345857
Filing Date: 2008-03-18
Classification: H02H,H02M

Abstract:
1. A power supply with surge voltage control functions, comprising: a rectifying unit to rectify a voltage of an AC power source externally applied; a fuse resistor to input and apply the AC power source to the rectifying unit, and to cut off the voltage of the AC power source exceeding a predetermined AC value; a pulse generation unit driven by an output voltage of the rectifying unit, and to generate a pulse having a predetermined period; a transformer driven by the pulse, and to induce a predetermined ac voltage; and a surge voltage control unit turning on by the ac voltage induced by the transformer to form a first current path between the AC power source and the rectifying unit via the surge voltage control unit, wherein a second current path is formed between the AC power source and the rectifying unit via the fuse resistor when the output voltage of the rectifying unit exceeds a predetermined DC value.