| 摘要 |
Present invention discloses a switching power supply system which comprises; a first power supply (S1) at least one independently controllable second power supply (S2) wherein the system further comprises at least one auxiliary winding (T1a) on the first transformer (T1) of the first power supply (S1) for generating a higher voltage than an input voltage of a power input of the power supply system; a first rectification means (8a) allowing a first current to only pass from the power input of the power supply system to the power input of the second power supply (S2) and a second rectification means (8b) allowing current to pass only from the output of the auxiliary winding (T1a) to the power input of the second power supply (S2). Within the system of the invention, the power factor of the several power supplies can be corrected using a single power factor correction system. |
