Patent ID: 6225708
Filing Date: 2001-05-01
Classification: G06F,H02J,H02M

Abstract:
An uninterruptable power supply for feeding power from a normal power supply as a first power supply to a first load to be operated within a defined DC voltage range comprising:a power supply unit, having an output connected to the first load, for converting a voltage of the normal power supply to a first DC voltage within the defined DC voltage range and for outputting the same;a first voltage converter, having an input connected to a second power supply and an output connected to the first load, for converting an output voltage of the second power supply to a second DC voltage within the defined DC voltage range and lower than the first DC voltage and for outputting the same; andwherein if a characteristic of the normal power supply is deviated from a defined value, said uninterruptable power supply is operative to continue feeding power from the second power supply in place of the first power supply to the first load.