Patent ID: 6552447
Filing Date: 2003-04-22
Classification: G03G,G06K,H02J,H04N

Abstract:
A power supplying apparatus comprising:a power supply circuit which transforms the AC voltage into a DC voltage; a motor which operates with the output voltage of the power supply circuit and continues rotation by inertia after the loss of the output voltage; at least one non-volatile memory which saves data; and a control unit which operates with the output voltage of the power supply circuit, operates with the generated voltage of the motor by the inertial rotation of the motor when the output voltage of the power supply circuit decreases, saves the data on said non-volatile memory when the output voltage from the power supply circuit decreases, and prohibits access to the non-volatile memory after saving the data, wherein the power supply circuit comprises a first transformer which transforms the AC voltage, a second transformer which transforms the AC voltage, a first rectifier circuit which rectifies the secondary voltage of the first transformer, a second rectifier circuit which rectifies the secondary voltage of the second transformer, a first smoothing capacitor which smoothes the output voltage of the first rectifier circuit, a second smoothing capacitor which smoothes the output voltage of the second rectifier circuit, a first voltage regulator which controls the voltage of the first smoothing capacitor at a constant level, and a second voltage regulator which controls the voltage of the second smoothing capacitor at a constant level, and the output voltage of the first voltage regulator is output as an operating voltage for the motor and the output voltage of the second voltage regulator is output as an operating voltage for the control unit.