Switching power supply apparatus

Details Switching power supply apparatus Switching power supply apparatus

2004-11-30

2008-08-19

Sterrett, Jeffrey L. (Department: 2838)

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

C363S097000, C363S131000

Reexamination Certificate

active

07414864

ABSTRACT:
A switching power supply apparatus includes a first inductor that is serially connected to a primary winding of a transformer, and a second inductor that is arranged so as to apply a voltage of a capacitor with sine waves obtained by rectifying an AC input voltage for an on-period of a first switching circuit. A diode for preventing the inverse current to the second inductor and a capacitor that is charged by excitation energy charged to the second inductor and applies a voltage to the primary winding for on-period of the first switching circuit. Further, a capacitor is arranged so that the inductor, the primary winding, and a second switching circuit define a closed loop. Switching control circuits control the on-period of a first switching element to control an output voltage Vo, and further control an input voltage Vi by controlling the on-period of a second switching element.

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Official Communication dated Aug. 3, 2005, issued in the corresponding Japanese PCT Application No. PCT/JP2004/017745.
Official communication issued in the counterpart Chinese Application No. 200480006784.3, mailed on Aug. 17, 2007.
Official communication issued in the counterpart Chinese Application No. 200480006784.3, mailed on Feb. 1, 2008.

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