Patent ID: 7514817
Filing Date: 2009-04-07
Classification: H02J,H02M,Y02B,Y02P

Abstract:
1. A converting device with power factor correcting (PFC) and dc/dc converting functions, comprising: a power source providing a dc voltage; an inverter having an input terminal electrically connected to said power source and an output terminal; a transformer having a primary winding electrically connected to said output terminal of said inverter and a secondary winding; a rectifier/filter circuit having an input terminal electrically connected to said secondary winding of said transformer and a first and a second output terminals; and a PFC converter coupled to said first and said second output terminals of said rectifier/filter circuit, having an input terminal receiving an ac input voltage and a first and a second output terminals, and comprising: a first diode having an anode electrically connected to said first output terminal of said rectifier/filter circuit and a cathode electrically connected to said first output terminal of said PFC converter; and a second diode having a cathode electrically connected to said second output terminal of said rectifier/filter circuit and an anode electrically connected to said second output terminal of said PFC converter, wherein said converting device converts said ac input voltage into an ac output voltage when said ac input voltage is normal, and converts said dc voltage to output said ac output voltage with a cooperation of said inverter, said transformer, said rectifier/filter circuit and said PFC converter and with a conduction of one of said first and said second diodes when said ac input voltage is abnormal.