Patent ID: 6326773
Filing Date: 2001-12-04
Classification: H02J,H02M,Y02E

Abstract:
A power conversion apparatus for adjusting a power inputted from a power system and outputting it to a load, comprising:power input terminal connected to a single-phase power system;power output terminal connected to a load;power conversion means, composed of semiconductor switches, for adjusting an input AC voltage inputted from said power input terminal to a voltage of the same phase and different amplitude relative to said input AC voltage and outputting an adjusted voltage;a filter for smoothing said adjusted voltage outputted from said power conversion means; anda transformer having a primary winding inputted with said adjusted voltage smoothed by said filter and having a secondary winding insulated with respect to said primary winding, wherein:said secondary winding of said transformer is connected in series between said power input terminal of said power system and said power output terminal,input side of said power conversion means is connected in parallel to said power input terminal of said power system, andoutput side of said power conversion means is connected through said filter to said primary winding of said transformer, wherein said connection of the secondary winding of said transformer in a polarity is registered so that said input AC voltage is lowered by adding an output voltage of said power conversion means outputted from the secondary winding of said transformer and the lowered voltage is provided to the output terminal.