Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Reexamination Certificate
2006-08-08
2006-08-08
Sterrett, Jeffrey (Department: 2838)
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
C363S037000, C363S044000
Reexamination Certificate
active
07088596
ABSTRACT:
The present invention is to provide a switching power supply device for preventing the change of characteristic of the line filter due to filler such as resin which covers the circuits. A switching power supply device is disclosed which comprise a rectifier1for full wave rectification of the input of the utility power supply, a condenser2for smoothing the output of the rectifier1, a line filter3consisting of a first coil3awhich is connected in series to a high voltage side output of the rectifier1and a second coil3bwhich is connected in series to a low voltage side output of the rectifier1via the condenser2, a condenser4for smoothing the output of the line filter3, a series circuit of a primary winding5aof a transformer5which is connected in parallel to the condenser4and a switching element6, a diode7for half-wave rectification of the output of a secondary winding5bof the transformer5, and a condenser8connected between output terminals of the secondary winding5bvia the diode7, wherein a diode10ais connected in a forward direction from an input of the second coil3bof the line filter3to an output of the first coil3aof the line filter3.
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Iwao Seiichi
Katsura Yoshinori
Yamashita Mikihiro
Matsushita Electric & Works Ltd.
Sterrett Jeffrey
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