Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Reexamination Certificate
2007-03-06
2007-03-06
Riley, Shawn (Department: 2838)
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
C363S056110, C363S040000
Reexamination Certificate
active
10555256
ABSTRACT:
A switching power source apparatus has a series circuit connected to both ends of a DC power source Vdc1and having a reactor L3, a primary winding5aof a transformer T, and a switch Q1, a series circuit connected to both ends of the primary winding and having an auxiliary switch Q2and a clamp capacitor C3, a saturable reactor SL1connected in parallel with the primary winding, a rectifying-smoothing circuit D1, D2, L1, C4for rectifying and smoothing a voltage generated on a secondary winding5b, and a control circuit10for alternately turning on/off the switches Q1and Q2and turning off the switch Q2if a current of the switch Q2increases due to saturation of the saturable reactor SL1. The reactor L3is made of leakage inductance between the primary and secondary windings. In the transformer T, the primary winding is divided into two sections that are connected in series, the secondary winding is arranged between the two sections of the primary winding, and the numbers of turns of the two sections of the primary winding are adjusted to adjust the leakage inductance to saturate the saturable reactor SL1.
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patent: 6466462 (2002-10-01), Nishiyama et al.
patent: 6856522 (2005-02-01), Wittenbreder, Jr.
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patent: 2002-199719 (2002-07-01), None
patent: 2004-48965 (2004-02-01), None
Kilpatrick & Stockton LLP
Riley Shawn
Sanken Electric Co. Ltd.
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