Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Reexamination Certificate
2006-07-11
2006-07-11
Han, Jessica (Department: 2838)
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
C363S021130, C363S097000
Reexamination Certificate
active
07075801
ABSTRACT:
What is provided is a direct-current converter which improves unstableness of operations owing to an error of a bottom detection circuit and fluctuations of a detection point which are caused by disturbance. The direct-current converter includes a bottom detection circuit13which detects a minimum voltage of a main switch Q1after an auxiliary switch Q2is switched off, an ideal gate signal generation circuit21which generates an ideal gate signal for switching on the main switch Q1at a time of the minimum voltage of the main switch Q1based on an output of the bottom detection circuit13, a comparison circuit22which calculates an error output between the ideal gate signal generated by the ideal gate signal generation circuit21and an actual gate signal which switches on the main switch Q1, and a first delay circuit14which controls a delay of an ON time of the main switch Q1by the actual gate signal based on the error output of the comparison circuit22, thereby performing control to make the actual gate signal approach the ideal gate signal.
REFERENCES:
patent: 5841643 (1998-11-01), Schenkel
patent: 6466462 (2002-10-01), Nishiyama et al.
patent: 6594161 (2003-07-01), Jansen et al.
patent: 07-203688 (1995-08-01), None
patent: 09-182429 (1997-07-01), None
patent: 2000-092829 (2000-03-01), None
patent: 2002-199719 (2002-07-01), None
patent: 2002-345240 (2002-11-01), None
Han Jessica
Holmes Brenda O.
Kilpatrick & Stockton LLP
Sanken Electric Co. Ltd.
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