Electric power conversion systems – Current conversion – With condition responsive means to control the output...
Reexamination Certificate
2010-04-15
2010-12-14
Sterrett, Jeffrey L (Department: 2838)
Electric power conversion systems
Current conversion
With condition responsive means to control the output...
C363S098000, C323S283000
Reexamination Certificate
active
07852647
ABSTRACT:
A switching power supply apparatus includes a transformer or an inductor, a switching element connected to the transformer or the inductor and configured to perform switching of an input power supply, and a switching control circuit including a digital control circuit configured to sample voltage values and/or current values and control on and off of the switching element in accordance with the voltage values and/or current values. The number of points of sampling is set to n or more points, where n is an integer greater than 3, in an ON period of the switching element except at around a turn-on point or a turn-off point of the switching element. The presence or absence of magnetic saturation of the transformer or the inductor is detected on the basis of whether or not a slope of change in current value over time is larger than a predetermined value, and circuit operation is protected from the effect of magnetic saturation. Thus, the presence or absence of magnetic saturation can be rapidly and precisely detected without the influence of switching noise.
REFERENCES:
patent: 4748550 (1988-05-01), Okado
patent: 7315159 (2008-01-01), Nagai
patent: 2007/0085521 (2007-04-01), Nagai
patent: 64-027786 (1989-01-01), None
patent: 1-129772 (1989-05-01), None
patent: 2001-275364 (2001-10-01), None
patent: 2004-297943 (2004-10-01), None
patent: 2005-20927 (2005-01-01), None
patent: 2005-312139 (2005-11-01), None
Official Communication issued in International Patent Application No. PCT/JP2008/065260, mailed on Nov. 25, 2008.
Hara Takashi
Nishiyama Takayoshi
Ueki Koichi
Keating & Bennett LLP
Murata Manufacturing Co. Ltd.
Sterrett Jeffrey L
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