Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Reexamination Certificate
2006-10-03
2006-10-03
Vu, Bao Q. (Department: 2838)
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
C363S056080, C363S134000
Reexamination Certificate
active
07116565
ABSTRACT:
An over-power protection apparatus for self-excited power converter comprises a soft-start unit, an adjusting unit and a timing unit. A PWM unit of the self-excited power converter generates a switching signal in response to a compensating signal of the soft-start unit to control the output power of the self-excited power converter. The soft-start unit couples to the adjusting unit. The adjusting unit drives the soft-start unit and the PWM unit for modulating the switching signal to reduce the pulse width of the switching signal and the output power of the self-excited power converter once the short-circuit and over-load are happened at the output of the self-excited power converter. In the meantime, a timing unit starts to count. The timing unit drives the self-excited power converter to stop supplying the power source after the counting and the over-power lasting for a period of time.
REFERENCES:
patent: 5910709 (1999-06-01), Stevanovic et al.
patent: 6259615 (2001-07-01), Lin
patent: 6954364 (2005-10-01), Min
patent: 7042740 (2006-05-01), Morimoto et al.
Rosenberg , Klein & Lee
System General Corp.
Vu Bao Q.
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