Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1987-04-01
1988-08-09
Beha, Jr., William H.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 49, 363 56, H02M 3335, H02H 7122
Patent
active
047632380
ABSTRACT:
A protection device for switch mode power supplies includes a main switch controlled by the output signals of a flip-flop. The flip-flop input receives regulation control signals. A first protection circuit supplies priority signals with respect to the regulation signals on the reset input of the flip-flop. The protection device also includes a cycle detector of the first protection circuit, a memory for accumulating at each cycle a value proportional to the duration between a signal of the detector and the set signal associated with the regulation cycle of the following cycle, and inhibiting of the flip-flop when the memory has accumulated a signal higher than a predetermined threshold.
REFERENCES:
patent: 3733540 (1973-05-01), Hawkins
patent: 4288831 (1981-09-01), Dolikian
patent: 4330816 (1982-05-01), Imazeki et al.
patent: 4476427 (1984-10-01), Kaneko et al.
Electronic Components and Applications, vol. 2, No. 1, Nov. 1979, pp. 31-48, Eindhoven, NL; H. Houkes: "TDA1060--A Comprehensive Integrated Control Circuit for SMPS".
"Thomson-CSF"
Beha Jr. William H.
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