Electric power conversion systems – Current conversion – Including d.c.-a.c.-d.c. converter
Patent
1984-04-30
1986-10-07
Wong, Peter S.
Electric power conversion systems
Current conversion
Including d.c.-a.c.-d.c. converter
363 56, 363 97, H02M 3335
Patent
active
046163018
ABSTRACT:
A switching power supply for converting an input voltage to a different output voltage includes a power switch for producing a sequence of pulses from the input voltage, an output filter for filtering said pulses and for producing an output voltage from the filtered pulses, and means for sensing the output voltage and for controlling the value of the output voltage to a specified value. The power supply includes means for responding to a reduction in the input voltage beneath a normal value and for increasing the duty cycle of the sequence of pulses from the power switch in response thereto. Structure is provided for automatically controlling the frequency of the sequence of pulses to a selected value and for overriding the automatic control of this frequency so as to decrease this frequency in the event the load connected to the power supply draws too much current. Circuitry is provided to minimize off time in each period of the pulse sequence under "brown-out" conditions.
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patent: 4276586 (1981-06-01), Boekhorst
patent: 4445167 (1984-04-01), Okado
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patent: 4456949 (1984-06-01), Incledon
patent: 4459651 (1984-07-01), Fenter
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Voltage Regulator Data Book, Texas Instruments, 1983, pp. (2-93)-(2-100).
Holland, "Modelling Analysis and Compensation of the Current-Mode Converter", Proceedings of Powercon II, Apr. 1984.
Deisch, "Simple Switching Control Method Changes Power Converter into a Current Source", IEEE Power Electronics Specialist Conference, 1978.
Spencer, "Designing Switching Voltage Regulators with TL 494", Texas Instruments Application Report, CA-198.
Boschert Inc.
Caserza Steven F.
Jones Judson H.
Leeds Kenneth E.
MacPherson Alan H.
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