Apparatus for converting DC to DC having non-feed back variable

Details Apparatus for converting DC to DC having non-feed back variable Apparatus for converting DC to DC having non-feed back variable

1987-06-23

1990-05-29

Beha, Jr., William H.

Electricity: power supply or regulation systems

In shunt with source or load

Using choke and switch across source

323285, 323286, H02M 3156

Patent

active

049298828

ABSTRACT:
An hysteretic current-mode controlled DC to DC converter has an input voltage, an output voltage and a control switch. The switch alternately coupled the input voltage into an energy storage inductor. It is controlled by an hysteretic conparater sensing the current of the inductor and having turn-on and turn-off limits. The limits are symmetrical about an average inductor current. The limits are adjusted by simple non-closed-loop methods to maintain an approximately constant frequency of oscillation. The average inductor current is controlled by an error amplifier to maintain a constant output voltage. The two controls are independent.

REFERENCES:
patent: 3294981 (1966-12-01), Bose
patent: 4311954 (1982-01-01), Capel
patent: 4392103 (1983-07-01), O'Sullivan et al.
patent: 4437146 (1984-03-01), Carpenter
patent: 4529927 (1985-07-01), O'Sullivan et al.
patent: 4761725 (1988-08-01), Henze
Weischedel "An Application of Frequency Entrainment in a DC-to-DC Converter", IEEE Trans. on Ind. Appl., vol. IA-8, No. 4, pp. 437-442, (Jul./Aug. 1972).
T. Szepesi, "Stabilizing the Frequency of Hysteretic Current-Mode DC/DC Converters", IEEE Trans. on Power Electr., vol. PE-2, No. 4, pp. 302-312, Oct. 1987.

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