Electric power conversion systems – Current conversion – With means to introduce or eliminate frequency components
Patent
1989-08-31
1990-06-12
Salce, Patrick R.
Electric power conversion systems
Current conversion
With means to introduce or eliminate frequency components
363 48, 363 95, H02M 114
Patent
active
049338269
ABSTRACT:
Instability resulting from the presence of reactive components in the output filter of regulated power supplies of the general type in which regulation is obtained by feeding back the output voltage to the regulator circuitry is eliminated by deriving a feedback signal from the output voltage which includes not only a direct component, but also separately derived first and second derivative components referenced to the reactive characteristics of a series output choke and parallel output capacitor of the output filter circuit. The amplitude ratios of the feedback signal components and the elements of the local feedback loop of the regulator error amplifier are selected in accordance with key aspects of the invention to eliminate the output filter (including the effective series resistance of the output filter capacitor) from the characteristic equation of the power supply to thereby eliminate instability whatever its source.
REFERENCES:
patent: 3573597 (1971-04-01), Genuit
patent: 4045887 (1977-09-01), Nowell
patent: 4298924 (1981-11-01), Genuit
patent: 4323958 (1982-04-01), Nowell
Bull HN Information Systems Inc.
Phillips J. H.
Salce Patrick R.
Solakian J. S.
Sterrett Jeffrey
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