Cancellation of regulator output filter poles by second derivati

Details Cancellation of regulator output filter poles by second derivati Cancellation of regulator output filter poles by second derivati

1989-08-07

1990-06-26

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

049377213

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 are selected in accordance with a key aspect of the invention to eliminate the output filter from the characteristic equation of the power supply to thereby eliminate instability whatever its source.

REFERENCES:
patent: 3573597 (1971-04-01), Genvit
patent: 4045887 (1977-09-01), Nowell
patent: 4298924 (1981-11-01), Genvit
patent: 4323958 (1982-04-01), Nowell

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