Switched-mode power supply with low loss interrupted oscillation

Details Switched-mode power supply with low loss interrupted oscillation Switched-mode power supply with low loss interrupted oscillation

1989-05-04

1990-05-15

Salce, Patrick R.

Electric power conversion systems

Current conversion

Including d.c.-a.c.-d.c. converter

323323, H02M 3335

Patent

active

049263048

ABSTRACT:
A switched-mode power supply circuit for converting a DC input voltage into a DC output voltage comprises a series arrangement of a controllable power switch and an inductive element coupled between the input voltage terminals. Control means are provided for rendering the power switch alternately conducting and non-conducting and a rectifier is coupled to the inductive element for making the output voltage available. The inductive element and a capacitor coupled thereto form a part of a resonant circuit in which a voltage oscillation is present in the time periods when the switch and the rectifier are currentless. The circuit further comprises means for interrupting the oscillation present in the resonant circuit at an instant when the voltage across the inductive element or the current through the capacitor is substantially zero. In one embodiment, the dissipation in the circuit is reduced and the circuit is synchronized.

REFERENCES:
patent: Re32155 (1986-05-01), Nilssen
patent: 3641422 (1972-02-01), Farnsworth et al.
patent: 4441146 (1984-04-01), Vinciarelli
patent: 4451876 (1984-05-01), Ogata
patent: 4466051 (1984-08-01), Fitzgerald
patent: 4524411 (1985-06-01), Willis
patent: 4595977 (1986-06-01), von der Ohe
patent: 4607319 (1986-08-01), Assow et al.
patent: 4694385 (1987-09-01), Marinus

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