Electric power conversion systems – Current conversion – Including an a.c.-d.c.-a.c. converter
Patent
1977-08-17
1978-11-28
Smith, Alfred E.
Electric power conversion systems
Current conversion
Including an a.c.-d.c.-a.c. converter
363101, 331113A, H02M 5458
Patent
active
041278933
ABSTRACT:
A highly efficient tuned oscillator ballast circuit especially suitable for a flourescent lamp load includes an oscillator circuit coupled to a pulsed DC potential source and having a tuned output circuit coupled to a load circuit, to a drive circuit for the oscillator which is dependent upon current flow in the load circuit and to a rectifier and charge storage and isolation and applying network coupled to the pulsed DC potential source and providing energy thereto whenever the potential decreases below a given reference level. A transient compensating circuit to protect the oscillator components from initial or "start-up" transients is also included.
REFERENCES:
patent: 3008068 (1961-11-01), Wilting et al.
patent: 3611021 (1971-10-01), Wallace
patent: 3723848 (1973-03-01), Miller
patent: 3754160 (1973-08-01), Jensen
patent: 3758841 (1973-09-01), Bourbeau
patent: 3889153 (1975-06-01), Pierce
patent: 4045711 (1977-08-01), Pitel
patent: 4075476 (1978-02-01), Pitel
Buffton Thomas H.
GTE Sylvania Incorporated
Roberts Charles F.
Smith Alfred E.
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