Direct drive ballast with starting circuit

Details Direct drive ballast with starting circuit Direct drive ballast with starting circuit

1979-02-23

1980-02-12

Smith, Alfred E.

Electric power conversion systems

Current conversion

With starting arrangement

363 97, 363 37, 315205, 315220, 315224, 315DIG5, 315DIG7, 331113A, H02M 5458, H05B 4136

Patent

active

041886615

ABSTRACT:
An electronic ballast circuit includes a direct drive high frequency inverter circuit with a tuned output circuit and a drive circuit dependent upon current flow in a load circuit. The high frequency inverter circuit is coupled to a DC potential source which is derived from a pulsed DC potential source by way of a charge storage and charge isolating circuit. An oscillator provides a starting capability for the high frequency inverter circuit and is essentially removed from the active circuitry upon energization of the high frequency inverter circuit.

REFERENCES:
patent: 4104715 (1978-08-01), Lawson
patent: 4109307 (1978-08-01), Knoll
patent: 4127795 (1978-11-01), Knoll
patent: 4127893 (1978-11-01), Goepel

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