Self-regulating electronic ballast system

Electric lamp and discharge devices: systems – Periodic switch in the supply circuit – Impedance or current regulator in the supply circuit

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Details

315278, 315DIG7, H05B 3702

Patent

active

045874611

ABSTRACT:
This invention provides for a self-regulating electronic ballast system (10) which includes a power source (12) for actuating at least one gas discharge tube (66). The self-regulating electronic ballast system (10) includes a filter circuit (11) connected to the power source (12) for maintaining a substantially smooth direct current voltage signal as well as for suppressing harmonic frequencies generated by the electronic ballast system (10). Induction circuitry (15) is coupled to the filter circuit (11) and includes a tapped primary winding (42) for generating a voltage across the gas discharge tube (66) responsive to a regulated current. A switching network (13) which is feedback coupled to the induction circuitry (15) establishes the regulated current and the switching network (13) includes a regulation control circuit (17) for maintaining the power output of the gas discharge tube (66) at a predetermined and substantially constant value.

REFERENCES:
patent: 3619713 (1971-11-01), Biega
patent: 4075476 (1978-02-01), Pitel
patent: 4259616 (1981-03-01), Smith
patent: 4277726 (1981-07-01), Burke
patent: 4353009 (1982-10-01), Knoll

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