Electronic ballast with overvoltage monitoring

Details Electronic ballast with overvoltage monitoring Electronic ballast with overvoltage monitoring

2006-06-27

2006-06-27

Tran, Thuy Vinh (Department: 2821)

Electric lamp and discharge devices: systems

Current and/or voltage regulation

Automatic regulation

C315S129000

Reexamination Certificate

active

07067994

ABSTRACT:
An electronic ballast for at least one gas discharge lamp (LA), preferably for a fluorescent tube, having a rectifier circuit (2) connectable to a supply voltage source, a smoothing circuit (3) connected to the output of the rectifier circuit (2) for generating an intermediate circuit voltage (UZ), and an inverter (4), fed with the intermediate circuit voltage (UZ), to the output of which a terminal for the load circuit (5) containing the lamp (LA) is connected, and an overvoltage monitoring device which monitors the supply voltage (U0) delivered to the electronic ballast, whereby in the event that the supply voltage exceeds a predetermined nominal value (Ui,max), an optically or acoustically perceptible warning signal is issued.

REFERENCES:
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patent: 5122726 (1992-06-01), Elliott et al.
patent: 5446342 (1995-08-01), Nilssen
patent: 5563477 (1996-10-01), Ribarich et al.
patent: 6400095 (2002-06-01), Primisser et al.
patent: 10013279 (2001-09-01), None
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patent: 0677982 (1995-10-01), None
patent: 402164223 (1990-06-01), None
patent: WO 98/47324 (1998-10-01), None
patent: WO 00/69044 (2000-11-01), None

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