Electronic ballast with overvoltage monitoring
AssigneeTridonicAtco GmbH & Co. KG
InventorChristian Soehnel
Life of this patent
Estimating the term…
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.
Claims12
An electronic ballast for at least one gas discharge lamp, said ballast comprising:
- a rectifier circuit connected to a supply voltage source;
- a smoothing circuit connected to an output of the rectifier circuit for generating an intermediate circuit voltage;
- an inverter, arranged to be fed with the intermediate circuit voltage, an output of which is connected to a terminal of a load circuit containing a lamp;
- and
- a control circuit including an overvoltage monitoring device, the overvoltage monitoring device being configured to monitor the supply voltage delivered to the load circuit and, in the event that said supply voltage exceeds a predetermined nominal value, to initiate an optical or acoustical warning signal.
Dependencies are inferred from the claim text.