lastro de intensidade de luz para operar pelo menos uma lâmpada fluorescente e metodo de energização de pelo uma lâmpada fluorescente
A dimmable ballast and methods are presented in which the operating frequency of a self-oscillating inverter is controlled according to a sensed lamp current for dimming control or cathode heating, and an AC bus voltage of the inverter is controlled to be at or below a voltage threshold value to pre...
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| Format: | Patent |
| Sprache: | por |
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| Zusammenfassung: | A dimmable ballast and methods are presented in which the operating frequency of a self-oscillating inverter is controlled according to a sensed lamp current for dimming control or cathode heating, and an AC bus voltage of the inverter is controlled to be at or below a voltage threshold value to prevent over driving operating lamps when one or more lamps are being replaced. |
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