Electronic ballast for high-intensity discharge lamps

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United States of America Patent

PATENT NO 5923128
SERIAL NO

08838440

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Abstract

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An electronic ballast is used for providing a voltage with a varying frequency to fluorescent lamps. The electronic ballast has an inverter to supply a fluorescent lamp load with a voltage having a high frequency, with the inverter being controlled by a control which generates a switching signal. The ballast further includes a triangular current wave generator which provides a triangular waveform that modulates the frequency of the switching signal controlling the inverter. The modulation of the switching signal causes the frequency of voltage supplied to the fluorescent lamp load to vary from the resonant frequency of the circuit.

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Patent Owner(s)

Patent OwnerAddress
ABB SCHWEIZ AG5400 BADEN

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Canova, Antonio Montevarchi, IT 22 161

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