High frequency transformerless electronics ballast using double inductor-capacitor resonant power conversion for gas discharge lamps
Patent
·
OSTI ID:131958
A novel high frequency LCLC double resonant electronic ballast has been developed for gas discharge lamp applications. The ballast consists of a half-bridge inverter which switches at zero voltage crossing and an LCLC resonant circuit which converts a low ac voltage to a high ac voltage. The LCLC resonant circuit has two LC stages. The first LC stage produces a high voltage before the lamp is ignited. The second LC stage limits lamp current with the circuit inductance after the lamp is ignited. In another embodiment a filament power supply is provided for soft start up and for dimming the lamp. The filament power supply is a secondary of the second resonant inductor. 27 figs.
- Assignee:
- Electric Power Research Inst., Palo Alto, CA (United States)
- Patent Number(s):
- US 5,426,350/A/
- Application Number:
- PAN: 8-154,762
- OSTI ID:
- 131958
- Country of Publication:
- United States
- Language:
- English
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