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A 250W HIGH PRESSURE SODIUM LAMP HIGH POWER FACTOR ELECTRONIC BALLAST USING AN AC CHOPPER
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| Author(s) |
SINCERO Geraldo; FRANCIOSI Andre; PERIN Arnaldo |
| Abstract |
A novel high pressure sodium lamp (HPS) electronic ballast topology with high power factor (HPF) is presented. Instead of using a power factor correction (PFC) stage, an ac chopper is capable of achieving a HPF and of supplying high frequency current to the lamp. Due to its output characteristic the lamp current presents a low frequency modulation at the voltage source frequency and the consequences of this operation are discussed. Afterwards, different converter topologies, bi-directional switches and modulation strategies for the ac-ac converter are presented. Finally, experimental results of a prototype for 250W HPS lamps are discussed. |
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| Filename: | 0171 |
| Filesize: | 584.2 KB |
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| Type |
Members Only |
| Date |
Last modified 2006-02-05 by System |
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