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HPS ELECTRONIC BALLAST WITH MODULATION INDEX CONTROL
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| Author(s) |
Lenin MORAIS, Pedro DONOSO-GARCIA, Seleme SELEME JR, Porfirio CORTIZO |
| Abstract |
Acoustic resonance in HPS lamps can be avoided by using a controlled PWM inverter and third harmonic injection. The crest factor can also be reduced by harmonic injection. This paper proposes to use of the modulation index adjustment as a method of eliminating the transformer at the output of the ballast as well as maintaining the lamp nominal power during its lifetime. An ignitor for high-intensity discharge lamps based on forced oscillation via an external periodic voltage square wave supplied by a digitally controlled inverter is also presented. |
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| Filename: | 0108-epe2009-full-23590178.pdf |
| Filesize: | 468 KB |
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| Type |
Members Only |
| Date |
Last modified 2010-01-27 by System |
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