Study of high frequency & low frequency electronic ballasts for HID lamps /
Advantages of high frequency electronic ballast for HID lamps
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| Format: | Thesis eBook |
| Language: | English |
| Published: |
[Place of publication not identified] :
[publisher not identified] ;
1997.
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| Subjects: | |
| Online Access: | Link to OAKTrust copy |
| Summary: | Advantages of high frequency electronic ballast for HID lamps and experiment results pronounce that the variation of the ballast. Operating the lamp at low frequency virtually challenge. The acoustic resonance occurs when the sound wave complex and expensive ballast circuitry. This thesis detection method based on []R variation is developed. The different manufactures and a lamp acoustic resonance difficult to find. Lamp power spectrum spreading is another eliminates acoustic resonance, however result in a more enclosed gases is resonant with the imposed high frequency exchange by elastic collisions between charged particles and experiments are conducted on 7OW metal halide lamps from frequency ballasting of HID lamps have been a major good indicator for the occurrence of acoustic resonance. The High-intensity discharge (HID) lamp electronic ballasting is include: increased efficacy, ease in starting, good color input power. The periodic input power and subsequent energy inside the inner arc tube specified by the tube shape and the instability in the arc and generate unpleasant light flicker. knowledge of resonant free zones becomes mandatory and is lamp impedance ([]R) presents the best sensitivity and is a Lamp properties, such as geometry, type of gas filling, etc., lamps. Experimental results are discussed to illustrate measuring lamp electrical parameters. Theoretical analysis neutral gas are source to pressure perturbations which cause of acoustic resonances over a wide frequency range, high- on real-time detection of acoustic resonance occurrence by operating on low frequency (switched DC) type electronic operation is one way to avoid acoustic resonance. The performance. proposed method is independent of lamp operating power and proposes a lower component count switched DC ballast for HID receiving increasing attention in the recent years as low rendering, small size, etc. However, due to the occurrence second part of this thesis presents the study of HID lamp that determine the occurrence of acoustic resonance are known the frequency modulation method employed. Extensive to vary with manufacturing tolerances. Tuned high-frequency wattage HID lighting systems are finding indoor applications. way known to avoid acoustic resonances. This thesis focuses |
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| Item Description: | "Major subject: Electrical Engineering". In title, symbol for "and" is used. Vita. |
| Physical Description: | xiii, 89 leaves : illustrations ; 28 cm. Also available online. Issued also on microfiche from Lange Micrographics. |
| Bibliography: | Includes bibliographical references: pages 85-88. |