منابع مشابه
Zinc and sodium high pressure lamps for curing composite resins.
Polymerisation characteristics of conventional units for curing composite resins are insufficient considering handling feasibilities particularly in the premolar and molar region. There is also hazardous ocular effect of near ultra-violet part of visible spectra. Sodium high pressure lamp technology has been applied to develop a new high pressure zinc lamp, which is for the first time used for ...
متن کاملVegetative Growth of Potato under High- pressure Sodium, High-pressure Sodium SON-Agro, and Metal Halide Lamps
Potato (Solanum tuberosum L. cvs. Norland and Denali) plants were grown under high-pressure sodium (HPS), metal halide (MH), and blue-light-enhanced SON-Agro high-pressure sodium (HPS-S) lamps to study the effects of lamp spectral quality on vegetative growth. All plants were initiated from in vitro nodal cultures and grown hydroponically for 35 days at 300 μmol•m–2•s–1 photosynthetic photon fl...
متن کاملHigh Power Factor Electronic Ballast for High Pressure Sodium Lamps With Low Crest Factor
In this paper will be reported the study and implementation of a single stage High Power Factor (HPF) electronic ballast for High Pressure Sodium (HPS) lamps using a Half-Bridge Boost Rectifier integrated with an Electronic Ballast based in a LCC filter. In the recent years many authors are working to obtain single stage HPF electronic ballast for fluorescent lamps [1-3]. Normally to obtain HPF...
متن کاملBreakdown characteristics of high pressure xenon lamps
An investigation of the breakdown of high intensity discharge (HID) lamps filled with xenon at pressures from 0.1 to 5 bar is presented. Three power supplies were used in order to provide voltage rates of increase covering about four orders of magnitude from 5 mV ns−1 to 100 V ns−1, the latter being typical for electronic ballasts driving commercial HID lamps. Customized lamps ensure a volume b...
متن کاملA Low Cost Single Stage Electronic Ballast Family For High Pressure Sodium Lamps
In the recent years many authors [1-4] are working to obtain single stage HPF electronic ballast for fluorescent and HID lamps to obtain cost reduction and to comply with international standard requirements. Usually to obtain HPF in electronic ballast for high pressure sodium lamps a Power Factor Preregulator (PFP) is used between the mains and the electronic ballast [5]. In this paper will be ...
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ژورنال
عنوان ژورنال: JOURNAL OF THE ILLUMINATING ENGINEERING INSTITUTE OF JAPAN
سال: 1978
ISSN: 0019-2341,1349-838X,2185-1506
DOI: 10.2150/jieij1917.62.2_83