The frequency of the square wave is controlled by output control circuits attached to the ballasts little electronic cerebral cortexthe mother board. High frequency electronic ballasts 12 fluorescent ballasts electronic standard electronic for t8 and t12 instant or rapid start fluorescent lamps and for 39 watt, 40 watt, and 50 watt t5 rapid start long twin tube lamps reliable and energyefficient, advances broad line of standard electronic ballasts for t8, t12. Electronic high frequency fluorescent ballasts past, present and future based upon the years of development and manufacture as well as a documented three and onehalf year life test the reliability of the electronic high frequency ballast concept has. When the ballast is properly grounded, the leakage current does not constitute a hazard. Now filtered dc voltage is fed to the high frequency oscillation stage where oscillation is typically square wave and frequency range are from 20 khz to 80 khz.
Pdf high power density electronic ballast for hid lamps. Pdf files of specifier reports and several searchable databases. The square wave frequency is not referenced to the line hertz rate. Whitenoise modulation of highfrequency highintensity. Osram and sylvania have merged into a new company named osram sylvania inc. After that, filtration of this dc voltage is done by using capacitor configuration. With an highfrequency ballast the arc is far more likely to be sustained. Singlestage high powerfactor electronic ballast with complex frequency modulation for hid lamps. It is desirable to combine the advantages of small size and weight of electronic ballasts.
Common electronic ballasts convert 60hz line voltage into a much higher frequency. High power factor sound rated a high frequency electronic ballasts programmed start, normal light output series advance, 10275 west higgins road, rosemont, il 60018. Pdf analysis and design method for highfrequency self. Simple control circuits for electronic ballast design. This paper presents the analyzed, design and implementation of some high frequency electronic ballast for metal halide lamps. Ballast basics modern electronic ballasts operate at a frequency above 20,000 hz. The high output frequency of an electronic ballast refreshes the phosphors in a. Ballast design a 26w electronic ballast circuit without pfc is designed around the irs2526ds mini8 ballast control ic. An electrical ballast is a device placed in series with a load to limit the amount of current in an.
Ballasts shall be a high frequency electronic type, and operate lamps at a frequency above 20 khz. The high output frequency of an electronic ballast refreshes the phosphors in a fluorescent. Twolamp t8 electronic ballasts also are available but result in lower system efficacies. An electronic ballast will convert power frequency to a very high frequency to. It does this through the principle of electrical gas discharge. Electronic ballasts lighting research center rensselaer. Electronic high frequency ballasts are now standard equipment for most fluorescent sources. High frequency electronic ballasts 112 advance part no.
Singlestage highpowerfactor electronic ballast with complex frequency modulation for hid lamps. Analysis and design method for highfrequency selfoscillating electronic ballasts conference paper pdf available in ieee transactions on industry applications 476. Introduction highfrequency electronic ballasts for fluorescent lighting systems, also called. High frequency electronic ballast provides line frequency. High frequency electronic ballasts programmed start, normal light output series advance, 10275 west higgins road, rosemont, il 60018. Extensive experiments using resonant type electronic ballast have been. Now filtered dc voltage is fed to the highfrequency oscillation stage where oscillation is typically square wave and frequency range are from 20 khz to 80 khz. The functions performed by present day electronic ballasts include electromagnetic interference emi filtering to block ballast generated noise, rectification, power factor correction pfc, a halfbridge resonant output stage for high frequency ac control of the lamp, and a control circuit for controlling each of the stages figure 1. This revolutionary development was originally designed and introduced by advance, and today this class p device is a requirement of the national.
The primary advantage of highfrequency fluorescent lighting is the improvement of efficacy,as also reducing lamp flicker that is sometimes. Guide to specifying highfrequency electronic ballasts. This means an electronic ballast will correct for a generator which is slightly off speed. A ballast for a fluorescent lamp has two primary functions. Pdf singlestage highpowerfactor electronic ballast with. Pdf an electronic ballast with high power factor for compact. Starting the metal of a fluorescent fixture is a starting aid when prop. Class p ballast protection tp suffix are equipped with a thermally actuated automatic reclosing protective device. Ballast type light output setting lamp type input current % thd %thc2 rqm2s40tp conventional magnetic 100% ballast factor is 0. Ge ballasts 347v high efficiency instant start ballasts ge lighting. Answers lighting research center rensselaer polytechnic institute. Carefully balanced design elements combine to provide an efficient and inviting high. Pitel, senior member, ieee abstractin this paper, a new method is proposed to avoid acousticresonancerelated instabilities in metal halide lamps when operated with a highfrequency electronic ballast.
This topology is an extension for the boost converter merged with the. The national lighting product information program nlpip prepared this guide to specifying highfrequency electronic. Electronic ballasts usually supply power to the lamp at a frequency of 20,000 hz or higher, rather than the mains frequency of 50 60 hz. Behaviour of a highintensity discharge lamp fed by a highfrequency dimmable electronic ballast. Modern solidstate circuitry makes the electronic ballast practical, reliable and. Pdf this paper introduces a new low cost, high power factor electronic ballast for.