Визначення електричних характеристик високоінтенсивних джерел світла в аномальних режимах роботи та запобігання їх виникненню

Abstract

АНОТАЦІЇ Паздрій І. Р. Визначення електричних характеристик високоінтенсивних джерел світла в аномальних режимах роботи та запобігання їх виникненню. –Рукопис. Дисертація на здобуття наукового ступеня кандидата технічних наук за спеціальністю 05.09.07 – світлотехніка та джерела світла. – Харківська державна академія міського господарства. – Харків, 2000.Дисертація присвячена визначенню електричних характеристик високоінтенсивних джерел світла в аномальних режимах роботи, розробці методів запобігання виникнення аномальних струмів у процесі розгоряння РЛВТ, зокрема МГЛ. У роботі досліджений процес розгоряння РЛВТ, встановлені причини виникнення аномальних режимів роботи, показані можливі шляхи усунення зазначених режимів роботи, на основі математичних моделей високоінтенсивних джерел світла зроблено розрахунок та експериментально підтверджено найефективніші співвідношення параметрів елементів електричного кола з РЛ. Запропонований метод, запобігання виникненню аномальних режимів роботи в процесі розгоряння МГЛ, який дозволяє повністю усунути аномальні струми, а також, регулювати потужність лампи. На основі запропонованого методу розроблена принципова електрична схема гібридного пускорегулювального апарату та висвітлений принцип її роботи. Ключові слова: джерело світла, математична модель, металогалогенна лампа, пускорегулювальний аппарат. Pazdry I. R. Determination of electric characteristics high intensive light sources in anomalous work modes and averting of its appearance. – Manuscript.Thesis for a candidate’s degree of enganeering by speciality 05.09.07 – lighting engineering and sources of light. – Kharkov State Municipal Academy. – Kharkov, 2000. Dissertation is devoted to determination of high intensive light sources characteristics, especially MHL, in anomalous work modes. It is shown, that clamp embarrassments and lighting of high intensive LS are conditioned by two electrode burner construction, low emissive cathodes characteristics, presence in ballast matters eider, which contribute to formation of electronegative ions. Introduced experimental office researches of MHL hours give a possibility to affirm about presence of anomalous currents. For determination of possible removal methods of anomalous currents a process of their forming is considered. Based on experimental office researches of MHL work, one can make a conclusion, that during the period of lighting MHL is an initiator of apperance in circle of transitional processes, the currents of which causes the satiation of mandrel of ballast throttle, and the inductive throttle resistance essentially diminishes. That's why a ballast throttle in circle with RL loses ability to function as a current restrictive elem ent. For such condition a circle current limits only by active winding resistance of ballast throttle as well as by MHL resistance. Because of their extremely small quantaties the anomalous currents, which considerably exceed nominal sense appear in the circle. For removal of anomalous currents it is offered to make use of method of forced relighting in MHL lighting mode. It is proved, that application of method of forced lighting balancing during MHL lighting, unlike other methods, fully takes away anomalous currents. This is confirmed also by the experimental data. Besides, an offered method allows, when necessary, to realize adjustment of lamp current.In the work a mathematical circles modeling with high intensive light sources is considered. It is shown the superiorities and lacks of methods of harmonious analysis, equivalent sinusoid, fitting and operating. It is proved, that for analysis of anomalous work modes of high intensive light sources, the most acceptable is the method of application of differentiate mathematical circle elements models. It is shown, that for MHL the most acceptable are the mathematical models, in which the determining parameters are average concentration and electrons mobility.Carried out research complex of influence of non linearity ballast throttle, feeding voltage deviations from nominal value, encreasing of relative lamp burning voltage, current forms and voltage on electric MHL parameters allowed to get their optimum correlations and to get at essential reduction of experimental works during development, designing and exploitation. For realization of offered removal method of anomalous MHL currents by compulsory ballansing electric scheme of hybrid start -regulating device is developed and practically realized. It allows to get the following advantages : arson impulse is formed into both half-cycles; impulse duration is considerably higher; the voltage in the first moment after clamp essentially exceeds feeding voltage, that contributes to successful digit development in lamp. Due to above mentioned peculiarities of hybrid start -regulating device a reliable kindling, removal of anomalous currents of periodic transitional processes, power adjustment possibility, lamp current stabilization is provided. However, more essentially advantages can be reached during application of offered method of prevention of appearance of anomalous modes during lamp lighting time in schemes of group balancing. Key words: metal-halogenous lamps, high intensive light sources, relighting, anomalous currents.