Once the lamp current is elevated, the doing work voltage with the lamp tube drop, but provide voltage will not be decreased more of this voltage applied towards the lamp tube will make the lamp current rise additional, so the cycle, inevitably burned out lamp or lamp extinguished, so for making the lamp operates commonly, need to match to town movement components, utilised to restrict and stabilize the lamp recent. This limiting gadget is known as a ballast. At current, you will discover two types of ballast for gasoline discharge lamps. the ballast circuit operating characteristic curve as proven in Figure fuel discharge lamp while in the AC energy provide get the job done, gasoline or metal vapor discharge characteristics based upon the frequency from the alternating latest as well as the town flow element form. Gas discharge lamp,50Hz/60Hz power supply, the impedance with the lamp throughout the total AC power provide cycle has become consistently modifying, resulting in a non sinusoidal voltage and present waveforms, leading to a harmonic component. The working frequency from the fuel discharge lamp is about.In 1kHz, the ionization state with the lamp isn’t shifting with all the doing work existing from the lamp, consequently forming a practically consistent plasma density and lamp impedance within the entire operating week.
V-I characteristics are usually linear, and also the distortion from the lamp present is reduced, plus the working frequency in the lamp is 50Hz electrical power provide once the luminous efficiency with the comparison curve as proven in Figure six may be noticed, once the gas discharge lamp AC electrical power provide frequency is higher than 20kHz, fluorescent light fixture luminous efficiency ratio Luminous efficiency 50Hz AC electrical power supply once the fluorescent lamp is higher, according to statistics might be enhanced 10%~20%, in the exact same time, the fluorescent lamp operates from the higher frequency AC electrical power supply state, it can proficiently conquer the fluorescent phenomenon with the fluorescent lamp. This can be also a substantial frequency AC electronic ballast with respect to 1 on the strengths of magnetic ballast as a consequence of high frequency AC electronic ballast making use of high-frequency switching converter circuit realization of ballast, without any flicker, higher efficiency, volume of filial piety, light high quality, dimming, without the need of using a series of positive aspects substantial amounts of copper and silicon steel elements, so since the 1970s, high-frequency AC electronic ballast to get a published, through the welcome the majority of customers.