Title :
Stability study and control methods for small-wattage high-intensity-discharge (HID) lamps
Author :
Yan, Wei ; Ho, Y.K.E. ; Hui, S.Y.R.
Author_Institution :
Dept. of Electron. Eng., City Univ. of Hong Kong, Kowloon, China
Abstract :
The increasing speed of modern power electronics opens a way to study the stability of high-intensity-discharge lamps at very-high-frequency operation. In this paper, a lamp stability study based on a simplified theory on acoustic resonance frequency distribution in a small-wattage metal-halide (MH) lamp is presented. The frequency characteristic of a low-wattage MH lamp has been analyzed. Up to 700 kHz, extensive experiments using resonant-type electronic ballast have been conducted on 35-W MH lamps to investigate different control methods for avoiding acoustic resonance. The results indicate that a randomized switching scheme cannot always eliminate are instabilities caused by acoustic resonances in small-wattage MH lamps. The stability frequency regions should be identified. A stable arc can be obtained when the lamp is operated above the highest acoustic resonance frequency
Keywords :
acoustic resonance; lamp accessories; lighting control; metal vapour lamps; stability; 35 W; 700 kHz; HID lamps; acoustic resonance avoidance; acoustic resonance frequency distribution; control methods; randomized switching scheme; resonant-type electronic ballast; small-wattage high-intensity-discharge lamps; stability; stability frequency regions; very-high-frequency operation; Electronic ballasts; Fault location; High intensity discharge lamps; Industry Applications Society; Light sources; Manufacturing; Power electronics; Power system stability; Resonance; Resonant frequency;
Journal_Title :
Industry Applications, IEEE Transactions on
