2.65-MHz Self-Oscillating Complementary Electronic Ballast With Constant-Lamp-Current Control for a Metal Halide Lamp

• Published in: IEEE transactions on power electronics Vol. 22; no. 6; pp. 2097 - 2105
• Main Authors: LIN, Ray-Lee, WANG, Zhi-Qiang, LEE, Yan-Der, CHEN, Feng-Yin
• Format: Journal Article
• Language: English
• Published: New York, NY IEEE 01.11.2007; Institute of Electrical and Electronics Engineers; The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
• Subjects: 2.65 MHz; Acoustic resonance; Acoustics; Applied sciences; Ballast; complimentary; Controllers; Design; Electric currents; Electrical engineering. Electrical power engineering; Electrical machines; Electrodeless lamps; Electromagnetic compatibility; Electromagnetic interference; electromagnetic interference (EMI) chimney; Electronic ballasts; Electronics; Exact sciences and technology; Fluorescent lamps; Fundamental areas of phenomenology (including applications); high intensity discharge (HID); High intensity discharge lamps; Inverters; Lamps; lighting; Metal halide lamps; Miscellaneous; MOSFET circuits; Optical sources and standards; Optics; Physics; Prototypes; Radio frequency; Regulation and control; Resonance; self-oscillating; Switching frequency; Transformers and inductors; Various equipment and components; Voltage; Prototype; Lighting fitting; Electromagnetic compatibility; Implementation; self-oscillating; Ballast electricity; Electromagnetic disturbance; high intensity discharge (HID); Switching conditions; Electromagnetic interference; Halides lamp; Selfoscillation; Lighting equipment; 2.65 MHz; High intensity; Control system; Acoustical resonance; RF systems; lighting; complimentary; Switching; ballast; Current control; Acoustic resonance; elec- I tromagnetic interference (EMI) chimney
• ISSN: 0885-8993; 1941-0107
• DOI: 10.1109/TPEL.2007.909287

This paper presents the design and implementation of the 2.65-MHz self-oscillating complementary electronic ballast with a constant-lamp-current control for a metal halide lamp. In order to avoid the inherent acoustic-resonance problem of metal halide lamps, the ballast's switching-frequency level was selected to be 2.65 MHz, which satisfies higher magnitudes of maximum electromagnetic interference (EMI) limitation at frequencies of between 2.5 to 3.0 MHz, within the EMI/electromagnetic compatibility frequency range ldquochimney,rdquo for RF lighting systems. With the constant-lamp-current control scheme, the lamp current can be regulated to be less dependent on the input ac voltage. Finally, a 20-W prototype ballast is implemented to demonstrate the ability to avoid the acoustic-resonance and to provide constant levels of lamp current.