Asymmetrical group-pulse-width-modulated technique for eliminating striation in the dimmable fluorescent lamps

Author

Hsieh, Guan-Chyun ; Liu, Wei-Hsiang ; Lin, Chang-Hua ; Hsieh, Hung-I

Author_Institution

Dept. of Electron. Eng., Nat. Taiwan Univ. of Sci. & Technol., Taipei, Taiwan

Volume

2

fYear

2001

fDate

2001

Firstpage

1090

Abstract

An asymmetrical group-pulse-width-modulated (AGPWM) control strategy is proposed for eliminating the striation in a dimmable fluorescent lamp. The approach is executed by alternately modulating the pulse-width of a group-driving signal with a suitable period to reduce the odd harmonic amplitudes of the lamp current and increase the even ones. The striation in the lamp disappears due to all amplitudes of the distributed harmonics in the lamp current spectrum are close to each other. Therefore, the lighting efficiency increases and the total harmonic distortion is reduced. In this paper, a half-bridge series-resonant inverter (HB-SRI) is used for realizing the ballast operation with the proposed controller. A modeling work and a control strategy for system analysis and performance evaluation are clearly conducted. The examined prototype with simulation and experiment is presented for assessing the theoretical predictions. Experiment shows that no striation occurs during wide-range dimmer of 1%-100%

Keywords

DC-AC power convertors; PWM invertors; bridge circuits; control system analysis; control system synthesis; fluorescent lamps; harmonic distortion; harmonics suppression; lamp accessories; lighting control; power conversion harmonics; resonant power convertors; asymmetrical group-pulse-width-modulated control strategy; ballast operation; control design; control performance; control simulation; dimmable fluorescent lamps; group-driving signal; half-bridge series-resonant inverter; lamp current odd harmonic amplitudes reduction; lamp current spectrum; lighting efficiency; performance evaluation; striation elimination; total harmonic distortion; Amplitude modulation; Control system synthesis; Electronic ballasts; Fluorescent lamps; Performance analysis; Pulse modulation; Pulse width modulation inverters; Space vector pulse width modulation; Total harmonic distortion; Virtual prototyping;

fLanguage

English

Publisher

ieee

Conference_Titel

Industrial Electronics Society, 2001. IECON '01. The 27th Annual Conference of the IEEE

Conference_Location

Denver, CO

Print_ISBN

0-7803-7108-9

Type

conf

DOI

10.1109/IECON.2001.975932

Filename

975932