Design and performance of digital ballast for HPS lamps

Author

Weiqiang, Zhang ; Dianguo, Xu ; Lee, Chi-Hwan

Author_Institution

Dept. of Electr. Eng., Harbin Inst. of Technol., China

Volume

2

fYear

2003

fDate

9-13 Feb. 2003

Firstpage

1205

Abstract

This paper presents the design and performance of digital ballast for HPS lamps, which employs a 8-bit microprocessor to improve the starting technique and operate HPS lamp at rated power over the service life. The system offers the capability of dimming lamp from 100 % to 50 % power by changing the switching frequency of the inverter. It is also found that, under present experimental conditions, the lamp is free acoustic frequency and resistive operated at high frequency. The 3.2 kV ignition pulse is sufficient for a cold 250 W HPS lamp startup. Experimental measurements have shown the feasibility of the digital ballast with the proposed control strategies.

Keywords

electric ignition; invertors; lamp accessories; lighting control; metal vapour lamps; power control; switching convertors; 250 W; 3.2 kV; 8-bit microprocessor; HPS lamp; acoustic frequency; control strategy; digital ballast design; digital ballast performance; ignition pulse; inverter switching frequency; lamp dimming capability; lamp starting technique; lighting; rated power; Circuits; Electronic ballasts; Fluorescence; Fluorescent lamps; Frequency; High intensity discharge lamps; Ignition; Microprocessors; Resonance; Voltage;

fLanguage

English

Publisher

ieee

Conference_Titel

Applied Power Electronics Conference and Exposition, 2003. APEC '03. Eighteenth Annual IEEE

Conference_Location

Miami Beach, FL, USA

Print_ISBN

0-7803-7768-0

Type

conf

DOI

10.1109/APEC.2003.1179369

Filename

1179369