Hybrid electronic ballast operating the HPS lamp at constant power

Author

Kaiser, Walter

Author_Institution

Escola Politecnica, Sao Paulo Univ., Brazil

Volume

4

fYear

1996

fDate

6-10 Oct 1996

Firstpage

2103

Abstract

A hybrid solid-state ballast is described that operates the HPS (high pressure sodium) lamp at mains frequency with constant power through rated life. The system utilizes two series-connected inductors and a bidirectional semiconductor switch connected in parallel to one of them. A lamp starting circuit has also been included in the ballast. The static switch, with phase angle control provided by power feedback, actuates on lamp current compensating variations of the mains voltage and/or the increase of lamp voltage. The system offers: a) an increase of lamp life and system lumen maintenance; b) power factor and total harmonic distortion of line current comparable to conventional lag ballasts; and c) operating cost savings, both in terms of energy cost and lamp replacement cost

Keywords

lamp accessories; metal vapour lamps; power semiconductor switches; starting; switching circuits; Na; bidirectional semiconductor switch; constant power operation; energy cost; high pressure sodium lamp; hybrid solid-state ballast; lamp life; lamp replacement cost; line current; lumen maintenance; mains frequency operation; operating cost savings; phase angle control; power factor; power feedback; series-connected inductors; total harmonic distortion; Costs; Electronic ballasts; Feedback; Frequency; Inductors; Lamps; Power semiconductor switches; Reactive power; Solid state circuits; Voltage control;

fLanguage

English

Publisher

ieee

Conference_Titel

Industry Applications Conference, 1996. Thirty-First IAS Annual Meeting, IAS '96., Conference Record of the 1996 IEEE

Conference_Location

San Diego, CA

ISSN

0197-2618

Print_ISBN

0-7803-3544-9

Type

conf

DOI

10.1109/IAS.1996.563865

Filename

563865