Title :
A 250 W high pressure sodium lamp high power factor electronic ballast using an ac chopper
Author :
Sincero, Geraldo C R ; Franciosi, André S. ; Perin, Arnaldo J.
Author_Institution :
Dept. of Electr. Eng., Fed. Univ. of Santa Catarina, Florianopolis
Abstract :
A novel high pressure sodium lamp (HPS) electronic ballast topology with high power factor (HPF) is presented. Instead of using a power factor correction (PFC) stage, an ac chopper is capable of achieving a HPF and of supplying high frequency current to the lamp. Due to its output characteristic the lamp current presents a low frequency modulation at the voltage source frequency and the consequences of this operation are discussed. Afterwards, different converter topologies, bi-directional switches and modulation strategies for the ac-ac converter are presented. Finally, experimental results of a prototype for 250 W HPS lamps are discussed
Keywords :
choppers (circuits); frequency modulation; lamp accessories; lamps; power factor; sodium; switching convertors; 250 W; PFC; ac chopper; ac-ac converter; bidirectional switches; converter topologies; high frequency current; high power factor electronic ballast; high pressure sodium lamp; low frequency modulation; voltage source frequency; Choppers; Circuit topology; Current supplies; Electronic ballasts; Frequency modulation; Lamps; Power factor correction; Reactive power; Switching converters; Voltage; AC/AC converter; electronic ballast modulation strategy; power factor correction; soft switching;
Conference_Titel :
Power Electronics and Applications, 2005 European Conference on
Conference_Location :
Dresden
Print_ISBN :
90-75815-09-3
DOI :
10.1109/EPE.2005.219295
