A 250 W high pressure sodium lamp high power factor electronic ballast using an ac chopper

G.C.R Sincero,A.S Franciosi,A.J Perin

doi:10.1109/epe.2005.219295

A 250 W high pressure sodium lamp high power factor electronic ballast using an ac chopper

G.C.R Sincero, A.S Franciosi + Show 1 more

https://doi.org/10.1109/epe.2005.219295

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Publication Date: Jan 1, 2005

Citations: 16

#High Pressure Sodium Lamp #High Power Factor + Show 8 more

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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

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