Open AccessContribution to digital power factor correction controllers in high intensity discharge lamps electronic ballast applications
Author(s) -
Diaz Francisco Javier,
Lopez Victor M.,
Azcondo Francisco J.,
Brañas Christian,
Casanueva Rosario
Publication year - 2014
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2013.0401
Subject(s) - ballast , controller (irrigation) , flicker , gas discharge lamp , digital control , control theory (sociology) , voltage , power factor , luminance , electric light , voltage controller , compensation (psychology) , engineering , electrical engineering , computer science , voltage regulator , voltage droop , artificial intelligence , control (management) , psychology , agronomy , psychoanalysis , biology
Utility voltage fluctuations not compensated by the low‐frequency voltage loop of the power factor correction (PFC) stage cause a perceptible variation in the light emitted by lamps, unpleasant for the human eye and known as flicker effect. A novel extension of the digital control for PFC stages analyses the input voltage, detects the fluctuations in the range of human flicker sensitivity and modifies the PFC output voltage controller to avoid their propagation to the DC bus. The purpose of the controller is to make the PFC compatible with any second stage lamp driver, assuring the mitigation of the lamp light variation caused by utility disturbances in consistent with the human eye perception. The controller is implemented in a field programmable gate array. A constant lamp luminance is achieved with this digital controller with no dependence on the next ballast stage.