Investigation and Modeling of the Starting Processes of High-Intensity-Discharge Lamps Driven by Extra High Frequency Electronic Ballast

Project: Research

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Lighting systems consume 18% of the total electric energy in many industrialized countries. Among light sources, high-intensity-discharge (HID) lamps, especially metal-halide (MH) lamps, are increasingly popular for lighting systems because of their high luminous efficacy and long lifetime. HID lamps are now widely used in automobiles, projectors, sports arenas, photon assisted processes, and so on. However, HID lamps under electronic control may suffer an acoustic resonance problem resulting in unstable arc operation at high frequencies. Their starting processes are highly nonlinear and difficult to predict. The starting processes at extra high frequencies may cause damage on switches in electronic ballast bridge and arc extinction in igniting HID lamps. So far, no HID lamp model exists that can predict various stages of the ignition process.In this project, based on the physical behaviours of the electrodes and the plasma discharge, and practical examinations on lamp arc discharge behaviours caused by different electronic ballast topologies, a new HID lamp model that can predict various stages of nonlinear discharge mechanisms of the ignition process will be developed. This model will provide a tool for ballast designers to choose an appropriate ballast topology to meet different requirements. Successful completion of this project will solve a major problem in HID lamp ballast design and lead to long-term energy saving in lighting systems and reduction of Greenhouse gases.


Project number9041269
Grant typeGRF
Effective start/end date1/10/0712/05/11