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Adaptive front lighting system becomes more and more popular today. Not only in combustion engine vehicles, but also in some of those new model electric vehicles. Since the new head lamp control system contains several components including drives and controls. Any error on design may affect the overall performance of the system. The simulation of the auto-levelling control system is very important...
High-intensity discharge (HID) lamps are becoming popular substitutes for halogen lamps in automotive headlamps because of the high lumen/watt ratio and the color of the light. In this paper, a ballast (integrated with a voltage multiplier circuit in the secondary winding of the dc converter transformer) with dimming control is presented. The proposed circuit not only eliminates one auxiliary winding...
It is the purpose of this paper to explore the problem of dimming the HID lamp used in the automotive headlight system. To investigate the relationship between the lamp power and control parameters, a power-dependent HID lamp model is established in this paper. The two methods, dynamic duty-ratio control and dynamic bus voltage control, are analyze and applied in the system. The dynamic bus voltage...
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