Projeto e implementação de um driver para lâmpadas de LED empregadas em iluminação de interiores

Abstract

This work highlights the importance of the artificial lighting for humans and emphasizes the use of LEDs for this purpose. The author developed a driver for a low-power LED lamp showing the need for drivers to control this type of lamps. In brief, this work deals with the stage of the driver: the rectification stages, DC-DC converter and loop controls. Subsequently, the paper presents the design of each one of the stages, and later it shows the implementation process. This project used the flyback topology of DC-DC converters and snubber circuits to preserve the semiconductors used in the implementation. On the coupled inductor design used in this project, the importance of reducing the leakage inductance and how the winding should be done is displayed. The flyback modeling is made through the small signal AC model and is projected a PI current controller for the LEDs. The simulation of the driver are held on a simulation software named PSIMR including the open loop and closed loop of the driver, and the results of those simulation are presented. A prototype for the acquisition of experimental results is built, also open loop and closed loop.