Design of powerful high-performance drivers for special-purpose LED lighting systems

This paper presents the results of the study of the parameters and characteristics of the developed high-performance electronic control circuits for special-purpose LED lighting systems based on a two-stage forward converter (driver) with an output power of more than 200 W. Operation of the developed driver in the output power range of 13 to 202 W and the supply voltage range of 160 to 250 V was investigated. The maximum efficiency of the developed power supply system at the voltage of 240 V and the output power of 140 W is 89.9%. For the chosen topology, further voltage increase may increase the efficiency, but lead to accelerated degradation of the driver components. The results of the experimental studies of the developed drivers showed the drivers efficiency in the range of 84 to 90% at a load of 52…202 W with a power factor above 0.97 and a nonlinear current distortion factor less than 23.4% over the entire studied range of supply voltages. The high efficiency of the developed driver in a wide range of output power suggests the possibility of using the driver in lighting systems that provide additional power supply to energy storage systems (batteries), including those ensuring operation in the absence of mains power supply.