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ABSTRACT

This paper presents a novel LED drive system based on matrix rectifier. Matrix rectifier is applied to the LED drive system for the first time as to our knowledge. The novel LED drive system is composed of two stages. The first stage is the matrix rectifier, and the second stage is the multi-port two transistor forward converters (TTFC) that share a leg. The space vector modulation strategy of matrix rectifier and the modulation strategy of multi-port TTFC matched with rectifier stage are fully studied. In order to maintain the stability of output current, current PI closed-loop control is adopted for LED strings. Both simulation and experiment are carried out to verify the topology and modulation strategy of the proposed LED drive system. NOVEL LED DRIVE SYSTEM BASED ON MATRIX RECTIFIER