LED driver with three-phase series resonant converter with reduced source ripple current

Abstract

LEDs are the present day light sources which require suitable driver for maintaining the appropriate current in it for proper operation. If such kind of systems are powered from PV panels, the possibility of ripples in the source current are more based on the converter being used. This paper proposes a power controller to reduce the ripples in the source current with an ability of driving the LED. In the proposed circuit, a 3 phase full bridge series resonant inverter followed by a rectifier feeds the LED load. For regulating the current in the LED a small power converter is used additionally. Pulse Width Modulation (PWM) is used for dimming operation of the light source. Soft switching is used for high efficiency. The proposed converter is studied using MATLAB simulation. This configuration is also suitable for handling large power.