DEVELOPING A COMBINED SOFT-SWITCHING BIDIRECTIONAL DC/DC CONVERTER FOR SOLAR -POWERED LED STREET LIGHTS
Girija K G
Lecturer In Electronics Engineering, Sree Rama Govt. Polytechnic College Thriprayar, Valapad P O, Thrissur (Dt)
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Soft switching increases efficiency and equipment lifespan by lowering voltage and current stress during transitions, smoothing and quieting processes, and lowering electromagnetic interference. Power electronics soft switching is influenced by circuit design, component choice, and switching frequency optimisation. A street lighting LED luminaire based on modular drivers is proposed in this work. A driver made up of two integrated DC-DC converters makes up each module. The first is a buck-boost converter that corrects power factor, while the second is a buck converter that regulates load current. The discontinuous conduction mode of current is used by both converters. Each driver provides a separate set of power LEDs to make the system resilient to failure. Therefore, the system is not totally affected in the event that one or more drivers fail. The electronic drivers' design is shown. Additionally, it uses pulse-width modulation (PWM) dimming to manage the LED-SLS's illumination. The suggested CI-BDC functions as a traditional BDC by turning off the auxiliary circuit in order to retain high efficiency even at light loads. Consequently, at light loads, the large conduction losses in it are avoided. To demonstrate the viability of the suggested solution, experimental results of a prototype with a rated power of 50 W (two modules of 25 W) are conducted.
Keywords: LED driver; linked inductor; bidirectional; buck-boost; soft switching
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