Presentation of a new design current supply based on inductive ballast; ripple comparison with SMPS
Journal Title: ANALELE UNIVERSITATII DIN CRAIOVA - Seria Inginerie electrica - Year 2013, Vol 37, Issue 37
Abstract
This paper presents a new design approach of a very low cost LED power supply. The innovation comes from the reusage of the inductive ballast already functioning in street lighting solutions based on fluorescent lamps. No active component, except a rectifying bridge was used. Instead, for circuit compensation, passive circuit elements like resistor, coil and capacitance were used. This power supply solution was created as an alternative of more complex and more expensive SMPS (switching mode power supply), having a lower efficacy also. Design principle and architecture of the driver are explained. Output voltage and current ripples were studied using simulation tools. The influence of the value associated to inductive ballast and to the electrolytic capacitor was studied in order to obtain the best compromise between electrical solution and cost. Technical specifications of the LED cluster were taken into account for current supply design. Output ripples of a SMPS were compared with the best chosen inductive ballast current supply. Advantages and disadvantages of each solution are explained.
Authors and Affiliations
Radu Bogdan Dragomir, Brandusa Pantelimon, Radu Dragomir, Dorina Dragomir
Keywords
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