Effect of Resonant Capacitance and Inductance on Peak Capacitor Voltage and Inductor Current in SLR Converter
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With an ever-increasing number of portable electronic devices being used worldwide, increasing attention has been drawn to efficiently charging and powering these devices. While conventional PWM-based topologies such as buck and flyback converters are ubiquitous in consumer electronics, the desire for increased efficiency, larger power output, and smaller size has caused engineers to look at other power supply topologies. One topology that can satisfy all of these desires is the Series-Loaded Resonant (SLR) converter. This topology uses a resonant tank to facilitate soft switching, resulting in very low switching losses, higher efficiency, higher switching frequencies, and smaller system size. This study examines how changing the capacitance and inductance values of the resonant tank affects the peak capacitor voltage and the peak inductor current which further impacts the sizing of all other components, and thus the overall cost of the converter. By characterizing these parameters, designers can more easily optimize component selection to achieve appropriate cost-benefit of their converter design.
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