Analysis and design of high power density resonant switched-capacitor converters

Swtiched;Capacitor;Power Electronics;Power Density;High Efficiency;Dickson;Capacitor;Resonant;Split-Phase;Soft-charging;Soft-switching;Gallium Nitride (GaN)

Macy, Benjamin Blake

关键词: Swtiched;    Capacitor;    Power Electronics;    Power Density;    High Efficiency;    Dickson;    Capacitor;    Resonant;    Split-Phase;    Soft-charging;    Soft-switching;    Gallium Nitride (GaN);   

Others  :  https://www.ideals.illinois.edu/bitstream/handle/2142/78454/MACY-THESIS-2015.pdf?sequence=1&isAllowed=y

美国|英语

来源: The Illinois Digital Environment for Access to Learning and Scholarship

【 摘 要 】

This thesis is motivated by the desire for power electronics designers to create power electronic converters that have high energy density (are very small) and high efficiency (few losses).Switched-capacitor (SC) topologies that utilize the high energy density of capacitors are a candidate for fulfilling these two criteria.However, there are inherent limitations in conventional switched capacitor converters where a designer is required to make a trade-off between efficiency and capacitor energy density utilization.One way to overcome this obstacle is to utilize resonance in a SC converter.This work proposes a resonant, voltage step-up Dickson SC converter.A single inductor is utilized to achieve zero current switching of all transistors, which allows for high switching frequency and high conversion efficiency. A split-phase control scheme is used in order to eliminate the current transients associated with the Dickson SC converter and the resultant power loss. Employing these techniques, a Dickson SC converter prototype is implemented with GaN transistors. The converter is able to achieve high power density while maintaining high efficiency because of the control techniques that are employed.