Optimal Self-Tuning Control for Data-Centers’ 48V-12V ZCS-STC

Sovik, Guy; Urkin, Tom; Masandilov, Erez Erzol; Peretz, Mor Mordechai

doi:10.1109/apec39645.2020.9124129

Cited by 3 publications

(2 citation statements)

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“…2(a), which has been acknowledged as a versatile modular approach similar to the modular multilevel switched-capacitor resonant converter (MMSCRC) in [44] which demonstrated regulation and full ZVS. Extending this, [45] demonstrated adaptive control for further refinement and optimized operation. However, the inductor(s) in tank-based topologies must conduct bi-directional current flow, dissimilar to "direct" converters with inductor(s) at the output, and so often have poorer magnetic losses [31].…”

Section: Contemporary Dickson Convertersmentioning

confidence: 91%

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Large Signal Analysis on Variations of the Hybridized Dickson Switched-Capacitor Converter

Ellis

Amirtharajah

2022

IEEE Trans. Power Electron.

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Dickson-type DC-DC converters have gained renewed interest in recent years due to their best-in-class volt-amp switch utilization. In addition, "hybrid" switched-capacitor (HSC) structures increase passive component utilization while avoiding the slow-switching limit (SSL), and yet, most HSC work to date has done little to assess large signal voltage ripple behavior and subsequent passive utilization limits. This work contributes a comprehensive review of contemporary Dickson-type HSC converters before introducing eight fundamental reduced HSC Dickson structures, including three that are proposed here. Analysis allowing characterization of large signal operating points, capacitor sizing regimes, switching schemes, and maximum allowable power throughput is introduced. The analysis for "splitphase" switching is also presented in detail, without making small ripple approximations. Furthermore, an expression for large ripple flying capacitor energy density utilization is derived, assisting with optimal topology selection and revealing that splitphase operation may be preferable for conversion ratios greater than 6:1. All analysis is verified in simulation, with an additional discrete hardware prototype further validating a complex case of resonant split-phase timing. The analytical results of seventeen distinct Dickson variations are recorded, assisting with topology selection and design.

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Section: Contemporary Dickson Convertersmentioning

confidence: 91%

“…Here, the unique equations for even and odd capacitor sizes given in ( 27) and ( 28) result in an α comprised of two parts. An expression for η max is then obtained by combining ( 34), (39), and ( 43)- (45).…”

Section: A Example: Constrained Capacitor Utilizationmentioning

confidence: 99%